交联壳聚糖共混膜醇水混合液分离性能研究  

Pervaporation of water alcohol through crosslinked poly(ethylene glycol)(PEG)/chitosan(CS)blend membrane

作　　者：王新平[1] 张富尧[1] 沈之荃[1] 

机构地区：[1]浙江大学高分子系

出　　处：《膜科学与技术》1996年第3期62-67,共6页Membrane Science and Technology

基　　金：浙江省科委资助

摘　　要：研究了醇水混合液体系在经交联的聚乙二醇／壳聚糖共混膜中的渗透蒸发分离性能．讨论了共混膜组成、料液浓度和温度、膜下侧压力等对渗透蒸发性能的影响．结果发现聚乙二醇的掺入能大大提高壳聚糖膜的渗透通量，但分离因子降低．当料液乙醇质量分数为８０％时，渗透通量及分离因子都随温度的升高而增加．料液中加入少量ＺｒＯＣｌ２能把分离因子从原来的８．８提高到７４．同时发现膜下游侧压力不仅仅影响渗透组分在膜表面的蒸发，还影响整个渗透蒸发传质过程．Pervaporation behaviors of EtOH H 2O,n PrOH H 2O and i PrOH H 2O mixtures through PEG/CS blend membrane crosslinked with glutaraldehyde at the concentration of 4×10 -6 mol/g CS was investigated.The selectivity of the blend membrane was greatly improved when ZrO 2+ was present in the ethanol water mixture.Studying the effect of down stream pressure on pervaporation properties,we found that the permeation of water and alcohol through the PEG/CS blend membrane were controlled by different step.

关 键 词：渗透蒸发 壳聚糖 膜分离 醇水分离 

分 类 号：TQ028.8[化学工程]