磺化纤维素纳米纤维多孔膜支撑的高通量纳滤膜的制备及脱盐性能

以细菌纤维素为原材料,先后通过NaIO₄和NaHSO₃氧化还原反应制备了表面部分磺酸化的细菌纤维素(SBC)纳米纤维.利用SBC纳米纤维多孔膜替代传统的超滤膜作为支撑底膜,结合界面聚合反应调控制得复合纳滤膜,并对其纳滤性能进行研究.结果表明,制备得到了对Na₂SO₄和MgSO₄具有高截留率(>96%)和超高分离通量(>320 L·m^-2·h^-1·MPa^-1)的新型纳滤膜.

Sulfonated Cellulose Nanofibers Film Supported Nanofiltration Membrane for High-flux and High-rejection Desalination

Sulfonated bacterial cellulose(SBC)nanofibers were prepared%via%oxidation-reduction reaction of NaIO 4 and NaHSO 3.Using this SBC nanofibers film as a new support porous membrane,high performance nanofiltration membrane with highly crumpled polyamide selective layer was prepared via interfacial polymerization between piperazine(PIP)and trimesoyl chloride(TMC).This novel nanofiltration membrane exhibits a superior desalination performance with a high rejection rate of 98.6%and a high permeance of 320L·m^-2·h^-1·MPa^-1to 1 g/L Na 2SO 4.The new nanofiltration membrane has a wide application prospect in desalination.