聚合物结合爆炸物的界面增强通过移植具有增强机械性能的中性结合剂
Chengcheng Zeng1, Gang Li1, Congmei Lin1
1Institute of Chemical Materials, China Academy of Engineering Physics, Mianyang 621900, China.
ACS omega
|March 17, 2025
概括
使用聚多巴胺 (PDA) 和中性结合剂 (NBA) 的能量晶体表面修饰显著提高了复合材料的性能. 这种仿生方法提高了先进的能量材料的机械性能和抗变形能力.
科学领域:
- 材料科学 材料科学 材料科学
- 化学工程是化学工程的重要组成部分.
- 能量材料 能量材料
背景情况:
- 能量晶体中较差的结合限制了爆炸性复合材料的性能.
- 表面修改是改善复合材料中的界面相互作用的关键策略.
研究的目的:
- 开发一种使用仿生涂层和界面添加剂的能量晶体的多用途功能化方法.
- 提高爆炸性复合材料的机械性能和抗变形能力.
主要方法:
- 1,3,5-triamino-2,4,6-trinitrobenzene (TATB) 晶体的表面修饰通过多巴胺 (DA) 的自我聚合形成多巴胺 (PDA) .
- 将中性结合剂 (NBA) 植入PDA涂层的TATB晶体上,从而创建新的氨基键.
- 评估机械性能,包括抗变形,存储模块和巴西机械测试性能.
主要成果:
- 通过生成氨基键和改变晶体粗度,成功的"移植到"战略得到证实.
- 显著提高了对变形的抵抗力 (在75°C或9MPa时应变率<0.06%).
- 提高了PBX-3的机械性能,增强了强度 (19.4%),延长 (24.4%) 和断裂工作 (51.6%).
- 在广泛的温度范围内 (20-120°C) 保持高存储模量 (>4000 MPa).
结论:
- 来自PDA涂层和NBA接种的结合和物理固的双重效应增强了复合材料的机械性.
- 这种生物仿真表面改造方法为提高一般复合材料的机械性能提供了一个有希望的策略.
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