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Crystallization Behavior of Binary Even-Even n-Alkane Mixtures in Microcapsules: Effect of Composition and Confined Geometry on Solid-Solid phase Separation
Fu, Dongsheng1,2; Liu, Yufeng1; Su, Yunlan1; Liu, Guoming1,2; Wang, Dujin1
2011-04-28
Source PublicationJOURNAL OF PHYSICAL CHEMISTRY B
ISSN1520-6106
Volume115Issue:16Pages:4632-4638
AbstractThe crystallization behaviors of binary even-even normal alkane (n-alkane) mixtures (n-C(18)H(38)/n-C(20)H(42) abbreviated as C(18)/C(20)) with different Compositions, both in the bulk state and in nearly monodisperse microcapsules, have been investigated by the combination of differential scanning calorimetry and temperature-dependent) X-ray diffraction. The solid-solid phase separation, usually observed during the cooling process of bulk samples, is greatly suppressed and even eliminated after being microencapsulated, with the orthorhombic-ordered phase dominating in the low-temperature crystal. Such a crystallization transition is attributed to the special interaction between the two even n-alkanes and the confined environment in microcapsules. The triclinic ordered phase, solely formed by the single even n-alkanes (C(18) or C(20)), becomes less stable due to the weakening of the layered structure and the suppression of the terminal methyl methyl interactions in the confined geometry, which favors the miscibility of the two components. Furthermore, besides the chain-length difference and the composition, the confined environment is proved to be another important factor to exert strong positive influence on suppressing the solid solid phase separation of C(18)/C(20) binary System.
DOI10.1021/jp2004248
Indexed BySCI
Language英语
WOS IDWOS:000289697300009
PublisherAMER CHEMICAL SOC
Citation statistics
Cited Times:24[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/73682
Collection中国科学院化学研究所
Corresponding AuthorSu, Yunlan
Affiliation1.Chinese Acad Sci, Beijing Natl Lab Mol Sci, Key Lab Engn Plast, Inst Chem, Beijing 100190, Peoples R China
2.Chinese Acad Sci, Grad Univ, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Fu, Dongsheng,Liu, Yufeng,Su, Yunlan,et al. Crystallization Behavior of Binary Even-Even n-Alkane Mixtures in Microcapsules: Effect of Composition and Confined Geometry on Solid-Solid phase Separation[J]. JOURNAL OF PHYSICAL CHEMISTRY B,2011,115(16):4632-4638.
APA Fu, Dongsheng,Liu, Yufeng,Su, Yunlan,Liu, Guoming,&Wang, Dujin.(2011).Crystallization Behavior of Binary Even-Even n-Alkane Mixtures in Microcapsules: Effect of Composition and Confined Geometry on Solid-Solid phase Separation.JOURNAL OF PHYSICAL CHEMISTRY B,115(16),4632-4638.
MLA Fu, Dongsheng,et al."Crystallization Behavior of Binary Even-Even n-Alkane Mixtures in Microcapsules: Effect of Composition and Confined Geometry on Solid-Solid phase Separation".JOURNAL OF PHYSICAL CHEMISTRY B 115.16(2011):4632-4638.
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