【摘要】 研究用羟烷基醋酸纤维素制成的超滤膜及其传递性质。在0.2MPa压力下,膜的截留率为92.10％～99.93％(0.05％BSA溶液),透水率为25.9～91.5ml/cm~2·h。讨论了聚合物浓度用不同官能团的有机物作第二添加剂时,其蒸发时间和凝胶介质种类,凝胶溚温度与膜性能的关系。实验结果表明,当选用能与聚合物形成氢键的有机物作第二添加剂时,由于聚合物在溶剂中的溶介能力增加可改善膜性能。更多还原

【Abstract】 (Guangzhou Chemical Institute ChineseAcademy of Science)[Abstract] Ultrafiltration membranes casted from hydroxy alkyl cellulose acetate polymers and their transport properties were studied. The rejection of the membranes is greater than 92% (0.05% BSA solution;and water flax greater than 25mL/cm2h under the 0.2 MPa operating pressure. The dependence of membranes performance among the polymer concentration, the evaporative time, the kind of coagulating agent and the temperature of coagulating bath were discussed, when the organic compounds containing different functional groups were used as the second additives. The results showed that if these organic compounds with formative ability of hydrogen bond to polymer were selected, the membrane performances were improved, becaus; of the increase of solution ability of polymer in solvents更多还原