Improving the Flame Retardancy and Smoke Suppression Properties of Polyurethane Foams with SiO2 Microcapsule and its Flame-Retardant Mechanism

Hong Liu, Bin Zhang, Jian Han
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引用次数: 14

Abstract

ABSTRACT An efficient silicon dioxide (SiO2) microcapsule was synthesized and used for flame-retardant polyurethane foams. The polyurethane/25 wt% SiO2 microcapsule composites achieved a limiting oxygen index value of 34.8% and UL-94 V-0 rating, and SDR was significantly reduced. TG, Py-gas chromatography–mass spectrometry, energy dispersive X-ray, and Fourier Transform infrared spectroscopy (FTIP) results indicated that SiO2 microcapsule could serve as an outstanding flame retardant that operates by both chemical (condensation) and physical (cooling and blocking) mechanisms. The compact and stable char layer formed at the inner layer of the residue during thermal decomposition, and this situation results in the excellent flame retardancy of polyurethane. GRAPHICAL ABSTRACT
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SiO2微胶囊提高聚氨酯泡沫的阻燃抑烟性能及其阻燃机理
合成了一种高效二氧化硅(SiO2)微胶囊,并将其用于阻燃聚氨酯泡沫材料。聚氨酯/25 wt% SiO2微胶囊复合材料的极限氧指数为34.8%,UL-94 V-0额定值,SDR显著降低。TG、py -气相色谱-质谱、能量色散x射线和傅里叶变换红外光谱(FTIP)结果表明,SiO2微胶囊可以作为一种具有化学(冷凝)和物理(冷却和阻塞)机制的优秀阻燃剂。在热分解过程中,残渣的内层形成致密而稳定的炭层,这种情况导致聚氨酯具有优异的阻燃性。图形抽象
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来源期刊
Polymer-Plastics Technology and Engineering
Polymer-Plastics Technology and Engineering 工程技术-高分子科学
CiteScore
1.71
自引率
0.00%
发文量
0
审稿时长
4 months
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