| 摘要 |
Composite comprises a solidified melt mixt. contg.; (a) 15-22 wt.% polyolefin resin selected from uncrosslinked HDPE and polypropylene; (b) 7-12 wt.% ethylene copolymer selected from ethylene-vinyl acetate copolymer and ethylene-(m)ethyl acrylate copolymer; (c) 7-16 wt.% silica particles having a surface area of 50-500 m2g and prim. particle sizes of 0.005-0.025mu m; and (d) 55-60 wt.% phase change material selected from crystalline alkyl hydrocarbons, crystalline fatty acids, crystalline fatty acid ester, crystalline 1-olefins, crystalline prim. alcohols, crystalline alicyclic hydrocarbons and crystalline aromatic hydrocarbons. Also claimed is prepn. of such a composite comprising melting (d), stirring (c) into the melted (d) until a stiff gel is formed, adding (a) and (b), heated to melt (a) and (b), a mixing vigorously to form a uniform viscous gel, cooling and gel to solidify it into a mouldable composite, and forming the mouldable composite into a shape useful for thermal energy storage. |
