聚氨和KH550/SiO2在增强环氧树脂 (EP) 机械性能方面的分子动力学研究
Zhonghe Tong1, Rui Qiu1, Shaoxu Cai2
1School of Electrical and Electronic Engineering, Chongqing University of Technology, Chongqing 400054, China.
Langmuir : the ACS journal of surfaces and colloids
|July 3, 2025
概括
这项研究使用聚氨 (PU) 和KH550/SiO2纳米粒子增强环氧树脂 (EP) 的机械性能. 而KH550-SiO2/PU/EP复合材料在模量和强度方面显著改善.
科学领域:
- 材料科学 材料科学 材料科学
- 聚合物科学 聚合物科学
- 纳米技术纳米技术
背景情况:
- 环氧树脂 (EP) 是一种广泛使用的热固聚合物.
- 提高EP的机械性能对于先进的应用至关重要.
- 协同修改提供了一条有希望的途径来提高复合材料的性能.
研究的目的:
- 研究聚氨 (PU) 和KH550/SiO2纳米颗粒对环氧树脂 (EP) 机械性能的协同修饰效应.
- 阐明这种协同修饰的潜在机制.
- 开发一个优化的环氧树脂复合材料模型,以提高性能.
主要方法:
- 五个复合系统的计算建模:EP,PU-EP,SiO2-SR,KH550/SiO2-EP,以及KH550/SiO2-PU-EP.
- 对凝聚力的能量密度,自由分量的体积,旋转半径,辐射分布函数和键的分析.
- 拉出模拟来评估界面相互作用.
- 在300K至450K的温度下对机械性能进行评估.
主要成果:
- KH550合剂增强了SiO2纳米粒子与EP矩阵之间的相互作用能量.
- 和KH550/SiO2填充剂都减少了自由分量,并增加了EP复合材料中的键.
- 在机械性能方面,KH550-SiO2 / PU / EP系统表现出最显著的改进.
- 在300 K时,扬模量,剪模量,散量模量和B/G比分分别增加了8.12%,7.03%,16.05%和8.43%.
- 在450K时,这些特性分别增加了18.26%,17.30%,23.87%和27.57%.
结论:
- 使用KH550/SiO2和PU的协同修改有效地提高了环氧树脂复合材料的机械性能.
- 增强的特性归因于改善的界面相互作用和改变的自由体积和键特性.
- 这项研究为设计高性能环氧树脂复合材料提供了宝贵的见解.
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