# Controlling the Size of Hydrotalcite Particles and Its Impact on the Thermal Insulation Capabilities of Coatings

## TL;DR

This study explores how adjusting the size of hydrotalcite particles improves the thermal insulation of coatings, offering a sustainable solution for energy-efficient buildings.

## Contribution

The study systematically explores how MTS dosage affects LDH particle size and insulation performance, revealing an optimal 4 wt% MTS for maximum thermal insulation.

## Key findings

- A 4 wt% MTS dosage yields tightly interconnected hydrotalcite lamellar structures with optimal thermal insulation.
- MTS-modified LDHs achieved a temperature difference of approximately 25.5 °C in insulation performance.
- Characterization of UV-visible diffuse reflectance and thermal conductivity clarified the insulation mechanism of MTS-modified LDHs.

## Abstract

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.