PVDF超滤膜的制备及其分离大豆蛋白的条件优化  

Preparation of polyvinylidene fluoride ultrafiltration membrane and its application in separation of soybean proteins

作　　者：燕龙龙 叶茜[2] 严滨[2] 魏晓楠 杜翠红[1,4] 

机构地区：[1]集美大学食品与生物工程学院,福建厦门361021 [2]厦门理工学院厦门市膜技术研发与应用重点实验室,福建厦门361024 [3]福建省食品微生物与酶工程重点实验室,福建厦门361021 [4]福建省水产品深加工工程研究中心,福建厦门361021

出　　处：《食品工业科技》2014年第12期236-239,302,共5页Science and Technology of Food Industry

基　　金：厦门市科技计划项目(3502Z20133031);厦门理工学院对外合作与交流专项(dw009)

摘　　要：以聚偏氟乙烯(PVDF)为材料,利用浸没沉淀相转化法制备超滤膜,以水通量、孔隙率、截留率等对膜进行表征。结果表明,所制备的膜孔径较均一,在0.7MPa操作压力下,其水通量可达350L/m2·h以上,其孔隙率维持在80%左右,对牛血清白蛋白(BSA)的截留率在90%以上,而对聚乙二醇20000的截留率仅为5%左右。单因素与正交实验结果表明,当温度为50℃、pH=9、操作压力为0.5MPa及料液浓度为240μg/mL,膜的通量最大,对大豆蛋白的截留率可达96.25%。The polyvinylidene fluoride ultrafiltration membrane was prepared by the immersion phase inversion process,and its characterization was investigated by measuring the water flux and porosity of the membrane, its retention of different molecular weights. The results showed that the water flux of the membrane was 350L/m2. h, its porosity was around 80%, under 0.7MPa, its retention to bovine serum albumin （BSA） and polyethylene glycol（PGE） 20000 were over 90% and only 5%,respectively. By optimizing process conditions such as temperature,pH,operating pressure and material liquid concentration conditions,the retention of the membrane to the soybean proteins reached 96.25% under the temperature was 500（3, pH=9,operating pressure was 0.5MPa and slurry concentration to 240μg/mL

关 键 词：聚偏氟乙烯超滤膜 浸没沉淀 大豆蛋白 膜分离 

分 类 号：TS201.1[轻工技术与工程—食品科学]