Solid-Solid Phase Transition of n-Alkanes in Multiple Nanoscale Confinement

被引：31

作者：

Jiang, Kai ^{[1
,2
]}

Xie, Baoquan ^{[1
,2
]}

Fu, Dongsheng ^{[1
,2
]}

Luo, Faliang ^{[1
,2
]}

Liu, Guoming ^{[1
,2
]}

Su, Yunlan ^{[1
]}

Wang, Dujin ^{[1
]}

机构：

[1] Chinese Acad Sci, Beijing Natl Lab Mol Sci, Key Lab Engn Plast, Inst Chem, Beijing 100190, Peoples R China

[2] Chinese Acad Sci, Grad Sch, Beijing 100190, Peoples R China

来源：

JOURNAL OF PHYSICAL CHEMISTRY B | 2010年 / 114卷 / 03期

基金：

中国国家自然科学基金;

关键词：

THIN POLYMER-FILMS; MINIEMULSION DROPLETS; CRYSTALLIZATION BEHAVIORS; GEOMETRICAL CONFINEMENT; MELTING TEMPERATURE; ROTATOR PHASES; NANOCOMPOSITES; NUCLEATION; SURFACE; GROWTH;

D O I：

10.1021/jp9111475

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The crystallization behavior of n-C19H40/SiO2 nanosphere composites was investigated by a combination of differential scanning calorimetry (DSC) and temperature-dependent X-ray diffraction (XRD). Three kinds of confined alkalies with different Solid-solid phase transition supercoolings and a surface (or interface) freezing monolayer of n-C19H40 at the bulk liquid/SiO2 interface were Found in the composites at high SiO2 loading. The Surface freezing monolayer induces the chain packing or bulk alkalies by forming a 2D close-packed arrangement Without long-range positional ordering in 3D space. A homogeneous nucleation and growth mechanism is found for the solid-solid transition in confined geometry, in which the supercooling of the transition is sensitive to the confined size.

引用

页码：1388 / 1392

页数：5

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