Surface Functionalization of Microporous Polypropylene Membrane with Polyols for Removal of Boron Acid from Aqueous Solution

Affinity membranes are fabricated for boric acid removal by the surface functionalization of microporous polypropylene membrane(MPPM)with lactose-based polyols.The affinity is based on specific complexation between boric acid and saccharide polyols.A photoinduced grafting-chemical reaction sequence was used to prepare these affinity membranes.Poly(2-aminoethyl methacrylate hydrochloride)[poly(AEMA)]was grafted on the surfaces of MPPM by UV-induced graft polymerization.Grafting in the membrane pores was visualized by dying the cross-section of poly(AEMA)-grafted MPPM with fluorescein disodium and imaging with confocal laser scanning microscopy.It is concluded that lactose ligands can be covalently immobilized on the external surface and in the pores by the subsequent coupling of poly(AEMA)with lactobionic acid(LA).Physical and chemical properties of the affinity membranes were characterized by field emission scanning electron microscopy and Fourier Transform Infrared/Attenuated Total Refraction spectroscopy(FT-IR/ATR).3-Aminophenyl boric acid(3-APBA)was removed from aqueous solution by a single piece of lactose-functionalized MPPM in a dynamic filtration system.The results show that the 3-APBA removal reaches an optimal efficiency(39.5%)under the alkaline condition(pH9.1),which can be improved by increasing the immobilization density of LA.Regeneration of these affinity membranes can be easily realized through acid-base washing because the complexation of boric acid and saccharide polyol is reversible.

Preparation and Characterization of Functionalized Polypropylene with Acrylamide and Itaconic Acid

Functionalized polypropylene with acryl amide (AAm) and itaconic acid (IA) were prepared in the molten state in the presence of dicumyl peroxide. The effects of the concentration of both mono- mers on the degree of functionalization and properties of the products were investigated by FT-IR, contact angle measurement and DSC analysis. It was found that the degree of functionalization depends on the initial concentration of both monomers that used in the reaction. The influence of the AAm and IA content on the melting and crystallization temperature of PP was investigated by DSC. The contact angle of water on film surfaces of the functionalized PP (PP-g-AAm and PP-g-IA) decreased with increasing modified polymer content. From FT-IR spectra of functionalized PP a calculation was made of carbonyl index on the films surfaces. It was found that the higher intensity of the carbonyl index, the lower contact angle value and the lower crystallinity confirmed the ex- istence of functionalized AAm and/or IA in PP. It was concluded from the different characteriza- tion methods that the polarity and percentage of functionalized PP were increased up to 3 phr for both monomers, and then it was decreased by increasing the amount of monomers and had a threshold value, due to nucleating agents of monomers in PP.

Functionalization of Polypropylene with High Dielectric Properties: Applications in Electric Energy Storage

Biaxial-oriented polypropylene (BOPP) thin films are currently used as dielectrics in state-of-the-art capacitors that show many advantages, such as low energy loss and high breakdown strength, but a limited energy density ( 600 MV/m. The PP-OH dielectric demonstrates a linear reversible charge storage behavior with high releasing energy density > 7 J/cm3 (2 - 3 times of BOPP) after an applied electric field at E = 600 MV/m, without showing any significant increase of energy loss and remnant polarization at zero electric field. On the other hand, a cross-linked polypropylene (x-PP) exhibits an ε ~ 3, which is independent of a wide range of temperatures and frequencies, slim polarization loops, high breakdown strength (E = 650 MV/m), narrow breakdown distribution, and reliable energy storage capacity > 5 J/cm3 (double that of state-of-the-art BOPP capacitors), without showing any increase in energy loss.

