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以石蜡为芯材,脲醛树脂(UF)为囊材,纳米铁粒子为磁性材料,用原位聚合法制备了磁性相变微胶囊.采用差示扫描量热仪(DSC)、扫描电子显微镜(SEM)、振动样品磁强计(VSM)和电感耦合等离子直读光谱仪(ICP)对产品的热性能、表面形态、磁性能以及微胶囊中纳米铁粒子含量进行了表征和测量,研究了纳米铁粒子的加入对微胶囊的表面形态的影响.DSC测试结果显示石蜡微胶囊化后并不影响其相变点,保持了石蜡原有的储热特性.VSM和ICP测试表明磁性相变微胶囊的比饱和磁化强度和剩余比磁化强度等磁性参数随纳米铁粒子含量的增加而增大.
The magnetic phase-change microcapsules were prepared by in-situ polymerization using paraffin as the core material, urea-formaldehyde resin (UF) as the encapsulation material and nano-iron particles as the magnetic material.Using differential scanning calorimetry (DSC), scanning electron microscopy SEM, VSM and ICP were used to characterize and measure the thermal properties, surface morphology, magnetic properties and the content of nano-iron particles in microcapsules. The effects of nano-sized iron The influence of the addition of particles on the surface morphology of microcapsules.DSC test results show that paraffin wax encapsulation does not affect the phase transition point and maintain the original thermal storage characteristics of paraffin wax.VSM and ICP tests show that magnetic phase change microcapsules The magnetic parameters such as saturation magnetization and remanent magnetization increase with the increase of the content of nano-iron particles.