Zhao Yanhua, Shen Guanhua, Wang Yongli, Hao Xiangying, Li Huining
Guangdong Provincial Key Laboratory of Environmental Health and Land Resource, College of Environmental and Chemical Engineering, Zhaoqing University, Zhaoqing 526061, China.
Zhaoqing Environmental Functional Materials Engineering Technology Center, College of Environmental and Chemical Engineering, Zhaoqing University, Zhaoqing 526061, China.
Materials (Basel). 2024 Apr 26;17(9):2046. doi: 10.3390/ma17092046.
This study focuses on the development of high-performance insulation materials to address the critical issue of reducing building energy consumption. Magnesium-aluminum layered double hydroxides (LDHs), known for their distinctive layered structure featuring positively charged brucite-like layers and an interlayer space, have been identified as promising candidates for insulation applications. Building upon previous research, which demonstrated the enhanced thermal insulation properties of methyl trimethoxysilane (MTS) functionalized LDHs synthesized through a one-step in situ hydrothermal method, this work delves into the systematic exploration of particle size regulation and its consequential effects on the thermal insulation performance of coatings. Our findings indicate a direct correlation between the dosage of MTS and the particle size of LDHs, with an optimal dosage of 4 wt% MTS yielding LDHs that exhibit a tightly interconnected hydrotalcite lamellar structure. This specific modification resulted in the most significant improvement in thermal insulation, achieving a temperature difference of approximately 25.5 °C. Furthermore, to gain a deeper understanding of the thermal insulation mechanism of MTS-modified LDHs, we conducted a thorough characterization of their UV-visible diffuse reflectance and thermal conductivity. This research contributes to the advancement of LDH-based materials for use in thermal insulation applications, offering a sustainable solution to energy conservation in the built environment.
本研究聚焦于开发高性能绝缘材料，以解决降低建筑能耗这一关键问题。镁铝层状双氢氧化物（LDHs），因其独特的层状结构而闻名，该结构具有带正电荷的水镁石状层和层间空间，已被确定为绝缘应用的有前景的候选材料。基于先前的研究，该研究表明通过一步原位水热法合成的甲基三甲氧基硅烷（MTS）功能化LDHs具有增强的隔热性能，本工作深入系统地探索了粒径调控及其对涂层隔热性能的相应影响。我们的研究结果表明MTS的用量与LDHs的粒径之间存在直接关联，4 wt%的MTS最佳用量产生的LDHs呈现出紧密相连的水滑石层状结构。这种特定的改性导致隔热性能得到最显著的改善，实现了约25.5℃的温差。此外，为了更深入地了解MTS改性LDHs的隔热机理，我们对其紫外可见漫反射和热导率进行了全面表征。本研究有助于推进基于LDHs的材料在隔热应用中的使用，为建筑环境中的节能提供了一种可持续的解决方案。
