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Advanced hemocompatible polyethersulfone composite artificial lung membrane with efficient CO_(2)/O_(2)exchange channel constructed by modified carbon nanotubes network
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作者 Yunbo Feng Qian Wang +2 位作者 Shudong Sun Weifeng Zhao Changsheng Zhao 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2023年第29期181-193,共13页
Artificial lung membranes as the core module of the extracorporeal membrane oxygenation technology(ECMO)execute the function of extracorporeal blood-gas barrier accomplishing CO_(2)/O_(2)exchange with blood.However,th... Artificial lung membranes as the core module of the extracorporeal membrane oxygenation technology(ECMO)execute the function of extracorporeal blood-gas barrier accomplishing CO_(2)/O_(2)exchange with blood.However,the unsatisfactory hemocompatibility and difficulty in functionalization are the promi-nent challenges faced by current artificial lung membrane materials.In this study,polyethersulfone(PES)composite membranes with self-anticoagulant property and high gas exchange efficient are fabricated by blending PES matrix with poly(vinylamine)(PVAm)modified carboxylic carbon nanotubes(mCNTs)and citrate-based poly(octamethylene-citrate)(POC)pre-polymers.The mCNTs construct specific gas transfer channels within the composite membranes to enhance the gas permeability,while the POC pre-polymers provide anticoagulant property based on the chelation to blood Ca^(2+)and the inactivation effect to in-trinsic coagulation factors.Importantly,directed by the actual ECMO gas exchange mode,we design a gas-liquid convectional circulation device that could evaluate gas exchange efficiency for the composite membranes under mimetic ECMO state.Therefore,this strategy not only proposes a new design method of advanced artificial lung membranes to solve the practical challenges in the current ECMO technology,but also establishes a scientific testing method to evaluate the gas exchange performance for new-type artificial lung membrane materials in the future. 展开更多
关键词 Composite membrane material modified carbon nanotubes Artificial lung membranes Hemocompatibility Gas exchange
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Anthraquinone Covalently Modified Carbon Nanotubes for Efficient and Steady Electrocatalytic H2O2 Generation 被引量:2
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作者 YU Fangyuan WANG Kai +6 位作者 WANG Chuan HE Xinxia LIAO Yang ZHAO Shilin MAO Hui LI Xiaoting MA Jun 《Chemical Research in Chinese Universities》 SCIE CAS CSCD 2020年第6期1332-1338,共7页
Anthraquinone(AQ)modified carbon materials could be endowed with significantly improved oxygen re-duction reaction(ORR)activity.However,the application of these materials in the generation of hydrogen peroxide(H2O2)ha... Anthraquinone(AQ)modified carbon materials could be endowed with significantly improved oxygen re-duction reaction(ORR)activity.However,the application of these materials in the generation of hydrogen peroxide(H2O2)has been rarely investigated.For this motivation,AQ covalently modified carbon nanotube(AQ-CNT)was pur-posely synthesized for H2O2 generation.It was found that the cumulative H2O2 concentration reached up to 187.18 mg(Lh)over AQ(40)-CNT catalyst,nearly 2.0 times higher than that over CNT,and being superior to those over most carbon materials reported.The enhanced activity stemmed from the improved mass transfer fficiency of oxygen and the enhanced electrocatalytic activity.Noteworthily,the AQ(40)-CNT material exhibited satisfactory stability for H2O2 generation,which was ascribed to the strong interaction force of C-N covalent bond.The present work could provide a vital idea for designing electrode material with simultancously improved activity and stability for H2O2 gencration. 展开更多
关键词 ANTHRAQUINONE Covalently modified carbon nanotube Oxygen reduction reaction Generation of hydrogen peroxide
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Study of enzyme biosensor based on carbon nanotubes modified electrode for detection of pesticides residue 被引量:8
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作者 Shu Ping Zhang Lian Gang Shan +3 位作者 Zhen Ran Tian Yi Zheng Li Yi Shi Deng Song Zhang 《Chinese Chemical Letters》 SCIE CAS CSCD 2008年第5期592-594,共3页
