通过物理化学相互作用和分子结构的协同修饰来优化青材料性能的机制研究
1School of Civil Engineering and Transportation, Northeast Forestry University, Harbin 150040, China.
Polymers
|October 26, 2024
概括
带有芳香环的聚纤维通过与青分子交互和相互作用,比草纤维更多地提高了青性能. 这使得纤维修饰青具有优越的质性质,并提高了低温性能.
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.
- 土木工程 土木工程是指土木工程.
背景情况:
- 青的纤维修饰对于提高路面性能至关重要.
- 了解纤维和青之间的分子相互作用是优化纤维选择的关键.
- 不同的纤维化学结构导致不同的相互作用和性能结果.
研究的目的:
- 研究纤维分子结构和与青的物理化学相互作用之间的关系.
- 为了比较草纤维和聚纤维在改性青中的性能.
- 为选择纤维用于纤维修饰青提供理论基础.
主要方法:
- 模拟分子动力学以探索纤维-青分子相互作用.
- 减弱的总反射红外光谱测量,以评估青成分吸附.
- 动态剪切风湿学和低温爬行测试,以评估风湿学特性.
主要成果:
- 聚纤维通过范德瓦尔斯力与青相互作用,并在青分子中相互分散,而草纤维通过键吸附到表面.
- 聚纤维显示出高于青成分的吸附性和更高的复杂剪切模量.
- 与草纤维改性青相比,聚纤维改性青在低温下表现出明显较低的爬行模量.
结论:
- 具有芳香环结构的纤维,如聚,在改善青特性方面优于基于素的纤维 (如草).
- 纤维的分子结构决定了它们与青的相互作用,影响了改性青的整体性能.
- 这项研究为选择合适的纤维提供了基础的见解,以提高青粘合剂的性能.
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