Direct Synthesis of Ultrahigh Molecular Weight Functionalized Isotactic Polypropylene

Ultrahigh molecular weight functionalized isotactic polypropylene(f-UHMW-iPP)through the direct copolymerization of propylene with polar monomers is highly desirable but has not been accessed thus far because it involves challenging regio-and stereochemistry along with usually reduced molecular weight.Herein,in contrast to the unsuccessful catalyst strategy,a polar monomer-assisted strategy is used to access the above material.The introduction of O-or S-functionalized long-chain polar olefins into the hafnium-catalyzed copolymerization of propylene(and bulkierα-olefins)significantly increases the copolymer molecular weight with a maximum observed increase of+488%.f-UHMW-iPP and functionalized isotactic poly(α-olefin)s(M_(w)>2000 kDa,[mmmm]:99%)are thus prepared at ambient conditions.The incorporation of 1 mol%of polar monomer improves the surface property and significantly increases the long-sought toughness(860%)of brittle iPP,without reducing the tensile strength(42 MPa)due to the key achievement of ultrahigh molecular weight.A discussion of the mechanism involved in the beneficial effects of incorporating the polar monomer is herein presented by an in-depth density functional theory calculation.

Efficacy of invisible advancement correction for mandibular retraction in adolescents based on Pancherz analysis

BACKGROUND Mandibular retraction is the main etiological mechanism of class II malocclusion in China and the subsequent distal molar relationship can cause functional discomfort in mastication,breathing and the temporomandibular joint.The use of mandibular advancement(MA)devices has recently emerged as an adolescent mandibular retraction treatment;however,current studies regarding the effect thereof are relatively few,and there is lack of sufficient clinical support.AIM To investigate the clinical effect of invisalign MA on the treatment of mandibular retraction in adolescents.METHODS This study included 30 adolescent patients who underwent treatment with the MA appliances from December 2017 to June 2021.The lateral cephalometric data before and after treatment were collected and imported into Dolphin Imaging software.The changes were measured by linear measurement superimposed with lateral cephalometric trajectory based on the Pancherz technology.RESULTS There was no significant difference in the length and position of maxilla before and after the treatment.The position of the mandible moved 3.13 mm,the length increased 4.14 mm,the mandibular ramus length increased 4.09 mm,the body length increased 4.25 mm,and the position of the condyle moved 1.03 mm forward after treatment.Additionally,changes in the incisor sagittal position and labial inclination were observed.The position of the upper incisor point moved back 1.33 mm,without statistical difference,the inclination and tooth angle decreased by 3.44°and 4.06°,respectively;the position of the lower incisor point was moved 2.98 mm,and the inclination and tooth angle increased by 2.62°and 1.23°,respectively.Furthermore,changes in the incisor overjet and molar relationship were seen.Overjet decreased by 4.31 mm,of which 1.78 mm was due to dental factors,accounting for 41.3%of the effect as opposed to 58.7%due to skeletal factors.Molar relationship improved 3.87 mm,with 1.34 mm due to dental factors,and dental and skeletal factors were accounted for 34.6%and 65.4%of the effect,respectively.CONCLUSION For adolescent patients with mandible retraction,invisalign MA can effectively promote the mandible growth,and it was proven to be mainly due to skeletal effects.

Synthesis and characterization of novel polypropylene paper releasing anion

Polypropylene synthetic paper releasing anion was prepared from polypropylene resin, anion additives, titanium dioxide, etc., by calendar forming method. The synthetic paper was tested by anion detector, SEM, AFM, etc. Tensile strength, elongation at break, fight angle tear strength of the polypropylene synthetic paper reached the GB 13022 or QB/T1130 Standard. The synthetic paper was water and oil resistance, and released anions 10,530 cm^-3. It was environment-friendly, and a kind of good material for human＇s health.

