Characterization of polystyrene-silica@ n-tetradecane composite nano-encapsulated phase change material and its emulsion performance

FANG Yutang; XIE Hongzhou; LIANG Xianghui; YU Huimin; GAO Xuenong; ZHANG Zhengguo

doi:10.11949/j.issn.0438-1157.20141287

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Characterization of polystyrene-silica@ n-tetradecane composite nano-encapsulated phase change material and its emulsion performance

更新时间：2025-12-10

- Characterization of polystyrene-silica@ n-tetradecane composite nano-encapsulated phase change material and its emulsion performance
- CIESC Journal Issue 2, Pages: 800-805(2015)
- 作者机构：
  
  华南理工大学传热强化与过程节能教育部重点实验室,广东,广州,510640
- 作者简介：
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20141287
  CLC： Q316.3
- Online First：05 February 2015，
  
  Published：05 February 2015
- 稿件说明：
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FANG Yutang, XIE Hongzhou, LIANG Xianghui, et al. Characterization of polystyrene-silica@ n-tetradecane composite nano-encapsulated phase change material and its emulsion performance[J]. CIESC Journal, 2015, (2): 800-805.
DOI：

FANG Yutang, XIE Hongzhou, LIANG Xianghui, et al. Characterization of polystyrene-silica@ n-tetradecane composite nano-encapsulated phase change material and its emulsion performance[J]. CIESC Journal, 2015, (2): 800-805. DOI： 10.11949/j.issn.0438-1157.20141287.

摘要

采用细乳液原位聚合法

研制了以正十四烷(Tet)为芯材、高热导率二氧化硅(SiO2)改性的聚苯乙烯(PS)为壳层的新型复合纳米相变胶囊蓄冷材料;对复合胶囊形貌、组成以及热物性进行纳米粒度、透射电镜(TEM)、X射线光电子能谱(XPS)、差示扫描量热(DSC)以及热失重(TG)等表征

并测试其乳液的热导率、比热容、黏度及机械稳定性。结果显示:复合相变胶囊平均粒径为64.90 nm

具有规整的球形核壳结构

表面硅含量(质量分数)为3.27%

相变潜热达83.38 J·g-1

复合壳材对芯材有很好的保护作用;其乳液的热导率及比热容峰值均优于未用SiO2改性的纳米胶囊乳液

且乳液具有较高机械稳定性和较低黏度

可作为潜在的蓄冷用功能热流体。

Abstract

Composed of polystyrene (PS) modified by high thermal conductivity silica (SiO2) as shell

and n-tetradecane (Tet) as core

a novel PS-SiO2 @ Tet composite nano-encapsulated phase change material (CNEPCM) for cold thermal energy storage was synthesized by mini-emulsion in-situ polymerization. The morphology

chemical structure and thermal performance of CNEPCM were characterized with particle size analyzer

transmission electron microscope (TEM)

X-ray photoelectron spectroscopy(XPS)

differential scanning calorimetry (DSC) and thermogravimetric analysis (TG)

respectively. Coefficient of thermal conductivity

specific heat capacity

viscosity and mechanical stability of the synthesized latex were tested. The synthesized CNEPCM with well-defined spherical core-shell structure and z-average particle size of 64.9 nm had high latent heat capacity (Tm 2.13℃

83.38 J·g-1) and good thermal stability. Compared with the unmodified emulsion

coefficient of thermal conductivity and specific heat capacity of the synthesized latex were improved as a result of the presence of high thermal conductivity silica

indicating a promising potential functional thermal fluid for cold thermal energy storage.

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