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Removal of siloxanes from biogas using acetylated silica gel as adsorbent 被引量:4
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作者 Yu-Heng Liu Ze-You Meng +2 位作者 Ji-Ye Wang Yan-Fei Dong Zi-Chuan Ma 《Petroleum Science》 SCIE CAS CSCD 2019年第4期920-928,共9页
Biogas can be used as an alternative energy source for producing heat and electricity;however, volatile methylsiloxanes(VOSiC) present in biogas can severely damage heat exchangers, turbines and gas engines. Consequen... Biogas can be used as an alternative energy source for producing heat and electricity;however, volatile methylsiloxanes(VOSiC) present in biogas can severely damage heat exchangers, turbines and gas engines. Consequently, e cient removal of VOSiC from biogas that is used as a biofuel is required. In this work, acetylated silica gel(Ac@SG) was synthesized,via treatment of microporous silica gel(SG) with acetic anhydride as an adsorbent, for removal of VOSiC from biogas,and characterized with XRD, SEM–EDS, N2-BET and FT-IR. This Ac@SG adsorbent exhibited a meso-/microporous structure and hydrophobic surface, indicating it was a more e cient adsorbent for removing hexamethyldisiloxane(L2) and octamethylcyclotetrasiloxane(D4) from biogas samples than conventional SG. It was found that the adsorption capacities of Ac@SG reached 304 mg L2/g for hexamethyldisiloxane and 916 mg D4/g for octamethylcyclotetrasiloxane at lower temperatures in the experimental range, and water had no significant e ect on its absorption e ciency. The used Ac@SG could be easily regenerated by heating it at 110 °C, and the adsorption capacity of recycled Ac@SG for hexamethyldisiloxane and octamethylcyclotetrasiloxane was kept constant in four recycle adsorption experiments. 展开更多
关键词 siloxaneS BIOGAS Acetylated SILICA GEL Adsorption REMOVAL of the siloxaneS
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Synthesis of a Novel Core-shell Type Acrylic-polyurethane Hybrid Emulsion Containing Siloxane and Fluorine as well as Water and the Oil Resistances of Cured Film 被引量:7
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作者 Jing CHAO Xing Yuan ZHANG Jia Bing DAI Zhen GE Lin Lin FENG 《Chinese Chemical Letters》 SCIE CAS CSCD 2006年第8期1121-1124,共4页
Siliconated polyurethane (Si-PU) was synthesized using isophorone diisocyanate (IPDI), hydroxybutyl-terminated polydimethylsiloxane (PDMS), polytetramethylene ether glycol (PTMG), polypropylene glycol (PPG),... Siliconated polyurethane (Si-PU) was synthesized using isophorone diisocyanate (IPDI), hydroxybutyl-terminated polydimethylsiloxane (PDMS), polytetramethylene ether glycol (PTMG), polypropylene glycol (PPG), 1,6-hexanediol (HDO), dimethylol propionic acid (DMPA) and triethylamine (TEA). Based on butyl acrylate (BA), 2, 2, 2-trifluoroethylmethacrylate (TFEMA) and Si-PU as a seed emulsion, a novel core-shell type acrylic-polyurethane hybrid emulsion, containing siloxane and fluorine (F-Si-PU), was prepared by seeded emulsion polymerization. The contents of siloxane and fluorine were determined according to the feed ratio. Fourier transform infrared spectroscopy (FTIR) was used to identify the chain structures of Si-PU and F-Si-PU. Investigation of transmission electron microscopy (TEM) confirmed the core-shell structure of F-Si-PU emulsion. Measurement results of water contact angle and the swelling ratio in water and n-octane for cured film showed that the water and the oil resistances for F-Si-PU had been significantly improved at a suitable content of fluorine and siloxane. 展开更多
关键词 CORE-SHELL siloxane FLUORINE acrylic-polyurethane water and oil resistance.
