Time scales for drainage and imbibition in gellified foams: application to decontamination processes
文献类型：期刊论文
| 作者 | Deleurence, Rémi; Saison, Tamar; Lequeux, François; Monteux, Cécile |
| 刊名 | Soft matter
 |
| 出版日期 | 2015-09-21 |
| 卷号 | 11期号:35页码:7032-7 |
| ISSN号 | 1744-6848 |
| DOI | 10.1039/c5sm01158b |
| 文献子类 | Article |
| 英文摘要 | We probe the drainage and imbibition dynamics of foams in which the continuous aqueous phase is a transient gel-like network. To produce these foams, we provide a new method - a PVA (polyvinyl alcohol) solution is first foamed and then a cross-linker, Borax, is added, which binds reversibly to the PVA chains. The resulting foams are ultra-stable-over a month. We find that the typical time for gravitational drainage of the continuous phase can be slowed down from hours to several weeks by tuning the Borax concentration. We show that the Borax concentration controls both the bulk viscosity of the continuous phase and the surface viscosity of the air-water interfaces. From these results we suggest that the PVA molecules adsorbed at the bubble interfaces are highly cross-linked by the Borax molecules. We find that the capillary rise of a dyed liquid into these foams is orders of magnitude faster than the drainage flow, meaning that these foams can quickly absorb liquids. These results show that these foams could be used to clean or decontaminate surfaces covered with liquid wastes. Indeed we show that the PVA-Borax foam can easily be spread on a surface, absorb a liquid without destabilizing and be dried afterward to recover the waste. |
| 语种 | 英语 |
| 源URL | [http://119.78.100.183/handle/2S10ELR8/266730]  |
| 专题 | 中国科学院上海药物研究所 |
| 通讯作者 | Deleurence, Rémi |
| 作者单位 | École Supérieure de Physique et de Chimie Industrielles de la Ville de Paris (ESPCI), ParisTech, PSL Research University, Sciences et Ingénierie de la Matière Molle (SIMM), CNRS UMR 7615, 10 rue Vauquelin, F-75231 Paris cedex 05, France. cecile |
| 推荐引用方式 GB/T 7714 | Deleurence, Rémi,Saison, Tamar,Lequeux, François,et al. Time scales for drainage and imbibition in gellified foams: application to decontamination processes[J]. Soft matter,2015,11(35):7032-7. |
| APA | Deleurence, Rémi,Saison, Tamar,Lequeux, François,&Monteux, Cécile.(2015).Time scales for drainage and imbibition in gellified foams: application to decontamination processes.Soft matter,11(35),7032-7. |
| MLA | Deleurence, Rémi,et al."Time scales for drainage and imbibition in gellified foams: application to decontamination processes".Soft matter 11.35(2015):7032-7. |
入库方式： OAI收割
来源：上海药物研究所
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