Nonlinear stability of advanced sandwich cylindrical shells comprising porous functionally graded material and carbon nanotube reinforced composite layers under elevated temperature

The nonlinear stability of sandwich cylindrical shells comprising porous functionally graded material(FGM) and carbon nanotube reinforced composite(CNTRC)layers subjected to uniform temperature rise is investigated. Two sandwich models corresponding to CNTRC and FGM face sheets are proposed. Carbon nanotubes(CNTs) in the CNTRC layer are embedded into a matrix according to functionally graded distributions. The effects of porosity in the FGM and the temperature dependence of properties of all constituent materials are considered. The effective properties of the porous FGM and CNTRC are determined by using the modified and extended versions of a linear mixture rule, respectively. The basic equations governing the stability problem of thin sandwich cylindrical shells are established within the framework of the Donnell shell theory including the von K’arm’an-Donnell nonlinearity. These equations are solved by using the multi-term analytical solutions and the Galerkin method for simply supported shells.The critical buckling temperatures and postbuckling paths are determined through an iteration procedure. The study reveals that the sandwich shell model with a CNTRC core layer and relatively thin porous FGM face sheets can have the best capacity of thermal load carrying. In addition, unlike the cases of mechanical loads, porosities have beneficial effects on the nonlinear stability of sandwich shells under the thermal load. It is suggested that an appropriate combination of advantages of FGM and CNTRC can result in optimal efficiency for advanced sandwich structures.

A Study of Fabrication Technique, Structural and Morphological Behavior of Polypropylene Reinforced with Short Natural Fiber Banana

Fiber reinforced polypropylene has been widely accepted as material for structural and engineering applications in recent years.Jute,Banana fibers etc.are the most common low cost,versatile,renewable and abundantly available natural fibers which have biodegradable properties.All these fibers are versatile,renewable and most common agro based fibers that have enormous aspect due to their potentiality in composite manufacture.In comparison to other artificial fibers there are many advantages of natural fibers due to everyday applications such as,paperweight,suitcases,lampshades,helmets,and shower and bath units.Untreated and alkali treated banana fiber reinforced with Polypropylene matrix composite were fabricated with 10-25%loading of fiber by weight and were fabricated as Polypropylene Banana Composite(PPBC).Using melt mixing hot press molding technique these biodegradable composites were prepared.Different characteristics like morphologies and micro structural analysis of the composites were studied by Scanning electron microscope(SEM)and infrared spectroscopy instrument(IR).Due to the concept of group vibration infrared spectroscopy has the extensive application.Any kind of structural change such as addition or substitution of groups or atoms in a molecule may affect the relative mode of vibration of the group.This causes change in IR spectral band position,change in relative intensities and appearance of new bands and disappearance of any band and splitting of a single band into two or more bands.To increase the utility of fiber infrared spectroscopy can also be used.It deals with the interaction of infrared light with matter.The former can indicate the presence of functional groups qualitatively and the latter can provide a semi quantitative measure of their concentrations.On the other hand Electron Microscopy is most widely used to obtain information regarding the morphology of fiber surfaces,especially SEM(Scanning Electron Microscopy).Using SEM,it is easy to determine the differences of fiber surface topography after and before treatment,and hence the formation of fiber polymer composites.Fiber deboning was also observed for untreated and treated fiber pp matrix composite.The SEM can have a magnification range from a few times to several hundred thousand times.

Research Advances in Functional Constituents of Chickpea

Based on the generalization and summary of the research on the functional constituents of chickpea at home and abroad in recent years,the research advances in some rich functional constituents including isoflavones,proteins and peptides,carbohydrates,saponins and trace elements in chickpeas was reviewed in this paper. It provides a basis for the research,development and utilization of the functional constituents of chickpea in the future.

Preparation of polypropylene/montmorillonite nanocomposites by intercalative polymerization:Effect of in situ polymer matrix functionalization on the stability of the nanocomposite structure

The copolymerization of propylene and 5-hexenyl-9-borabicyclo[3.3.1]nonane (5-hexenyl-9-BBN) has been conducted with an MgCl2/TiCl4 catalyst intercalated in an organically modified montmorillonite (OMMT) with triethylaluminum (AlEt3) cocatalyst and diphenyldimethoxysilane (DDS) external donor. This polymerization process simultaneously results in both the exfoliation of MMT layers to realize the preparation of polypropylene (PP)/MMT nanocomposites and the implantation of reactive borane groups in the formed PP matrix. The polymer-borne borane groups have been able to undergo an effi-cient hydrolysis process under very mild reaction conditions (40℃, 3 h, in THF), introducing hydroxy groups into PP without sacrificing the polymerization-formed nanocomposite structure (the exfoliation of MMT). The resultant hydroxyl-functionalized PP/MMT nanocomposites exhibit enhanced structural stability against processing compared with those based on unfunctionalized PP matrix.