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Evaluation on Self-healing Mechanism and Hydrophobic Performance of Asphalt Modified by Siloxane and Polyurethane 被引量:4
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作者 ZHOU Xinxing XIAO Yue 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2019年第3期630-637,共8页
In order to inhibit and remove the thin ice and extend the lifetime of the damaged bridge, the self-healing mechanism and hydrophobic performance of asphalt modified by siloxane and polyurethane (ASP) were studied by ... In order to inhibit and remove the thin ice and extend the lifetime of the damaged bridge, the self-healing mechanism and hydrophobic performance of asphalt modified by siloxane and polyurethane (ASP) were studied by dynamic shear rheology (DSR), fluorescence microscope (FM), atomic force microscope (AFM), the fracture-healing-re-fracture test and molecular simulations. The experimental results indicated that the selfhealing capability of ASP increased with increasing heating time and temperature. Furthermore, the addition of siloxane could improve the reaction energy barrier and complex modulus, and it is believed that the self-healing is a viscosity driven process, consisting of two parts namely crack closure and properties recovery. Contact angle of ASP increased with the increasing siloxane content and it deduced that the siloxane could improve the hydrophobic performance of ASP and the ASP molecule model could simulate well the self-healing mechanism and hydrophobic performance of ASP. 展开更多
关键词 HYDROPHOBIC ASPHALT SELF-HEALING MECHANISM molecule model siloxane and POLYURETHANE dynamic shear rheology atomic force microscope
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Investigation on poly[(methylsilylene ethynylene phenylene ethynylene)-co-(tetramethyldisiloxane ethynylene phenylene ethynylene)] 被引量:3
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作者 Fei Gao Ling Ling Zhang +1 位作者 Fa Rong Huang Lei Du 《Chinese Chemical Letters》 SCIE CAS CSCD 2010年第6期738-742,共5页
Poly[(methylsilylene ethynylene phenylene ethynylene)-co-(tetramethyldisiloxane ethynylene phenylene ethynylene)]was synthesized by polycondensation reaction of m-diethynylbenzene magnesium reagent with 1,3-dichlorote... Poly[(methylsilylene ethynylene phenylene ethynylene)-co-(tetramethyldisiloxane ethynylene phenylene ethynylene)]was synthesized by polycondensation reaction of m-diethynylbenzene magnesium reagent with 1,3-dichlorotetramethyldisiloxane and dichloromethylsilane.The copolymer was characterized by FT-IR,~1H NMR,differential scanning calorimetry and thermogravimetric analysis.The results show that the copolymer exhibits good processability and cures at low temperatures.The cured copolymer shows high thermal stability. 展开更多
关键词 Silicon-containing arylacetylene resin siloxane m-Diethynylbenzene Methylsilylene
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STUDY ON SEGMENTED POLYURETHANE WITH MIXED SOFT SEGMENTS OF POLYCHLOROMETHYL METHYL SILOXANE AND POLYTETRAMETHYLENE OXIDE 被引量:2
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作者 蒋锡群 杨昌正 余学海 《Chinese Journal of Polymer Science》 SCIE CAS CSCD 1994年第3期228-236,共9页
Two series of polyurethanes based on mixed polychloromethyl methyl siloxane and poly-tetramethylene oxide in different weight fractions were synthesized. The phase separation ofsamples was studied using DSC and dynami... Two series of polyurethanes based on mixed polychloromethyl methyl siloxane and poly-tetramethylene oxide in different weight fractions were synthesized. The phase separation ofsamples was studied using DSC and dynamic mechanical property analysis. The results showedthat the introduction of chloromethyl group into polysiloxane increased its polarity and henceimproved the miscibilities with polytetramethylene oxide and polyurethane hard segment.Particularly, in the case of N-methyldiethanolamine extended materials, the surface and tensileproperties of these samples can be adjusted by various ratios of two soft segments. 展开更多
