Design and preparation of carbon fiber, carbon particle doped C4H10O4 phase change thermal storage materials and performance

Abstract

C4H10O4 is an environmentally friendly phase change material that can release high phase change enthalpy, but its high super-cooling degree and low thermal conductivity hinder its wide application. This paper adopted C4H10O4 as a phase change material, and the composite phase change material was prepared by melting and blending C4H10O4 with carbon fiber, carbon particles. The results indicate that the composite phase change material with 1.5% filler has better comprehensive properties. Compared with pure C4H10O4, 167% improvement in thermal conductivity, the under-cooling decreases by 42%, and 3% increase in enthalpy of phase change. FT-IR analysis shows that no new substances are produced, and TG analysis shows that the chemical stability is good. Heat storage/release analysis shows that the exothermic time reaches 4 hours, and the exothermic time is 5 °C higher.