Studies on extraction characteristics of volatile organic compounds and mechanical properties change with methyl silicone rubber membrane

doi:10.16085/j.issn.1000-6613.2016-2062

Abstract

Abstract: Macroscopic property of materials has connection with its microstructure.Three kinds of organic matters,which commonly found in high salinity wastewater,and ten kinds of structural parameters were selected to analyze the relationship between structural parameters and the extraction efficiency of these organic matters in the methyl silicone rubber membrane.Mechanical propertiy change of methyl silicone rubber membrane under the factors was researched as well as.Results showed that octanol-water partition coefficient and molecular polarizability of organic matter were the main factors in the methyl silicon rubber membrane.Research on mechanical properties change of methyl silicone rubber membrane suggested that the influence of acidity was greater than temperature and salinity.The mechanical behavior and retention extent of Na⁺ still could meet the requirements of membrane after 40 days.The methyl silicone rubber membrane has advantages of long life and low replacement frequency.

Key words: volatile organic compounds, membrane, extraction, recovery, mechanical properties

摘要： 物质所表现出的宏观特性与其结构之间存在着一定的联系，本文主要结合有机物结构参数研究了甲基硅橡胶膜对三大类有机物（苯胺类、苯酚类、低分子有机酸类）的萃取回收特性，对有机物的回收结果进行拟合分析；同时研究了甲基硅橡胶膜萃取有机物过程中膜的力学性能变化，结合膜萃取技术应用的环境主要选取了酸度、盐度、温度3个因素进行膜力学性能变化研究。结果表明：在选取的结构参数中，影响膜回收挥发性有机物的结构参数主要包括有机物的辛醇/水分配系数和分子极化率；膜外溶液的酸度变化对甲基硅橡胶膜硬度的影响比较显著，其次是膜管内盐离子浓度，温度对硅橡胶硬度变化的影响最小；硅橡胶膜的弹性性质很稳定，几乎不变；溶液酸度对甲基硅橡胶膜的Na⁺通透性变化有显著影响，而在膜管内循环流动的无机盐溶液浓度和运行温度都对Na⁺通透性的大小无显著影响。总体来说，溶液酸度对甲基硅橡胶膜的影响高于温度和溶液盐度，甲基硅橡胶膜在老化40天后仍满足膜的力学性能要求，保持较高的Na⁺截留率，具有萃取膜高效分离、使用寿命长、更换频率低的优点。

关键词: 挥发性有机物, 膜, 萃取, 回收, 力学性能

CLC Number:

TQ028.8

HUA Li, GUO Pei, WANG Yutong, WANG Tianpei, MA Hongrui, SHI Yan. Studies on extraction characteristics of volatile organic compounds and mechanical properties change with methyl silicone rubber membrane[J]. Chemical Industry and Engineering Progress, 2017, 36(07): 2645-2652.

花莉, 郭培, 王宇彤, 王天培, 马宏瑞, 石岩. 挥发性有机物的膜回收特性及膜力学性能变化[J]. 化工进展, 2017, 36(07): 2645-2652.

