Lignin-containing polyurethane elastomers with enhanced mechanical properties via hydrogen bond interactions

被引：80
作者：
Sun, Nan [1 ,2 ]
Di, Mingwei [1 ,2 ]
Liu, Yang [1 ,2 ]
机构：
[1] Northeast Forestry Univ, Coll Mat Sci & Engn, Harbin 150040, Peoples R China
[2] Northeast Forestry Univ, Key Lab Biobased Mat Sci & Technol, Minist Educ, Harbin 150040, Peoples R China
来源：
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES | 2021年 / 184卷
关键词：
Polyurethane elastomer; Lignin; Mechanical properties; Hydrogen bond; Self-healing;
D O I：
10.1016/j.ijbiomac.2021.06.038
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：
In this work, lignin-containing polyester polyol (LPES) was successfully synthesized by vacuum melting method with lignin instead of polyol, and then reacted with isocyanate and chain extender to obtain lignin-based polyurethane elastomer (LPUE). The effects of lignin as reactive raw material, chain extender, and filler on the structure, thermostability, mechanical performance, and self-healing properties of elastomers were systematically studied, respectively. The comprehensive mechanical properties of the obtained materials were significantly enhanced after the introduction of lignin, especially the maximum tensile strength increased to 26.6 MPa and elongation at break reached 408.6%, which were 1510.3% and 2130.5% higher than that of the original polyurethane elastomer (PUE). Results revealed that lignin in the hard segment had a significant effect on the thermal stability and mechanical properties of polyurethane elastomer, and lignin in the soft segment had an obvious impact on the healing properties. Due to the hydrogen bonding interaction of the polar groups in the molecular chain of lignin to form a microphase-ordered structure, LPUE with excellent mechanical properties can be obtained.
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页码：1 / 8
页数：8
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