褐藻胶是一种亲水性天然高分子化合物，具有良好的增稠性、凝胶性和成膜性。
Alginate is a hydrophilic natural high molecular compound has good thickening, gelling and film forming properties.
水是由亲水性的离子化通道扩散透过膜，而乙醇是由亲油性的高分子无定形区扩散透过膜；
Water diffusion is localized in the hydrophilic ionic region formed by the ionized groups, whereas ethanol diffusion is localized in the hydrophobic amorphous network of the polymeric membrane.
本文着重综述了目前常用的高分子分离膜材料的改性方法。表面活性剂改性法可以改善膜表面的亲水性，提高了膜的通量；
The modification methods of polymer membrane materials was reviewed. In order to improve hydrophile and flux of membrane , it can be use the surfactant modified membrane.
本文着重综述了目前常用的高分子分离膜材料的改性方法。表面活性剂改性法可以改善膜表面的亲水性，提高了膜的通量；
The modification methods of polymer membrane materials was reviewed. In order to improve hydrophile and flux of membrane , it can be use the surfactant modified membrane.
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