Unusual Dewetting of Thin Polymer Films in Liquid Media Containing a Poor Solvent and a Nonsolvent
文献类型：期刊论文
| 作者 | Xu, Lin1; Sharma, Ashutosh2; Joo, Sang Woo1; Liu, Hui3,4; Shi, Tongfei3 |
| 刊名 | LANGMUIR
 |
| 出版日期 | 2014-12-16 |
| 卷号 | 30期号:49页码:14808-14816 |
| ISSN号 | 0743-7463 |
| DOI | 10.1021/la503319w |
| 英文摘要 | We investigate the control of pattern size and kinetics in spontaneous dewetting of thin polymer films (polystyrene) that are stable to thermal annealing by annealing in a poor solvent (acetone)/nonsolvent (ethanol or n-hexane) liquid mixture. Dewetting occurs by the formation and growth of circular holes that coalesce to form droplets. The influence of the nature and the volume fraction of the nonsolvents on the contact angle of polymer droplets, number density of holes, and the kinetics of holes formation and growth is studied. Addition of ethanol greatly increases the hole density and slows down the kinetics substantially, while affecting only a small change in wettability. n-Hexane addition shows an interesting nonmonotonic response in decreasing the hole density and contact angle in the volume fraction range of 0-0.3 but an opposite effect beyond that. Although the two nonsolvents chosen cannot by themselves induce dewetting, their relative affinity for the solid substrate vis-a-vis acetone can strongly influence the observed dewetting scenarios that are not understood by the existing theoretical considerations. n-Hexane, for example, has great affinity for silicon substrate. In addition to the changes in wettability, viscosity, and film interfacial tension engendered by the nonsolvents, the possibility of the formation of adsorbed liquid layers at the substrate-polymer interface, which can modify the interfacial friction and slippage, needs to be considered. |
| 语种 | 英语 |
| WOS记录号 | WOS:000346685100013 |
| 出版者 | AMER CHEMICAL SOC |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/50985]  |
| 专题 | 中国科学院化学研究所 |
| 通讯作者 | Sharma, Ashutosh |
| 作者单位 | 1.Yeungnam Univ, Sch Mech Engn, Gyongsan 712749, South Korea 2.Indian Inst Technol, Dept Chem Engn, Kanpur 208016, Uttar Pradesh, India 3.Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Changchun 130022, Peoples R China 4.Jilin Univ, Dept Phys, Changchun 130012, Peoples R China |
| 推荐引用方式 GB/T 7714 | Xu, Lin,Sharma, Ashutosh,Joo, Sang Woo,et al. Unusual Dewetting of Thin Polymer Films in Liquid Media Containing a Poor Solvent and a Nonsolvent[J]. LANGMUIR,2014,30(49):14808-14816. |
| APA | Xu, Lin,Sharma, Ashutosh,Joo, Sang Woo,Liu, Hui,&Shi, Tongfei.(2014).Unusual Dewetting of Thin Polymer Films in Liquid Media Containing a Poor Solvent and a Nonsolvent.LANGMUIR,30(49),14808-14816. |
| MLA | Xu, Lin,et al."Unusual Dewetting of Thin Polymer Films in Liquid Media Containing a Poor Solvent and a Nonsolvent".LANGMUIR 30.49(2014):14808-14816. |
入库方式： OAI收割
来源：化学研究所
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