Studies on Nanosilica Modified Paraffin Microcapsule Phase Change Energy Storage Materials

Qiu-xiang Zhang; Jian-hua Chen; Hong-bin Lu; Wei Tang; Yu Lu; Yang-zhi Gao

doi:10.11777/j.issn1000-3304.2015.14410

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Studies on Nanosilica Modified Paraffin Microcapsule Phase Change Energy Storage Materials

Research Article | 更新时间：2021-03-19

- Studies on Nanosilica Modified Paraffin Microcapsule Phase Change Energy Storage Materials
- Acta Polymerica Sinica Issue 6, Pages: 692-698(2015)
- 作者机构：
  
  1. 南京工业大学材料科学与工程学院,南京,210009
  2. 南京大学南通材料工程技术研究院,南通,226019
  3. 常熟理工学院化学与材料工程学院常熟,215500
- 作者简介：
- 基金信息：
- DOI：10.11777/j.issn1000-3304.2015.14410
  CLC：
- Published：20 June 2015，
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Qiu-xiang Zhang, Jian-hua Chen, Hong-bin Lu, Wei Tang, Yu Lu, Yang-zhi Gao. Studies on Nanosilica Modified Paraffin Microcapsule Phase Change Energy Storage Materials. [J]. Acta Polymerica Sinica (6):692-698(2015)
DOI：

Qiu-xiang Zhang, Jian-hua Chen, Hong-bin Lu, Wei Tang, Yu Lu, Yang-zhi Gao. Studies on Nanosilica Modified Paraffin Microcapsule Phase Change Energy Storage Materials. [J]. Acta Polymerica Sinica (6):692-698(2015) DOI： 10.11777/j.issn1000-3304.2015.14410.

摘要

以石蜡为芯材

甲基丙烯酸甲酯-丙烯酸共聚物为壁材

纳米SiO2为改性剂

采用原位聚合法制备了石蜡微胶囊相变储能材料

系统研究了添加纳米SiO2对石蜡微胶囊相变材料性能的影响;采用傅里叶变换红外光谱(FTIR)、扫描电子显微镜(SEM)、示差扫描量热法(DSC)和热重分析(TGA)等对石蜡微胶囊相变材料的化学结构、表面形貌和热性能进行了表征.研究表明

纳米SiO2能够有效提高微胶囊壁材的热稳定性

当丙烯酸酯壁材中添加3%改性纳米SiO2时

微胶囊呈球形且表面光滑

尺寸250~300 nm

具有良好的储热能力

相变潜热高达134.79 J/g

分解温度比未添加改性纳米SiO2的石蜡微胶囊提高了40 K

经过1000次热循环测试

石蜡渗漏率仅2.96%.

Abstract

Microencapsulated phase change materials (MicroPCMs) were prepared using paraffin as core

methyl methacrylate (MMA) and acrylic acid (AA) copolymer as shell

and nanosilica as modifier via in situ polymerization.The effects of the nanosilica on the properties of the MicroPCMs were investigated.The MicroPCMs were characterized by Fourier transform infrared spectroscopy (FTIR)

scanning electron microscopy (SEM)

differential scanning calorimetry (DSC) and thermogravimetry (TGA).The results show that the nanosilica effectively improves the thermostability of the MicroPCMs.The MicroPCMs modified by 3 wt% nanosilica present smooth and spherical morphology with the diameter of 250~300 nm.The MicroPCMs have a high latent heat of 134.79 J/g and the degradation temperature is obviously increased by 40 K in comparison with that of the unmodified MicroPCMs

and the paraffin leakage rate of the modified MicroPCMs is only 2.96% after 1000 times thermal cycling test.

关键词

纳米SiO2丙烯酸酯石蜡微胶囊相变材料热稳定性

Keywords

NanosilicaAcrylic esterParaffinMicrocapsule phase-change materialsThermal stability

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Related Institution

State Key Lab of Fire Science, University of Science and Technology of China

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