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Facile preparation of phosphorus containing hyperbranched polysiloxane grafted graphene oxide hybrid toward simultaneously enhanced flame retardancy and smoke suppression of thermoplastic polyurethane nanocomposites
Composites Part A: Applied Science and Manufacturing ( IF 8.7 ) Pub Date : 2021-08-21 , DOI: 10.1016/j.compositesa.2021.106614
Wenjie Huang 1 , Jingshu Huang 2 , Bin Yu 3 , Yuan Meng 1 , Xianwu Cao 2 , Qunchao Zhang 1 , Wei Wu 2, 4 , Dean Shi 1 , Tao Jiang 1 , Robert K.Y. Li 4
Affiliation  

In this work, a novel type of phosphorus containing hyperbranched polysiloxane (P-HBPSi) was synthesized by sol–gel method, and then utilized to functionalize graphene oxide (P-HBPSi@GO). The P-HBPSi@GO hybrids were mixed with TPU by melt compounding. The SEM observation revealed that the P-HBPSi@GO dispersed homogeneously in the TPU matrix with good compatibility. The TPU/P-HBPSi@GO-2.0 maintained high ductility with elongation at break of 1750.8%. The peak heat release rate and total heat release of TPU/P-HBPSi@GO-2.0 were reduced by 63.5% and 20.9%, respectively. In addition, the peak smoke production rate and total smoke production of TPU nanocomposites were also reduced dramatically by 58.3% and 36.4%, respectively. The production of phosphorus free radical scavengers in the gas phase and the barrier effects of GO nanosheets, catalytic charring and the unique Si-O-Si framework of P-HBPSi flame retardant in the condensed phase contributed to the outstanding flame retardancy and toxic gas suppression of TPU/P-HBPSi@GO nanocomposites.



中文翻译:

含磷超支化聚硅氧烷接枝氧化石墨烯杂化物的简便制备同时增强热塑性聚氨酯纳米复合材料的阻燃性和抑烟性

在这项工作中,采用溶胶-凝胶法合成了一种新型含磷超支化聚硅氧烷(P-HBPSi),然后用于功能化氧化石墨烯(P-HBPSi@GO)。P-HBPSi@GO 杂化物通过熔融复合与 TPU 混合。SEM 观察表明 P-HBPSi@GO 均匀分散在 TPU 基体中,具有良好的相容性。TPU/P-HBPSi@GO-2.0 保持高延展性,断裂伸长率为 1750.8%。TPU/P-HBPSi@GO-2.0的峰值放热率和总放热率分别降低了63.5%和20.9%。此外,TPU纳米复合材料的峰值产烟率和总产烟量也分别大幅降低了58.3%和36.4%。气相中磷自由基清除剂的产生和GO纳米片的阻隔作用,

更新日期:2021-08-24
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