Preparation and Study of Bio-based Modified P-N-Si Nanometer Co-efficent Flame Retardant Polyurethane Foam

CAI Jun, CHEN Xinyu, GU Xiaoyu, SUN Jun, LI Hongfei, ZHANG Sheng, FAN Ruilan

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Plastics Science and Technology ›› 2025, Vol. 53 ›› Issue (01) : 61-67. DOI: 10.15925/j.cnki.issn1005-3360.2025.01.011
Theory and Research

Preparation and Study of Bio-based Modified P-N-Si Nanometer Co-efficent Flame Retardant Polyurethane Foam

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Abstract

Rigid polyurethane foam (PU) is an organic polymer material with a large number of repeating structural unit carbamate groups (—NHCOO—) in the main chain, which is very easy to be ignited by fire. In order to improve its combustion performance, in this study, m-SiO2 was used as the silicon source, phytic acid (PA) was used as the acid source, 4-aminopyridine (4-AP) was used as the nitrogen source, the transition metal ion Zn2+ was selected as the catalytic carbon forming agent, and the biobased modified P-N-Si flame retardant m-SKAPA-Zn was prepared by a layer-by-layer modification. m-SKAPA-Zn was respectively added into the PU at the mass fraction of 5%, 10% and 15% to prepare flame retardant PU composites. The results showed that the flame retardant properties increased with the increase of m-SKAPA-Zn addition, the LOI of PU material with 15% m-SKAPA-Zn increased to 22.6%, the UL-94 test could reach the V-1 rating, and the smoke density level was reduced by 37.5%. m-SKAPA-Zn showed better flame retardancy and smoke inhibition effect.

Key words

Rigid polyurethane foam / Mesoporous nano-silica (m-SiO2) / Phytic acid (PA) / P-N-Si flame retardant

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CAI Jun , CHEN Xinyu , GU Xiaoyu , et al . Preparation and Study of Bio-based Modified P-N-Si Nanometer Co-efficent Flame Retardant Polyurethane Foam. Plastics Science and Technology. 2025, 53(01): 61-67 https://doi.org/10.15925/j.cnki.issn1005-3360.2025.01.011

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