| 戴越,唐波,邓鸿,李润柳,吕志鹏.化学通报,2026,89(1):98-107. |
| 新型工艺制备的 PW/CaCO3相变微胶囊性能优化与结构分析 |
| Optimization and Structural Characterization of PW/CaCO3 Phase Change Microcapsules Fabricated via Novel Process |
| 投稿时间：2025-08-09 修订日期：2025-09-28 |
| DOI： |
| 中文关键词: 石蜡 碳酸钙 相变微胶囊 碳酸氢钠 碱性条件 |
| 英文关键词:Paraffin Wax,Calcium Carbonate,Phase Change Microcapsules,Sodium Bicarbonate,Alkaline Conditions |
| 基金项目:江苏省青蓝工程项目(SCZ1908200013)资助 |
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| 中文摘要: |
| 本研究开发了一种基于碱性条件的新型制备工艺,以碳酸氢钠为碳酸源,成功合成以碳酸钙(CaCO3)为壳层、石蜡(PW)为相变芯材的微胶囊。相较于传统工艺制备的PW/CaCO3微胶囊,该新型微胶囊展现出显著提升的热能储存性能。采用四因素四水平正交实验设计,优化确定了微胶囊制备的关键参数:搅拌速率、乳化剂含量及核壳质量比。在核壳质量比1:0.5、十二烷基苯磺酸钠(SDBS)添加量0.19 wt%、搅拌速率900 r/min的优化条件下,所得微胶囊的相变焓(ΔHm)达141.19 J/g,包覆率(ER)为77.99%。扫描电镜(SEM)表征表明,所得微胶囊呈现规则球形形貌与完整的核壳结构,动态光散射法(DLS)测定平均粒径为436.38 nm。该工艺制备的微胶囊具有更光滑致密的表面结构,其优异的熔融潜热(141.19 J/g)和热稳定性表明,该材料在建筑节能、智能纺织品及医疗热管理等领域具有广阔的应用前景。 |
| 英文摘要: |
| This study developed a novel preparation process based on alkaline conditions using sodium bicarbonate as the carbonate source. This process successfully synthesized microcapsules with a calcium carbonate shell layer and a paraffin wax phase change core. Compared to paraffin wax/calcium carbonate (PW/CaCO3) microcapsules prepared using traditional methods, the new microcapsules exhibit significantly improved thermal energy storage performance. A four-factor, four-level orthogonal experimental design was employed to optimize three key parameters for microcapsule preparation: stirring rate, emulsifier content, and core-to-shell mass ratio. Under the optimized conditions of a core-to-shell mass ratio of 1:0.5 and an emulsifier content of 0.19 wt% and a stirring rate of 900 rpm, the phase change enthalpy (ΔHm) of the microcapsules was 141.19 J/g with an encapsulation efficiency (ER) of 77.99%. Scanning electron microscopy (SEM) revealed the microcapsules had a regular spherical morphology and complete core-shell structure. Dynamic light scattering (DLS) measurements determined the average particle size to be 436.38 nm. The microcapsules prepared via this process have smoother, denser surface structures. Their excellent latent heat of fusion (ΔHm = 141.19 J/g) and thermal stability indicate that this material has great potential for use in building energy conservation, smart textiles, and medical thermal management. |
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