可治愈的超合体纳米复合材料通过水传导的涂层
Siyu Li1, Leendert G J van der Ven1, Santiago J Garcia2
1Laboratory of Physical Chemistry, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, P.O. Box 513, Eindhoven 5600 MB, The Netherlands.
概括
研究人员使用聚合物-纳米粒子开发了自愈水性涂层. 这些先进的涂料通过控制的纳米填充剂分布和可逆的二硫化物键来修复损坏,表现出更好的弹性,强度和延长寿命.
科学领域:
- 材料科学 材料科学 材料科学
- 聚合物化学 聚合物化学
- 纳米技术 纳米技术
背景情况:
- 水性涂料通常包含纳米填充剂以增强性能,但填充剂聚合可能会损害性能.
- 控制纳米填充剂的分布和引入可逆键是提高涂层弹性,强度和自我愈合能力的关键.
研究的目的:
- 准备和描述具有增强机械性能和自我愈合能力的水性纳米复合材料涂层.
- 研究这些涂料中纳米填充剂度,粘性弹性和愈合效率之间的关系.
主要方法:
- 合成了聚合物核心/冠超状颗粒的水性分散物.
- 在涂层形成过程中引入了 thiol/disulfide 组以进行可逆交叉链接.
- 使用动态,静态和表面分析评估了机械性能和损坏恢复 (UV诱导).
主要成果:
- 超状纳米复合材料涂层显著恢复了表面的划痕和切割损伤.
- 愈合效率与涂层粘弹性和二硫化物桥梁的界面激活相关.
- 较低的二氧化度 (<临界体积分数) 导致更高的现场愈合效率.
结论:
- 控制的纳米填充剂分布和可逆的二硫化物键有效地提高了水性涂料的弹性,强度和自我愈合.
- 该研究提供了通过机械损坏恢复延长涂层寿命的策略.
- 优化度对于最大限度地提高现场愈合性能至关重要.
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