DMI增塑二醋酸纤维素超滤膜的制备与性能研究

发布时间：2018-03-07 04:00

本文选题：醋酸纤维素　切入点：超滤膜　出处：《塑料科技》2017年04期 　论文类型：期刊论文

【摘要】：以绿色环保的1,3-二甲基-2-咪唑啉酮(DMI)为增塑剂,采用复合热致相分离法制备了二醋酸纤维素(CDA)超滤膜。通过扫描电子显微镜(SEM)观察以及纯水通量、牛血清白蛋白(BSA)截留率、孔隙率和拉伸强度等测试,研究了CDA固含量对超滤膜结构和性能的影响。同时,通过综合比较不同固含量CDA膜的纯水通量和蛋白截留率,确定了最佳铸膜液配方。结果表明:提高CDA的固含量可以消除膜截面中的大孔结构,但同时降低了膜的孔隙率。其中,当铸膜液中CDA固含量为20%时,所制备平板膜的拉伸强度高达6.10 MPa,对0.1 g/L BSA水溶液的渗透通量为47.7 L/(m~2·h),截留率达到96.4%。
[Abstract]:Cellulose diacetate (CDA) ultrafiltration membrane was prepared by a composite thermal phase separation method with a green environmental friendly dimethyl-dimethyl-2-imidazolinone (DMI) as plasticizer. The absorptivity of bovine serum albumin (BSA) was observed by scanning electron microscopy (SEM), and the water flux was determined by scanning electron microscopy (SEM), and the retention rate of bovine serum albumin (BSA) was determined by scanning electron microscopy (SEM). The effects of solid content of CDA on the structure and properties of ultrafiltration membrane were studied by measuring porosity and tensile strength. Meanwhile, the pure water flux and protein retention rate of CDA membrane with different solid content were compared synthetically. The results show that increasing the solid content of CDA can eliminate the macroporous structure in the membrane section, but at the same time reduce the porosity of the membrane. The results show that when the solid content of CDA in the casting solution is 20%, The tensile strength of the membrane is 6.10 MPA, the permeation flux of 0.1 g / L BSA aqueous solution is 47.7 L / L / L BSA 2 路h ~ (-1), and the rejection rate is 96.4m ~ (-1).
【作者单位】：贵州大学材料与冶金学院;国家复合改性聚合物材料工程技术研究中心;贵州省材料产业技术研究院;
【基金】：贵州省科学技术基金(黔科合J字[2015]2078) 贵州省工业攻关项目(黔科合GZ字[2014]2010) 贵州省社会攻关项目(黔科合SY字[2015]3016) 贵州省高层次人才项目(黔科合人才[2015]4038)
【分类号】：TQ051.893

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