Confinement effect of SiO2 framework on phase change of PEG in shape-stabilized PEG/SiO2 composites

doi:10.1016/j.eurpolymj.2012.01.016

CORC > 化学研究所 > 中国科学院化学研究所

	Confinement effect of SiO2 framework on phase change of PEG in shape-stabilized PEG/SiO2 composites
	Yang, Huazhe 1,2; Feng, Lili 1,3; Wang, Chongyun 1; Zhao, Wei 1; Li, Xingguo 1
刊名	EUROPEAN POLYMER JOURNAL
	2012-04-01
卷号	48 期号:4 页码:803-810
关键词	Polyethylene Glycol Shape-stabilized Phase Change Materials Confinement Effect Peg/sio2 Composites
ISSN号	0014-3057
DOI	10.1016/j.eurpolymj.2012.01.016
英文摘要	PEG/SiO2 shape-stabilized phase change materials with various mass fractions and molecular weights of PEG were prepared by the sol-gel method. Polyethylene glycol (PEG) and tetraethyl orthosilicate (TEOS) were chosen as the phase change substance and the silica framework precursor, respectively. The as-prepared samples were characterized by X-ray diffraction (XRD), differential scanning calorimetry (DSC). Fourier transform infrared (FTIR) spectroscopy and scanning electron microscope (SEM) techniques. It is shown that the silica framework strongly confined the crystallization of PEG. The crystallinity and thermodynamic performance of the composites were undesirable for PEG with molecular weight of 1500 even when the PEG content reached 80 wt%. The crystallinity and thermodynamic performances of the PEG/SiO2 composites first decline then improve with the increase of the PEG molecular weights, owing to the different confinement behaviors of the silica framework. Finally, we investigated the phase change mechanism of the PEG/SiO2 composites under the different confinement of the silica framework. (C) 2012 Elsevier Ltd. All rights reserved.
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000302846700016
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/47363]
专题	中国科学院化学研究所
通讯作者	Li, Xingguo
作者单位	1.Peking Univ, Coll Chem & Mol Engn, State Key Lab Rare Earth Mat Chem & Applicat, Beijing Natl Lab Mol Sci, Beijing 100871, Peoples R China 2.China Med Univ, Coll Basic Med Sci, Dept Biophys, Shenyang 110001, Liaoning, Peoples R China 3.Beijing Univ Civil Engn & Architecture, Key Lab Urban Stormwater Syst & Water Environm, Minist Educ, Beijing 100044, Peoples R China
推荐引用方式 GB/T 7714	Yang, Huazhe,Feng, Lili,Wang, Chongyun,et al. Confinement effect of SiO2 framework on phase change of PEG in shape-stabilized PEG/SiO2 composites[J]. EUROPEAN POLYMER JOURNAL,2012,48(4):803-810.
APA	Yang, Huazhe,Feng, Lili,Wang, Chongyun,Zhao, Wei,&Li, Xingguo.(2012).Confinement effect of SiO2 framework on phase change of PEG in shape-stabilized PEG/SiO2 composites.EUROPEAN POLYMER JOURNAL,48(4),803-810.
MLA	Yang, Huazhe,et al."Confinement effect of SiO2 framework on phase change of PEG in shape-stabilized PEG/SiO2 composites".EUROPEAN POLYMER JOURNAL 48.4(2012):803-810.