Mechanically Robust, Reprocessable, and Light-Controlled Healable Solvent-Free Lignin-Containing Polyurethane Elastomers Based on Dynamic Phenol-Carbamate NetworkClick to copy article linkArticle link copied!
- Jin PengJin PengSchool of Chemistry and Chemical Engineering, State Key Laboratory of Pulp and Paper Engineering, Guangdong Provincial Key Lab of Green Chemical Product Technology, South China University of Technology, Wushan Road 381, Guangzhou 510640, P. R. ChinaMore by Jin Peng
- Haixu WangHaixu WangSchool of Chemistry and Chemical Engineering, State Key Laboratory of Pulp and Paper Engineering, Guangdong Provincial Key Lab of Green Chemical Product Technology, South China University of Technology, Wushan Road 381, Guangzhou 510640, P. R. ChinaMore by Haixu Wang
- Shusheng Chen*Shusheng Chen*Email: [email protected]School of Advanced Manufacturing, Guangdong University of Technology, Jieyang 515200, P. R. ChinaGuangdong Provincial Laboratory of Chemistry and Fine Chemical Engineering Jieyang Center, Jieyang 515200, P. R. ChinaGuangdong Provincial Key Laboratory of Plant Resources Biorefinery, School of Chemical Engineering and Light Industry, Guangdong University of Technology, Waihuan Xi Road 100, Guangzhou, Guangdong 510006, P. R. ChinaMore by Shusheng Chen
- Weifeng Liu*Weifeng Liu*Email: [email protected]School of Chemistry and Chemical Engineering, State Key Laboratory of Pulp and Paper Engineering, Guangdong Provincial Key Lab of Green Chemical Product Technology, South China University of Technology, Wushan Road 381, Guangzhou 510640, P. R. ChinaGuangdong Provincial Laboratory of Chemistry and Fine Chemical Engineering Jieyang Center, Jieyang 515200, P. R. ChinaMore by Weifeng Liu
- Xueqing QiuXueqing QiuGuangdong Provincial Laboratory of Chemistry and Fine Chemical Engineering Jieyang Center, Jieyang 515200, P. R. ChinaGuangdong Provincial Key Laboratory of Plant Resources Biorefinery, School of Chemical Engineering and Light Industry, Guangdong University of Technology, Waihuan Xi Road 100, Guangzhou, Guangdong 510006, P. R. ChinaMore by Xueqing Qiu
Abstract
In this study, we introduce an innovative one-step, solvent-free approach for preparing lignin-containing polyurethane elastomers (LPUes) with nanomicro phase-separated structure and dynamic dual-cross-linking networks comprising both phenol-carbamate bonds (PCBs) and hydrogen bonds. This distinctive structural design imparted exceptional mechanical properties to the LPUes. The sample containing 22.9 wt % phenolized lignin exhibited tensile strength of 44.6 MPa, elongation at break of 714.6%, and toughness of 148.0 MJ/m3. The abundance of dynamic PCBs also conferred remarkable reprocessing capabilities, with these LPUes retaining over 98% for tensile strength and 94.4% for toughness after two hot-pressing cycles. Moreover, the incorporation of lignin endowed the LPUes with photothermal properties, facilitating efficient light-controlled self-healing and shape-memory functionalities. This work offers an innovative pathway to harmonize the mechanical properties and thermal adaptability in the development of sustainable and high-performance LPUes, thereby opening their avenues for diverse potential applications.
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