Chemical crosslinking reinforced flexible cellulose nanofiber-supported cryogel

被引：79

作者：

Cheng, Huan ^{[1
]}

Li, Yingzhan ^{[1
]}

Wang, Bijia ^{[1
]}

Mao, Zhiping ^{[1
]}

Xu, Hong ^{[1
]}

Zhang, Linping ^{[1
]}

Zhong, Yi ^{[1
]}

Sui, Xiaofeng ^{[1
]}

机构：

[1] Donghua Univ, Minist Educ, Key Lab Sci & Technol Ecotext, Shanghai 201620, Peoples R China

来源：

CELLULOSE | 2018年 / 25卷 / 01期

基金：

中国国家自然科学基金;

关键词：

CNF-supported cryogel; Crosslinking; PEI; Flexibility; Copper adsorption; CO2; CAPTURE; MAGNETIC MICROSPHERES; SURFACE MODIFICATION; THERMAL INSULATION; GRAPHENE OXIDE; AEROGELS; WATER; REMOVAL; ADSORBENT; CR(VI);

D O I：

10.1007/s10570-017-1548-7

中图分类号：

TB3 [工程材料学]; TS [轻工业、手工业、生活服务业];

学科分类号：

082905 [生物质能源与材料]; 140303 [工业设计];

摘要：

A robust and flexible cellulose nanofiber (CNF)-supported cryogel was prepared by chemical crosslinking method using gamma-glycidoxypropyltrimethoxysilane (GPTMS) and branched polyethylenimine (PEI). FT-IR, elemental analysis, EDS and solid state C-13 NMR analysis revealed that the PEI had been successfully modified on cellulose via reacting with GPTMS. The obtained flexible cryogel displayed a three-dimensional structure composed of thin sheet. The maximal shape recovery of the CNF-supported cryogel from a 50% compression strain was up to 93% of its original thickness. The cryogel contained abundant amino groups and proved to be efficient in removing Cu2+ from solution with a maximum Cu2+ uptake of 138 mg/g. The adsorption kinetics curve fitted the pseudo-second-order model and the equilibrium absorption capacity fitted the Langmuir model. Moreover, adsorption capacity of the cryogel was up to 75% after four adsorption-desorption cycles (15 days).

引用

页码：573 / 582

页数：10

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