关于多壁碳纳米管 (MWCNTs) /聚烯纤维 (PP纤维) 水泥基材料的性能研究
Xiangjie Niu1, Yuanzhao Chen1,2,3, Zhenxia Li1,2,3
1School of Civil Engineering and Communication, North China University of Water Resources and Electric Power, Zhengzhou 450045, China.
Polymers
|January 11, 2024
概括
将多壁碳纳米管 (MWCNT) 和聚烯纤维 (PP纤维) 添加到水泥中,可以显著提高其机械性能和耐用性. 在MWCNT和PP纤维的特定度下观察到最佳结果,从而提高了强度和减少了材料降解.
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:
- 基于水泥的材料在建筑中至关重要,但在机械性能和耐用性方面经常面临限制.
- 提高水泥性能对于可持续和弹性基础设施至关重要.
研究的目的:
- 研究多壁碳纳米管 (MWCNTs) 和聚烯纤维 (PP纤维) 对基于水泥的材料的联合作用.
- 优化MWCNT和PP纤维的含量,以提高机械强度和耐用性.
- 分析这些添加剂引起的微观结构变化.
主要方法:
- 将不同数量的MWCNT和PP纤维纳入水泥矩阵.
- 通过屈曲,压缩和裂纹抗拉强度测试来评估机械性能.
- 通过干燥收缩和冷解周期测试来评估耐用性.
- 使用扫描电子显微镜 (SEM) 和侵入孔径计 (MIP) 进行微观结构和毛孔结构分析.
主要成果:
- 最佳的MWCNT含量 (0.1-0.15%) 增加了9.5%的压力强度,减少了27.9%的质量损失.
- 最佳的PP纤维含量 (0.2-0.3%) 提高了性,增加了19.1%的屈曲强度,并减少了干燥收缩和水损失率.
- MWCNTs改善了PP纤维-水泥矩阵粘合,补偿了PP纤维引起的缺陷,并减少了有害的毛孔,从而导致更密集的微观结构.
结论:
- 结合MWCNT和PP纤维的添加显著改善了基于水泥的材料的机械性能和耐用性.
- MWCNT提高了压力强度和耐用性,而PP纤维提高了性和抗裂性能.
- MWCNTs和PP纤维的协同效应导致一种具有优越性能和更密集的内部结构的复合材料.
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