Two-dimensional cellulose acetate membrane-supported mesoporous silica nanosheets for efficient nanosize-based molecules separation

被引:0
|
作者
Wei, Yingying [1 ]
Du, Qian [1 ]
Wang, Yang [2 ]
Gao, Pengcheng [1 ]
Wang, Zhifei [1 ]
Jiang, Yong [1 ]
机构
[1] Southeast Univ, Sch Chem & Chem Engn, Chem Bldg,Room 228 O,533 Lab,2 Dongnandaxue Rd, Nanjing 211189, Jiangsu, Peoples R China
[2] Jiangsu Univ Sci & Technol, Sch Mat Sci & Engn, Zhenjiang 212100, Jiangsu, Peoples R China
关键词
Mesoporous silica nanosheets; Filter membrane; Nanosize-based molecules; Proteins purification; MAGNETIC SEPARATION; PROTEIN ADSORPTION; FILMS; PURIFICATION; REMOVAL; DESIGN;
D O I
10.1016/j.molliq.2022.119827
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Membrane separation technology plays an important role in nanosize-based molecules separation. The two-dimensional mesoporous membranes have attracted considerable attention for nanosize-based molecules separation. In this work, unsupported mesoporous silica nanosheets (MSNS) were prepared by the growth of template at the water/n-hexane interface using surfactant of cetyl trimethyl ammonium bromide (CTAB) micelles as templates. During the preparation process, the surfactant CTAB was removed to obtain pure two-dimensional MSNS through be washed with ethanol, followed by freeze-drying. The two-dimensional MSNS had uniform nano-pores structure, ultra-thin thickness and high surface area. The pore diameter of MSNS could be controlled by changing the concentration of n-hexane (4-10 nm). By depositing 0.50 mg of MSNS on cellulose acetate (CA) membrane, the CA-MSNS membrane could be used to purify nanosize-based molecules (such as proteins). When the CA-MSNS membranes was used to filter cytochrome c (cyt c) solution and ovalbumin (OVA) solution respectively, 93.46% of cyt c and 47.27% of OVA could pass the CA-MSNS membranes. However, after four times of filtration, OVA molecules were almost completely blocked and cyt c with purity of 99% could be obtained. Moreover, 92.23% of OVA molecules could be recycled through the elution from the surface of CA-MSNS membranes. The results indicated that two-dimensional CA-MSNS membranes had great application potential in the purification of nanosize-based molecules. (C) 2022 Published by Elsevier B.V.
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页数:11
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