文献类型：期刊文献

英文题名：Metal ion and hydrogen bonding synergistically mediated carboxylated lignin/cellulose nanofibrils composite film

作者：Luo, Dan[1] Sun, Gaofeng[1] Wang, Yilin[1] Shu, Xuan[1] Chen, Jie[1] Sun, Mengya[1] Liu, Xiuyu[2] Liu, Chao[1] Xiao, Huining[4] Xu, Tingting[1] Dai, Hongqi[1] Zhou, Xuelian[3] Huang, Chen[3] Bian, Huiyang[1]

第一作者：Luo, Dan

通信作者：Bian, HY[1];Huang, C[2]

机构：[1]Nanjing Forestry Univ, Jiangsu Coinnovat Ctr Efficient Proc & Utilizat Fo, Int Innovat Ctr Forest Chem & Mat, Nanjing 210037, Peoples R China;[2]Guangxi Minzu Univ, Key Lab Chem & Engn Forest Prod, Guangxi Key Lab Chem & Engn Forest Prod, State Ethn Affairs Commiss, Nanning 530006, Peoples R China;[3]Chinese Acad Forestry, Inst Chem Ind Forest Prod, Jiangsu Prov Key Lab Biomass Energy & Mat, Nanjing 210042, Peoples R China;[4]Univ New Brunswick, Dept Chem Engn, Fredericton, NB E3B 5A3, Canada

年份：2024

卷号：323

外文期刊名：CARBOHYDRATE POLYMERS

收录：;EI(收录号：20234014836687);Scopus(收录号：2-s2.0-85173022349);WOS:【SCI-EXPANDED(收录号:WOS:001091684300001)】；

基金：This work was funded by the National Natural Science Foundation of China (grant number 22208163, 22208161) , Key Laboratory of Chemistry and Engineering of Forest Products, State Ethnic Affairs Commission, Guangxi Key Laboratory of Chemistry and Engineering of Forest Products (grant number GXFK2206) , Postgraduate Research & Practice Innovation Program of Jiangsu Province (SJCX22_0320) and the National College Students Innovation and Entrepreneurship Training Program (202310298057Z) .

语种：英文

外文关键词：Cellulose nanofibrils; Carboxylated lignin nanoparticles; Composite film; Hydrogen bonding; Metal ion cross-linking

摘要：In order to alleviate the resource and environmental problems caused by plastic film materials, the development of biodegradable cellulose-based films is crucial. Inspired by the strengthening mechanism of cellulose-lignin network from wood, carboxylated lignin (CL) was isolated using maleic acid (MA) pretreatment catalyzed by metal chlorides. Compared with pure MA, the presence of metal ions yielded CL with high carboxyl content (0.34 mmol/g), small size and good dispersibility. CL was then composited with CNF to prepare various CL/ cellulose nanofibrils (CNF) composite films. When the addition of ferric chloride was 0.3 mmol/g maleic acid, the corresponding composite films exhibited highest tensile strength (180.0 MPa), Young's modulus (13.0 GPa) and excellent ultraviolet blocking rate (97.0 %). Meanwhile, the interaction forces measured by atomic force microscope showed that the binding between CNF and various CLs (276-406 nN) was higher than that between pure CNFs (202 nN), verifying that CL enhanced the mechanical properties of composite films. In summary, this work constructs a super-strong network between CL and CNF synergistically mediated by metal ion crosslinking and hydrogen bonding, which can be a promising alternative to replace conventional plastics in multiple areas.