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

通信作者：Zhou, YH[1];Zhang, M[1]

机构：[1]Chinese Acad Forestry, Inst Chem Ind Forest Prod, Nanjing 210042, Peoples R China;[2]Chinese Acad Forestry, Inst Chem Ind Forest Prod, Natl Key Lab Dev & Utilizat Forest Food Resources, State Key Lab Dev & Utilizat Forest Food Resources, Nanjing 210042, Peoples R China;[3]Natl Forestry & Grassland Adm, Key Lab Biomass Energy & Mat, Key Lab Chem Engn Forest Prod, Nanjing 210042, Peoples R China

年份：2025

卷号：525

外文期刊名：CHEMICAL ENGINEERING JOURNAL

收录：;EI(收录号：20254519456462);Scopus(收录号：2-s2.0-105020776251);WOS:【SCI-EXPANDED(收录号:WOS:001616203600029)】；

基金：This work acknowledged the financial support of the National Nat-ural Science Foundation of China (Grant Nos. 32371825, 32271819) and the Central Non-profit Research Institution of CAF (Grant No. CAFYBB2023QB009) .

语种：英文

外文关键词：Semi-rigid polyurethane foam; Bio-based benzothiazine; Flame retardancy; Sustainable recycling

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 developed a bio-based semi-rigid polyurethane foam (SPUN-T) featuring a carefully designed bio-based benzoxazine structure as its functional unit, thereby achieving a 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.