Abstract
In this study, a new class of thermal insulation composites was prepared by blending a modified hollow glass microsphere (HGM) with furan resin. The particle dispersion between the microparticles and resin matrix was improved using 3-methacryloxypropyltrimethoxy silane (KH-570). Furthermore, the structure and morphology of the modified HGM were characterised by Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), and scanning electron microscopy (SEM). In addition, the effects of the modified HGM on the thermal insulation, flame retardancy, and thermal properties of the composites were investigated. The thermal conductivity of the composites was lower than that of the native furan resin. The minimum thermal conductivity of the composites was 0.0274 W/m·K; the flame retardancy of the composites improved, and the limiting oxygen index become a maximum of 31.6%, reaching the refractory material level. Furthermore, the thermal analysis of the composites demonstrated enhanced thermal stability. This study demonstrates that the composite material exhibited good thermal insulation performance and flame retardancy and that it can be applied in the field of thermal insulation.
Highlights
Thermal insulation materials are developed to reduce heat transmission, which is based on bonding mechanical or chemical combination to decrease the heat transmission via various combined approaches [1]
The thermal insulation materials are classified as organic insulation materials, inorganic insulation materials, and composite insulation materials according to the physical and chemical properties of the raw materials
Furan resin is extensively used within the foundry industry and as wood adhesives [11,12], which exhibits great performance at flame retardancy, unlike most organic materials [13,14]
Summary
Thermal insulation materials are developed to reduce heat transmission, which is based on bonding mechanical or chemical combination to decrease the heat transmission via various combined approaches (i.e., convection, radiation, and conduction) [1]. A flame-retardant and environmentally friendly thermal insulation material should be developed. Furan resin is extensively used within the foundry industry and as wood adhesives [11,12], which exhibits great performance at flame retardancy, unlike most organic materials [13,14]. Furan of resin exhibits poorreduce thermal insulation performance when compared with those. The HGM/resin filled with inert gas, of and its hollow core results in excellent adiabaticity. The HGM/furan resin composites usedretardancy as a flame-retardant insulation of the excellent thermal insulation propertiescan andbe flame of the HGMthermal [24]. MaterialInbecause of the excellent thermal insulation properties flame retardancy the HGM [24]. AndFurthermore, X-ray photoelectron spectroscopy (XPS)flame wereretardancy, used to analyse the grafting of KH-570 with the thermal performance, and thermal insulation of the composites.
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