Therapeutic Effect of the Combination of Xiaoaiping Injection and Chemotherapy on Advanced Esophageal Cancer and Coagulation Function

Objective To observe the therapeutic effect of the combination of Xiaoaiping injection and chemotherapy on advanced esophageal cancer and coagulation function.Methods 100 patients with advanced esophageal carcer were randomly divided into control group and observation group,and each group had 50 cases.The control group was treated with TP chemotherapy,and the observation group,on the basis of the control group’s treatment,was treated with the Xiaoaiping injection,and treatment effects,Karnofsky,adverse drug reactions and INR changes before and after the treatment of the two groups were observed.Results After 2 periods of treatment,the local control rate of solid tumor,Karnofsky score,and stability in the observation group were significantly higher than those in the control group(p<0.05);and the plasma prothrombin time(PT),activated partial coagulation activity time(APTT)and thrombin time(TT)were significantly lower in the observation group than in the control group(p<0.05),and Fibrinogen(FIB)was significantly higher than the control group(p<0.05);and there was no statistically significant difference in the incidence of adverse reactions between the two groups(p>0.05).Conclusion:The therapeutic effect of the combination of Xiaoaiping Injection and chemotherapy on advanced esophageal cancer is obvious,and it can effectively improve the coagulation function,improve the quality of life,and be safe and reliable,so it's worth popularizing and application.

Influence on liver function of hepatic artery interventional chemoembolization combined reduced glutathione therapy for elderly patients with advanced liver cancer

Objective:To explore the influence on liver function of hepatic artery interventional chemoembolization combined reduced glutathione therapy for elderly patients with advanced liver cancer.Methods:A total of 120 cases of elderly patients with advanced liver cancer from digestive surgery in-patient department of our hospital during the period of January 2014 and January 2016 were selected as the research object, the patients were divided into two groups by using the random number table method,each for 60 cases.The control group were given conventional drugs chemotherapy, the study group were given hepatic artery interventional chemoembolization combined reduced glutathione therapy, serum liver function indexes of Direct Bilirubin(DBil), Total Bilirubin(TBil), Aspartate Transaminase(AST) and Alanineamino Transferase (ALT)were detected by using automatic biochemical analyzer. Results: The clinical remission rate of study group was significantly higher than the control group, the recurrence rate was obviously lower than the control group,compared between the two groups with statistically significant differences. The average survival time of study group (29.36±6.25) months, was significantly longer than the control group (18.02±4.16) months .Before the treatment, serum DBil, TBil, AST and ALT levels compared between the two groups with no statistically significant differences,after the treatment,the indexes of study group was significantly lower than the control group. The indexes levels compared between pre-therapy and post-therapy in study group with no statistically significant differences, while the indexes levels of post-therapy in the control group were significantly higher than those pre-therapy. Before the treatment, the life quality score compared between the two groups with no statistically significant differences, after treatment,the score of all patients were significantly higher than those pre-therapywhich the score of study group was significantly higher than the control group.The incidence rate of drug adverse reactions compared between the two groups with no statistically significant differences.Conclusion: The clinical efficacy of hepatic artery interventional chemoembolization combined reduced glutathione therapy for elderly patients with advanced liver cancer is satisfying, and helps to significantly improve liver function, improve life quality, it is worth popularization and application in the clinical practice.

