浓乳液渗透分离膜脱醇性能研究
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摘要
利用有机硅的室温交联技术和引入刚性苯乙烯互穿网络及接枝交联的增强改性,成功地使改性有机硅浓乳液乳胶粒子内部及粒子之间进行交联,得到了相互挤压密集堆砌结构稳定并且有一定力学性能的分离膜材料。本文考察了改性有机硅浓乳液法分离膜以渗透蒸发方法从醇水混合物中脱醇的分离性能,研究结果表明,分离膜渗透蒸发通量随着引入苯乙烯用量以及料液浓度的增加而增加,从水中脱除乙醇的分离因子在引入的苯乙烯含量为18%的地方分离选择性有一个最大值为7.4。随着料液中乙醇浓度的增加,分离通量选择性出现了峰值,在乙醇浓度为33.41%时,对乙醇的分离因子α可达到11.3。
By use of room temperature crosslinking technology of silicone and the introduction of rigid styrene of modified-interpenetrating network and reinforcedgrafting-crosslinking,between the modified concentrated silicone emulsion particles and internalparticles were successfully crosslinked.The membrane which has mutual-intensive-stacking structure and certain mechanical properties were obtained.The separation performance of the modified silicone concentrated emulsion by use of pervaporation method separating from the alcohol water mixture was examined.The results show that pervaporation flux of the separation membrane increases with the concentration of styrene and feed illiquid.There is a maximum value of 7.4when the separation factor is introduced in the styrene content for the local of separation selectivity 18%.With the increase of ethanol concentration,the selective separation factor a reach 11.3when the ethanol concentration is 33.41%.
By use of room temperature crosslinking technology of silicone and the introduction of rigid styrene of modified-interpenetrating network and reinforcedgrafting-crosslinking,between the modified concentrated silicone emulsion particles and internalparticles were successfully crosslinked.The membrane which has mutual-intensive-stacking structure and certain mechanical properties were obtained.The separation performance of the modified silicone concentrated emulsion by use of pervaporation method separating from the alcohol water mixture was examined.The results show that pervaporation flux of the separation membrane increases with the concentration of styrene and feed illiquid.There is a maximum value of 7.4when the separation factor is introduced in the styrene content for the local of separation selectivity 18%.With the increase of ethanol concentration,the selective separation factor a reach 11.3when the ethanol concentration is 33.41%.
引文
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3 Flory P J.Principle of polymer chemistry[M].New York:Cornell University Press,1953
4 Masao Kakudo,Nobutami Kasai.X-ray diffraction by polymers[M].Tokyo:Elsevier Puiblishing Co,1972
5 Mandal S,Pangarkar V G.Separation of methanol-benzene and methanol-toluene mixtures by pervaporation:Effects of thermodynamics and structural phenomenon[J].J Membrane Sci,2002,201(2):175
6 Zhang Shimin,Drioli E.Pervaporation membtranes[J].Sep Sci Technol,1995,30(1):1
2 叶立,黄卫星,肖泽仪,等.硅橡胶膜用于工业化乙醇连续发酵的实验研究[J].上海化工,2003,8(4):18
3 Flory P J.Principle of polymer chemistry[M].New York:Cornell University Press,1953
4 Masao Kakudo,Nobutami Kasai.X-ray diffraction by polymers[M].Tokyo:Elsevier Puiblishing Co,1972
5 Mandal S,Pangarkar V G.Separation of methanol-benzene and methanol-toluene mixtures by pervaporation:Effects of thermodynamics and structural phenomenon[J].J Membrane Sci,2002,201(2):175
6 Zhang Shimin,Drioli E.Pervaporation membtranes[J].Sep Sci Technol,1995,30(1):1