一个机械研究的阴离子修饰纤维素纳米纤维-增强水泥复合材料复合材料
Wei Tang1, Tengfei Fu1, Mingming Guo2
1College of Transportation and Civil Engineering, Fujian Agriculture and Forestry University, Fuzhou 350108, China.
Materials (Basel, Switzerland)
|January 10, 2026
概括
阴离子改性纤维素纳米纤维素 (CNF) 通过提高机械强度和延迟裂开始,提高水泥性能. 这种可再生纳米材料为水泥复合材料中的传统无机纳米粒子提供了更安全的替代品.
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:
- 纤维素纳米纤维 (CNF) 是可再生的纳米材料,具有高强度和性等可取性质.
- 与传统无机纳米材料相比,CNF具有优势,包括更好的分散性,更低的成本和降低的健康风险.
- 提高CNF与水泥材料的兼容性对于其在混凝土中的应用至关重要.
研究的目的:
- 为了提高纤维素纳米纤维 (CNF) 与水合水泥的兼容性,使用阴离子表面活性剂修饰.
- 为了评估阴离子修饰的CNF对水泥糊的机械性能,水化行为和裂纹耐受性的影响.
- 为了阐明在水泥复合材料中的阴离子修饰CNF的增强机制.
主要方法:
- 混凝土糊样品被修改为阴离子修改的CNF.
- 机械性能通过压力和屈曲强度测试进行了评估.
- 进行了水化热,受控环裂变,微硬度,XRD和BSE-SEM/EDS分析.
主要成果:
- 阴离子修饰的CNF显著提高了水泥糊的机械性能,最佳剂量为0.15重量%.
- 添加阴离子修饰的CNF在受约束环测试中延迟了裂的开始,并增加了早期的水合率.
- 微观结构分析表明,形成了更密集的水化产品,表明微观结构得到了改进.
结论:
- 阴离子修饰的CNF有效地提高了水泥复合材料的机械性能和耐用性.
- 在水泥中变CNF的最佳剂量被确定为0.15重量%.
- 建议使用内部固化和"短路扩散"等机制来解释观察到的增强.
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