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Progress in Natural Science:Materials International 2012年第3期22卷 250-257页

作者： Haolong Bai, Xuan Wang, Yitong Zhou, Liping Zhang College of Material Science and Technology, Beijing Forestry University, Beijing 100083, China College of Material Science and Technology Beijing Forestry University Beijing 100083 China

Poly(vinylidene fluoride) (PVDF) composite membranes blended with nano-crystalline cellulose (NCC) for ultrafiltration were prepared by a Loeb-Sourirajan (L-S) phase inversion process. The effects of NCC concentration on the membrane performances were investigated. Surface chemical compositions, surface and cross-section morphologies, degree of crystallinity and the thermal stability of the membranes were characterized by Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), X-ray diffraction (XRD) and thermal gravimetric analysis (TGA) respectively. The mechanical properties of the membranes were also investigated. All the experimental results indicated that the properties of the composite membranes were improved due to the addition of NCC. The pure water flux of composite membranes can reach 230.8 L/(m2 h) and increase up to 47.5% compared with pure PVDF membranes. At the same time, the rejection ratio of a bovine serum albumin solution (1 g/L) was up to 92.5%. The porosity and the mean pore size of the composite membranes were 65% and 49 nm, respectively. Due to the addition of NCC, the degree of crystallinity was increased to 52.1% resulting in the enhanced mechanical properties. A typical asymmetric structure, which was composed of sponge-like dense layer and finger-like microporous support layer, was observed in SEM images of composite membranes.

关键词： Poly(vinylidene fluoride) (PVDF) Nano-crystalline cellulose (NCC) composite membranes Improved performances

Polymer-nanoinorganic particles composite membranes: a brief overview

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Frontiers of Chemical Science and Engineering 2009年第3期3卷 318-329页

作者： Zhen-liang XU Li-yun YU Ling-feng HAN State Key Laboratory of Chemical Engineering East China University of Science and TechnologyShanghai 200237China Membrane Science and Engineering R&D Lab Chemical Engineering Research CenterEast China University of Science and TechnologyShanghai 200237China

Polymer-nanoinorganic particles composite membranes present an interesting approach for improving the physical and chemical,as well as separation properties of polymer membranes,because they possess character-istics of both organic and inorganic membranes such as good permeability,selectivity,mechanical strength,ther-mal stability and so *** preparations and structures of polymer-nanoinorganic particles composite membranes and their unique properties are reviewed.

关键词： polymer nanoinorganic particles composite membranes

Swelling Behaviors and Pervaporation Properties of CA/PAN composite membranes for Separation of Caprolactam/Water Mixtures

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Wuhan University Journal of Natural Sciences 2010年第5期15卷 449-454页

作者： ZHANG Lei LUO Yunbai XUE Gaifeng YU Ping Research and Development Center of Wuhan Iron and Steel (Group) Corp Wuhan 430080 Hubei China College of Chemistry and Molecular Sciences Wuhan University Wuhan 430072 Hubei China

The composite membranes with cellulose acetate（CA） as the separating layer material and polyacrylonitrile（PAN） as the supporting layer material were prepared for separating caprolactam（CPL） from CPL/water mixtures by pervaporation *** swelling experiments were carried out to investigate the effects of swelling time and CPL concentration on the degree of *** results showed that the CA membrane reached swelling equilibrium within 24 h,and the degree of swelling first slightly decreased then increased with the increase of CPL concentration in the feed under the experimental *** comparing flux with permeance,and separation factor with selectivity,we found out that the separation performance of the CA/PAN composite membrane is more strongly dependent on its hydrophilic/hydrophobic nature as well as on the effects of operating parameters,such as feed composition concentration and feed temperature.

关键词： composite membranes separate CPL/water mixtures pervaporation performances

Preparation and Characterization of Nanocrystalline Cellulose/Poly(lactic acid) composite membranes

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Paper And Biomaterials 2017年第3期2卷 28-34页

作者： MeiChun Ding ChenWei Li FuShan Chen College of Chemistry and Molecular Engineering Qingdao University of Science and TechnologyState Key Laboratory Base of Eco-chemical Engineering College of Materials Science and Engineering Laboratory of Fiber Materials and Modern TextileQingdao University

Nanocrystalline cellulose(NCC)/poly(lactic acid)(PLLA) composite membranes were prepared by the solution casting *** and chemical modifications were performed to improve the compatibility of NCC and *** results indicated that the NCC dispersibility of the composite membranes with chemical modification were superior to that of the composite membranes with physical ***,the chemical modification NCC not only had a large effect on the nucleation and growth of the crystals,but also affected the crystal forms of *** was because chemical reactions took place between the silicone of silane coupling agent(KH-570) and the hydroxyl groups of NCC during *** chemical modification NCC could be dispersed stably in the PLLA matrix,and it played the role of a nucleating agent.

