ICCAS OpenIR
Crystallization Behaviors of n-Octadecane in Confined Space: Crossover of Rotator Phase from Transient to Metastable Induced by Surface Freezing
Xie, Baoquan1,2; Liu, Guoming1,2; Jiang, Shichun3; Zhao, Ying1; Wang, Dujin1
2008-10-23
Source PublicationJOURNAL OF PHYSICAL CHEMISTRY B
ISSN1520-6106
Volume112Issue:42Pages:13310-13315
AbstractIn this paper, the confined crystallization and phase transition behaviors of n-octadecane in microcapsules with a diameter of about 3 Pm were studied with the combination of differential scanning calorimetry (DSC), temperature dependent Fourier transform infrared spectroscopy (FTIR), and X-ray diffraction (XRD). The main discovery is that the microencapsulated n-octadecane crystallizes into a stable triclinic phase via a mestastable rotator phase (RI), which emerges as a transient state for the bulk n-octadecane and is difficult to be detected by the commonly used characterization methods. As evident from the DSC measurement, a surface freezing monolayer, which is formed at the interface between the microcapsule inner wall and n-octadecane, induces the crossover of the R-1 from transient to metastable. We argue that the existence of the surface freezing monolayer decreases the nucleating potential barrier of the R, phase, and consequently the lower relative nucleation barrier in the confined geometry turns the transient R, phase into a metastable one.
DOI10.1021/jp712160k
Indexed BySCI
Language英语
WOS IDWOS:000260100900022
PublisherAMER CHEMICAL SOC
Citation statistics
Cited Times:48[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/64414
Collection中国科学院化学研究所
Corresponding AuthorWang, Dujin
Affiliation1.Chinese Acad Sci, Inst Chem, Joint Lab Polymer Sci & Mat, Key Lab Engn Plast,Beijing Natl Lab Mol Sci, 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
Xie, Baoquan,Liu, Guoming,Jiang, Shichun,et al. Crystallization Behaviors of n-Octadecane in Confined Space: Crossover of Rotator Phase from Transient to Metastable Induced by Surface Freezing[J]. JOURNAL OF PHYSICAL CHEMISTRY B,2008,112(42):13310-13315.
APA Xie, Baoquan,Liu, Guoming,Jiang, Shichun,Zhao, Ying,&Wang, Dujin.(2008).Crystallization Behaviors of n-Octadecane in Confined Space: Crossover of Rotator Phase from Transient to Metastable Induced by Surface Freezing.JOURNAL OF PHYSICAL CHEMISTRY B,112(42),13310-13315.
MLA Xie, Baoquan,et al."Crystallization Behaviors of n-Octadecane in Confined Space: Crossover of Rotator Phase from Transient to Metastable Induced by Surface Freezing".JOURNAL OF PHYSICAL CHEMISTRY B 112.42(2008):13310-13315.
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