Preparation and performance evaluation of paraffin@SiO2 microencapsulated phase change material and its thermal insulation effect in architectural coatings

IF 4.9 2区化学 Q2 CHEMISTRY, PHYSICAL

Colloids and Surfaces A: Physicochemical and Engineering Aspects Pub Date : 2025-05-22 DOI:10.1016/j.colsurfa.2025.137287

Baolian Zhang , Yuhao Zhu , Yingmin Yuan , Qi Fang , Hongbin Zhao

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引用次数: 0

Abstract

Room temperature phase change materials have significant potential to enhance energy conservation; however, their application is limited by issues such as leakage and compatibility. In this study, paraffin was microencapsulated using advanced microencapsulation technology to address these challenges. Sodium silicate was employed as a silicon source, while methyltriethoxysilane (MTES) served as a modifier. Paraffin@SiO₂ microencapsulated phase change material (MEPCM) was prepared using the chemical precipitation method. The results demonstrated that, under reaction conditions of 45 °C, a pH of 3.5, a core-to-shell ratio of 1:1, and a composite emulsifier consisting of cetyltrimethylammonium bromide (CTAB) and OP-10, the core material content reached 75.52 %, which was 23.09 % higher than that of the unmodified sample. Additionally, the melt permeability rate decreased to 9.14 %. When 10 % MEPCM was incorporated into emulsion paint, the film maintained good performance and significantly extended the heat preservation time by 19.44 %. This study provides a practical strategy for developing cost-effective, high-stability building phase change coatings.

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paraffin@SiO2微胶囊化相变材料的制备、性能评价及其在建筑涂料中的保温效果

室温相变材料具有显著的节能潜力；然而，它们的应用受到诸如泄漏和兼容性等问题的限制。在本研究中，石蜡采用先进的微胶囊化技术进行微胶囊化，以解决这些问题。硅酸钠为硅源，甲基三乙氧基硅烷（MTES）为改性剂。采用化学沉淀法制备了Paraffin@SiO 2微囊化相变材料（MEPCM）。结果表明，在45℃、pH = 3.5、核壳比为1:1的条件下，以十六烷基三甲基溴化铵（CTAB）和OP-10为复合乳化剂，制得的样品芯材含量达到75.52 %，比未改性样品高23.09 %。熔体渗透率降低到9.14 %。在乳胶漆中加入10% % MEPCM后，漆膜保持了良好的性能，保温时间明显延长了19.44 %。本研究为开发高性价比、高稳定性的建筑相变涂料提供了可行的策略。

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来源期刊

Colloids and Surfaces A: Physicochemical and Engineering Aspects 化学-物理化学

CiteScore

8.70

自引率

9.60%

发文量

2421

审稿时长

56 days

期刊介绍： Colloids and Surfaces A: Physicochemical and Engineering Aspects is an international journal devoted to the science underlying applications of colloids and interfacial phenomena. The journal aims at publishing high quality research papers featuring new materials or new insights into the role of colloid and interface science in (for example) food, energy, minerals processing, pharmaceuticals or the environment.