关键词： NCC PLLA composite membranes modification

Metal Salt and Non-Electrolyte Separation by Means of Dialysis through the composite membranes

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American Journal of Analytical Chemistry 2016年第5期7卷 478-486页

作者： Elena Butyrskaya Natalia Belyakova Ludmila Nechaeva Lubov Zolotaryova Vladimir Shaposhnik Vladimir Selemenev Department of Analytical Chemistry Federal Institution for Higher Education “Voronezh State University Voronezh Russian Federation

To separate salts of metals and non-electrolytes, the approach of dialysis through the composite membranes (CMs) is proposed. CM is a combination of cation and anion exchange areas. In the composite membrane, cations and anions are transferred through the respective exchange areas simultaneously without violation of macroscopic electro-neutrality. This provides a better transfer of salts than conventional ion exchange membranes (IEMs). The dialysis of the ethylene glycol aqueous salt solutions through the CMs was investigated. We have shown that the transport of salts through the composite membranes is more intensive (unlike IEM providing no transfer of salts from weakly mineralized aqueous solutions due to the Donnan exclusion) and the ethylene glycol transfer is not very significant, that is the basis of effective separation. The possibility to use of composite membranes for metal salt and other electrolyte separation is discussed.

关键词： membranes composite membranes Electrolytes Non-Electrolytes Separation Sodium Chloride Potassium Chloride Ethylene Glycol

Fabrication of high-performance PVA/PAN composite pervaporation membranes crosslinked by PMDA for wastewater desalination

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Petroleum Science 2018年第1期15卷 146-156页

作者： Rui Zhang Xiaoying Xu Bing Cao Pei Li College of Materials Science and Engineering Beijing University of Chemical Technology

The pyromellitic dianhydride（PMDA） crosslinked poly（vinyl alcohol）（PVA） was coated on top of the PAN ultrafiltration membrane to form a PVA/PAN composite PV membranes for wastewater desalination. The composite membranes have high application value in industrial wastewater treatment. By varying the membrane fabrication parameters including the weight percent（wt%） of the PMDA, the crosslink temperature and duration, membrane with the best desalination performance was obtained. The composite membrane with a 2-lm-thick PVA selective layer containing 20 wt% of PMDA and being crosslinked at 100 °C for 2 h showed the highest Na Cl rejection of 99.98% with a water flux of 32.26 L/（m^2 h）at 70 °C using the 35,000 ppm Na Cl aqueous solution as feed. FTIR spectroscopy, wide-angle X-ray diffraction, thermogravimetric analysis and scanning electron microscope have been used to characterize the structures and properties of both the crosslinked PVA dense films and PVA/PAN composite membranes. The effects of the concentrations of PMDA,the crosslinking time and temperature to the membrane water contact angle, swelling degree, salt rejection and water flux were systematically studied.

关键词： Pervaporation - Desalination Crosslinked PVA composite membranes Wastewater treatment

Cation Exchange Resin/ Sulfonated Poly （Styrene-ethylene-butylene） composite membranes for PEM Fuel Cells

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Cation Exchange Resin/ Sulfonated Poly （Styrene-ethylene-bu...

Electrospinning-hot pressing technique for the fabrication of thermal and electrical storage membranes and its applications

第九届全国化学工艺学术年会

作者： L Krishnan J Benziger A B Bocarsly Department of Chemistry Princeton University Princeton NJ 08544 Department of Chemical Engineering Princeton University Princeton NJ 08544 Department of Chemistry Princeton University Princeton NJ 08544

A new composite proton exchange membrane was made by casting a Sulfonated Poly (Styrene-ethylene-butylene) (SPSEB) solution with suspended micron sized particles of a crosslinked polystyrene cation ex

关键词： composite membranes polymer electrolyte membrane fuel cell electrochemistry

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International Journal of Minerals,Metallurgy and Materials 2024年第9期31卷 1945-1964页

