文献类型：期刊文献

英文题名：Nanocellulose/Poly(2-(dimethylamino) ethyl methacrylate) Interpenetrating polymer network hydrogels for removal of Pb(II) and Cu(II) ions

作者：Li, Jian[1] Xu, Zhaoyang[2] Wu, Weibing[1] Jing, Yi[1] Dai, Hongqi[1] Fang, Guigan[3]

第一作者：Li, Jian

通信作者：Wu, WB[1]

机构：[1]Nanjing Forestry Univ, Jiangsu Prov Key Lab Pulp & Paper Sci & Technol, Jiangsu Coinnovat Ctr Efficient Proc & Utilizat F, 159 Longpan Rd, Nanjing 210037, Jiangsu, Peoples R China;[2]Nanjing Forestry Univ, Coll Mat Sci & Engn, 159 Longpan Rd, Nanjing 210037, Jiangsu, Peoples R China;[3]Chinese Acad Forestry, Inst Chem Ind Forestry Prod, Nanjing 210042, Jiangsu, Peoples R China

年份：2018

卷号：538

起止页码：474-480

外文期刊名：COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS

收录：;EI(收录号：20174804458244);Scopus(收录号：2-s2.0-85034825098);WOS:【SCI-EXPANDED(收录号:WOS:000418586600056)】；

基金：The support of this work by the National Key Basic Research Program (2017YFD0601005), Natural Science Foundation of Jiangsu Province (BK20171450), and National Natural Science Foundation of China (31370583, 31470599, 31770607) is gratefully acknowledged.

语种：英文

外文关键词：Nanocellulose; Interpenetrating polymer network hydrogel; pH-sensitivity; Thermosensitivity; Adsorption

摘要：Interpenetrating network (IPN) hydrogels based on nanofibrillated cellulose (NFC) and poly(2-(dimethylamino) ethyl methacrylate) (PDMAEMA) were prepared via crosslinking free radical polymerization. Attenuated total reflection-Fourier transform infrared spectroscopy (ATR-FTIR) and thermogravimetric analysis (TGA) confirmed the formation hybrid network of NFC and PDMAEMA. The IPN hydrogels possess uniform pore structure and high porosity (> 97%). The specific surface area and compressive strength were higher than 82 m(2) g(-1) and 1.26 kPa, respectively. Water swelling experiments showed that the IPN hydrogels were both pH-sensitive and temperature-sensitive. The swelling of hydrogels was limited at high temperature and in neutral medium. There was an increase in the swelling ratio as the NFC content increased. Adsorption kinetic and thermodynamics studies of Cu(II) and Pb(II) explained pseudo-second-order equation and Langmuir model (R-2 > 0.99) as the best fit. The maximum adsorption capacities of Cu(II) and Pb(II) according to Langmuir model were 217.39 mg/g and 81.96 mg/g, respectively. The good adsorption performance can be attributed to the chelation of tertiary amine groups and the ion-exchange of carboxyl groups.