关键词 Mixed soft segments Polychloromethyl methyl siloxane POLYURETHANE Micro-phase separation
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Synthesis and properties of acrylate latex modified by vinyl alkoxy siloxane 被引量:9
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作者 张心亚 孙志娟 +3 位作者 黄洪 黎永津 蓝仁华 陈焕钦 《Journal of Central South University of Technology》 EI 2007年第5期666-672,共7页
Acrylate latex modified by vinyl triisopropoxy silane (C-1706) was synthesized by seeded emulsion polymerization with anionic emulsifier sodium dodecyl sulphonate(SDS) and nonionic emulsifier OP-10 as the multiple emu... Acrylate latex modified by vinyl triisopropoxy silane (C-1706) was synthesized by seeded emulsion polymerization with anionic emulsifier sodium dodecyl sulphonate(SDS) and nonionic emulsifier OP-10 as the multiple emulsifiers at (78±2) ℃. The effects of different factors, such as the emulsifier, C-1706 monomer and its feeding manner on the properties of acrylate latex modified by C-1706 were investigated. The particle size distribution and the structure, the configuration, the weather durability and stain resistance of copolymer latex were characterized by particle size analyzer, Fourier transform infrared spectroscopy (FT-IR), transmission electron microscope(TEM), scanning electron microscope(SEM) and ultraviolet aging instrument respectively. The results show that SDS to OP-10 as multiple emulsifiers can lead to coordinated efficiency, the optimal emulsifier dosage is 2.4%?3.2%(mass fraction), and the mass ratio of SDS to OP-10 is 1?1? 1?2. The seeded emulsion polymerization can effectively introduce a organic-siloxane bonding in a macromolecule inter polymer, and the obtained acrylate latex modified by organic-siloxane possesses narrow distribution of particle size with mean diameter of 51.8?76.6 nm and has the excellent properties in weather durability and stain-resistance especially. 展开更多
关键词 vinyl alkoxy siloxane acrylate latex emulsion polymerization SYNTHESIS characterization
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Synthesis of Bioactive Gelatin-siloxane Hybrids for Bone Tissue Engineering and Evaluation of Its Drug Release Behaviors in vitro 被引量:1
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作者 于冰 任磊 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2005年第B12期105-107,共3页
Porous and bioactive gentamicin sulfate-loaded gelatin-siloxane hybrids were successfidly synthesized by using a combined sol-gel processing, post-gelation soaking, and freeze-drying process. A bone-like apatite layer... Porous and bioactive gentamicin sulfate-loaded gelatin-siloxane hybrids were successfidly synthesized by using a combined sol-gel processing, post-gelation soaking, and freeze-drying process. A bone-like apatite layer was able to form in the Ca^2+-containing porous gentamicin-loaded hybrids upon soaking in a simu- lazed body fluid (SBF) up to 1 day. The drug release of gentamicin sulfate was with a burst, followed by an almost constant release up to 7 days. And the rate of release in acidic medium was lower than that in the neutral and basic media. 展开更多
关键词 GELATIN siloxane tissue engineering bioactivity drug delivery
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Thermal and Optical Properties of Epoxy/Siloxane Hybrimer Based on Sol-Gel-Derived Phenyl-Siloxane 被引量:5
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作者 Kuo-Hui Wu Ken-Fa Cheng +2 位作者 Cheng-Chien Yang Chung-Pao Wang Chi-I Liu 《Open Journal of Composite Materials》 2015年第3期49-59,共11页
