标题: Super-strong hydrogel reinforced by an interconnected hollow microfiber network via regulating the water-cellulose-copolymer interplay

作者: Zhou, YF (Zhou, Yifang); Chen, JQ (Chen, Junqing); Lu, ZY (Lu, Ziyang); Qi, LH (Qi, Luhe); Zhou, J (Zhou, Jie); Xu, C (Xu, Chao); Chen, L (Chen, Lu); Huang, J (Huang, Jing); Wang, SJ (Wang, Sijun); Wang, ZQ (Wang, Zhiqiang); Ghani, A (Ghani, Awais); Tan, G (Tan, Gang); Lu, C (Lu, Cai); Liu, Z (Liu, Ze); Pang, ZQ (Pang, Zhenqian); Deng, HB (Deng, Hongbing); Chen, CJ (Chen, Chaoji)

来源出版物: SCIENCE BULLETIN 卷: 70 期: 6 页: 923-933 DOI: 10.1016/j.scib.2025.01.013 Published Date: 2025 MAR 30

摘要: The discontinuous fiber reinforced hydrogels are easy to fail due to the fracture of the fiber matrix during load-bearing. Here, we propose a novel strategy based on the synergistic reinforcement of interconnected natural fiber networks at multiple scales to fabricate hydrogels with extraordinary mechanical properties. Specifically, the P(AA-AM)/Cel (P(AA-AM), poly(acrylic acid-acrylamide); Cel, cellulose) hydrogel is synthesized by copolymerizing AA and AM on a substrate of paper with an interconnected hollow cellulose microfiber network. This innovative design achieves a collaborative improvement of mechanical properties, including a 253-times increase in strength (27.8 vs. 0.11 MPa), 137-times increase in work of fracture (3.59 vs. 0.026 MJ m 3), and 235-times increase in fracture energy (16.48 vs. 0.07 kJ m 2). These outstanding mechanical properties benefit from the P(AA-AM) network formed by the copolymerization, which fills both the inside and outside of the hollow cellulose fibers, thus establishing abundant strong hydrogen bonds with the fibers and welding the fiber junctions. Consequently, the hydrogel exhibits enhanced resistance to the slippage and fracture of fibers. This strategy demonstrates the mechanical strengthening effectiveness of a variety of hydrogels by regulating the water-cellulose-copolymer interplay, representing a practical and universal route for designing super-strong hydrogels. (c) 2025 Science China Press. Published by Elsevier B.V. and Science China Press. All rights are reserved, including those for text and data mining, AI training, and similar technologies.

作者关键词: Hydrogel; Cellulose; Fiber reinforcement; Hydrogen bond; Anti-freezing

KeyWords Plus: STRENGTH; TOUGH

地址: [Zhou, Yifang; Chen, Junqing; Lu, Ziyang; Qi, Luhe; Zhou, Jie; Xu, Chao; Chen, Lu; Huang, Jing; Wang, Sijun; Wang, Zhiqiang; Deng, Hongbing; Chen, Chaoji] Wuhan Univ, Sch Resource & Environm Sci, Hubei Prov Engn Res Ctr Emerging Funct Coating Mat, Hubei Biomass Resource Chem & Environm Biotechnol, Wuhan 430079, Peoples R China.

[Ghani, Awais; Tan, Gang; Pang, Zhenqian] Zhejiang Univ, Coll Civil Engn & Architecture, Dept Architecture, Hangzhou 310027, Peoples R China.

[Ghani, Awais; Tan, Gang; Pang, Zhenqian] Zhejiang Univ, Innovat Ctr Yangtze River Delta, Smart Mat Architecture Res Lab, Jiaxing 314100, Peoples R China.

[Tan, Gang; Lu, Cai; Liu, Ze] Wuhan Univ, Sch Civil Engn, Dept Engn Mech, Wuhan 430072, Peoples R China.

通讯作者地址: Deng, HB; Chen, CJ (通讯作者)，Wuhan Univ, Sch Resource & Environm Sci, Hubei Prov Engn Res Ctr Emerging Funct Coating Mat, Hubei Biomass Resource Chem & Environm Biotechnol, Wuhan 430079, Peoples R China.

Pang, ZQ (通讯作者)，Zhejiang Univ, Coll Civil Engn & Architecture, Dept Architecture, Hangzhou 310027, Peoples R China.

Pang, ZQ (通讯作者)，Zhejiang Univ, Innovat Ctr Yangtze River Delta, Smart Mat Architecture Res Lab, Jiaxing 314100, Peoples R China.

电子邮件地址: zqpang@zju.edu.cn; hbdeng@whu.edu.cn; chenchaojili@whu.edu.cn

影响因子：18.8