SiO_2气凝胶核/聚苯乙烯壳复合阻燃保温板实验研究  

SiO_2 Aerogel Core / Polystyrene Shell Composite Flame Retardant Insulation Board Preparation

作　　者：朱原[1] 刘斌[1] 高辉[1] 张磊[1] 

机构地区：[1]长安大学材料科学与工程学院,陕西西安710064

出　　处：《广州化工》2015年第1期78-80,104,共4页GuangZhou Chemical Industry

摘　　要：实验过程采用热压浸渍加入发泡剂方法制备发泡型Si O2气凝胶核/聚苯乙烯壳复合珠粒,当加入14份发泡剂珠粒在90℃、压力0.9 MPa条件下反应9 h制备得到发泡剂含量为7%左右的可发性复合珠粒。同时对其发泡成型的原理、工艺流程、影响因素及参数控制等进行了研究,实验结果表明,在蒸汽压力为0.4 MPa的条件下经40 s制备得到发泡倍率为20左右、密度为0.025 g/cm3的预发复合珠粒,再经过模塑蒸汽发泡,蒸汽压力0.35 MPa、通气时间180 s,最终制备出保温性能优异(导热系数可达0.026 W/(m·K))、力学性能良好的Si O2气凝胶核/聚苯乙烯壳复合保温板。In the process of experiment,expandable Si O2 aerogel core / polystyrene shell beads were prepared by adding foaming agent and being impregnated in hot- pressing. Under the conditions of adding 14 phr foaming agent at 90 ℃ and reaction for 9 h at a pressure of 0. 9 MPa,the prepared expandable composite beads foaming agent content were about 7 %. The process flow of foam molding was studied,including the influence factors and the parameters of control principle. The experimental results showed that the expandable beads＇ density was 0. 025 g /cm3 and the foaming ratio reached 20. After the pre- foaming experiment,the pre- foaming beads can be used to prepare the insulation board at the conditions of 0. 35 MPa steam pressure and 180 s processing time in the foaming box. The final insulation boards＇ thermal conductivity was down to 0. 026 W /（ m·K） and the boards had excellent mechanical properties too.

关 键 词：聚苯乙烯 SIO2气凝胶 核壳珠粒 发泡成型 热压浸渍 

分 类 号：TB332[一般工业技术—材料科学与工程]