The paper describes a controllable layer-by-layer (LBL) self-assembly modification technique of multi-walled carbon nanotubes (MWNTs) and poly(diallyldimethylammonium chloride) (PDDA) towards glassy carbon ele... The paper describes a controllable layer-by-layer (LBL) self-assembly modification technique of multi-walled carbon nanotubes (MWNTs) and poly(diallyldimethylammonium chloride) (PDDA) towards glassy carbon electrode (GCE), Acetylcholinesterase (ACHE) was immobilized directly to the modified GCE by LBL self-assembly method, the activity value of AChE was detected by using i-t technique based on the modified Ellman method. Then the composition of carbaryl were detected by the enzyme electrode with 0.01U activity value and the detection limit of carbaryl is 10^- 12 g L ^-1 so the enzyme biosensor showed good properties for pesticides residue detection. 展开更多
关键词 ACETYLCHOLINESTERASE carbon nanotubes modified electrode Layer-by-layer self-assembly IMMOBILIZATION
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Glassy carbon electrode modified with multi-walled carbon nanotubes sensor for the quantihication of antihistamine drug pheniramine in solubilized systems 被引量:1
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作者 Rajeev Jain Sanjay Sharma 《Journal of Pharmaceutical Analysis》 SCIE CAS 2012年第1期56-61,共6页
A sensitive electroanalytical method for quantification of pheniramine in pharmaceutical formulation has been investigated on the basis of the enhanced electrochemical response at glassy carbon electrode modified with... A sensitive electroanalytical method for quantification of pheniramine in pharmaceutical formulation has been investigated on the basis of the enhanced electrochemical response at glassy carbon electrode modified with multi-walled carbon nanotubes in the presence of sodium lauryl sulfate.The experimental results suggest that the phcniramine in anionic surfactant solution exhibits electrocatalytic effect resulting in a marked enhancement of the peak current response.Peak current response is linearly dependent on the concentration of pheniramine in the range 200-1500 μg/mL with correlation coefficient 0.9987.The limit of detection is 58.31 μg/m L.The modified electrode shows good sensitivity and repeatability. 展开更多
关键词 PHENIRAMINE Sodium lauryl sulfate (SLS) Glassy carbon electrode modified with multi-walled carbon nanotubes (GCE-MWCNTs) Solubilized systems Voltammetric quantification
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Effects of temperature change on the rheological property of modified multiwall carbon nanotubes
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作者 Weipeng HU Zhen WANG +3 位作者 Yulu HUAI Xiqiao FENG Wenqi SONG Zichen DENG 《Applied Mathematics and Mechanics(English Edition)》 SCIE EI CSCD 2022年第10期1503-1514,共12页
Solvent-free nanofluids hold promise for many technologically significant applications.The liquid-like behavior,a typical rheological property of solvent-free nanofluids,has aroused considerable interests.However,ther... Solvent-free nanofluids hold promise for many technologically significant applications.The liquid-like behavior,a typical rheological property of solvent-free nanofluids,has aroused considerable interests.However,there has been still lack of efficient methods to predict and control the liquid-like behavior of solvent-free nanofluids.In this paper,we propose a semi-discrete dynamic system with stochastic excitation describing the temperature change effects on the rheological property of multiwall carbon nanotubes(MWCNTs)modified by grafting sulfonic acid terminated organosilanes as corona and tertiary amine as canopy,which is a typical covalent-type solvent-free nanofluid system.The vibration of the grafting branches is simulated by employing a structure-preserving approach,and the shear force of grafting branches at the fixed end is computed subsequently.By taking the shear forces as an excitation acting on the MWCNTs,the axial motion of the MWCNTs is solved with the 7-point Gauss-Kronrod quadrature rule.The critical temperature associated with the appearance of the liquid-like behavior as well as the upper bound of the moving speed of the modified MWCNTs is determined,which can be used to predict and control the liquid-like behavior of the modified MWCNTs in engineering applications. 展开更多
