Water/acetone permeability of porous hollow-fiber membrane containing diethylamino groups on the grafted polymer branches.
Water/acetone permeability of porous hollow-fiber membrane containing diethylamino groups on the grafted polymer branches.
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接枝聚合物支链上含有二乙氨基的多孔中空纤维膜的水/丙酮渗透性。
DOI：
10.1016/0376-7388(92)85001-y
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发表时间：
1992
影响因子：
9.5
通讯作者：
I. Ishigaki
中科院分区：
文献类型：
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作者：
S. Tsuneda;Kyoichi Saito;S. Furusaki;T. Sugo;I. Ishigaki
通过接枝聚合甲基丙烯酸缩水甘油酯（GMA）和随后的官能化两个反应将二乙酰氨基（DEA）基团引入到具有0.34微米的标称孔径和71%的孔隙率的多孔中空纤维膜中。接枝链形成在孔表面和聚合物基体的无定形域，并均匀地分布在整个膜。迫使水和丙酮渗透穿过多孔膜，其DEA基团密度范围高达6.7摩尔/千克起始中空纤维膜，具有100%恒定的GMA接枝度。接枝链上的DEA基团的密度引起构象变化，从而改变膜的渗透性。纯水通量曲线在环氧基团与DEA基团的转化率为40 - 60%时急剧下降。丙酮通量曲线在20%转化点附近具有最大值。具有低于20%的转化率的含DEA基团的膜在丙酮中比在水中表现出更高的溶胀。这是由于接枝链的溶胀侵入无定形域。
Dietylamino (DEA) groups were introduced into a porous hollow-fiber membrane having a nominal pore size of 0.34 micrometer and porosity of 71% via two reactions: graft polymerization glycidyl methacrylate (GMA) and subsequent functionalization. The graft chains were formed both on the pore surface and in the amorphous domain of the polymer matrix, and were distributed uniformly throughout the membrane. Water and acetone were forced to permeate across the porous membrane the DEA group density of which ranged up to 6.7 mol per kg of the starting hollow fiber membrane with a 100% constant degree of GMA grafting. The density of the DEA groups on the graft chains induced conformational changes which altered the permeability of the membrane. The pure water flux curve exhibited a sharp decrease at a conversion ratio of the epoxide group to the DEA group between 40 and 60%. The acetone flux curve had a maximum value near the 20% conversion point. The DEA-group-containing membrane, with a conversion below 20%, showed a higher swelling in acetone than in water. This is due to the swelling of the graft chains invading the amorphous domains.
Satoshi Tsuneda、Kyoichi Saito、Shintaro Furusaki：“使用螯合中空纤维膜的金属收集”J. Membrane Sci.58。
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