ICCAS OpenIR
Effect of Geometrical Confinement on the Nucleation and Crystallization Behavior of n-Alkane Mixtures
Jiang, Kai1,2; Su, Yunlan1; Xie, Baoquan1,2; Jiang, Shichun3; Zhao, Ying1; Wang, Dujin1
2008-12-25
Source PublicationJOURNAL OF PHYSICAL CHEMISTRY B
ISSN1520-6106
Volume112Issue:51Pages:16485-16489
AbstractThe condensed structure of normal alkane (n-alkane) mixtures in confined geometry is an interesting topic concerning the difference in crystallization behavior of odd and even alkanes. In the present work, the crystallization of mixtures of normal octadecane (n-C(18)H(38)) and normal nonadecane (n-C(19)H(40)) in microcapsules with narrow size distribution was investigated using the combination of differential scanning calorimetry (DSC) and X-ray diffraction (XRD). A surface freezing monolayer for microencapsulated n-C(18)H(38), n-C(19)H(40), and their mixture was detected by DSC, which for the mixture is a mixed homogeneous crystalline phase with continuous change in the composition. A more stable rotator phase (RI) was observed for the microencapsulated n-C(18)H(38)/n-C(19)H(40) = 95/5 (molar ratio) mixture, confirmed by an increased supercooling of the transition from RI to stable phase compared to that of the mixture in bulk, Two nucleation mechanisms were speculated as "liquid-to-solid" heterogeneous nucleation and "solid-to-solid" homogeneous nucleation, which occur at different crystallization stages in microcapsules and might be attributed to the surface effect and confinement effect, respectively, in the confined geometry.
DOI10.1021/jp807347d
Indexed BySCI
Language英语
WOS IDWOS:000261835100031
PublisherAMER CHEMICAL SOC
Citation statistics
Cited Times:28[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/64088
Collection中国科学院化学研究所
Corresponding AuthorWang, Dujin
Affiliation1.Chinese Acad Sci, Inst Chem, Beijing Natl Lab Mol Sci, Key Lab Engn Plast,Joint Lab Polymer Sci & Mat, Beijing 100190, Peoples R China
2.Chinese Acad Sci, Grad Sch, Beijing 100190, Peoples R China
3.Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Changchun 130022, Peoples R China
Recommended Citation
GB/T 7714
Jiang, Kai,Su, Yunlan,Xie, Baoquan,et al. Effect of Geometrical Confinement on the Nucleation and Crystallization Behavior of n-Alkane Mixtures[J]. JOURNAL OF PHYSICAL CHEMISTRY B,2008,112(51):16485-16489.
APA Jiang, Kai,Su, Yunlan,Xie, Baoquan,Jiang, Shichun,Zhao, Ying,&Wang, Dujin.(2008).Effect of Geometrical Confinement on the Nucleation and Crystallization Behavior of n-Alkane Mixtures.JOURNAL OF PHYSICAL CHEMISTRY B,112(51),16485-16489.
MLA Jiang, Kai,et al."Effect of Geometrical Confinement on the Nucleation and Crystallization Behavior of n-Alkane Mixtures".JOURNAL OF PHYSICAL CHEMISTRY B 112.51(2008):16485-16489.
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