Silicalite-filled poly(siloxane imide) membranes for removal of VOCs from water by pervaporation
Silicalite-filled poly(siloxane imide) membranes for removal of VOCs from water by pervaporation
复制标题
硅沸石填充的聚硅氧烷酰亚胺膜，用于通过渗透蒸发去除水中的 VOC
DOI：
10.1016/j.memsci.2003.11.004
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发表时间：
2004
影响因子：
9.5
通讯作者：
Jian Xiao
中科院分区：
文献类型：
--
作者：
Q. Liu;Jian Xiao
制备了硅石填充的聚硅氧烷亚胺（PSI）膜，用于通过渗透蒸发从水中分离挥发性有机化合物（VOCs）。PSI共聚物是由3,3′，4,4′-二苯甲四甲酸二酐（BTDA）与含硅氧烷的二胺（如聚二甲基硅氧烷），端接双（3-氨基丙基）（PSX），加入3,3-二氨基二苯砜（DDS）缩聚而成。在浇注液中加入2,4,6-三胺嘧啶（TAP），以增强聚合物基体与填料硅石的相容性。用SEM对PSI膜进行了表征。添加TAP后膜的表面形态与未添加TAP时膜的表面形态不同。后者似乎是由膜表面的颗粒组成的。研究了PSI膜对氯仿/水溶液的吸附选择性，在50wt左右有最高的吸附选择性。%的PSX含量。通过对氯仿/水混合物的分离，研究了膜的渗透蒸发性能。厚度为120μm的硅石填充膜的总渗透通量为280gm−2h−1，对1.2wt的分离系数为52.2。%氯仿/水混合物。
Silicalite-filled poly(siloxane imide) (PSI) membranes were prepared for the separation of volatile organic compounds (VOCs) from water via pervaporation. PSI copolymer was synthesized by polycondensation of 3,3′,4,4′-benzophenonetetracarboxylic dianhydride (BTDA) with a siloxane-containing diamine, e.g., poly(dimethylsiloxane), bis(3-aminopropyl) terminated (PSX), added with 3,3-diaminodiphenyl sulfone (DDS). 2,4,6-Triamine pyrimidine (TAP) was added into the casting solution in order to enhance the compatibility between the polymeric matrix and the filler, silicalite. The PSI membranes were characterized by SEM. The surface morphology for the membrane with the addition of TAP differs from that without TAP. The latter seems to be consisting of particles in the membrane surface. The sorption selectivity of the PSI membranes for chloroform/water solutions was investigated, and there was a highest value for it around 50wt.% of PSX content. The pervaporation performance of the membranes was studied with the separation of chloroform/water mixture. The silicalite-filled membrane with 120μm thickness exhibit a high total permeation flux of 280gm−2h−1with separation factor of 52.2 for 1.2wt.% of the chloroform/water mixture.