A hybrimer based on epoxy resin and phenyl-siloxane was prepared by polymerization and a solgel condensation reaction in which Eporite-904 (807 g/eq) bisphenol-A-type epoxy resin, 3-isocyanatopropyltriethoxysilane (IP... A hybrimer based on epoxy resin and phenyl-siloxane was prepared by polymerization and a solgel condensation reaction in which Eporite-904 (807 g/eq) bisphenol-A-type epoxy resin, 3-isocyanatopropyltriethoxysilane (IPTES) and phenyltriethoxysilane (PTEOS) acted as precursors. The thermal and optical properties of the epoxy/siloxane hybrimer were studied. The thermogravimetric analysis (TGA) results implied that the hybrimer could increase the crosslink density and enhance the thermal properties. The optical properties were measured after thermal and UV aging. The refractive indexes of the epoxy/siloxane hybrimers were 1.66 - 1.70, and the transmittances of the cured hybrimers were above 90% in the visible wavelength. After a 120°C/24-h thermal aging test, the decreases in the refractive index and transmittance were less than 5% and 20% respectively. The epoxy/siloxane hybrimers also showed low discoloration upon thermal aging at 120°C for 24 h under an air atmosphere. 展开更多
关键词 EPOXY siloxane Encapsulating Material OPTICAL Properties
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PREPARATION OF NANOMETER TiO_2 ORGANIC SOLUTION——EFFECT OF ORGANIC SILOXANE ON SOL PROPERTIES 被引量:1
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作者 吴壁耀 《Chinese Journal of Polymer Science》 SCIE CAS CSCD 2004年第3期247-251,共5页
A homogeneous longtime stabilized transparent nanometer TiO2 organic solution was obtained by means of the simultaneous hydrolysis and co-polycodensation of tetrabutyltitanate (TBT) and methacryloxypropyltrimethoxysil... A homogeneous longtime stabilized transparent nanometer TiO2 organic solution was obtained by means of the simultaneous hydrolysis and co-polycodensation of tetrabutyltitanate (TBT) and methacryloxypropyltrimethoxysilane (MAPTMS) by the sol-gel process. The particle size of nanometer titanium dioxide was controlled by use of bifunctional silanes, such as diphenyldimethoxysilane (DPDMS), diphenyldiethoxysilane (DPDES) and dimethyldiethoxysilane (DMDES). The effect of TiO2 content in the solution on the refractive index of system was discussed in detail. The result shows that the refractive index of solution increases linearly with TiO2 content. The refractive index of the three hybrid nanometer materials attained 1.6053, 1.5846 and 1.5346, respectively. The size of nanometer particles was characterized by TEM and the particle diameter thus obtained is in the range of 20-90 nm. FT-IR spectra of the materials show that the Ti— O—Si bond is formed. 展开更多
关键词 Nanometer titanium dioxide Tetrabutyltitanate Refractive index Hybrid materials siloxane
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Preparation of Rare Earth Doped Alumina Siloxane Gel and Its ER Effect 被引量:1
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作者 李幼荣 张明 +3 位作者 周兰香 邱关明 井上真一 冈本宏 《Journal of Rare Earths》 SCIE EI CAS CSCD 2002年第5期483-491,共9页
Poly(methyl methacrylate) (PMMA) was used to wrap alumina siloxane sol through emulsion polymerization. A kind of suspensions with notable ER effect was produced by fully mixing the prepared microcapsule with silicon... Poly(methyl methacrylate) (PMMA) was used to wrap alumina siloxane sol through emulsion polymerization. A kind of suspensions with notable ER effect was produced by fully mixing the prepared microcapsule with silicon oil. Meanwhile a series of PMMA wrapped alumina-siloxane gel doped with rare earths was obtained and its ER effect was tested, like viscosity of different rare earth ion doped samples in different powder concentrations and at different temperatures, at the same time, leak current density and dielectric constant were measured. Results show that the ER effect of this suspension is remarkable, and its stability is much better. The condition of emulsion polymerization and the mechanism of effect are discussed. 展开更多