Effect of kanglaite injection and docetaxel in treating advanced stage esophageal cancer on tumor markers, angiogenesis and immune function in elderly patients

Objective:To investigate the effect of Kanglaite injection combined with docetaxel in advanced esophageal cancer on tumor markers, angiogenesis and immune function in elderly patients.Method:A total of 130 patients with advanced esophageal cancer admitted in our hospital from October 2014 to July 2017were selected and divided into two groups according to the time of admission, 65 cases in each group, set as observation group and control group, all patients were treated with conventional radiotherapy (cisplatin combined with 5-fluorouracil), the observation group was given Kanglaite injection combined with docetaxel on the basis of this, while the control group only was given docetaxel treatment, the treatment period was 6 weeks, tumor markers, VEGF and immune function of both group after treatment were compared.Result: After treatment, the levels of carbohydrate antigen 125 (CA125), carbohydrate antigen 19-9 (CA19-9) and carcino-embryonic antigen (CEA) in the observation group were lower than those in the control group, the difference was statistically significant;VEGF level in the observation group after treatment was lower than the control group, the difference was statistically significant;After treatment, the levels of CD3+, CD4+ and CD4+/CD8+ in the observation group were higher than those in the control group, while the levels of CD8+ in the observation group was lower than those in the control group, the difference was statistically significant.Conclusion: Kanglaite injection combined with docetaxel in the treatment of elderly patients with advanced esophageal cancer is better, effectively reducing the level of tumor markers and vascular endothelial growth factor, improve immune function, it isworthy of clinical application.

Effects of Yiqi Gu Ben Decoction combined with DC chemotherapy on serum tumor markers, inflammatory factors and immune function in patients with locally advanced non-small cell lung cancer

Objective: To investigate the effects of Yiqi Gu decoction combined with DC chemotherapy on serum tumor markers, inflammatory factors and immune function in patients with locally advanced non-small cell lung cancer. Methods: A total of 95 patients with locally advanced non-small cell lung cancer were selected as the research objects, according to the random data table they were divided into control group (n=48) and observation group (n=47), patients in the control group were given DC chemotherapy, On the basis of this treatment, the patients in the observation group were given Yiqi Gu decoction treatment, Comparison of the levels of serum tumor markers [antigen (CEA) and carbohydrate antigen 19-9 (CA19-9)], inflammatory factor [C reactive protein (CRP) and tumor necrosis factor-α (TNF-α)] and immune function (CD3+, CD4+, CD8+, CD4+/CD8+)Results: Before treatment, there were no significant difference in the levels of CEA, CA19-9, CRP, TNF-α, CD3+, CD4+, CD8+, CD4+/CD8+ between the two groups;After treatment, the CEA, CA19-9, CRP, TNF-α, CD8+ levels of two groups were significantly lower than those in the same group before treatment, and the decreased range in observation group was significantly higher than the control group, moreover the levels after treatment were obviously lower than control group;After treatment, the levels of CD3+, CD4+, CD4+/CD8+ in the observation group were (64.72±5.25)% , (39.51±5.14)% and (1.35±0.27), which were significantly higher than the same group before treatment, and significantly higher than the control group [(58.57±5.09)%, (31.34±5.06)%, (1.14±0.33)], differences were statistically significant. Conclusion: DC chemotherapy combined with Yiqi Guben Decoction in the treatment of locally advanced non-small cell lung cancer, can effectively reduce the serum tumor marker levels, decrease inflammatory stress, improve immune function, has an important clinical value.

Effect of immunotherapy combined with intravenous chemotherapy on the tumor load,immune function and cancer cell proliferation activity in patients with advanced colon cancer

