文献类型：期刊文献

英文题名：High-performance flame-retardant polyurethane foam driven by bio-based benzoxazine functional units: a full-link exploration from material design to chemical recycling

作者：Zhang, Tianchen[1,2] Pan, Zheng[1] Tian, Linfeng[1] Zhao, Baozheng[1] Song, Fei[1] Zhou, Yonghong[1,3] Zhang, Meng[1,2]

第一作者：Zhang, Tianchen

机构：[1] Institute of Chemical Industry of Forest Products, Chinese Academy of Forestry, Nanjing, 210042, China; [2] National Key Laboratory for Development and Utilization of Forest Food Resources, China; [3] National Engineering Research Center of Low-Carbon Processing and Utilization of Forest Biomass, Jiangsu, Nanjing, 210042, China

年份：2025

外文期刊名：SSRN

收录：EI(收录号：20254519456462);Scopus(收录号：2-s2.0-105020776251)

语种：英文

外文关键词：Adhesives - Flame retardants - Impact strength - Life cycle - Recycling - Rigid foamed plastics - Shear strength

摘要：Semi-rigid polyurethane foam, with its high resistance to deformation and strength, is of great importance in impact-resistant applications. However, conventional designs often struggle to achieve a comprehensive balance of strength, flame retardancy, and sustainability. To address this, we have constructed a bio-based semi-rigid polyurethane foam (SPUN-T) with a carefully designed and synthesized bio-based benzoxazine structure as a functional unit, achieving this comprehensive combination of properties. By incorporating rigid benzoxazine rings, the foam achieves a compressive strength of 1.01 MPa at a strain of 10%, significantly exceeding that of polyurethane foams reported in the literature. Furthermore, a thermally triggered ring-opening polymerization flame-retardant system based on benzoxazine and a phosphorus-based flame retardant significantly enhances the material's char-forming abilities (char yield of 31.43%) and flame retardancy (total heat release of 82.2 MJ/m2). This flame-retardant mechanism remains stable during operation and is activated upon exposure to flame, resulting in highly effective flame retardancy. Surprisingly, the foam can be chemically recycled to yield a broadly applicable, high-strength adhesive with a shear strength exceeding 6 MPa. When combined with boron nitride for heat dissipation, it exhibits superior heat dissipation efficiency compared to commercially available materials. This work paves the way for creating the next generation of high-performance functional polyurethane foams, promoting the continued extension of the lifecycle of polyurethane materials and expanding their applications. ? 2025, The Authors. All rights reserved.