Confined Crystallization of n-Hexadecane Located inside Microcapsules or outside Submicrometer Silica Nanospheres: A Comparison Study
文献类型：期刊论文
| 作者 | Fu, Dongsheng; Su, Yunlan; Gao, Xia; Liu, Yufeng; Wang, Dujin |
| 刊名 | JOURNAL OF PHYSICAL CHEMISTRY B
 |
| 出版日期 | 2013-05-23 |
| 卷号 | 117期号:20页码:6323-6329 |
| ISSN号 | 1520-6106 |
| DOI | 10.1021/jp4021849 |
| 英文摘要 | Crystallization and phase transition behaviors of n-hexadecane (n-C16H34, abbreviated as C-16) confined in microcapsules and n-alkane/SiO2 nanosphere composites have been investigated by the combination of differential scanning calorimetry (DSC) and temperature-dependent X-ray diffraction (XRD). As evident from the DSC measurement, the surface freezing phenomenon of C-16 is enhanced in both the microcapsules and SiO2 nanosphere composites because the surface-to-volume ratio is dramatically enlarged in both kinds of confinement. It is revealed from the XRD results that the novel solid solid phase transition is observed only in the rnicroencapsulated C-16, which crystallizes into a stable triclinic phase via a mestastable rotator phase (RI). For the C-16/SiO2 composite, however, no novel rotator phase emerges during the cooling process, and C-16 crystallizes into a stable triclinic phase directly from the liquid state. Heterogeneous nudeation induced by the surface freezing phase is dominant in the microencapsulated sample and contributes to the emergence of the novel rotator phase, whereas heterogeneous nucleation induced by foreign crystallization nuclei dominates the C-16/SiO2 composite, leading to phase transition behaviors similar to those of bulk C-16. |
| 语种 | 英语 |
| WOS记录号 | WOS:000319649900033 |
| 出版者 | AMER CHEMICAL SOC |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/46353]  |
| 专题 | 中国科学院化学研究所 |
| 通讯作者 | Su, Yunlan |
| 作者单位 | Chinese Acad Sci, Beijing Natl Lab Mol Sci, Key Lab Engn Plast, Inst Chem, Beijing 100190, Peoples R China |
| 推荐引用方式 GB/T 7714 | Fu, Dongsheng,Su, Yunlan,Gao, Xia,et al. Confined Crystallization of n-Hexadecane Located inside Microcapsules or outside Submicrometer Silica Nanospheres: A Comparison Study[J]. JOURNAL OF PHYSICAL CHEMISTRY B,2013,117(20):6323-6329. |
| APA | Fu, Dongsheng,Su, Yunlan,Gao, Xia,Liu, Yufeng,&Wang, Dujin.(2013).Confined Crystallization of n-Hexadecane Located inside Microcapsules or outside Submicrometer Silica Nanospheres: A Comparison Study.JOURNAL OF PHYSICAL CHEMISTRY B,117(20),6323-6329. |
| MLA | Fu, Dongsheng,et al."Confined Crystallization of n-Hexadecane Located inside Microcapsules or outside Submicrometer Silica Nanospheres: A Comparison Study".JOURNAL OF PHYSICAL CHEMISTRY B 117.20(2013):6323-6329. |
入库方式： OAI收割
来源：化学研究所
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