相反转界面细乳液聚合法制备石蜡纳胶囊与表征

发布时间：2018-07-07 09:00

本文选题：相反转法 + 界面细乳液聚合　；参考：《高分子材料科学与工程》2017年03期

【摘要】：采用相反转乳化的界面细乳液聚合法制备了以交联聚甲基丙烯酯甲酯为壁材,以石蜡为芯材的纳胶囊。利用光学显微镜、激光粒度分析仪、透射电镜、红外光谱仪、差示扫描量热分析仪等研究了含氟助乳化剂FC-4430、丙烯酸十八酯(SA)及芯材投料量对聚合过程、产品表面形貌、粒径、化学结构、储热性能和包覆率的影响。结果表明,FC-4430对相反转有促进作用,可降低胶囊粒子尺寸且利于包封;SA能提高纳胶囊的包覆率和热稳定性;当FC-4430用量为0.4%,SA用量为2%,m(core)∶m(shell)为2∶1时,纳胶囊的相变潜热为91.7 J/g,包覆率为63.3%,包覆效率为95.0%,胶囊粒子为球形,表面光滑,粒径为0.6~1μm,呈明显的核壳结构,芯材直径为300~500 nm。
[Abstract]:Nanocapsules with crosslinked poly (methyl methacrylate) as wall material and paraffin as core material were prepared by interfacial fine emulsion polymerization with reverse emulsification. By means of optical microscope, laser particle size analyzer, transmission electron microscope, infrared spectrometer, differential scanning calorimeter, etc., the polymerization process of fluorine-containing co-emulsifier FC-4430, octadecyl acrylate (SA) and its core material were studied. The influence of chemical structure, heat storage performance and coating rate. The results showed that FC-4430 could promote the reverse transformation, decrease the particle size of the capsule and improve the encapsulation efficiency and thermal stability of the capsule, when the dosage of FC-4430 was 0.4 and SA was 2mm (core): M (shell) was 2:1, The phase change latent heat of the capsule is 91.7 J / g, the coating efficiency is 63.3, the encapsulation efficiency is 95.0, the particle is spherical, the surface is smooth, the particle size is 0.610 渭 m, and the core material diameter is 300 ~ 500 nm.
【作者单位】：大连工业大学纺织与材料工程学院;辽宁省制浆造纸重点实验室;
【基金】：国家自然科学基金资助项目(31200456) 省教育厅优秀人才项目(LJQ2012046)
【分类号】：TQ316.334

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