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Highly-Flame-Retardant Performance and Sustainable Polyurethane Foams from Industrial Kraft Lignin via Exploiting Lignin Demethylation

Tianyuan XiaoThe Key Laboratory of High Value Utilization of Botanical Resources of China Light Industry, Liaoning Key Lab of Lignocellulose Chemistry and Biomaterials, Liaoning Collaborative Innovation Center for Lignocellulosic Biorefinery, College of Light Industry and Chemical EngineeringLu WuDalian Polytechnic UniversityQianwei XuDalian Polytechnic UniversityXuanjia YuDalian Polytechnic UniversityQiu FuQiqihar UniversityFengshan ZhangShanghai Huayi Group (China)Yong LiCollege of Light Industry and TextileGuangming YinCollege of Light Industry and TextileLingzhi HuangThe Key Laboratory of High Value Utilization of Botanical Resources of China Light Industry, Liaoning Key Lab of Lignocellulose Chemistry and Biomaterials, Liaoning Collaborative Innovation Center for Lignocellulosic Biorefinery, College of Light Industry and Chemical EngineeringPedram FatehiChemical Engineering Department, Lakehead University, 955 Oliver Road, Thunder Bay, Ontario P7B 5E1, CanadaHaiqiang ShiThe Key Laboratory of High Value Utilization of Botanical Resources of China Light Industry, Liaoning Key Lab of Lignocellulose Chemistry and Biomaterials, Liaoning Collaborative Innovation Center for Lignocellulosic Biorefinery, College of Light Industry and Chemical Engineering

Biomacromoleculesjournal2025en

Ochiq kirish: yoʻq

ABI

Annotatsiya

Achieving the enhancement of thermal stability in polyurethane (PU) foams and promoting their green and harmless development have long been both hotspots and challenges in this field. Here, the molecular integration of demethylated lignin and 2NH2DOPO was achieved through the Mannich reaction, which were successfully incorporated into the macromolecular network of polyurethane foam. The unique molecular structure and functional groups synergistically enhance both its condensed-phase and gas-phase flame-retardant performances, which endows the PU foam with an astonishing limiting oxygen index (LOI) value as high as 34.5% and enables it to meet the combustion standard of UL-94 V-0. In addition, the incorporation of lignin enhances the rigidity of the polymer network structure and establishes a chemically reversible dynamic network, thereby endowing the foam composites with improved compressive strength. This work provides an innovative approach for coordinating the development of sustainable and flame-retardant PU foams and paves the way for the high-value utilization of lignin.

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Mavzular

Lignin and Wood Chemistry Flame retardant materials and properties Polymer composites and self-healing

Identifikatorlar

DOI: 10.1021/acs.biomac.5c00437

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