关键词 rare earths ER effect alumina siloxane gel VISCOSITY electric field strength emulsion polymerization
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Synthesis of 1,1,3,3,5,5-hexamethyl-1,5-bis[(3-ethyl-3-methoxyoxetane)propyl]trisiloxane and Research on Its UV-curing Performance 被引量:1
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作者 HU Siwei HUANG Biwu CHEN Weiqing 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2021年第6期942-948,共7页
A compound,3-ethyl-3-hydroxymethyloxetane(EHO),was synthesized with diethyl carbonate and trihydroxypropane as raw materials,3-ethyl-3-allylmethoxy oxetane(EAMO)was synthesized with EHO and allyl bromide,and 1,1,3,3,5... A compound,3-ethyl-3-hydroxymethyloxetane(EHO),was synthesized with diethyl carbonate and trihydroxypropane as raw materials,3-ethyl-3-allylmethoxy oxetane(EAMO)was synthesized with EHO and allyl bromide,and 1,1,3,3,5,5-hexamethyl-1,5-bis[(3-ethyl-3-methoxyoxetane)propyl]trisiloxane(HMBEMOPTS)was synthesized with EAMO and 1,1,3,3,5,5-hexamethyltrisiloxane(HMTS).HMBEMOPTS is a novel UV-curable oligomer.The test of photo-DSC shows the photosensitivity of HMBEMOPTS is better than the ordinary oxetane,3-ethyl-3-[(3-ethyloxetan-3-yl)methoxymethyl]oxetane.HMBEMOPTS was mixed with bisphenol A type epoxy resin E-51 to prepare a cationic UV-curable system,and triarylsulfonium hexafluoroantimonate(UV-6976)was used as a cationic photoinitiator.The mechanical tests of coating films prove that when the mass fraction of HMBEMOPTS is 50%,the mechanical properties of the curing system are the best.The impact strength of the UV-curable films is measured to be 40 kg·cm and the flexibility is 2 mm;the tensile strength and flexural strength of the prepared specimens are 20.74 MPa and 13.43 MPa,respectively.The experimental results show that HMBEMOPTS can effectively improve photosensitivity and flexibility of the photosensitive resin. 展开更多
关键词 OXETANE siloxane photosensitive resin
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Synthesis of anew siloxane-containing diamine and related polyimide 被引量:1
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作者 Yu Shao Yan Feng Li +2 位作者 Xiao Long Wang Jin Shan Guo Xin Zhao 《Chinese Chemical Letters》 SCIE CAS CSCD 2007年第6期762-763,共2页
A novel siloxane-containing diamine, bis[4-(p-aminophenoxy)phenoxy]dimethylsilane (APPMS), was successfully synthesized in three steps using hydroquinone as starting material, which was reacted with 4,4′-oxydiphthali... A novel siloxane-containing diamine, bis[4-(p-aminophenoxy)phenoxy]dimethylsilane (APPMS), was successfully synthesized in three steps using hydroquinone as starting material, which was reacted with 4,4′-oxydiphthalic anhydride (ODPA) via a conventional two-step thermal or chemical imidization method to produce a new siloxane-containing polyimide. The resulting polyimide exhibited excellent solubility, and film-forming capability. 展开更多
关键词 POLYIMIDE siloxane-containing diamine SOLUBILITY
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SYNTHESIS OF POLY(SILPHENYLENE-SILOXANE) THROUGH DEHYDROCARBON POLYCONDENSATION OF 1,4-BIS(DIMETHYLSILYL)BENZENE AND DIALKOXYSILANE 被引量:2
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作者 陈循军 《Chinese Journal of Polymer Science》 SCIE CAS CSCD 2008年第4期481-487,共7页
Poly(silphenylene-siloxane)s had been synthesized through dehydrocarbon polycondensation of 1,4- bis(dimethylsilyl)benzene(BDSB)and dialkoxysilane.The polymer composition and structure was characterized by ^(29)Si-NMR... Poly(silphenylene-siloxane)s had been synthesized through dehydrocarbon polycondensation of 1,4- bis(dimethylsilyl)benzene(BDSB)and dialkoxysilane.The polymer composition and structure was characterized by ^(29)Si-NMR.The influence of temperature,B(C_6F_5)_3 concentration and monomer structure on the composition and the microstructure of the copolymers were investigated.It shows that elevating reaction temperature or using substrate (R O)_2R_2R_1Si with bulk organic group of R_1 or R_2 augments the run numb... 展开更多
