疏水性纳米SiO2填充PDMS/PET复合膜的制备及分离性能研究
作者:王光芳,李然,王亮,孙德
单位: 长春工业大学化学工程学院,吉林 长春 130012
关键词: 聚二甲基硅氧烷;SiO2;改性膜;拉伸强度;分离因子
出版年,卷(期):页码: 2011,31(6):41-45

摘要:
本文采用聚酯(PET)为支撑层,以疏水性气相法纳米SiO2填充改性的聚二甲基硅氧烷(PDMS)为皮层制备硅橡胶复合膜,用SEM、WSM-5KN、TGA对膜改性后的物理形貌、拉伸强度及热稳定性进行分析与表征,并以乙醇/水物系为研究对象,着重考察了料液温度和浓度对改性复合膜渗透分离性能的影响。结果表明,改性膜的热稳定性显著提高,拉伸强度从空白膜的1.5Mpa增加到7.4MPa。随着疏水气相法纳米SiO2含量的增加填充膜的分离因子极值不断增加并提前。
The current PDMS/PET composite membranes were prepared by filling polydimethylsiloxane (PDMS) membrane with fumed hydrophobic nano-silica on PET membrane. The physical morphology, tensile strength and thermal resistant performance of the as-prepared composite membranes were investigated by SEM, WSM-5KN and TGA. And further the effects of feed temperature, feed concentration on the pervaporation performance of ethanol/water solutions were also examined. It was shown from the results that the thermal resistant performance of the modified membrane was significantly improved and its tensile-strength was increased from 1.5Mpa to 7.4MPa compared with pure PDMS. Otherwise the peak value of the membrane separation factor seemed to constantly appear in advance.
王光芳(1985—),女,山东潍坊人,研究生,主要从事硅橡胶材料的研究。E-mail: kuailexiaobianzi@163.com *联系人:孙德,高级实验师。

参考文献:
[1] 陈翠仙, 余立新, 祁喜旺. 渗透汽化膜分离技术的进展及在石油化工中的应用. 膜科学与技术, 1997, 17(3): 14-18.
[2] 祁喜旺, 陈洪钫. 渗透蒸发膜及其传质的研究进展[J]. 膜科学与技术, 1995, 15(3): 1-9.
[3] 方志平, 冯海锋, 吴洪等. 改性PDMS膜的制备与渗透蒸发分离性能研究[J]. 天津工业大学学报, 2005, 24(5):28~32
[4] O'Brien D J, Senske G E, Kurantz M J, et al. Ethanol Recovery from Corn Fiber Hydrolysate Fermentations by Pervaporation [J].Bioresour. Technol., 2004, 92(1): 15−19.
[5] Vane L M. A Review of Pervaporation for Product Recovery fromBiomass Fermentation Processes [J]. J. Chem. Technol. Biotechnol., 2005, 80(6): 603−629.
[6] Wu Y, Xiao Z, Huang W, et al. Mass Transfer in Pervaporation ofActive Fermentation Broth with a Composite PDMS Membrane [J]. Sep. Purif. Technol., 2005, 42(1): 47−53.
[7] 姜泉, 石尔, 黄卫星, 等. 硅橡胶膜生物反应器中乙醇发酵与渗透汽化的耦合[J]. 精细化工, 2007, 24(1): 50−54.
[8] Lu S-Y, Chiu C P, Huang H Y. Pervaporation of Acetic Acid/Water Mixtures through Silicalite Filled Polydimethylsiloxane Membranes[J]. J. Membr. Sci., 2000, 176(2): 159−167.
 

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

京公网安备11011302000819号