矿物填充剂和烯酸复合聚氨结合剂之间的界面粘合机制:来自宏观实验和分子动力学模拟的见解
Shaochan Duan1, Heyu Du1, Jingxian Cui2
1School of Transportation, Southeast University, Nanjing 211189, China.
Langmuir : the ACS journal of surfaces and colloids
|January 24, 2026
概括
这项研究揭示了矿物填充剂如何与烯酸复合聚氨结合剂 (APUB) 结合,以实现环保的桥梁铺路. 水泥表现出最佳的粘合,填充剂的化学成分会影响在湿和干燥条件下的性能.
科学领域:
- 材料科学 材料科学 材料科学
- 土木工程 土木工程是指土木工程.
- 聚合物化学 聚合物化学
背景情况:
- 由于环境温度固化和高性,烯酸复合聚氨粘合剂 (APUB) 显示出对环保钢桥甲板铺路的承诺.
- 了解矿物填充剂和APUB之间的接口粘合机制对于优化复合砂性能至关重要.
- 目前的知识差距阻碍了高性能矿物填料/APUB复合材料的合理设计.
研究的目的:
- 系统地研究APUB和三个矿物填充剂 (水泥,石灰粉,飞灰) 之间的界面粘合机制.
- 阐明填充剂组成如何通过分子相互作用影响宏观性质.
- 为钢桥甲板选择填料和设计耐用复合砂提供理论基础.
主要方法:
- 宏观实验技术的整合:动态剪切形学和纳米印试验.
- 利用分子动力学 (MD) 模拟来分析界面绑定能量和相互作用.
- 在APUB中对水泥,石灰粉和飞灰的界面特性进行比较分析.
主要成果:
- 水泥-APUB接口表现出优异的粘合,这是最高静态弹性模量 (0.42 GPa) 和硬度 (20.19 MPa) 所表明的.
- MD模拟显示了结合能量的顺序:SiO2 > CaO > MgO > Fe2O3 > Al2O3.
- 接口机制从静电/范德瓦尔斯 (干燥) 转变为键 (湿),水在APUB-SiO2和APUB-CaO接口上产生桥梁效应.
结论:
- 矿物填料的化学成分决定了APUB复合砂的宏观性能.
- 水分子起着双重作用,根据填充剂的氧化物类型导致分离或增强粘合.
- 这些发现为开发资源效率高,高性能复合砂提供了基础,用于像钢桥甲板铺路这样的苛刻应用.
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