膜科学与技术

位置：首页 >> 期刊内容阅读

底膜对PEG/PVDF复合膜脱硫性能的影响

作者：张杏梅，赵宇航，李学坤，蔡采彬，韩小龙

单位：西安文理学院化学工程学院，西安 710065；西北大学化工学院，西安 710069

关键词： PEG/PVDF复合膜；渗透汽化；脱硫

DOI号：

分类号： TQ028.8

出版年,卷(期):页码： 2021,41(2):56-62

摘要：

选用N-甲基吡咯烷酮、N,N-二甲基乙酰胺和磷酸三乙酯三种不同溶剂，采用浸没沉淀相转化法制备出三种不同孔径的PVDF超滤膜，刮涂PEG后制得PEG/PVDF复合膜。采用扫描电子显微镜（SEM）、红外光谱（FTIR）、X射线衍射（XRD）等对底膜与复合膜的形貌、官能团和结晶度进行分析。计算了PVDF底膜的孔尺寸和孔隙率，测试了底膜的超滤性能和PEG/PVDF复合膜的脱硫性能。结果表明，底膜对PEG/PVDF复合膜脱硫性能的影响很大，与N-甲基吡咯烷酮和N,N-二甲基乙酰胺相比，选用磷酸三乙酯作溶剂时制备的PVDF超滤膜最适合做支撑底膜，复合膜的脱硫性能最好。

In this paper, three kinds of PVDF ultrafiltration membrane with different pore size were prepared by phase inversion method using N-methylpyrrolidone, N, N-dimethylacetamide and triethyl phosphate as the solvents, and then the PEG/PVDF composite membranes were prepared by kinfie coating PEG solution. Scanning electron microscope (SEM), infrared spectroscopy (FTIR) and X-ray diffraction (XRD) were used to characterize the surface and cross-section morphologies, functional groups, and crystallinity of the suppoting and the composite membrane, respectively. In addition, the pore size and porosity of the PVDF membrane were calculated and the desulfurization performance of the PEG/PVDF composite membranes were tested. The results indicate that the PVDF supporting membranes have great effect on the desulfurization performance of the PEG/PVDF composite membranes. Compared with N-methylpyrrolidone and N, N-dimethylacetamide, triethyl phosphate is more suited as phase conversion solvent to prepare the PVDF supporting membrane, and accordingly the prepared PEG/PVDF composite membrane has best desulfurization performance.

基金项目：

陕西省重点研发计划一般项目（2019GY-207），陕西省教育厅专项科研计划项目（17JK1121），大学生创新训练项目（S201911080052）

作者简介：

张杏梅（1975-），陕西大荔人，博士，副教授，研究方向为膜分离技术。 E-mail:zhxm_v@163.com.

参考文献：

[1]Qu H M, Kong Y, Lv H L, et al. Effect of crosslinking on sorption, diffusion and pervaporation of gasoline components in hydroxyethyl cellulose membranes [J], Chemical Engineering Journal, 2010, 157: 60-66.
[2]Qi R B, Zhao C W, Li J D, et al. Removal of thiophens form n-octane/thiophene mixtures by pervaporation [J]. Journal of Membrane Science, 2006, 269: 94-100.
[3]Lin L G, Wang G, Qu H M, et al. Pervaporation performance of crosslinked polyethylene glycol membranes for deep desulfurization of FCC gasoline [J]. Journal of Membrane Science, 2006, 280 (1-2): 651-658.
[4]Yang Z J, Zhang W Y, Li J D, et al. Polyphosphazene membrane for desulfurization: Selecting poly [bis (trifluoroethoxy) phosphazene] for pervaporative removal of thiophene [J]. Separation and Purification Technology, 2012, 93:15-24.
[5]Liu K, Fang C J, Li Z Q, et al. Separation of thiophene/n-heptane mixtures using PEBAX/PVDF composite membranes via pervaporation [J]. Journal of Membrane Science, 2014, 451: 24-31.
[6]Lin L G, Wang G, Qu H M, et al. Pervaporation performance of crosslinked polyethylene glycol membranes for deep desulfurization of FCC gasoline [J]. Journal of Membrane Science, 2006, 280 (1-2): 651-658.
[7]Lin L G, Zhang Y, Li H. Pervaporation and sorption behavior of zeolite-filled polyethylene glycol hybrid membranes for the removal of thiophene species [J]. Journal of Colloid and Interface Science, 2010, 350 (1): 355-360.
[8]Han X L, Hu T T, Wang Y, et al. A water-based mixing process for fabricating ZIF-8/PEG mixed matrix membranes with efficient desulfurization performance [J]. Separation and Purification Technology, 2019, 214:61-66.
[9]张杏梅，胡文玲，孙鹤翔，等. 活性炭填充PEG/PVDF杂化膜的脱硫性能 [J]. 化工学报，2018, 69(2): 866-872.
[10]Chen J, Li J D, Chen J X, et al. Pervaporation separation of ethyl thioether/heptane mixtures by polyethylene glycol membranes [J]. Separation and Purification Technology, 2009, 66:606-612.
[11]Hu W L, Han X L, Liu L L, et al. PEG/PVDF membranes for separating organosulphur compounds from n-heptane: effect of PEG molecular weight [J]. Canadian Journal of Chemical Engineering, 2017, 95(2):364-371.
[12]Yang Z J, Zhang W Y, Li J D, et al. Preparation and characterization of PEG/PVDF composite membranes and effect of solvents on its pervaporation performance in heptane desulfurization [J]. Desalination and Water Treatment, 2012, 46: 321-331.
[13]Boccaccio T, Bottino A, Capannelli G, et al. Characterization of PVDF membranes by vibrational spectroscopy[J]. Journal of Membrane Science, 2012, 210:315-329.
[14]Tan Z, Fu C, Gao Y, et al. Modifications of Gamma poly (vinylidene fluoride) (γ-PVDF) films by high energy electron beam irradiation[J]. Radiation Physics and Chemistry, 2018, 153:258-268.
[15]Martins P, Lopes A, Lanceros S. Electroactive phases of poly(vinylidene fluoride): Determination, processing and applications[J]. Progress in Polymer Science, 2014, 39:683-706.
[16]Lins L, Livia S, Maréchal M. Structural dependence of cations and anions to building the polar phase of PVDF[J]. European Polymer Journal, 2018, 107:236-248.
[17]左丹英，徐卫林，徐又一. 溶剂对铸膜液相转化和微孔膜皮-亚两层结构的不同影响 [J]. 高分子学报，2008, 6: 522-528.
[18]Yeow M L, Liu Y T, Li K. Morphological study of Poly(vinylidene fluoride) asymmetric membranes: effects of the solvent, additive, and dope temperature [J]. Journal of Applied Polymer Science, 2004, 92: 1782-1789.

服务与反馈：

【文章下载】【加入收藏】

《膜科学与技术》编辑部地址：北京市朝阳区北三环东路19号蓝星大厦邮政编码：100029 电话：010-64426130/64433466 传真：010-80485372邮箱：mkxyjs@163.com