Construction and mechanism study of lignin-based polyurethane with high strength and high self-healing properties

被引：43

作者：

Du, Jiahao ^{[1
]}

Wang, Huan ^{[2
]}

Huang, Zhiyi ^{[1
]}

Liu, Xiaochun ^{[1
]}

Yin, Xinshan ^{[1
]}

Wu, Jianxin ^{[1
]}

Lin, Wenjing ^{[1
]}

Lin, Xiaofeng ^{[1
]}

Yi, Guobin ^{[1
]}

机构：

[1] Guangdong Univ Technol, Jieyang Ctr, Sch Chem Engn & Light Ind, Guangdong Lab Chem & Fine Chem Ind, Guangzhou 510006, Peoples R China

[2] Guangzhou Univ, Sch Chem & Chem Engn, Guangzhou Key Lab Sensing Mat & Devices, Guangzhou 510006, Peoples R China

来源：

INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES | 2023年 / 248卷

基金：

中国国家自然科学基金;

关键词：

Self-healing; Polyurethane; Lignin; NON-ISOCYANATE POLYURETHANES; HIGH-PERFORMANCE; ELASTOMERS; HYDROGELS; BONDS;

D O I：

10.1016/j.ijbiomac.2023.125925

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

Lignin is a natural polymer with abundant functional groups with great application prospects in lignin-based polyurethane elastomers with self-healing abilities. In this study, a lignin self-healing polyurethane (PUDA-L) was specially designed using lignin as the raw material of polyurethane, combining lignin with Diels-Alder (DA) bond and hydrogen bonds. The experimental results showed that PUDA-L was prepared with good thermal stability, fatigue resistance, shape memory effect, excellent mechanical strength, and self-healing ability by partially replacing the crosslinking agents with bio-based lignin and hydroxylated modified lignin to increase the hydroxyl content. Polyurethane has a tensile strength of up to 29 MPa and an elongation at break of up to 500 %. The excellent self-healing ability of PUDA-L originates from the internal DA bonds and cross-linked hydrogen bonds. After the dumbbell sample was fused and heated at 130 degrees C for 4 h, the elastomer could be completely healed, the tensile strength was restored to 29 MPa, and the self-healing efficiency was up to 100 %. The developed PUDA-L elastomer has promising applications in sensors and smart skins.

引用

页数：14

共 58 条

[1] Polyacrylic Acid Nanoplatforms: Antimicrobial, Tissue Engineering, and Cancer Theranostic Applications [J].