针对酚醛泡沫材料易掉渣、强度低、隔音与保温性差等问题,以花生壳液化树脂为基体,通过聚乙二醇(PEG-400)、硅藻土和相变微胶囊协同改性,制备了花生壳苯酚液化物-甲醛树脂泡沫,分析了改性前后泡沫材料的泡孔结构和性能。结果表明:改性后泡沫材料泡孔平均直径减小至174.51μm,形态规整且分布均匀;表观密度最高达148.99kg/m3,压缩强度提升至0.1846MPa,粉化率最低达6.65%;导热系数降至0.0604W/(m·K),并出现相变吸放热峰,兼具隔热与调温功能;热释放速率峰值最低达24.4kW/m2,总热释放量、烟释放速率峰值、总烟释放量均呈现试样B<试样D<试样A<试样C的趋势;最大吸声系数提高至0.9354,最大隔声量达到62.83dB。
To address the issues of easy chipping,low strength,poor sound insulation and thermal insulation of phenolic foam materials,peanut shell liquefied resin was used as the matrix,and the phenolic foam of peanut shell liquefied product-formaldehyde resin was prepared through the synergistic modification of polyethylene glycol (PEG-400),diatomite and phase change microcapsules.The pore structure and properties of the foam materials before and after modification were analyzed.The results showed that the average pore diameter of the modified foam material was reduced to 174.51μm with a regular shape and uniform distribution.The maximum apparent density was up to 148.99kg/m3,the compressive strength was increased to 0.1846MPa,and the powdering rate was as low as 6.65%.The thermal conductivity was reduced to 0.0604W/(m·K),and phase change heat absorption and release peaks appeared,with both heat insulation and temperature regulation functions.The peak value of heat release rate was as low as 24.4kW/m2,and the total heat release,peak value of smoke release rate and total smoke release showed a trend of sample B<sample D<sample A<sample C.The maximum sound absorption coefficient was increased to 0.9354,and the maximum sound insulation was up to 62.83dB.
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基金资助
江苏省林业科技创新与推广项目(LYKJ[2023]11)
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