共查询到20条相似文献,搜索用时 78 毫秒
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合成了三种新型聚酰亚胺,并制成渗透汽化膜用以分离乙醇-水、异丙醇-水混合物。结果表明,三种聚酰亚胺均具有较高的分离系数,在分子主链中含有—Si—(CH_3)_2—链节的聚酰亚胺膜,其透过速率高于、分离系数低于其它两种聚酰亚胺,并从聚合物分子结构的观点讨论了其原因。 相似文献
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膜分离技术在抗生素提炼过程中的应用 总被引:7,自引:1,他引:7
膜分离过程是一种选择性高,操作简单,能耗低的纯物理分离技术,已在各工业领域和科学研究中得到广泛的应用,文章对膜分离技术在抗生素提炼领域的技术进展进行了较全面的综述。 相似文献
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应用非溶剂致相法,通过自主设计研发的平板刮膜机制备聚偏氟乙烯(PVDF)成品膜.为提高PVDF超滤膜的综合性能,以聚乙二醇(PEG)为成孔剂,以二氧化钛(TiO2)为添加剂,系统研究了PVDF固含量、成孔剂种类和含量以及TiO2纳米颗粒对PVDF超滤膜的微观形态以及通量和截留率的影响.结果表明,当PVDF固含量(质量分数)为22%,PEG-6000质量分数为17.5%,并且添加质量分数0.5%TiO2所制备的成品膜具有较高的综合性能,其纯水通量可达1 030L/(m2·h·0.1MPa),对胃蛋白酶的截留率可达76%. 相似文献
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Recent advances and avenues for further research and development in three specific fields of membrane science and technology
are reviewed. The potential of membrane processes for gas separation has been considerably improved by the development of
new materials combining high permeability and selectivity. While working correlations between polymer structure and permeation
characteristics have been evolved, there is need to further develop our basic understanding of this relationship. The second
field reviewed is that of improving the separation characteristics of porous membrane filtration (ultra-/microfiltration).
Recent promising approaches include the fabrication of membranes with uniform porosities, new module configurations and the
manipulation of feed chemistries. The third area highlighted is that of hybrid membrane processes. These are considered both
as integrated processes in which the membrane process operates in conjunction with another unit operation or as a coupled
transport process in which the basic functioning of the membrane is intimately coupled with another physical or chemical process
in single unit operation. The scope for basic research in these fields is indicated. 相似文献
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膜分离技术在我国食品工业中的应用 总被引:7,自引:0,他引:7
介绍了膜分离技术在我国果汁饮料、发酵、酿造、大豆、乳制品、禽蛋、多糖、食用胶及保健品等食品加工领域的应用情况,并展望了膜分离技术在我国未来食品工业中的应用前景. 相似文献
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