文献类型：期刊文献

英文题名：Temperature and pH Responsive Hydrogels Using Methacrylated Lignosulfonate Cross-Linker: Synthesis, Characterization, and Properties

作者：Jin, Can[1,2] Song, Wenjia[2] Liu, Tuan[2] Xin, Junna[2] Hiscox, William C.[3] Zhang, Jinwen[2] Liu, Guifeng[1] Kong, Zhenwu[1]

第一作者：金灿;Jin, Can

通信作者：Kong, ZW[1];Xin, JN[2];Zhang, JW[2]|[a0005be4642aed69bf127]孔振武;

机构：[1]Chinese Acad Forestry, Inst Chem Ind Forest Prod, Natl Engn Lab Biomass Chem Utilizat, Nanjing 210042, Jiangsu, Peoples R China;[2]Washington State Univ, Composite Mat & Engn Ctr, Sch Mech & Mat Engn, POB 641806, Pullman, WA 99164 USA;[3]Washington State Univ, Nucl Magnet Resonance Ctr, POB 4630, Pullman, WA 99164 USA

年份：2018

卷号：6

期号：2

起止页码：1763-1771

外文期刊名：ACS SUSTAINABLE CHEMISTRY & ENGINEERING

收录：;EI(收录号：20180704779577);Scopus(收录号：2-s2.0-85041469533);WOS:【SCI-EXPANDED(收录号:WOS:000424728300031)】；

基金：This work was supported by the National Natural Science Foundation of China (No. 31400516) and Fundamental Research Funds for the Central Nonprofit Research Institution of Chinese Academy of Forestry (No. CAFYBB2014QB043).

语种：英文

外文关键词：Lignosulfonate; Hydrogel; Temperature-sensitive; pH-sensitive; Cross-linker

摘要：In this work, biobased hydrogels with temperature and pH responsive properties were prepared by copolymerizing N-isopropylacrylamide (NIPAM), itaconic acid (IA), and methacrylated lignosulfonate (MLS), where the multifunctional MLS served as a novel macro-cross-linker. The network structures of the lignosulfonate-NIPAM-IA hydrogels (LNIH) were characterized and confirmed by elemental analysis, Fourier transform infrared, and C-13 nuclear magnetic resonance. The equilibrium swelling capacity of the LNIH hydrogel decreased from 31.6 to 19.1 g/g with MLS content increasing from 3.7 to 14.3%, suggesting a strong dependence of water absorption of the gel on MLS content. LNIH hydrogels showed temperature sensitive behaviors with volume phase transition temperature (VPTT) around the body temperature, which was also influenced by MLS content. Moreover, all LNIH hydrogels exhibited pH sensitivity in the range of pH 3.0 to 9.1. Rheological study indicated that mechanical strength of the gel also increased with MLS content. The results from this study suggest that lignosulfonate derivative MLS is a potential feedstock serving both water-absorbing moiety and cross-linker for preparation of biobased smart hydrogels.