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摘要
采用发泡聚苯乙烯 (EPS)颗粒和煅烧高岭土制备了地聚物/EPS轻质保温复合材料,考察了环氧树脂改性前后高岭土基地聚物性能的变化,研究了EPS与高岭土质量比分别为0.5和0.65时,环氧树脂改性及掺杂大理石粉对地聚物/EPS复合材料表观密度、抗压强度、弯曲强度、导热系数、微观结构的影响。结果表明:环氧树脂改性和掺杂大理石粉有助于减少裂纹的产生,改善地聚物与EPS之间的粘结力,提高复合材料的抗压强度和弯曲强度,但会在一定程度上增大复合材料的导热系数。此外,随着EPS与高岭土质量比的增大,地聚物/EPS复合材料的表观密度、导热系数降低。EPS与高岭土质量比为0.65时,制备的地聚物/EPS复合材料表观密度、抗压强度、导热系数分别为507kg/m3、2.05MPa、0.067W/ (m·K),基本满足建筑保温材料的使用要求。
Abstract
The lightweight insulation geopolymer/expanded polystyrene (EPS) composites were fabricated by using EPS particles and metakaolin as raw materials.The effects of epoxy resin on the properties of metakaolin-based geopolymer were researched.Moreover,the influences of epoxy resin and marble fume on the apparent density,compressive strength,flexural strength,thermal conductivity and microstructure of geopolymer/EPS composites were also analyzed when the ratio of EPS and metakaolin was 0.5 and 0.65,respectively.The results showed that epoxy resin and marble fume can reduce the cracks and improved the compressive and flexural strength of composites.But to some extent,the thermal conductivity of composites will be increased.In addition,the apparent density and thermal conductivity of composites decreased with the increase of EPS dosage.The apparent density of geopolymer/EPS was 507kg/m3,compressive strength was 2.05MPa and the thermal conductivity as low as 0.067W/ (m·K) when the ratio of EPS and metakaolin was 0.65,which can meets the requirements of building insulation materials.
关键词
发泡聚苯乙烯
/
地聚物
/
环氧树脂
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导热系数
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微观性能
Key words
expanded polystyrene
/
geopolymer
/
epoxy resin
/
thermal conductivity
/
microstructure
地聚物/发泡聚苯乙烯复合材料的制备及性能研究[J].
化工新型材料, 2020, 48(2): 93-98 DOI:
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基金资助
内蒙古自治区自然科学基金资助项目(2014MS0528)
