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正庚烷为溶剂高温下制备聚二甲基硅氧烷渗透汽化膜的研究

作者：李育泽，史宝利

单位：东北林业大学，理学院，高分子膜实验室，哈尔滨 150040

关键词：聚二甲基硅氧烷膜；正庚烷；渗透汽化；乙醇

DOI号：

分类号： TQ028.8

出版年,卷(期):页码： 2017,37(1):81-86

摘要：

为了缩短交联时间，本文以正庚烷作为溶剂，通过提高交联温度来制备聚二甲基硅氧烷渗透汽化膜。研究了交联温度和催化剂用量对交联膜的拉伸模量、水与乙醇的接触角以及膜在水和乙醇中溶胀度的影响。以10wt%的乙醇水溶液为料液，研究了分离温度对膜渗透汽化性能的影响。研究发现在75℃交联温度下交联时间为0.63h，这仅是在20℃时交联时间（7.8h）的十分之一。交联温度为75℃时制备的膜的杨氏模量是90℃时制备的膜的杨氏模量的二倍。随着交联温度的升高，PDMS膜的杨氏模量逐渐变小，膜在水中的溶胀度较低，膜在乙醇中的溶胀度很高。催化剂的用量对于膜的杨氏模量和溶胀度没有明显影响。此外，实验发现交联温度和催化剂用量对膜的疏水性没有明显影响。对于10wt%乙醇水溶液的渗透汽化分离实验表明，在交联温度为75℃条件下制备的膜的分离因子达到7.74。

In order to reduce the crosslinking time by increasing the crosslinking temperature, n-heptane was used as solvent to prepare PDMS pervaporation membranes. The paper studied the effect of crosslinking temperature and catalyst content on the crosslinked membrane tensile modulus, the contact angle of water and ethanol, and the swelling degree in water and ethanol. With 10 wt% ethanol aqueous solution as the feed liquid, it was studied the separation temperature effect on the performance of pervaporation membrane. It was found that the crosslinking time at 75°C was 0.63h, which was only one-tenth of the crosslinking time at 20°C (7.8h). The tensile modulus of the PDMS membrane prepared at 75°C was twice as the PDMS membrane prepared at 90°C. The increase in crosslinking temperature resulted in the deterioration of the tensile strength of the membranes, compared with the swelling degree in water, the swelling degree in ethanol was large. The change in the catalyst content showed no obvious effect on the tensile modulus and swelling degree. Both the crosslinking temperature and catalyst content exerted nearly no influence on the hydrophobic property of the membrane. With 10wt% ethanol aqueous solution of pervaporation separation experiment showed the separation factor of the PDMS membrane prepared at 75°C reached 7.74.

基金项目：

国家自然科学基金资助项目（21376048）；

作者简介：

第一作者简介：李育泽（1991-），女，黑龙江省伊春市人，在读硕士，师承史宝利教授，从事高分子渗透汽化膜研究。*通讯作者，E-mail：shi_baoli@yahoo.com

