Fabrication of porous chitosan membranes composed of nanofibers by low temperature thermally induced phase separation, and their adsorption behavior for Cu2+

被引：45

作者：

Qin, Wang ^{[1
]}

Li, Jixiang ^{[1
]}

Tu, Jianbing ^{[1
]}

Yang, Hongqin ^{[2
]}

Chen, Qinhui ^{[1
]}

Liu, Haiqing ^{[1
]}

机构：

[1] Fujian Normal Univ, Coll Mat Sci & Engn, Fujian Prov Key Lab Polymer Mat, Fuzhou 350007, Fujian, Peoples R China

[2] Fujian Normal Univ, Minist Educ, Key Lab Optoelect Sci & Technol Med, Fuzhou 350007, Fujian, Peoples R China

来源：

CARBOHYDRATE POLYMERS | 2017年 / 178卷

基金：

中国国家自然科学基金;

关键词：

Chitosan; Nanofibers; Porous material; Adsorption; Heavy metal cations; HEAVY-METAL ION; AQUEOUS-SOLUTION; CU(II) IONS; REMOVAL; EQUILIBRIUM; LEAD; ADSORBENTS; COPPER(II); KINETICS; CR(VI);

D O I：

10.1016/j.carbpol.2017.09.051

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Low temperature thermally induced phase separation (LT-TIPS) of chitosan solution was developed to fabricate porous chitosan membranes (p-CSMs), which were composed of short nanofibers with diameter of 40-60 nm. Compared to the conventional acetic acid/water solvent, a mixed solvent of acetic acid/ethanol/water was used to prepare chitosan solution. The effect of solvent composition, quenching temperature and time, and coagulant on the p-CSM morphology were systematically explored. The optimum conditions for fabricating p-CSM was to quench 2% chitosan/2% acetic acid in water/ethanol (70/30) at -20 degrees C for 12 h, followed by coagulating in 1% Na2CO3 in water/ethanol (50/50). The p-CSM was an effective adsorbent for Cu2+ and had a Langmuir adsorption capacity of 2.57 mmol/g, which is close to the adsorption capacity of natural and electrospun chitosan nanofibers. The p-CSM maintained 90% adsorption efficiency for Cu2+ even after six cycles.

引用

页码：338 / 346

页数：9

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