作者： Panpan Che Baoshan Xie Penghui Cao Youfu Lv Daifei Liu Huali Zhu Xianwen Wu Zhangxing He Jian Chen Chuanchang Li Key Laboratory of Renewable Energy Electric-Technology of Hunan Province School of Energy and Power EngineeringChangsha University of Science and TechnologyChangsha 410114China State Key Laboratory of Disaster Prevention&Reduction for Power Grid Changsha University of Science and TechnologyChangsha 410114China School of Chemistry and Chemical Engineering Jishou UniversityJishou 416000China School of Chemical Engineering North China University of Science and TechnologyTangshan 063009China

The combination of electrospinning and hot pressing,namely the electrospinning-hot pressing technique(EHPT),is an efficient and convenient method for preparing nanofibrous composite materials with good energy storage *** emerging composite membrane prepared by EHPT,which exhibits the advantages of large surface area,controllable morphology,and compact structure,has attracted immense *** this paper,the conduction mechanism of composite membranes in thermal and electrical energy storage and the performance enhancement method based on the fabrication process of EHPT are systematically ***,the state-of-the-art applications of composite membranes in these two fields are *** particular,in the field of thermal energy storage,EHPT-prepared membranes have longitudinal and transverse nanofibers,which generate unique thermal conductivity pathways;also,these nanofibers offer enough space for the filling of functional ***,EHPT-prepared membranes are beneficial in thermal management systems,building energy conservation,and electrical energy storage,e.g.,improving the electrochemical properties of the separators as well as their mechanical and thermal *** application of electrospinning-hot pressing membranes on capacitors,lithium-ion batteries(LIBs),fuel cells,sodium-ion batteries(SIBs),and hydrogen bromine flow batteries(HBFBs)still requires *** the future,EHPT is expected to make the field more exciting through its own technological breakthroughs or be combined with other technologies to produce intelligent materials.

关键词： electrospinning-hot pressing technique thermal storage electrical storage composite membranes nanofiber

Innovative hydrophobic/hydrophilic perfluoropolyether(PFPE)/polyvinylidene fluoride(PVDF)composite membrane for vacuum membrane distillation

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Chinese Journal of Chemical Engineering 2022年第5期35卷 248-257页

作者： Jun Pan Xianli Xu Zhaohui Wang Shi-Peng Sun Zhaoliang Cui Lassaad Gzara Iqbal Ahmed Omar Bamaga Mohammed Albeirutty Enrico Drioli State Key Laboratory of Materials-Oriented Chemical Engineering College of Chemistry and Chemical EngineeringNanjing Tech UniversityNanjing 210009China National Engineering Research Center for Special Separation Membrane Nanjing Tech UniversityNanjing 210009China Jiangsu National Synergetic Innovation Center for Advanced Materials(SICAM) Nanjing Tech UniversityNanjing 210009China Center of Excellence in Desalination Technology King Abdulaziz UniversityJeddah 21589Saudi Arabia Mechanical Engineering Department King Abdulaziz UniversityJeddah 21589Saudi Arabia Research Institute on Membrane Technology ITM-CNRVia Pietro Bucci 17/CRende 87036Italy

Though membrane distillation(MD)has gained more and more attention in the field of desalination,the wetting phenomenon was still a non-negligible *** this work,a method combined dip-coating and UV in situ polymerization for preparing hydrophobic/hydrophilic perfluoropolyether(PFPE)/polyvinylidene fluoride composite *** composite membrane consisted of a top thin hydrophobic coating layer and hydrophilic substrate *** terms of anti-wetting properties,contact angle and liquid entry pressure of all composite membranes(except for those based on 0.45μm)exceeded 160°and 0.3 MPa,*** particular,the desalination performance was tested in vacuum membrane distillation tests by feeding 3.5%(mass)saline solution(NaCl)at 60℃.The composite membranes with larger support pore size and lower PFPE content had higher membrane distillation *** for stability tests(testing the 0.22μm membrane coated by 5%(mass)PFPE),the highest MD flux29.08 kg·m^(-2)·h^(-1) and stable salt rejection(over 99.99%)during the *** that,the effects of coating material concentration and pore sizes of substrate membrane were also investigated for surface morphology and topography,porosity,mechanical strength and pore size *** work provided a simple and effective alternative to prepare excellent hydrophobic composite membranes for MD applications.

关键词： Desalination Membrane surface coating composite membranes Anti-wetting Vacuum membrane distillation