지르코니아 담지 할로이사이트 나노튜브를 충전제로 이용한 에폭시 복합체의 기계적, 열적 특성에 관한 연구

Abstract

Epoxy resins are widely used in various industrial fields due to their low cost, good workability, heat resistance, and good mechanical strength. However, they suffer from brittleness, an issue that must be addressed for further applications. Among them, halloysite nanotubes (HNTs) have high thermal and mechanical properties due to the geometric structure of the nanotubes and are widely used as fillers for improving the properties. However, when it is added to epoxy resin, the improvement of dispersibility is not significant. In order to improve the mechanical and thermal properties due to the interaction of zirconia with epoxy resin, we loaded HNTs with zirconia. In this study, zirconia was impregnated on HNT with different loadings using zirconyl chloride octahydrate as a precursor. Mechanical strengths and thermal strengths of epoxy composites with these fillers were investigated. Zirconia impregnated HNTs (Zr/HNT) were characterized by X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD) and tunneling electron microscopy (TEM). Hardening condition of epoxy composites were discovered using differential scanning calorimetry (DSC). Thermal strength of epoxy composites were studied by thermomechanical analysis (TMA). Mechanical strengths of epoxy composites were studied by universal testing machine (UTM). Such as flexural strength and tensile strength were investigated using UTM. Mechanical and thermal strength of epoxy composite with Zr/HNT were improved comparing to those of epoxy composite with HNT. They were also increased as the zirconia loading on HNT was increased.