关于残留聚合物超塑剂对石墨烯-水泥复合材料性能影响的研究
Ki Yun Kim1, Seok Hwan An1, Jea Uk Lee1
1Department of Advanced Materials Engineering for Information and Electronics, Integrated Education Institute for Frontier Science and Technology (BK21 Four), Kyung Hee University, 1732 Deogyeong-daero, Giheung-gu, Yongin-si 17104, Gyeonggi-do, Republic of Korea.
Polymers
|April 13, 2024
概括
剩余聚碳酸乙烯 (rPCE) 显著改善了水泥复合材料中的石墨烯分散,增强了机械性能. 这项研究量化了rPCE的数量.
科学领域:
- 材料科学 材料科学 材料科学
- 纳米技术 纳米技术
- 土木工程 土木工程是指土木工程.
背景情况:
- 石墨烯的独特特性使其成为一个有前途的水泥纳米填充剂.
- 石墨烯有限的水分散性需要聚合物超塑性剂,如聚碳酸乙烯 (PCE).
- 在石墨烯水泥复合材料中残留PCE (rPCE) 的作用仍然不太清楚.
研究的目的:
- 系统地分析rPCE对石墨烯分散的影响.
- 研究rPCE对石墨烯水泥复合材料 (GCC) 机械性能的影响.
- 阐明rPCE影响石墨烯分散和水泥化的机制.
主要方法:
- 通过离心和热分析精确量化rPCE含量.
- 使用光学显微镜,粒子大小分析和接触角度测量对石墨烯分散的评估.
- 评估GCC的机械性能,特别是压力强度.
- 使用野外发射扫描电子显微镜 (FESEM) 和X射线衍射 (XRD) 检查分散和水合的微结构分析.
主要成果:
- 与石墨烯相比,量化rPCE含量为78.0重量%.
- 证明rPCE对于有效的石墨烯分散和改善与水泥的界面亲和力至关重要.
- 观察到GCC的压力强度大约有10%的显著增强 (68.36 MPa与普通水泥的62.33 MPa相比).
结论:
- 剩余的PCE在实现水泥矩阵内均的石墨烯分散方面发挥着关键作用.
- rPCE增强了石墨烯和水泥之间的界面粘合,从而提高了机械性能.
- 这些发现强调了考虑剩余超级可塑剂含量的重要性,以优化石墨烯水泥复合材料的性能,并促进水泥的水化.
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