Heterogeneous nucleation uniformizing cell size distribution in microcellular nanocomposites foams
文献类型：期刊论文
| 作者 | Zhai, Wentao; Yu, Jian; Wu, Lichuan; Ma, Weiming; He, Jiasong |
| 刊名 | POLYMER
 |
| 出版日期 | 2006-10-04 |
| 卷号 | 47期号:21页码:7580-7589 |
| 关键词 | Microcellular Foam Heterogeneous Nucleation Polycarbonate |
| ISSN号 | 0032-3861 |
| DOI | 10.1016/j.polymer.2006.08.034 |
| 英文摘要 | Microcellular polycarbonate/nano-silica nanocomposites (PCSN) were prepared by temperature rising process using supercritical CO2 as the blowing agent. Neat PC foam showed a quite broad distribution of cell sizes. Under the same foaming conditions, the addition of nano-silica resulted in PCSN foams having uniform cell size distribution, reduced cell size of 0.3-0.5 mu m and increased cell density of 10(11)-10(13) cells/cm(3). The underlying nucleation mechanism was semi-quantitatively analyzed by the classical nucleation theory. The results indicate that the energy-barrier for heterogeneous nucleation was three orders of magnitude lower than that of homogeneous one. The heterogeneous nucleation of nano-silica aggregates dramatically increased the nucleation rate, decreased the nucleation time interval, and hence facilitated the almost instantaneous growth of cell size. Combined with the well-dispersed nucleation sites, resulted from the uniform dispersion of nano-silica aggregates, the narrow-distributed cell size was obtained in PCSN foams. (c) 2006 Elsevier Ltd. All rights reserved. |
| 语种 | 英语 |
| WOS记录号 | WOS:000241424800031 |
| 出版者 | ELSEVIER SCI LTD |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/57915]  |
| 专题 | 中国科学院化学研究所 |
| 通讯作者 | Yu, Jian |
| 作者单位 | 1.Chinese Acad Sci, Inst Chem, Joint Lab Polymer Sci & Mat, Key Lab Engn Plast,BNLMS, Beijing 100080, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhai, Wentao,Yu, Jian,Wu, Lichuan,et al. Heterogeneous nucleation uniformizing cell size distribution in microcellular nanocomposites foams[J]. POLYMER,2006,47(21):7580-7589. |
| APA | Zhai, Wentao,Yu, Jian,Wu, Lichuan,Ma, Weiming,&He, Jiasong.(2006).Heterogeneous nucleation uniformizing cell size distribution in microcellular nanocomposites foams.POLYMER,47(21),7580-7589. |
| MLA | Zhai, Wentao,et al."Heterogeneous nucleation uniformizing cell size distribution in microcellular nanocomposites foams".POLYMER 47.21(2006):7580-7589. |
入库方式： OAI收割
来源：化学研究所
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