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Synthesis and Properties of Microencapsulated Solid Paraffin Phase Change Materials

机译：微囊化固体石蜡相变材料的合成与性能

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摘要

To prepare the phase change materials for efficient low-temperature latent heat storage, microcapsules with commercial solid paraffin were synthesized by using in-situ polymerization process. Liquid paraffin was used first as core materials since it facilitates the direct observation of containment by the shell of melamine-formaldehyde resin (MF resin), and examines easily the optimal synthesizing condition. The effects of emulsion processes, pre-polymerization conditions, shell material content and reaction time on the quality of microcapsules were investigated. The experimental investigations show that the optimal process of synthesizing liquid paraffin microcapsules is adoptable to that of solid paraffin microcapsules. The as-prepared solid paraffin microcapsules show high quality. The microcapsules surface was smooth and dense, and be free of any adhesion. The measurements show that in the microcapsules solid paraffin was well encapsulated by MF resin. The microcapsule size was almost within the range of 6～33 μm and most intense distribution at 23 μm. DSC measurements gave two endothermic peaks with initial phase change temperature at 35℃ and 50℃ respectively, and the total enthalpy was above 134 J/g.
机译：为了制备高效低温潜热的相变材料，采用原位聚合法合成了具有工业固体​​石蜡的微胶囊。首先使用液体石蜡作为核心材料，因为它有助于直接观察三聚氰胺-甲醛树脂（MF树脂）的外壳中的包容性，并易于检查最佳合成条件。研究了乳液工艺，预聚合条件，壳材料含量和反应时间对微胶囊质量的影响。实验研究表明，合成液体石蜡微胶囊的最佳工艺可采用固体石蜡微胶囊的最佳工艺。所制备的固体石蜡微胶囊显示出高品质。微胶囊表面光滑且致密，没有任何粘附。测量结果表明，在微胶囊中，固体石蜡被MF树脂很好地包裹。微胶囊的大小几乎在6〜33μm的范围内，分布最集中在23μm。 DSC测量得到两个吸热峰，初始相变温度分别为35℃和50℃，总焓高于134 J / g。

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  • 来源
  • 会议地点 Shenzhen(CN)
  • 作者

    Zhe Xu; Jianqiang Li; Guocai Zhang;

  • 作者单位

    National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China,Graduate University of Chinese Academy of Sciences, Beijing 100049, China;

    National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China;

    National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China,Graduate University of Chinese Academy of Sciences, Beijing 100049, China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    phase change materials; thermal energy storage; paraffin; microencapsulation;

    机译：相变材料；热能存储；石蜡;微囊化;

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