Hydrophobization of Silica Nanoparticles in Water: Nanostructure and Response to Drying Stress
文献类型：期刊论文
| 作者 | Moro, Solenn1; Parneix, Caroline2; Cabane, Bernard1; Sanson, Nicolas1; d'Espinose de Lacaillerie, Jean-Baptiste1 |
| 刊名 | Langmuir : the ACS journal of surfaces and colloids
 |
| 出版日期 | 2017-05-16 |
| 卷号 | 33期号:19页码:4709-4719 |
| ISSN号 | 1520-5827 |
| DOI | 10.1021/acs.langmuir.6b04505 |
| 文献子类 | Article |
| 英文摘要 | We report on the impact of surface hydrophobization on the structure of aqueous silica dispersions and how this structure resists drying stress. Hydrophilic silica particles were hydrophobized directly in water using a range of organosilane precursors, with a precise control of the grafting density. The resulting nanostructure was precisely analyzed by a combination of small-angle X-ray scattering (SAXS) and cryo-microscopy (cryo-TEM). Then, the dispersion was progressively concentrated by drying, and the evolution of the nanostructures as a function of the grafting density was followed by SAXS. At the fundamental level, because the hydrophobic character of the silica surfaces could be varied continuously through a precise control of the grafting density, we were able to observe how the hydrophobic interactions change particles interactions and aggregates structures. Practically, this opened a new route to tailor the final structure, the residual porosity, and the damp-proof properties of the fully dried silica. For example, regardless of the nature of the hydrophobic precursor, a grafting density of 1 grafter per nm optimized the interparticle interactions in solution in view to maximize the residual porosity in the dried material (0.9 cm/g) and reduced the water uptake to less than 4% in weight compared to the typical value of 13% for hydrophilic particles (at T = 25 °C and relative humidity = 80%). |
| 语种 | 英语 |
| 源URL | [http://119.78.100.183/handle/2S10ELR8/266735]  |
| 专题 | 中国科学院上海药物研究所 |
| 作者单位 | 1.ESPCI Paris, CNRS UMR 7615 and UMR 8231, PSL Research University , 10 rue Vauquelin, F-75231 Paris, Cedex 05, France; 2.Saint-Gobain Recherche, 39 Quai Lucien Lefranc, 93303 Aubervilliers, Cedex, France |
| 推荐引用方式 GB/T 7714 | Moro, Solenn,Parneix, Caroline,Cabane, Bernard,et al. Hydrophobization of Silica Nanoparticles in Water: Nanostructure and Response to Drying Stress[J]. Langmuir : the ACS journal of surfaces and colloids,2017,33(19):4709-4719. |
| APA | Moro, Solenn,Parneix, Caroline,Cabane, Bernard,Sanson, Nicolas,&d'Espinose de Lacaillerie, Jean-Baptiste.(2017).Hydrophobization of Silica Nanoparticles in Water: Nanostructure and Response to Drying Stress.Langmuir : the ACS journal of surfaces and colloids,33(19),4709-4719. |
| MLA | Moro, Solenn,et al."Hydrophobization of Silica Nanoparticles in Water: Nanostructure and Response to Drying Stress".Langmuir : the ACS journal of surfaces and colloids 33.19(2017):4709-4719. |
入库方式： OAI收割
来源：上海药物研究所
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