关键词 Poly(silphenylene-siloxane Tris(pentafluoropheyl)boron Dehydrocarbon polycondensation
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Electrical Properties and Micro-structures of Water-tree Aged XLPE Cables After Siloxane Fluid Injection 被引量:4
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作者 ZHOU Kai XIONG Qing ZHAO Wei WEN Weijie TAO Wenbiao 《高电压技术》 EI CAS CSCD 北大核心 2015年第8期2657-2664,共8页
关键词 XLPE电缆 水树老化 电气特性 微结构 交联聚乙烯 硅油 加速老化试验 扫描电镜
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Preparation and Structure Characterization of Rare Earth Doped Alumina-Siloxane Gel and Its Modification on ER Effect 被引量:2
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作者 邱关明 张明 +3 位作者 李幼荣 陆磊 陈海燕 Hiroshi Okamoto 《Journal of Rare Earths》 SCIE EI CAS CSCD 2004年第2期249-253,共5页
A series of samples of alumina-siloxane gel wrapped by poly (methyl methacrylate) and doped with rare earths such as lanthanum, praseodymium, yttrium, gadolinium and europium were prepared. The structure features were... A series of samples of alumina-siloxane gel wrapped by poly (methyl methacrylate) and doped with rare earths such as lanthanum, praseodymium, yttrium, gadolinium and europium were prepared. The structure features were characterized by micrograph, X-ray fluorescence spectrum, X-ray diffraction spectrum, Fourier transform infrared spectrum and differential thermal analysis. Tests indicate that rare earths modify the electrorheological effects of the stable suspensions composed of samples stirred with silicon oil. 展开更多
关键词 organic macromolecular material alumina-siloxane gel ER effect VISCOSITY rare earths
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Fatigue Resistance of Filled NR with PMMA-Wrapped and Rare Earth-Doped Alumina-Siloxane Gel 被引量:2
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作者 张明 邱关明 +3 位作者 周兰香 陈海燕 Inoue Shinich OKAMOTO Hiroshi 《Journal of Rare Earths》 SCIE EI CAS CSCD 2002年第4期278-281,共4页
Poly (methyl methacrylate) (PMMA) was used to wrap alumina-siloxane sol which was produced by water glass, aluminum nitrate and α-methacrylic acid, and as a result, alumina-siloxane gel wrapped by PMMA was obtained. ... Poly (methyl methacrylate) (PMMA) was used to wrap alumina-siloxane sol which was produced by water glass, aluminum nitrate and α-methacrylic acid, and as a result, alumina-siloxane gel wrapped by PMMA was obtained. Meanwhile, rare earth ions were employed to dope in the course of reaction, and the formed rare earth doped PMMA microcapsule powder was filled into natural rubber (NR). It is found through the analysis of mechanical properties that Young′s modulus universally improves and a remarkable resistance to fatigue is displayed. Retention rate of tensile strength is twice that of the controlled sample after ten thousand times of extension fatigue. 展开更多
关键词 rare earths alumina-siloxane sol natural rubber(NR) mechanical properties resistance to fatigue
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ER Effect of PMMA Wrapped Alumina-Siloxane Gel Doped with Rare Earths
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作者 邱关明 周兰香 +2 位作者 张明 李幼荣 严长浩 《Journal of Rare Earths》 SCIE EI CAS CSCD 2002年第1期23-27,共5页
PMMA wrapped alumina siloxane gel was obtained by using poly (methyl methacrylate) (PMMA) to wrap alumina siloxane sol which was made from water glass, aluminum nitrate and α methacrylic acid. Meanwhile, rare eart... PMMA wrapped alumina siloxane gel was obtained by using poly (methyl methacrylate) (PMMA) to wrap alumina siloxane sol which was made from water glass, aluminum nitrate and α methacrylic acid. Meanwhile, rare earth ions were used to dope in the course of reaction, and stable suspensions was produced by putting PMMA wrapped microcapsule powder doped with rare earths into methy silicon oil. It is found that its electrorheological (ER) effect improves strikingly after loading electric field. At a certain concentration, the immediate viscosity increases from 95 to 178 Pa·s compared to the system without doping. 展开更多
