文献类型：期刊文献

英文题名：Effects of nanocellulose on sodium alginate/polyacrylamide hydrogel: Mechanical properties and adsorption-desorption capacities

作者：Yue, Yiying[1] Wang, Xianhui[1] Han, Jingquan[2] Yu, Lei[1] Chen, Jianqiang[1] Wu, Qinglin[3] Jiang, Jianchun[4,5]

第一作者：Yue, Yiying

通信作者：Yue, YY[1]

机构：[1]Nanjing Forestry Univ, Coll Biol & Environm, Nanjing 210037, Jiangsu, Peoples R China;[2]Nanjing Forestry Univ, Coll Mat Sci & Engn, Nanjing 210037, Jiangsu, Peoples R China;[3]Louisiana State Univ, Sch Renewable Nat Resources, Agr Ctr, Baton Rouge, LA 70803 USA;[4]Nanjing Forestry Univ, Coll Chem Engn, Nanjing 210037, Jiangsu, Peoples R China;[5]Chinese Acad Forestry, Inst Chem Ind Forest Prod, Nanjing 210042, Jiangsu, Peoples R China

年份：2019

卷号：206

起止页码：289-301

外文期刊名：CARBOHYDRATE POLYMERS

收录：;EI(收录号：20184706106830);Scopus(收录号：2-s2.0-85056581461);WOS:【SCI-EXPANDED(收录号:WOS:000452982700033)】；

基金：This work was supported by the National Natural Science Foundation of China (31770609, 51778298), the Natural Science Foundation of Jiangsu Province for Outstanding Young Scholars (BK20180090), the Natural Science Research Project of Jiangsu Province (17KJB220007), the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD), and the Analysis and Test Center of Nanjing Forestry University.

语种：英文

外文关键词：Hydrogel; Nanocellulose; Interpenetrating polymer network; Mechanical properties; Viscoelasticity; Adsorption

摘要：In this study, interpenetrating polymer network (IPN)-structured hydrogels were fabricated through the cross-linking of neutral polyacrylamide (PAM, the first flexible network) and the polyelectrolyte sodium alginate (SA, the second rigid network). Three types of nanocellulose, including cellulose nanocrystals (CNCs), bacterial cellulose fibers (BCs) and 2,2,6,6-tetramethylpiperidine-1-oxy radical (TEMPO)-oxidized cellulose nanofibers (TOCNs), were well-dispersed in the SA-PAM gel matrix. The hydrogels, obtained with a high water content (similar to 83%), exhibit a macroporous structure with a mean pore size of 60 +/- 51 mu m and high transparency. Comparative studies indicate that BCs are more effective for enhancing the hydrogels due to their higher aspect ratio, and the compressive strength of SA-PAM-BC hydrogel is 6.59 times higher than that of neat SA-PAM. Meanwhile, TOCNs are the best fillers for improving the adsorption capacity owing to the presence of a carboxyl group, and the adsorption capacity of SA-PAM-TOCN is more than 1.3-fold that in SA-PAM. Prepared hydrogels with high mechanical strength and adsorption capacity are advantageous for their applications in wastewater treatments.