Preparation and Properties of Polystyrene-Grafted Al<sub>2</sub>O<sub>3</sub>/Epoxy Nanocomposites

doi:10.7652/xjtuxb202112018

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Preparation and Properties of Polystyrene-Grafted Al₂O₃/Epoxy Nanocomposites

更新时间：2025-07-09

- Preparation and Properties of Polystyrene-Grafted Al₂O₃/Epoxy Nanocomposites
- Vol. 55, Issue 12, Pages: 155-162(2021)
- 作者机构：
  
  西安交通大学电气工程学院,西安,710049
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb202112018
  CLC： TM215.1
- Online First：10 December 2021，
  
  Published：2021
- 稿件说明：
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Preparation and Properties of Polystyrene-Grafted Al₂O₃/Epoxy Nanocomposites[J]. 2021, 55(12): 155-162. DOI: 10.7652/xjtuxb202112018.
DOI：

Preparation and Properties of Polystyrene-Grafted Al₂O₃/Epoxy Nanocomposites[J]. 2021, 55(12): 155-162. DOI: 10.7652/xjtuxb202112018. DOI：

摘要

为了改善传统电工环氧树脂复合材料的综合电气、热学性能

通过对纳米Al

表面接枝改性提高其在环氧树脂基体中的分散性和界面强度

进而提高其对纳米环氧树脂复合物电气和热学性能的影响。以双酚A型环氧树脂为基体

通过将纳米Al

粒子包覆硅烷偶联剂和长链苯乙烯(PS)进行接枝改性

利用机械分散法制备了不同质量分数的纳米Al

环氧树脂复合材料

研究了不同含量的苯乙烯接枝改性纳米Al

对环氧树脂复合材料热稳定性、玻璃化转变温度、击穿场强及介电特性的影响。结果表明:接枝改性后的纳米Al

粒子在环氧树脂基体中分散均匀; 随着掺杂量的增加

接枝改性纳米Al

环氧树脂复合材料的击穿场强与介电常数均有升高

相对于纯环氧树脂

质量分数3%的苯乙烯接枝改性纳米Al

环氧树脂复合材料的击穿场强提高了5.67%

质量分数5%的苯乙烯接枝改性纳米Al

环氧树脂复合材料的介电常数提高了8.59%。分析认为:利用苯乙烯对纳米Al

表面进行接枝改性

可极大改善纳米粒子与聚合物基体的相容性

增强分散性

进而提高击穿强度

为电气领域环氧树脂纳米复合材料的研制和推广提供了依据。

Abstract

In order to improve the comprehensive electrical and thermal properties of traditional electrical epoxy composites

surface graft modification of nano-Al

is applied to achieve better dispersion and interface strength in epoxy matrix

so as to improve its influence on the electrical and thermal properties of epoxy nano-composites. Bisphenol-A epoxy resin is taken as the matrix mater

ial

and the nano-Al

particles coated with silane coupling agent and long-chain polystyrene(PS)are grafted and modified. The epoxy nano-composites with different mass fractions of surface-modified nano-Al

are prepared by mechanical dispersion method. The effects of different contents of PS-grafted nano-Al

on thermal stability

glass transition temperature

breakdown field strength and dielectric properties of the epoxy composites are studied. The results show that the grafted and modified nano-Al

particles disperse evenly in the epoxy matrix. With the increase of doping amount

both the breakdown strength and electric constant of the grafted and modified nano-Al

epoxy composite increase. Compared with neat epoxy

the grafted and modified nano-Al

/epoxy composite with 3% mass fraction shows the highest dielectric breakdown strength and the strength increases by about 5.67%. The dielectric constant of the nano-Al

/epoxy composite grafted with 5% styrene increases by 8.59%. It is concluded that grafting styrene to the surface of nano-Al

can greatly improve the compatibility between the nano-particles and the polymer matrix

enhance the dispersibility and further improve the breakdown strength

which may provide a basis for the development and promotion of epoxy nanocomposites in the electrical field.

关键词

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⁰

Preparation and Properties of Polystyrene-Grafted Al2O3/Epoxy Nanocomposites

DOI：10.7652/xjtuxb202112018

摘要

Abstract

关键词

Keywords

references

Preparation and Properties of Polystyrene-Grafted Al₂O₃/Epoxy Nanocomposites