关键词 rare earths water glass PMMA wrapped alumina siloxane gel SUSPENSIONS electrorheological effect
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SHEAR WAVE ATTENUATION IN POLY (DIMETHYL SILOXANE) (PDMS)
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作者 王克俭 周持兴 +1 位作者 赵玫 韩雪华 《Journal of Shanghai Jiaotong university(Science)》 EI 2001年第1期6-9,共4页
A valid experimental setup was proposed to study the wave transfer in PDMS fluids. It is found that the degree of attenuation in strain rate is greater with the increasing fluid viscosity, increasing vibration frequen... A valid experimental setup was proposed to study the wave transfer in PDMS fluids. It is found that the degree of attenuation in strain rate is greater with the increasing fluid viscosity, increasing vibration frequency, and increasing wave traveled distance. 展开更多
关键词 ATTENUATION shear wave EXCITATION response poly (dimethyl siloxane) fluid
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SINGLE-ION CONDUCTIVITY IN POLY (LITHIUM PROPIONATE METHYL SILOXANE)
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作者 方世壁 马延光 +4 位作者 郭德凡 李永军 江英彦 黄学杰 陈立泉 《Chinese Journal of Polymer Science》 SCIE CAS CSCD 1993年第2期171-177,共7页
Poly(lithium propionate methyl siloxane )as a single-ion carrier source was synthesized. The crosslinked film showed lower lithium ionic conductivity at room temperature (about 10^(-10) S/cm). However,the lithium ioni... Poly(lithium propionate methyl siloxane )as a single-ion carrier source was synthesized. The crosslinked film showed lower lithium ionic conductivity at room temperature (about 10^(-10) S/cm). However,the lithium ionic conductivity was obviously increased by blending with high polar polymers such as polyethylene oxide, poly (methylsiloxane - co- ethylene oxide) and poly (methylsiloxane- g- ethylene oxide). In the blend system a high conductivity of 10^(-7)-10^(-5) Scm^(-1) at room temperature was obtained and the single-ion conductivity was deeply influenced by the content of the poly (lithium propionate methyl siioxane). The dc ionic conductivity of the flexible crosslinked films is more stable over time. 展开更多
关键词 Single-ion conductor Polysiloxane derivatives poly( lithium propionate methyl siloxane )
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Structure and Properties of Silk Fibers Grafted with Vinyl Siloxane Monomer
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作者 邢铁玲 陈国强 《Journal of Donghua University(English Edition)》 EI CAS 2006年第1期94-97,共4页
Silk fibers were grafted with a novel vinyl siloxane monomer. The properties of silk with different grafting yield were discussed. The results showed that the crease recovery of grafted silk fabric is improved signifi... Silk fibers were grafted with a novel vinyl siloxane monomer. The properties of silk with different grafting yield were discussed. The results showed that the crease recovery of grafted silk fabric is improved significantly, handle of grafted silk is softer, and grafting has no influence on strength of silk. Graft with low grafting yield has no effect on dyeing properties of silk. The results of IR, SEM photographs and amino acid analysis indicate that the monomer combines with silk fiber by physical sediment and chemical bond, the grafting reactions mainly occurred on Ser., His. and Arg. of silk fibers, and ester crosslinking forms between silanol and Asp., Gin. of silk molecular side chains. X-ray diffraction patterns of silk fibers suggest that the grafting has no effect on the crystalline regions. 展开更多
关键词 SILK vinyl monomer siloxane GRAFTING MODIFICATION structure.
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