摘要
为防止石蜡类相变材料在使用过程中发生泄漏,以甲基丙烯酸甲酯和甲基丙烯酸乙酯为壁材原料,采用悬浮聚合法对石蜡进行包覆,制备了相变温度为25℃、相变潜热值为83.3J/g、耐热温度为150℃的石蜡相变微胶囊,并将其添加到水性硅丙树脂中,得到了具有调温功能的涂料。采用傅里叶红外光谱仪、扫描电子显微镜、差热扫描量热仪、热重分析仪等分析了分散剂浓度、引发剂浓度以及芯材比等因素对石蜡相变微胶囊形貌、热性能、热稳定性、芯材含量的影响;采用涂层附着力测试仪、铅笔划痕实验仪和自制的模拟装置研究微胶囊在水性硅丙树脂的添加量对涂料漆膜的附着力、硬度和调温性能的影响。研究表明:当分散剂马来酸酐共聚物钠盐(NaSMA)质量浓度为10%、引发剂过氧化十二酰(LPO)质量浓度为2%、芯材质量与壁材单体投入质量比为2∶1时能够得到球型规整,分散性好、芯材含量高的石蜡相变材料微胶囊,石蜡相变微胶囊在水性硅丙树脂中最佳的添加量为15%。
In order to prevent leakage of paraffin phase change material during use, paraffin phase change microcapsules with a phase transition temperature of 25 ℃,latent heat value of phase change of 83.3 J/g, and heat resistance temperature of 150 ℃ were prepared by suspension polymerization with methyl methacrylate and ethyl methacrylate as wall materials. It was added into waterborne silicone-acrylic resin to prepare coating with temperature regulation function. The effect of the concentration of dispersant and initiator, and core material ratio on the microcapsule morphology, thermal properties, thermal stability, and core content of paraffin phase change microcapsules was studied by Fourier transform infrared spectroscopy, scanning electron microscope, differential scanning calorimeter and thermogravimetric analyzer. The impact of additive content of microcapsules in waterborne silicone-acrylic resin on the adhesion, hardness and temperature regulation performance of the paint film was studied with coating adhesion tester, pencil scratch tester and self-made simulation device. The results show that under the conditions that the mass concentration of dispersant of maleic anhydride copolymer(NaSMA) is 10%, the mass concentration of initiator of dilauroyl peroxide(LPO) is 2%, and the ratio of core mass to wall material is 2∶1, paraffin phase change material microcapsules of regular spherical shape, good dispersibility and high core material content can be obtained. The optimum addition of paraffin phase change microcapsules in waterborne silicone-acrylic resin is 15%.
作者
俞滨滨
裴克梅
YU Binbin;PEI Kemei(School of Science,Zhejiang Sci-Tech University,Hangzhou 310018,China)
出处
《浙江理工大学学报（自然科学版）》
2020年第5期602-608,共7页
Journal of Zhejiang Sci-Tech University(Natural Sciences)
基金
国家自然科学基金项目(21673208)。
关键词
悬浮聚合
石蜡
相变微胶囊
水性硅丙树脂
储能调温
suspension polymerization
paraffin
phase change microcapsules
waterborne silicone acrylic resin
energy storage and temperature regulation
