文献类型：期刊文献

英文题名：Combination of acid treatment and dual network fabrication to stretchable cellulose based hydrogels with tunable properties

作者：Niu, Li[1,2,3,4] Zhang, Daihui[1,2,3,4,5] Liu, Yupeng[1,2,3,4,5] Zhou, Xi[1,2,3,4,5] Wang, Jifu[1,2,3,4,5] Wang, Chunpeng[1,2,3,4,5] Chu, Fuxiang[1,2,3,4]

第一作者：Niu, Li

通信作者：Zhang, DH[1];Wang, CP[1]|[a00059c51513eb073c331]王春鹏;

机构：[1]Chinese Acad Forestry, Inst Chem Ind Forest Prod, Nanjing 210042, Jiangsu, Peoples R China;[2]Natl Engn Lab Biomass Chem Utilizat, Nanjing 210042, Jiangsu, Peoples R China;[3]Natl Forestry & Grassland Adm, Key Lab Chem Engn Forest Prod, Nanjing 210042, Jiangsu, Peoples R China;[4]Key Lab Biomass Energy & Mat, Nanjing 210042, Jiangsu, Peoples R China;[5]Nanjing Forestry Univ, Coinnovat Ctr Efficient Proc & Utilizat Forest Re, Nanjing 210037, Jiangsu, Peoples R China

年份：2020

卷号：147

起止页码：1-9

外文期刊名：INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES

收录：;Scopus(收录号：2-s2.0-85077659007);WOS:【SCI-EXPANDED(收录号:WOS:000525864700001)】；

基金：We acknowledge the support from National Key Research and Development Program of China (2017YFE0106800), Jiangsu Key laboratory for biomass energy and materials (JSBEM-S-201901), and National Natural Science Foundation of China (31890774) and the Provincial Academy of Forestry Science and Technology Cooperation Project of Zhejiang Province (2016SY11).

语种：英文

外文关键词：Cellulose; Hydrogels; Dual network; Acid treatment; Improved properties

摘要：Cellulose based hydrogels with a relatively high stretchability were fabricated in the NaOH/urea system via sequential chemical crosslinking and dual network fabrication. The first step involved crosslinking of cellulose using epichlorohydrin as a crosslinker. Cryo-electron microscopy analysis revealed the utilization of diluted acid to treat hydrogels significantly affected the morphology of the first network and improved the mechanical properties. After diffusion of precursors into the first network, the dual network hydrogels were generated after the UV light-initiated polymerization. Raman spectroscopy demonstrated a spatial distribution of second networks within the first network. The compression strength of hydrogels synthesized under the optimized conditions was effectively enhanced from 0.04 MPa to 10.9 MPa. In addition, the tensile properties of hydrogels were easily adjusted via copolymerization of acrylic acid with acrylamide. The highest strain could reach 219.5% with a tensile strength of 1.4 MPa. This work provides a promising and simple strategy to develop a cellulose based hydrogel with enhanced and tunable mechanical properties for wide applications. (C) 2020 Elsevier B.V. All rights reserved.