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Effect of molecular weight on chemical and thermal stability of polyimide nanofiltration membrane
Authors： Song Keying, Pan Kai*, Cao Bing
Units： College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China
KeyWords： solvent-resistant membrane, polyimide, two-step method, molecular weight
ClassificationCode：TQ028.5
year,volume(issue):pagination： 2014, 34(2):23-27

Abstract：

In this paper, polyimide (PI) solvent-resistant nanofiltration membranes were fabricated by a two-step method. The effect of precursor molecular weight on the structure and performance of PI membranes was investigated. The polyamic acid (PAA) precursors with different molecular weight were synthesized by changing the ratio of PMDA and ODA. The chemical and thermal stability of PI membranes were investigated. The results showed that the increasing molecular weight can help to make a membrane with a denser skin layer as well as a lower flux. In a range of PAA molecular weight, the FCF rejection increased from 68.2% to 93.8% when the molecular weight increased. And then the rejection was nearly unchanged with the increasing molecular weight. The membranes can be stable both in most organic solvent and high temperature. The results indicated that the chemical and thermal stability of PI membranes increased with the increasing molecular weight of PAA. The FCF rejection of PI membranes prepared from high PAA molecular weight kept higher than 85% in most organic solvent and almost the same in high temperature
 

Funds：
科技支撑项目（2011BAE11B01)，北京化工大学中央高校基本科研业务费(ZZ1112)

AuthorIntro：
宋可莹(1987-)，女，福建厦门人，硕士，从事高分子膜制备与应用方向研究，E-mail: skybuct@126.com. *通讯联系人，电话：010-64413857, E-mail: pankai@mail.buct.edu.cn; bcao@mail.buct.edu.cn

Reference：

[1] Song J F, Li X M, Figoli A, et al. Composite hollow fiber nanofiltration membranes for recovery of glyphosate from saline wastewater [J]. Water Research, 2013, 47(6): 2065-2074.
[2] Wang Y, Jiang L, Matsuura T. Investigation of the fundamental differences between polyamide-imide (PAI) and polyetherimide (PEI) membranes for isopropanol dehydration via pervaporation [J]. Journal of Membrane Science, 2008, 318(1-2): 217-226.
[3] Volkov A V, Parashchuk V V, Stamatialis D F, et al. High permeable PTMSP/PAN composite membranes for solvent nanofiltration [J]. Journal of Membrane Science, 2009, 333(1-2): 88-93.
[4] 丁孟贤.聚酰亚胺：化学、结构与性能的关系及材料 [M].北京：科学出版社，2006.1-4
[5] Jiang L Y, Chung T S, Rajagopalan R. Dehydration of alcohols by pervaporation through polyimide Matrimid asymmetric hollow fibers with various modifications [J]. Chemical Engineering Science, 2008, 63(1): 204-216.
[6] Shi D, Kong Y, Yu. J, et al. Separation performance of polyimide nanofiltration membranes for concentrating spiramycin extract [J]. Desalination, 2006, 191(1-3): 309-317.
[7] See-Toh Y H, Ferreira F C, Livingston A G. The influence of membrane formation parameters on the functional performance of organic solvent nanofiltration membranes [J]. Journal of Membrane Science, 2007, 299(1-2): 236–250.
[8] Soroko I, Livingston A. Impact of TiO2 nanoparticles on morphology and performance of crosslinked polyimide organic solvent nanofiltration (OSN) membranes [J]. Journal of Membrane Science, 2009, 343(1-2): 189-198.
[9] 房昺，潘凯，曹兵.均苯型聚酰亚胺耐溶剂纳滤膜的制备[J]. 膜科学与技术，2012, 32(2): 1-4.
[10] Vandezande P, Li X, Gevers E M L, et al. High throughput study of phase inversion parameters for polyimide-based SRNF membranes [J]. Journal of Membrane Science, 2009, 330(1-2): 307-318.
[11] Soroko I, Lopes M P, Livingston A. The effect of membrane formation parameters on performance of polyimide membranes for organic solvent nanofiltration (OSN): Part A. Effect of polymer/solvent/non-solvent system choice [J]. Journal of Membrane Science, 2011, 381(1-2): 152-162.
[12] Soroko I, Lopes M P, Livingston A. The effect of membrane formation parameters on performance of polyimide membranes for organic solvent nanofiltration (OSN). Part B: Analysis of evaporation step and the role of a co-solvent [J]. Journal of Membrane Science, 2011, 381(1-2): 163-171.
[13] Soroko I, Lopes M P, Livingston A. The effect of membrane formation parameters on performance of polyimide membranes for organic solvent nanofiltration (OSN), Part C. Effect of polyimide characteristics [J]. Journal of Membrane Science, 2011, 381(1-2): 172-182.
[14] Wu C, Zhang S, Yang D. Preparation, characterization and application of a novel thermal stable composite nanofiltration membrane[J]. Journal of Membrane Science, 2009, 326 (2): 429-434.

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