声电场强化超滤鲨鱼鳍软骨粘多糖

研究了以截留相对分子质量为20000的聚砜超滤膜，在不同外场（无机理场，存在电场，存在声场及存在声电场）的条件下，强化超滤鲨鱼鳍软骨粘多糖的膜通量和残留率的变化情况，结果显示，电场和声场等物理场强化超滤，均可提高带负荷电的粘多糖的膜通量和截流率，其中，又以声场和电场联合强化的膜通量提高的幅度最大，经凝胶渗透色谱分析透过液发现，无物理场和以声场强化超滤的透过液中主要含小分子组分，电场强化超滤的透过液中主要含大分子组分，而声电场联合强化超滤的透过渡中则同时含有大分子和小分子两种组分，并且含量都处于很低水平。

Ultrafiltration for Mucopolysaccharides of Shark Fin Enhanced by Acoustoelectric Fields

The flux and retention ratio characteristics for mucopolysaccharides through PES ultrafiltra-tion membrane with a relative molecular mass cut-off of 20 000 under electric field, acoustic field and acoustoelectric fields were investigated. The results demonstrated that all these physics fields can improve the flux and the retention ratio of membrane for acidic mucopolysaccharides with stronger negative charges. Among them, the acoustoelectric fields exert the strongest impact on the improvement of separation effect. By analyzing the ultrafiltration permeate of mucopolysaccharides with GPC, it was found that in cases where there was no extraneous physics field and when there was an acoustic field,the permeate of mucopolysaccharides mainly contained polysaccharides with small molecules. In case of electric field, the permeate were mainly of large molecules, while in case of acoustoelectric fields, the permeate contained both large and small molecules, although their total content were the lowest compared with other kinds of extraneous fields.