Preparation, thermal and flammability properties of a novel form-stable phase change materials based on high density polyethylene/poly(ethylene-co-vinyl acetate)/organophilic montmorillonite nanocomposites/paraffin compounds

被引：71

作者：

Cai, Yibing ^{[1
,2
]}

Song, Lei ^{[1
]}

He, Qingliang ^{[1
]}

Yang, Dandan ^{[1
]}

Hu, Yuan ^{[1
]}

机构：

[1] Univ Sci & Technol China, State Key Lab Fire Sci, Hefei 230027, Ahui, Peoples R China

[2] Jiangnan Univ, Minist Educ, Key Lab Ecotext, Jiangsu 214122, Peoples R China

来源：

ENERGY CONVERSION AND MANAGEMENT | 2008年 / 49卷 / 08期

基金：

中国国家自然科学基金; 高等学校博士学科点专项科研基金;

关键词：

phase change materials (PCM); organophilic montmorillonite (OMT); thermal stability; latent heat; flammability;

D O I：

10.1016/j.enconman.2008.02.013

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The paraffin is one of important thermal energy storage materials with many desirable characteristics (i.e., high heat of fusion, varied phase change temperature, negligible supercooling, self-nucleating, no phase segregation and cheap, etc.), but has low thermal stability and flammable. Hence, a novel form-stable phase change materials (PCM) based on high density polyethylene (HDPE)/poly(ethylene-co-vinyl acetate) (EVA)Jorganophilic montmorillonite (OMT) nanocomposites and paraffin are prepared by twin-screw extruder technique. The structures of the HDPE-EVA/OMT nanocomposites and the form-stable PCM are evidenced by the X-ray diffraction (XRD), transmission electronic microscopy (TEM) and scanning electronic microscope (SEM). The results of XRD and TEM show that the HDPE-EVA/OMT nanocomposites form the ordered intercalated nanomorphology. The form-stable PCM consists of the paraffin, which acts as a dispersed phase change material and the HDPE-EVA/OMT nanocomposites, which acts as the supporting material. The paraffin disperses in the three-dimensional net structure formed by HDPE-EVA/OMT nanocomposites. The thermal stability, latent heat and flammability properties aire characterized by thermogravimetry analysis (TGA), dynamic Fourier-transform infrared (FTIR), differential scanning calorimeter (DSC) and cone calorimeter, respectively. The TGA and dynamic FTIR analyses indicate that the incorporation of suitable amount of OMT into the form-stable PCM increase the thermal stability. The DSC results show that the latent heat of the form-stable PCM has a certain degree decrease. The cone calorimeter shows that the heat release rate (HRR) has remarkably decreases with loading of OMT in the form-stable PCM, contributing to the improved flammability properties. (c) 2008 Elsevier Ltd. All rights reserved.

引用

页码：2055 / 2062

页数：8

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