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甲壳素黄原酸酯溶液浇铸在聚丙烯腈超滤膜上,并与戊二醛交联制得一种新型的荷负电复合纳滤膜,研究了复合膜的制备影响因素及操作条件对膜性能的影响。0．4MPa下制备的纳滤膜对1000mg/L Na_3PO_4、K_2SO_4、Na_2SO_4、MgSO_4、KCl、NaCl和MgCl_2的截盐率分别为90．25%、89．01%、85．15%、36．42%、32．60%、28．90%和15．81%。利用复合膜对PO_4~(3-)、SO_4~(2-)有较高的截留率．此膜可用于脱除PO_4~(3-)、SO_4~(2-)等阴离子及水的净化。
Chitin xanthate solution was cast on polyacrylonitrile ultrafiltration membrane and cross-linked with glutaraldehyde to prepare a new type of negatively charged composite nanofiltration membrane. The influence factors of the composite membrane preparation and the operating conditions on the membrane The impact of performance. The salt rejection rates of nanofiltration membranes prepared at 0.4MPa were 90.25%, 89.01%, 85.15% and 36.42% for 1000mg / L Na_3PO_4, K_2SO_4, Na_2SO_4, MgSO_4, KCl, NaCl and MgCl_2, respectively %, 32.60%, 28.90% and 15.81%. The composite membranes have higher rejection rates for PO_4 ~ (3 -) and SO_4 ~ (2-). This film can be used to remove PO_4 ~ (3 -), SO_4 ~ (2-) anion and water purification.