Objective: To study the effect of immunotherapy combined with intravenous chemotherapy on the tumor load, immune function and cancer cell proliferation activity in patients with advanced colon cancer. Methods: A total of 90 patients with advanced colon cancer who were treated in Second People's Hospital of Yibin between December 2014 and January 2017 were collected and divided into control group (n=45) and observation group (n=45) by random number table. Control group received routine intravenous chemotherapy, and the observation group received immunotherapy combined with intravenous chemotherapy. The levels of specific tumor markers and Th17/Treg cytokines in serum as well as proliferation gene expression in the lesion tissue were determined. Results: Before treatment, the differences in levels of specific tumor markers and Th17/Treg cytokines in serum as well as proliferation gene expression in lesion tissue were not statistically significant between the two groups. After treatment, PTN, CCSA-1, IL-17 and IL-23 levels in serum as well as GTPBP4 and PIK3CB mRNA expression in lesion tissue of both groups of patients were lower than those before treatment while IL-10 and IL-35 levels in serum as well as FAM96B, MS4A12 and FRAT1 mRNA expression in lesion tissue were higher than those before treatment, and PTN, CCSA-1, IL-17 and IL-23 levels in serum as well as GTPBP4 and PIK3CB mRNA expression in lesion tissue of observation group were lower than those of control group while IL-10 and IL-35 levels in serum as well as FAM96B, MS4A12 and FRAT1 mRNA expression in lesion tissue were higher than those of control group. Conclusion: Immunotherapy combined with intravenous chemotherapy can effectively reduce the tumor load, optimize cellular immune function and inhibit tumor cell proliferation in patients with advanced colon cancer.

Effect of Xiao Chaihu Tang combined with intravenous chemotherapy on tumor markers and immune function in patients with advanced breast cancer

Objective:To study the effect of Xiao Chaihu Tang combined with intravenous chemotherapy on tumor markers and immune function in patients with advanced breast cancer.Methods: 76 patients with advanced breast cancer treated in our hospital between May 2012 and November 2015 were collected and divided into the combined treatment group (n=34) who accepted Xiao Chaihu Tang combined with intravenous chemotherapy and the control group (n=42) who accepted intravenous chemotherapy alone according to different treatment, and the treatment cycle was 3 months for both groups. Before treatment and 3 months after treatment, ELISA method was used to detect serum levels of broad-spectrum tumor markers and breast cancer-specific tumor markers;flow cytometer was used to detect cellular immune function index levels, and turbidimetric immunoassay was used to detect humoral immune function index levels in peripheral blood.Results: Before treatment, differences in serum tumor marker levels as well as cellular immunity and humoral immunity index levels in peripheral blood were not statistically significant between two groups of patients (P>0.05);after 3 months of treatment, broad-spectrum tumor markers carcinoembryonic antigen (CEA), carbohydrate antigen 153 (CA153) and carbohydrate antigen 125 (CA125) levels in serum of combined treatment group were lower than those of control group, and breast cancer-specific tumor markers insulin-like growth factor-1 (IGF-1), midkine (MK), soluble E-cadherin (sEC) and thymidine kinase 1 (TK1) levels were lower than those of control group (P<0.05);CD3+ and CD4+ T lymphocyte levels as well as CD4+/CD8+ ratio in peripheral blood of combined treatment group were higher than those of control group while CD8+ T lymphocyte level was lower than that of control group, and immunoglobulin G (IgG), immunoglobulin A (IgA) and immunoglobulin M (IgM) levels in peripheral blood were higher than those of control group (P<0.05).Conclusions:Xiao Chaihu Tang combined with intravenous chemotherapy can decrease the severity of advanced breast cancer and optimize the body's immune function.

Recent advances in functional utilisation of environmentally friendly and recyclable high-performance green biocomposites: A review

Humans have relied on biomass for survival and development since the Stone Age. All aspects of human needs for materials are covered by tools, fuel, and buildings. Nowadays, metals and petroleum-based materials are widely used in highly developed industries. Unfortunately, environmental contamination and the loss of natural resources have led to the reemergence of biomass resources as efficient and sustainable energy sources. Notably, simple and direct applications can no longer meet the demand for functionalization, high performance of materials and construction materials. Therefore, it is imperative to modify biomass and combine its utilisation to produce functionalization and high performance materials. For example, construction materials with superior mechanical properties and water resistance can be produced by reinforcing fibres to facilitate crosslinking. Water-oil separation or adsorption effects of hydrogels and aerogels are determined by the porosity and lightness of biomass, biocomposite conductor is prepared by chimaeric conductive material. Here, we review the approaches that have been taken to devise an environmentally friendly yet fully recyclable and sustainable functionalised biocomposites from biomass and its potential directions for future research.

