γ-(2,3环氧丙氧)丙基三甲氧基硅烷改性海藻酸钠和明胶渗透蒸发杂化膜的制备及乙酸脱水性能研究

Dehydration of Acetic Acid by Pervaporation Using γ-glycidoxypropyl Trimethoxy-silane(GLYMO) Modified Sodium Alginate and Gelatin Blending Hybrid Membrane

通过硅烷偶联剂对海藻酸钠-明胶共混膜进行交联改性制备乙酸脱水渗透蒸发杂化膜。实验结果表明:随着偶联剂含量的增加,杂化膜的对水的选择性先增加后下降,在3 wt%时有最好的选择性,同时膜的渗透通量随着偶联剂含量增加而增大;膜的选择性随着进料乙酸浓度增大而增大,通量随着进料乙酸浓度增大而减少。

Sodium alginate and gelatin blending hybrid membrane was prepared using γ-glycidoxypropyl-trimethoxysilane（GLYMO） as crosslinking agent,and used for dehydration of acetic acid.Pervaporation results showed that permeation selectivity obtained the maximum when the GLYMO content was 3 wt%,however,the flux increased with the increase of GLYMO content;permeation selectivity increased,however,permeation flux decreased with the increase of acetic acid concentration.