多孔金属Ti-SiO_2复合膜的制备及在超滤分离蛋白质中的应用  

Preparation of porous metal Ti-SiO_2 composite membrane and its ultrafiltration and application in separation of corn protein and PGE

作　　者：张守臣[1] 王立秋[1] 刘长厚[1] 

机构地区：[1]大连理工大学化工学院化工技术研究所,大连116012

出　　处：《膜科学与技术》2002年第3期60-62,66,共4页Membrane Science and Technology

摘　　要：用溶胶 -凝胶技术控制硅凝胶颗粒的粒度 ,向烧结金属钛的微孔内嵌入不同粒度的凝胶颗粒 ,经 6次涂敷、陈化和烧结后 ,制成微孔金属钛 -SiO2 复合膜 ;将该膜用于超滤分离聚乙二醇 (PEG)和玉米蛋白水溶液 ,在过滤压差Δp =0 .3MPa时 ,对分子量 2 0 0 0 0的聚乙二醇 ,其稳定通量JP=8.4mL/ (cm2 ·h) ,截留率RP=92 .8%～ 93.4 % ;对玉米蛋白 ,其稳定通量JA=6 .7mL/ (cm2 ·h) ,截留率RA=95 .2 %～ 95 .6 % .The microporous composite membrane of metal Ti-SiO_2 was prepared successfully by means of applying sol-gel technique to control the particle size of silicon gel,embedding different particle size distribution of silicon gel into the micropores of the sintered titanium membrane materials and repeating the procedure of coating-aging-sintering for 6 times.Applying this composite membrane to the separation of ultrafiltrating the aqueous solution of polyethylene glycol(PEG)and corn protein, the stable permeation flux is 8.4 mL/(cm 2·h) and the rejection ratio is 92.8%～93.4%,when the differential pressure of ultrafiltration is 0.3 MPa,for the cut-off molecular weight of 20 000 PEG.But for the corn protein,the stable permeation flux is 6.7 mL/(cm 2·h) and the rejection is 95.2%～95.6%.

关 键 词：制备 分离 蛋白质 应用 烧结金属微孔管 Ti-SiO2复合膜 玉米蛋白 超滤 

分 类 号：TQ028.8[化学工程]