关键词 covalent-type solvent-free nanofluid rheological property temperature change modified multiwall carbon nanotube(MWCNT) generalized stochastic multisymplectic method
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Electroanalytical method for determination of shikonin based on the enhancement effect of cyclodextrin functionalized carbon nanotubes 被引量:5
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作者 Yan-Sha Gao Li-Ping Wu +4 位作者 Kai-Xin Zhang Jing-Kun Xu Li-Min Lu Xiao-Fei Zhu Yao Wu 《Chinese Chemical Letters》 SCIE CAS CSCD 2015年第5期613-618,共6页
A simple and sensitive electroanalytical method for determination of shikonin, a widely used antitumoral agent, using β-cyclodextrin-functionalized multiwalled carbon nanotubes composite modified glassy carbon electr... A simple and sensitive electroanalytical method for determination of shikonin, a widely used antitumoral agent, using β-cyclodextrin-functionalized multiwalled carbon nanotubes composite modified glassy carbon electrodes (MWCNTs/β-CD/GCE) was presented. CDs are water-soluble and environmentally friendly and can improve the dispersibility of MWCNTs/βCD functional materials, which was confirmed by SEM. The electrochemical behaviors of shikonin on different electrodes were investigated by cyclic voltammetry (CV) and differential pulse voltammograms (DPVs). The results demonstrated that the redox peak currents of shikonin obtained at MWCNTs/fl-CD/GCE were much higher than those at the βCD/GCE and MWCNTs/GCE, which can be attributed to the combination of the excellent electrocatalytic properties of MWCNTs and the molecular recognition ability of βCD. At MWCNTs/ βCD/GCE, the response current exhibits a linear range from 5.0 nmol/L to 10.0 μmol/L with a detection limit of 1.0nmol/L (S/N=3). As a practical application, the proposed method was applied to quantitatively determine shikoninin urine samples with satisfying results. 展开更多
关键词 Shikonin β-Cyclodextrin Multiwalied carbon nanotubes modified electrode Electrochemical detection
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Forced vibration analysis of nano-composite rotating pressurized microbeam reinforced by CNTs based on MCST with temperature-variable material properties 被引量:1
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作者 R.Rostami M.Mohammadimehr +1 位作者 M.Ghannad A.Jalali 《Theoretical & Applied Mechanics Letters》 CAS CSCD 2018年第2期97-108,共12页
In this study, free and forced vibration analysis of nano-composite rotating pressurized microbeam reinforced by carbon nanotubes (CNTs) under magnetic field based on modify couple stress theory (MCST) with temper... In this study, free and forced vibration analysis of nano-composite rotating pressurized microbeam reinforced by carbon nanotubes (CNTs) under magnetic field based on modify couple stress theory (MCST) with temperature-variable material propertiesis presented. Also, the boundary conditions at two ends of nano-composite rotating pressurized microbeam reinforced by CNTs are considered as simply supported. The governing equations are obtained based on the Hamilton's principle and then computed these equations by using Navier's solution. The magnetic field is inserted in the thickness direction of the nano-composite microbeam. The effects of various parameters such as angular velocity, temperature changes, and pressure between of the inside and outside, the magnetic field, material length scale parameter, and volume fraction of nanocomposite microbeam on the natural frequency and response systemare studied. The results show that with increasing volume fraction of nano-composite microbeam, thickness, material length scale parameter, and magnetic fields, the natural frequency increases. The results of this research can be used for optimization of micro-structures and manufacturing sensors, displacement fluid, and drug delivery. 展开更多
关键词 Forced vibration analysis Nano-composite rotating pressurized microbeam carbon nanotubes Modify couple stress theory Temperature-variable material properties
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