Biobased Phosphorus Siloxane-Containing Polyurethane Foam with Flame-Retardant and Smoke-Suppressant Performances

编号 020030305

推送时间 20210809

研究领域 林产化工 

年份 2021 

类型 期刊 

语种 英语

标题 Biobased Phosphorus Siloxane-Containing Polyurethane Foam with Flame-Retardant and Smoke-Suppressant Performances

来源期刊 ACS SUSTAINABLE CHEMISTRY & ENGINEERING

期 第303期

发表时间 20210615

关键词 Fire-resistant materials;  Smoke suppression;  DOPO;  Rosin;  Biomass; 

摘要 Rigid polyurethane foam (RPUF) is one of the most widely used construction materials, but it is flammable and releases toxic smoke during combustion. In this study, a novel, synergistic-effect flame retardant (FPASO-DOPO) was synthesized by the Atherton-Todd reaction of 9,10-dihydro-9-oxa-10-phosphaphenan- threne-10-oxide (DOPO) with fumaropimaric acid-based siloxane (FPASO). The obtained FPASO-DOPO was then introduced into the cross-linking network of an RPUF by chemical bonding. The flame retardancy was enhanced by the synergistic effect of phosphorus and silicon in the FPASO-DOPO, which captured the free radical in the gaseous phase and formed a compact silica-rich char layer in the condensed phase. More importantly, the incorporation of FPASO-DOPO not only increased the limiting oxygen index from 17.0% to 26.1% but also reduced the total smoke release by 17.5%. A cone-calorimeter test indicated that the peak heat-release rate of the modified foam was reduced by 33.7% compared with that of neat RPUF. Calculations determined that the flame retardancy index (FRI) value was 7.88 for a modified foam, which shows a "good" flame retardancy. Moreover, the modified foams exhibited improvements in both compressive and flexural strength owing to the introduction of the rosin. This study has important implications for the development of modified polymers with good flame and smoke suppression from renewable resources.

服务人员 尚玮姣

服务院士 宋湛谦

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