以三聚氰胺改性的脲醛树脂为囊壁,通过原位聚合法分别对非离子型和阴离子型石蜡乳液进行包覆,制备微胶囊.研究结果表明,采用由硬脂酸和氨水制备得到的阴离子型石蜡乳液为囊芯材料,囊芯与囊壁质量比为1．6时,包覆率达52．41％,囊壁可提供良好的热传导能力.制备得到的微胶囊热焓值为166 J/g,具有较好的相变储能效果.
In this paper,the modified UF resin/paraffin micro-capsules were prepared by microencapsulation technology with melamine modified urea-formaldehyde resin as capsule wall and anionic and non-ionic paraffin e-mulsion as capsule core.The results showed that when the material of capsule core is anionic paraffin emulsion prepared by Stearic acid and ammonium hydroxide,the mass ratio of the capsule core and wall is 1.6,we can prepare the micro-capsules whose coating rate is 52.41%,average particle size is 20 μm,wall thickness is 500 nm.The micro-capsule’s enthalpy is 1 66 J/g,has great effect of phase change energy storage.
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