墙体用聚苯乙烯/纳米泡沫复合材料的制备与阻燃保温性能研究OA

A polystyrene/nano foam composite with multi-scale synergistic structure was prepared in the experiment.Composite particles were prepared by seed emulsion polymerization of styrene with silane-coupling-agent-modified nano-silica.Using these particles as the matrix,polystyrene/nano foam composites were then prepared by introducing organosilicon-activated expanded perlite and titanate-modified hollow glass microspheres.The results show that the single doped polystyrene/nano foam composites rock with only 12%volume fraction of expanded perlite forms a dense thermal barrier during combustion,which increases the limited oxygen index to 26.9%and reduces the combustion heat to 5.5 MJ/kg.The single doped polystyrene/nano foam composite with only 16%volume fraction of hollow glass microspheres increased the limited oxygen index to 28.2%and reduced the thermal conductivity to 0.129 W/(m·K)by virtue of its hollow structure and"micro ball"effect.Multi scale composite design significantly enhances the flame retardancy,thermal insulation,and mechanical properties of materials,endowing them with excellent thermal stability and durability.Therefore,the polystyrene/nano foam composites prepared in the experiment is a green and safe thermal insulation wall material with outstanding comprehensive performance,which has broad prospects in the integrated application of building energy conservation and fire protection.