关键词: 季铵化壳聚糖  ,  , 聚苯乙烯微乳液 ,  , 交联 ,  , 阴离子交换膜

Abstract: The quaternized chitosan (QCS) was synthesized through the nucleophilic substitution reaction under the conditions was that the chitosan was material and the 2, 3epoxypropyl trimethyl ammonium chloride was etherifying agents. Dutch positive electricity glomerular polystyrene (PS) microemulsion was synthesized through the emulsion polymerization method and the hexadecyl trimethyl ammonium bromide was cationic quaternary ammonium salt and the potassium persulfate was initiator. Then the anion exchange membrane was synthesized by take the QCS as material and glutaraldehyde as crosslinking agent, at the same time the PS microemulsion was doping into the casting solution. The standard membrane structure was characterized by FTIR. The content of PS microspheres and glutaraldehyde influence on QCS/PS membrane’s water content and ionexchange capacity, etc properties. The results show that the crosslinking agent can effectively inhibit the QCS membrane’s deformation. When the quality percentage of PS microsphere was 35%, swelling ratio was reduced from 68.5% to 25.8% with the increase of crosslinking degree. But at the same time it reduce the QCS/PS membrane’s ionexchange capacity. And PS microspheres will be improved QCS/PS membrane ionexchange capacity, swelling ratio also will be reduced slightly. The water content is 65% and ionexchange capacity is 4.89 mmol/g when the crosslinking degree was 5% and the quality percentage of PS microsphere was 35%. QCS/PS membrane’s overall performance can be optimized.

Key words: Quaternized chitosan,    ,  Polystyrene microemulsion,    ,  Crosslinking,    ,  Ion exchange membrane