用于纳滤技术脱盐的复合聚砜膜的合成与表征。

Synthesis and characterization of composite polysulfone membranes for desalination in nanofiltration technique.

机构信息

Institute of Nanoscience and Nanotechnology, University of Kashan, Kashan, I.R. Iran.

出版信息

Water Sci Technol. 2010;62(11):2655-63. doi: 10.2166/wst.2010.512.

DOI:10.2166/wst.2010.512

Abstract

Composite nanofiltration (NF) membrane was developed polyacrylic acid (PAA) in situ UV graft polymerization process using ultrafiltration (UF) polysulfone (PSF) membrane as porous support. FT-IR spectra indicated that grafting was performed and it show peaks at 1,732 cm⁻¹ and 3,396 cm⁻¹ region for CO and OH starching bond of acrylic acid (AA) monomer, respectively. AFM microscopy showed the roughness of surface was reduced by increase of UV irradiation times. Effect of irradiation time on the grafting of acrylic acid (AA) in the same concentration was discussed. The salts rejection increase was accompanied with grafting of polysulfone (PSF) ultrafiltration (UF) membrane. The rejection of Na₂SO₄, MgSO₄, NaCl and CaCl₂ salts by PSF-grafted-PAA nanofiltration (NF) membrane was in 98, 60, 52 and 30% respectively, under 0.3 MPa.

摘要

复合纳滤 (NF) 膜是通过超滤 (UF) 聚砜 (PSF) 膜原位紫外光接枝聚合过程制备的聚丙烯酸 (PAA)。FT-IR 谱表明接枝反应已经进行，并且在 1732 cm-1 和 3396 cm-1 处分别出现了 CO 和 OH 淀粉键的峰，这是丙烯酸 (AA) 单体的特征峰。原子力显微镜 (AFM) 显微镜显示表面粗糙度随着 UV 照射时间的增加而降低。讨论了相同浓度下丙烯酸 (AA) 接枝的辐照时间对其的影响。随着聚砜 (PSF) 超滤 (UF) 膜接枝的增加，盐的截留率也随之增加。PSF 接枝 -PAA 纳滤 (NF) 膜对硫酸钠、硫酸镁、氯化钠和氯化钙盐的截留率分别为 98%、60%、52%和 30%，在 0.3 MPa 下。