定制功能性石墨烯衍生地质聚合物纳米复合材料:界面相互作用和机械强度增强
Manali Rathee1,2, Harikrishnan K Surendran3, Aditya Thakur1
1Hybrid Porous Materials Laboratory, Department of Chemistry, Indian Institute of Technology Jammu, Jammu & Kashmir 181221, India.
ACS materials Au
|July 16, 2025
概括
酸石墨烯 (G-PO3H) 显著增强地质聚合物混凝土,通过改善颗粒分散和矩阵相互作用来提高压力强度和可加工性. 这种可持续的替代方案为绿色混凝土应用提供了卓越的性能.
科学领域:
- 材料科学 材料科学 材料科学
- 纳米技术 纳米技术
- 绿色化学 绿色化学
背景情况:
- 地质聚合物为普通波特兰水泥 (OPC) 提供了可持续的替代品,因为它们的环境效益和机械性能.
- 石墨烯衍生物被探索为地质聚合物复合材料中的强化剂.
- 像飞灰和多洛米特这样的废物材料被用于地质聚合物合成.
研究的目的:
- 用各种功能性石墨烯衍生物合成和描述基于石墨烯的地质聚合物纳米复合材料.
- 调查功能组对石墨烯衍生物对地质聚合物的机械性能的影响.
- 用密度功能理论 (DFT) 阐明分子相互作用和界面粘附机制.
主要方法:
- 地质聚合物纳米复合材料的合成,其中包括氧化石墨烯 (GO),硫化石墨烯氧化物 (G-SO3H),硫基烯 (G-SH) 和酸盐石墨烯 (G-PO3H).
- 机械性能的表征,包括设置时间,流动性,压力强度和吸水能力.
- 使用拉曼光谱和密度函数理论 (DFT) 计算对界面相互作用的分析.
主要成果:
- 基于酸石墨烯 (G-PO3H) 的地质聚合物纳米复合材料 (FDGP) 与其他石墨烯衍生物相比,表现出优越的压力强度 (7天后45.60 MPa,28天后50.20 MPa).
- 石墨烯衍生物上的功能组增强了粒子分散和矩阵密度,从而改善了机械性能.
- DFT的计算和表征证实了由酸盐功能组促进的强结合和界面粘附.
结论:
- 酸石墨烯 (G-PO3H) 是一种高效的添加剂,可提高地质聚合物的性能,提供更好的可加工性和机械强度.
- 该研究表明了功能化石墨烯衍生物在开发先进绿色混凝土技术方面的潜力.
- 这些发现强调了分子相互作用和界面工程对于优化地质聚合物纳米复合材料的重要性.
相关概念视频
01:28Classification and Mechanical Properties of Synthetic Polymers
Synthetic polymers are classified as elastomers, fibers, or plastics based on their crystallinity. Crystallinity, the degree of long-range order in the solid state, influences the mechanical properties (stretching or contracting) of elastomers. Elastomers are flexible polymers that can expand or contract easily upon the application of an external force. They have numerous crosslinks that pull them back into their original shape when stress is removed. Silicones, for instance, are highly elastic...
01:12Bonding and Strength of Aggregate
The bond between aggregate particles and the cement matrix is significantly influenced by the shape and surface texture of the aggregates. High-strength concretes benefit from a rougher texture, which leads to stronger bonding due to greater adhesion. Angular aggregates with larger surface areas also enhance this bond. The bonding quality, however, is complex to assess as no universally accepted test exists. Good bonding is indicated when a crushed concrete specimen shows some aggregate...
01:30Superplasticizers
Superplasticizers are advanced admixtures that enhance the workability of concrete by lowering the water content without compromising the strength of the material. These substances are highly effective water reducers, improving concrete flow, making it easier to work with, and enabling concrete to reach inaccessible areas or densely reinforced sections without mechanical vibration. The key components in superplasticizers are either sulfonated melamine or naphthalene formaldehyde condensates,...