纳米粘土/SBS复合物改性青的风病学和衰老特性
Yeqing Lu1, Siwei Li2, Yixin Jiang3
1Guangxi Jiaotou Technology Co., Ltd., Nanning 530000, China.
Materials (Basel, Switzerland)
|September 14, 2024
概括
纳米有机蒙莫里隆石 (OMMT) 添加到SBS修改的青减少了烟雾的产生,并提高了高温性能. 虽然OMMT稍微降低了低温灵活性,但却显著提高了青的耐老化性能.
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.
- 纳米技术纳米技术
背景情况:
- 青混合物在生产和施工过程中产生有害的烟雾.
- 提高青路面性能和减少排放是关键的挑战.
- 纳米有机蒙莫里隆石 (OMMT) 和 styrene-butadiene-styrene (SBS) 改性青是有前途的材料.
研究的目的:
- 用纳米-OMMT和SBS修饰的青来准备具有烟雾抑制和增强道路性能的青材料.
- 调查OMMT/SBS复合材料修改对青道路性能的影响.
- 为了评估改性青的高温,低温和耐老化性能.
主要方法:
- 用纳米-OMMT和SBS修改的青混合物的复合修改.
- 风湿学测试:温度扫描,频率扫描,多重应力爬行恢复 (MSCR),曲束风力计 (BBR).
- 原子力显微镜 (AFM) 用于微观结构分析.
- 通过复杂的模量和相角衰老指数对抗衰老的分析.
主要成果:
- OMMT 降低了青对负载应力的敏感性,增强了高温的质性质.
- 修改OMMT增加了爬行刚度,并降低了SBS修改青的爬行速度,降低了低温灵活性.
- 与SBS改性青相比,OMMT/SBS复合物改性青具有更好的耐老性.
- OMMT 抑制氧化,减少 C=O 和 S=O 键的形成,并减缓青的老化.
结论:
- 纳米-OMMT有效地抑制烟雾,并提高了青混合物的高温性能.
- 通过抑制氧化,OMMT提高了SBS改性青的抗衰老能力.
- 虽然OMMT稍微降低了低温裂纹阻力,但其在烟雾抑制和耐老化的好处是显著的.
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