Nanoparticle Enlarged Interfacial Effect on Phase Transition of 1-Octadecanol/Silica Composites

doi:10.1021/jp512124s

CORC > 化学研究所 > 中国科学院化学研究所

	Nanoparticle Enlarged Interfacial Effect on Phase Transition of 1-Octadecanol/Silica Composites
	Gao, Xia; Xie, Baoquan; Su, Yunlan; Fu, Dongsheng; Wang, Dujin
刊名	JOURNAL OF PHYSICAL CHEMISTRY B
	2015-02-05
卷号	119 期号:5 页码:2074-2080
ISSN号	1520-6106
DOI	10.1021/jp512124s
英文摘要	Motivated by the interest in an interfacial effect on crystallization behaviors and material properties of polymer nanocomposites, phase behaviors of a novel model system for polymer nanocomposite, 1-octadecanol/silica nanosphere composites (C18OH/SiO2), were studied by means of thermal analysis and wide-angle X-ray diffraction. Although a huge specific surface area of silica nanoparticles enlarges the surfacevolume ratio of C18OH molecules, surface freezing phenomenon is not observed by DSC in the C18OH/SiO2 composites. While pure C18OH exhibits rotator RIV phase with molecules tilted with respect to the layer normal, the silica network favors and enhances untitled RII phase by disturbing the layering arrangement. Moreover, the confined C18OH shows a polycrystalline mixture of orthorhombic beta form and monoclinic gamma form. It is demonstrated that the interfacial interaction between the C18OH molecules and the silica surface contributes to the peculiar phase transition behaviors of C18OH/SiO2 composites. The investigation of the model system of long-chain alcohol/nano-SiO2 composites may help us to understand the complicated interfacial effect on phase behaviors and material properties of polymer nanocomposite systems.
语种	英语
出版者	AMER CHEMICAL SOC
WOS记录号	WOS:000349137000030
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/53313]
专题	中国科学院化学研究所
通讯作者	Su, Yunlan
作者单位	Chinese Acad Sci, Inst Chem, Key Lab Engn Plast, Beijing Natl Lab Mol Sci, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Gao, Xia,Xie, Baoquan,Su, Yunlan,et al. Nanoparticle Enlarged Interfacial Effect on Phase Transition of 1-Octadecanol/Silica Composites[J]. JOURNAL OF PHYSICAL CHEMISTRY B,2015,119(5):2074-2080.
APA	Gao, Xia,Xie, Baoquan,Su, Yunlan,Fu, Dongsheng,&Wang, Dujin.(2015).Nanoparticle Enlarged Interfacial Effect on Phase Transition of 1-Octadecanol/Silica Composites.JOURNAL OF PHYSICAL CHEMISTRY B,119(5),2074-2080.
MLA	Gao, Xia,et al."Nanoparticle Enlarged Interfacial Effect on Phase Transition of 1-Octadecanol/Silica Composites".JOURNAL OF PHYSICAL CHEMISTRY B 119.5(2015):2074-2080.