以工业废料回收处理后的粉煤灰空心球微珠为原材料,以脲醛树脂、酚醛树脂、环氧树脂E-51、特种树脂为基体,制备了多孔空心球结构吸声材料,并对其显微组织、吸声性能和压缩性能进行研究。结果表明:酚醛树脂基体复合材料和环氧树脂基体复合材料分别在180℃/2h和170℃/2h时实现了较好的复合。两种复合材料的吸声性能从趋势上与Delany-Bazley经验吸声模型吻合较好,且环氧树脂基体复合材料在低频和高频阶段的吸声性能优于酚醛树脂基复合材料。同时环氧树脂基体复合材料的压缩强度(约8MPa)显著高于酚醛树脂基体复合材料(约3.5MPa)。断口分析表明粉煤灰空心球与环氧树脂基体的界面结合强度要高于其与酚醛树脂基体的结合强度。
Recycled fly ash from industrial waste and the thermoplastic resins (urea formaldehyde resin,phenolic resin,epoxy resin E-51,special resin) were used as the reinforcement and matrix to prepare the porous materials with hollow sphere structure (HSS),respectively,and their microstructure,sound absorption and compressive properties were investigated.It was found that the phenolic resin matrix and epoxy resin matrix composites were well fabricated at 180℃/2h and 170℃/2h,respectively.Moreover,the trends of the sound absorption properties of the phenolic resin matrix and epoxy resin matrix composites agreed well with the Delany-Bazley empirical model.Meanwhile,the epoxy resin matrix composites demonstrated better sound absorption properties than that of the phenolic resin matrix composites both in low and high frequencies.Furthermore,the epoxy resin matrix composites showed higher compressive strength (8MPa) than that of the phenolic resin matrix composites (3.5MPa).The fracture surface observation indicated that the interfacial bonding strength of fly ashes-epoxy resin was higher than that of fly ashes-phenolic resin interface.
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基金资助
国家自然科学基金(51501047和51871073);中国博士后基金(2016M590280和2017T100240);黑龙江省博士后基金(LBH-Z16075);中央高校基本科研业务费专项(HIT.NSRIF.20161和HIT.MKSTISP.201615)
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