康复前移理念的心理干预对胃癌患者健康信念及心理弹性的影响

目的:探讨基于康复前移理念的心理干预对胃癌患者健康信念、心理弹性的影响。方法:选取2020年1月-2022年1月某院接受手术治疗的300例胃癌患者为研究对象,随机分为观察组、对照组,两组各150例患者。对照组给予常规护理干预,观察组在对照组的基础上给予基于康复前移理念的心理干预。评估并比较两组干预前后健康信念[Champion健康信念量表(CHBMS量表)]、健康行为[健康促进生活方式-Ⅱ量表(HPLP-II量表)]及心理弹性[心理弹性量表(CD-RISC量表)],比较胃肠道功能。结果:干预后,两组患者CHBMS量表中感知到易感性、严重性、障碍、益处以及自我效能、维护健康动机维度评分均高于干预前(P<0.05),且观察组高于对照组(t=6.629,16.616,11.918,14.665,9.557;P<0.05)。干预后,两组患者HPLP-II量表中人际关系、运动锻炼、自我实现、压力管理、健康责任及营养维度评分均高于干预前(P<0.05),且观察组高于对照组(t=9.745,11.325,5.067,12.945,22.330,14.690;P<0.05)。干预后,两组患者CD-RISC量表中坚韧、自强及乐观维度评分均高于干预前(P<0.05),且观察组高于对照组(t=14.328,7.242,6.640;P<0.05)。观察组患者肛门首次排气时间、首次进食时间、首次排便时间及住院时间均较对照组缩短(t=21.204,3.468,15.143,7.931;P<0.05)。结论:康复前移理念的心理干预有利于改善胃癌患者健康信念与健康行为,提升心理弹性,促进胃肠道功能恢复。

预测规则波浪中船舶运动和载荷的频域三维计算机程序

The development of an in-house computer program for determining the motions and loads of advancing ships through sea waves in the frequency domain,is described in this paper.The code is based on the potential flow formulation and originates from a double-body code enhanced with the regular part of the velocity potential computed using the pulsing source Green function.The code is fully developed in C++language with extensive use of the object-oriented paradigm.The code is capable of estimating the excitation and inertial radiation loads or arbitrary incoming wave frequencies and incidence angles.The hydrodynamic responses such as hydrodynamic coefficients,ship motions,the vertical shear force and the vertical bending moment are estimated.A benchmark container ship and an LNG carrier are selected for testing and validating the computer code.The obtained results are compared with the available experimental data which demonstrate the acceptable compliance for the zero speed whereas there are some discrepancies over the range of frequencies for the advancing ship in different heading angles.

Freeze-drying and hot-pressing strategy to embed two-dimensional Ti_(0.87)O_(2) monolayers in commercial polypropylene films with enhanced dielectric properties

The dielectric capacitor has been widely used in advanced electronic and electrical power systems due to its capability of ultrafast charging–discharging and ultrahigh power density.Nevertheless,its energy density is still limited by the low dielectric constant(≈2.2)of the commercial dielectric polypropylene(PP).The conventional enhancement strategy by embedding inorganic fillers in PP matrix is still difficult and challenging due to that PP hardly dissolves in any inorganic/organic solvent.In this work,we develop a new strategy including freeze-drying,surface functionalization,and hot-pressing to incorporate Ti_(0.87)O_(2) monolayers in PP film.A series of uniform composited Ti_(0.87)O_(2)@PP film has been successfully fabricated with Ti0.87O2 content range of 0–15 wt%.The maximum dielectric constant of the as-prepared Ti_(0.87)O_(2)@PP film is 3.27 when the Ti_(0.87)O_(2) content is 9 wt%,which is about 1.5 times higher than that of pure PP.Our study provides a feasible strategy to embed two-dimensional material into commercial PP thin-film with superior dielectric performance for practical application.