References

[1] 王连生,韩朔睽. 分子结构、性质与活性[M]. 北京:化学工业出版社,1997. WANG Liansheng,HAN Shuokui. Molecular structure,property and activity[M]. Beijing:Chemical Industry Press,1997.
[2] 邓情,姚佩娜,樊森清,等. 发酵-渗透汽化-蒸汽分离集成工艺生产乙醇[J]. 哈尔滨工业大学学报,2015,36(3):418-422. DENG Qing,YAO Peina,FAN Senqing,et al. Ethanol production with fermentation-pervaporation-permeated vapor recovery and refinement[J]. Journal of Harbin Engineering University,2015,36(3):418-422.
[3] 陈春燕,张俊青,崔海娣,等. PDMS膜生物反应器封闭循环连续发酵生产ABE[J]. 高校化学工程学报,2013,27(3):469-475. CHEN Chunyan,ZHANG Junqing,CUI Haidi,et al. ABE fermentation in a continuous and closed-circulating fermentation system with PDMS membrane bioreactor[J]. Journal of Chemical Engineering of Chinese Universities,2013,27(3):469-475.
[4] 吴丽丽,周集体,张爱丽,等. 膜萃取处理高浓度含苯胺废水[J].化工进展,2007,26(5):715-719. WU Lili,ZHOU Jiti,ZHANG Aili,et al. Highly concentrated aniline-loaded wastewater treatment with membrane extraction[J]. Chemical Industry and Engineering Progress,2007,26(5):715-719.
[5] XIAO Min,ZHOU Jiti,ZHANG Yuge. Pertraction performance of phenol through PDMS/PVDF composite membrane in the membrane aromatic recovery system(MARS)[J]. Journal of Membrane Science, 2013,428:172-180.
[6] YAO Jie,YANG Shuren,DU Ziwei,et al. Pilot investigation of coal chemical wastewater containing phenol by pervaporation process[J]. Journal of Membrane and Separation Technology,2013,2:148-152.
[7] 张国军,王乃鑫,李杰,等. 乙烯基PDMS/PSf复合膜及其乙醇/水分离性能[J]. 膜科学与技术,2016,16(4):103-109. ZHANG Guojun,WANG Naixin,LI Jie,et al. Preparation of Vi-PDMS/PSf composite membrane and its pervaporation performance in ethanol/water mixtures[J]. Journal of Membrane Science,2016,16(4):103-109.
[8] NAIK P V,KERKHOFS S,MARTENS J A,et al. PDMS mixed matrix membranes containing hollow silicalite sphere for ethanol/water separation by pervaporation[J]. Journal of Membrane Science,2016,502:48-56.
[9] SUN De,LI Bingbing,XU zhenliang. Pervaporation of ethanol/water mixture by organophilic nano-silica filled PDMS composite membranes[J]. Desalination,2013,322:159-166.
[10] JULLOK N,VAN HOOGHTEN R,LUIS P,et al. Effect of silica nanoparticles in mixed matrix membranes for pervaporation dehydration of acetic acid aqueous solution:Plant-inspired dewatering systems[J]. Journal of Cleaner Production,2016,12(5):4879-4889.
[11] 王天培,马宏瑞,花莉,等. 膜萃取技术回收浓缩废水中邻甲苯胺的研究[J]. 环境工程学报,2016,3(10):1241-1246. WANG Tianpei,MA Hongrui,HUA Li,et al. Recovery of o-toluidine from production wastewater by membrane extraction[J]. Chinese Journal of Environmental Engineering,2016,3(10):1241-1246.
[12] CAI Weibin,SUN Yanzhi,PIAO Xianglan. Solvent recovery from soybean oil/hexane miscella by PDMS composite membrane[J]. Chinese Journal of Chemical Engineering,2011,19(4):575-580.
[13] LE GAC P Y,LE SAUX V,MARCO Y. Ageing mechanism and mechanical degradation behaviour of polychloroprene rubber in a marine environment:Comparison of accelerated ageing and long term exposure[J]. Polymer Degradation and Stability,2012,97(3):288-296.
[14] Calculated using Advanced Chemistry Development(ACD/Labs) Software V11.02(© 1994-2015 ACD/Labs)[CP].
[15] 王建国,刘洋,方春华,等. 交流电晕对高温硫化硅橡胶性能的影响[J]. 高分子学报,2009(4):331-337. WANG Jianguo,LIUYang,FANG Chunhua. Performance influence of high temperature vulcanization silicone rubber by alternating current corona discharge[J]. Acta Polymerica Sinica,2009(4):331-337.
[16] 田堃,李泽,李美江,等. 含多面体低聚倍半硅氧烷超支化聚合物的研究进展[J]. 杭州师范大学学报(自然科学版),2016,15(1):7-13. TIAN Kun,LI Ze,LI Meijiang,et al. Research progress of hyperbranched polymers with polyhedral oligomeric silsesquioxane[J]. Journal of Hangzhou Normal University(Natural Science Edition),2016,15(1):7-13.
[17] 蒋莎莎. 硅橡胶加速老化及失效机理研究[D]. 哈尔滨:哈尔滨工业大学,2013. JIANG Shasha. Study on accelerated aging and failure mechanism of silicone rubber[D]. Harbin:Harbin Engineering University,2013.