화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of Industrial and Engineering Chemistry, Vol.109, 568-577, May, 2022
DOI10.1016/j.jiec.2022.02.046  Export Citation
Fabrication of PVDF-blended ultrafiltration membranes incorporated by chiral mesoporous silica for enantioseparation
Ting Wang, Xiao-xing Huang, Li-guang Wu†, Chun-juan Li, and Dong-feng Zhu1
  • School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310012, China
  • 1Zhejiang Institute of Standardization, Hangzhou 310018, China
E-mail:
Novel poly(vinylidene fluoride) (PVDF) ultrafiltration membranes blending with chiral mesoporous SiO2 materials were constructed to improve the anti-fouling and separation performance of PVDF-blended membranes. The formation of asymmetric mesoporous structure of chiral mesoporous SiO2 caused their large hydrophilic surface and significant chiral features, which enhanced the hydrophilicity and polarity of the resulting PVDF membranes blended with chiral mesoporous SiO2. So, the PVDF-blended membranes containing chiral mesoporous SiO2 had a high permeation performance and anti-fouling property. After blending with chiral mesoporous SiO2, the maximum flux of membranes exceeded 500 L·m-2·h-1 and was 6.5-fold higher than that of neat PVDF. Due to the stereo-specific interaction between enantiomers and chiral recognition sites introduced by chiral mesoporous SiO2 in the membranes, all PVDF-blended membranes had evident enantioseparation performance for DL-racemic tryptophan. The C-SiO2-20/PVDF-blended membranes had the highest enantioseparation performance under the same addition content and the maximum enantiomeric excess (e.e.%) was more than 20 %. Given the strong stereo-specific interaction and hydrogen bonding between d-tryptophan and b-cyclodextrin (b-CD), the addition of more b-CD would introduce more chiral recognition sites into the membranes, thereby enhancing the enantioseparation performance of the membranes for d-tryptophan. The maximum e.e. % of C-SiO2-20/b-CD/PVDF-blended membranes for the tryptophan enantiomer reached 55%.
Keywords:Ultrafiltration;Mixed-matrix membranes;Chiral mesoporous SiO2;Enantioseparation;PVDF
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