针对以双酚A型环氧树脂为主的传统环氧树脂(EP)的介电性能较差等问题,将八苯胺丙基笼状聚倍半硅氧烷(An-POSS)纳米粒子引入,制备了一系列不同含量的EP/An-POSS低介电常数透明复合材料。系统地研究了EP/An-POSS复合体系的热性能、介电性能和力学性能。通过相关表征,探究An-POSS固化剂添加量对环氧树脂基介电等性能的影响。结果表明:EP/An-POSS复合材料的介电常数随着An-POSS添加量的增加呈现先减小后增加的趋势,力学性能呈现先增强后减弱的趋势。当An-POSS添加量为20%时,EP/An-POSS复合材料介电性能和力学性能达到最佳,在2×106Hz下介电常数达到了2.72(纯EP:3.41),介电损耗达到0.0196;其拉伸强度为62.02MPa,冲击强度为27.91kJ/m2,弯曲强度为142.5MPa,相比纯环氧树脂有较好的提升。
In response to the poor dielectric properties of traditional epoxy resin (EP),which is mainly composed of bisphenol A type epoxy resin,a series of low dielectric constant transparent composite materials with different contents of EP/An-POSS were prepared by introducing octaphenylpropyl cage like polysiloxane (An-POSS) nanoparticles.A thorough investigation was conducted on the mechanical,dielectric,and thermal characteristics of the EP/An-POS composite system.Using pertinent characterization,the impact of An-POSS curing agent content on the dielectric characteristics of epoxy resin-based materials was investigated.According to the findings,the mechanical characteristics of the EP/An-POSS composites exhibited a tendency of first strengthening and then weakening,and the dielectric constant showed a trend of first dropping and then increasing with the increase of An-POSS addition.When the amount of An-POSS added was 20wt%,the dielectric and mechanical properties of the EP/An-POSS composites reached the best: the dielectric constant was 2.72 (pure EP,3.41) at 2×106Hz,and the tensile strength,impact strength and bending strength were 62.02MPa,27.91kJ/m2,and 142.5MPa,respectively,representing significant improvement compared to pure epoxy resin.
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基金资助
国家自然科学基金(52273254和51673154);中央高校基本科研业务费专项资金资助(235201001)
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