共查询到19条相似文献,搜索用时 62 毫秒
2.
综述了在制备高分子分离膜的过程中,非溶剂添加剂,无机盐添加剂,有机添加剂,复合添加剂等对膜的结构与性能的作用。 相似文献
3.
4.
6.
7.
膜分离技术作为一种新型化工分离单元,发展速度极快,无论在膜透过理论方面还是开发新膜材料及制膜工艺方面都取得了很大进展。文章对高分子分离膜的发展及分类、制备方法、分离机理和过程进行了综述,同时阐述了膜分离技术在工业中的应用及新型膜的开发与应用。相信高分子分离膜定能作为高效能材料而成为开发的萤点,并进一步获得发展。 相似文献
8.
含有机硅侧基的高分子在富氧膜材料中占有重要位置,本文简要评述了PTMSP、PTMSE等含有机硅侧基富氧膜材料的性能及研究进展,讨论了有机硅基对富氧膜材料透气性能的影响。 相似文献
10.
11.
12.
高聚物/陶瓷复合膜的气体渗透及分离行为 总被引:6,自引:0,他引:6
以实验室制备成功的SR/Ceramic和PPESK/Ceramic复合膜为基础,对O2、N2、H2、CO、CO2、CH4等气体在高聚物/陶瓷复合膜上的渗透性能进行研究;在较宽的温度范围内考察了复合膜的使用效果,并获得各种气体的渗透活化能及其与气体临界温度的关系;渗透活化能随临界温度的增大而增低。同时,以空气分离体系为对象,考察了膜分离器的操作参数q和pr对膜分离系统过程行为的影响;实验结果和理论分析一致。 相似文献
13.
《分离科学与技术》2012,47(2):354-359
Optically pure lactic acid that can be prepared by fermentation is one of the important raw materials for biodegradable polymer. Since an economical technique is desired that separates lactic acid from the fermentation broth, we proposed lactate permeation through a poly(vinyl chloride)(PVC)-based membrane containing ionic liquids as a carrier. Lactate was successfully permeated through polymer inclusion membranes (PIMs) containing Aliquat 336, Cyphos IL -101, and -102 as ionic liquids. From the viewpoints of permeation rates and the pH drop of the feed phase, Aliquat 336 was the best ionic liquid. Based on the experimental results, we calculated the overall mass transfer coefficients and evaluated the contribution of membrane resistance to the overall permeation resistance. Furthermore, permeation behavior was explained by the solution-diffusion model. The superior stability of PIMs over the supported ionic liquid membranes was observed for membranes containing Aliquat 336 as a carrier. The PVC-based membrane process containing Aliquat 336 was found to be promising for lactate separation on an industrial scale. 相似文献
14.
15.
Reproducible and controllable hydrophilic layers were grafted on macroporous PP membranes by surface initiated grafting. Two methods were adopted, i.e., through adsorption of or entrapping the photo‐initiator on the membrane surface. The latter method yielded longer grafted chains under otherwise identical conditions. Depending on monomer solution composition, brush layers or network‐like structures were grafted onto the entire membrane surface without significant loss of water flux. The influence of the structure of grafted layers on water permeation, protein adsorption, and protein microfiltration fluxes was investigated. It was found that membranes grafted with network‐like structures have the best performance.
16.
17.
利用微乳液聚合技术制备分离膜不仅拓展了膜材料的选择范围和成膜工艺技术,并为有机-无机杂化膜的制备提供了一种很好的方法。从微乳液的组成、乳化剂的性质等对微乳液聚合制备的分离膜结构和性能的影响方面,对微乳液聚合在分离膜制备中的应用研究进行了综述,并对其今后的研发方向进行了简要的评述。 相似文献
18.
根据文献报道和作者的工作实践,介绍了疏水微孔膜的主要制备方法,并对膜蒸馏等一些采用疏水微孔膜的新型膜分离过程进行了评述。 相似文献
19.
分离膜材料和膜制备技术的研究进展 总被引:1,自引:0,他引:1
膜分离技术在工业中已得到广泛的应用,它是最有发展前途的分离技术之一。综合介绍了无机膜材料、有机膜材料、液膜的研究进展,并介绍了各种膜制备技术的研究状况,提出今后在膜材料和膜制备技术方面需要优先研究的课题。 相似文献