参考文献：

[1] Liu G P, Gan L, Liu S N, Zhou H L, Wei W, Jin W Q. PDMS/ceramic composite membrane for pervaporation separation of acetone-butanol-ethanol (ABE) aqueous solutions and its application in intensification of ABE fermentation process. [J]. Chem Eng Process, 2014, 86: 162-172.
[2] Sun D, Li B B, Xu Z L. Pervaporation of ethanol/water mixture by organophilic nano-silica filled PDMS composite membranes. [J]. Desalination, 2013, 322: 159-166.
[3] Peng P, Shi B L, Lan Y Q. Preparation of PDMS-Silica Nanocomposite Membranes with Silane Coupling for Recovering Ethanol by Pervaporation. [J]. Sep Sci Technol, 2011, 46: 420-427.
[4] 李继定，陈剑，叶宏，等. 渗透汽化节能膜技术及其在石化领域中应用. [J]. 化工进展，2006，25（增刊）：25-29.
[5] Wei W, Xia S S, Liu G P, Dong X L, Jin W Q, Xu N P. Effects of polydimethylsiloxane (PDMS) molecular weight on performance of PDMS/ceramic composite membranes. [J]. J. Membr Sci, 2011, 375: 334-344.
[6] Mohammadi T, Aroujalian A, Bakhshi A. Pervaporation of dilute alcoholic mixtures using PDMS membrane. [J]. Chem Eng Sci, 2005, 60: 1875-1880.
[7] Zhou H L, Su Y, Chen X R, et al. Modification of silicalite-1 by vinyltrimethoxysilane (VTMS) and preparation of silicalite-1 filled polydimethylsiloxane (PDMS) hybrid pervaporation membranes. [J]. Sep Purif Technol, 2010, 75: 286-294.
[8] 赵长伟，李继定，赵之平，等. PDMS有机硅膜的制备及其渗透汽化脱硫的研究. [J]. 膜科学与技术，2006，26（5）：72-75.
[9] 李继定，展侠，葛洪，等. 渗透汽化和汽体渗透膜技术应用及其浮浅思考. [J]. 膜科学与技术，2011，31（3）：135-139.
[10] Peng P, Shi B L, Lan Y Q. A review of membrane materials for ethanol recovery by pervaporation. [J]. Sep Sci Technol, 2011, 46: 234-246.
[11] 徐玲芳，相里粉娟，陈祎玮，金万勤，等. 渗透汽化在生物燃料乙醇制备中的研究进展. [J]. 化工进展，2007，26（6）：786-795.
[12] Bowen T C, Meier R G, Vane L M. Stability of MFI zeolite-filled PDMS membranes during pervaporative ethanol recovery from aqueous mixtures containing acetic acid. [J]. J Membr Sci, 2007, 298: 117-125.
[13] 申屠佩兰，邢卫红. 膜分离技术和生物发酵法生产燃料乙醇中的应用发展. [J]. 食品和发酵工业，2008,34（10）：121-126.
[14] El-Bourawi M S, Ding Z, Ma R, et al. A framework for better understanding membrane distillation separation process. [J]. J Membr Sci, 2006, 285: 4-29.
[15] Beaumelle D, Marin M, Gibert H. Pervaporation with organophilic membranes: state of the art. [J]. Food Bioprod Process, 1993, 71: 77.
[16] Zhang W. Q, Su X, Shi B L, et al. Influence of molecular weight of polydimethylsiloxane precursors and crosslinking content on degree of ethanol swelling of crosslinked networks. [J]. React Funct Polym, 2015, 86: 264-268.
[17] Su X, Shi B L. Effect of silane coupling agents with different non-hydrolytic groups on tensile modulus of composite PDMS crosslinked membranes. [J]. React Funct Polym, 2016, 98: 1-8.
[18] Liu X J, Xu Y, Ben K Y, et al. Transparent, durable and thermally stable PDMS-derived superhydrophobic surfaces. [J]. Appl Surf Sci, 2015, 339: 94-101.
[19] Ji L Y, Shi B L, Wang L L. Pervaporation separation of ethanol/water mixture using modified zeolite filled PDMS membranes. [J]. Appl Polym Sci, 2015, 41897: 1-9.
[20] Berean K, Ou J Z, Nour M, et al. The effect of crosslinking temperature on the permeability of PDMS membranes: Evidence of extraordinary CO2 and CH4 gas permeation. [J]. Sep Purif Technol, 2014, 122: 96-104.
[21] Zhuang X J, Chen X G, Su Y, et al. Improved performance of PDMS/silicalite-1 pervaporation membranes via designing new silicalite-1 particles. [J]. Membr Sci, 2015, 493: 37-45.
[22] Zhou H L, Lv L, Liu G P, Jin W Q, Xing W H. PDMS/PVDF composite pervaporation membrane for the separation of dimethyl carbonate from a methanol solution. [J]. Membr Sci, 2014, 471: 47-55.
[23] Dong Z Y, Liu G P, Liu S N, et al. High performance ceramic hollow fiber supported PDMS composite pervaporation membrane for bio-butanol recovery. [J]. Membr Sci, 2014, 450: 38-47.
[24] Chang C L, Chang M S. Preparation of multi-layer silicone/PVDF composite membranes for pervaporation of ethanol aqueous solutions. [J]. J Membr Sci, 2004, 238: 117-122.
[25] Vane L M. A review of pervaporation for product recovery from biomass fermentation processes. [J]. J Chem Technol Biotechnol, 2005, 80: 603-629.
[26] Beaumelle D, Marin M, Gibert H. Pervaporation with organophilic membranes: state of the art. [J]. J. Food Eng, 1992, 16: 293-307.
[27] Fu C H, Cai D, Hu S, Miao Q, et al. Ethanol fermentation integrated with PDMS composite membrane: An effective process. [J]. Bioresour Technol, 2016, 200: 648-657.

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