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
收藏
页码：1388 / 1392
页数：5
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