作　　者： ; ;

机构地区： 中南林业科技大学材料科学与工程学院

出　　处： 《中国粉体技术》 2014年第6期66-69,共4页

摘　　要： 以质量比为3：7的固体石蜡和液体石蜡制备的复合石蜡为微胶囊的芯材，以甲苯-2．4-二异氰酸酯和乙二胺为单体．辛基酚聚氧乙烯醚为乳化剂．采用界面聚合法在复合石蜡表面包覆聚脲制备石蜡-聚脲相变微胶囊，探讨乳化转速、乳化剂用量和聚合反应温度对石蜡-聚脲相变微胶囊粒径、包覆效率及蓄热性能的影响。结果表明．在乳化转速为2000r／min．乳化剂与复合石蜡的质量比为0．06，反应温度为70℃的条件下制备的石蜡-聚脲相变微胶囊的平均粒径为3-4μm，熔点为28．1℃．相变潜热为58．4kJ／kg，包覆效率为87．5％。 Microencapsulated paraffin-polyurea phase change materials were prepared by the method of interracial polymerization using composite paraffin with solid-liquid mass ratio of 3：7 as core materials, 2, 4-toluene diisocyanate and ethylenediamine as monomers, octylphenolethoxylates as an emulsifier. The effects of emulsion speed, the amount of emulsifier and polymerization temperature on the particle size, coating efficiency and storage-energy performance of microencapsulated paraffin-polyurea phase change materials were investigated. The results show that when the emulsion speed is 2 000 r/min, the mass ratio of emulsifier to core material is 0.06 and the polymerization temperature is 70 ℃, the microencapsulated paraffin-polyurea phase change materials have betterperformance, including the the average particle size of 3 to 4 μm, melting point of 28.1 ℃, enthalpy of 58A kJ/kg, and coating efficiency of 87.5%.

关 键 词： 相变材料 石蜡 微胶囊 界面聚合

领　　域： [一般工业技术] [化学工程]