Ultralight Silica Foams with a Hierarchical Pore Structure via a Surfactant-Free High Internal Phase Emulsion Process

doi:10.1021/acs.langmuir.8b02094

	Ultralight Silica Foams with a Hierarchical Pore Structure via a Surfactant-Free High Internal Phase Emulsion Process
	Tu, Shuhua 1; Zhao, Yongliang 2; Tan, Haotian 1; Yu, Heng 1; Zhu, Xiaomin 3; Wang, Haitao 1
刊名	Langmuir
	2018
卷号	34 期号:35 页码:10381-10388
ISSN号	07437463
DOI	10.1021/acs.langmuir.8b02094
英文摘要	An ultralight silica aerogel is among the most versatile materials available for technical applications; however, it remains a huge challenge to reduce its manufacturing cost. Here, we report on a simple approach for the preparation of silica foam monoliths with ultrahigh porosity up to 99.5% and specific surface area as high as 755 m2 g-1, which are similar to those of an aerogel. Our strategy is based on the effective stabilization of water-in-oil high internal phase emulsions by a hydrophobic silica precursor polymer, hyperbranched polyethoxysiloxane because of its hydrolysis-induced amphiphilicity. After conversion of this precursor polymer to silica, the emulsions are solidified without significant volume shrinkage. Thus, mechanically strong macroporous silica monoliths are obtained after removal of its liquid components. According to nitrogen sorption data, the resulting silica foams exhibit a high specific surface area and a foam skeleton consisting of both micropores ( © 2018 American Chemical Society.
出版者	American Chemical Society
内容类型	期刊论文
源URL	[http://ir.sic.ac.cn/handle/331005/25246]
专题	中国科学院上海硅酸盐研究所
作者单位	1.State Key Laboratory of Molecular Engineering of Polymers, Collaborative Innovation Center of Polymers and Polymer Composite Materials, Department of Macromolecular Science, Fudan University, Shanghai; 200433, China; 2.Shanghai Dilato Materials Co., Ltd, Shanghai; 200433, China; 3.DWI-Leibniz-Institute for Interactive Materials E.V., Institute for Technical and Macromolecular Chemistry, RWTH Aachen University, Aachen; 52056, Germany
推荐引用方式 GB/T 7714	Tu, Shuhua,Zhao, Yongliang,Tan, Haotian,et al. Ultralight Silica Foams with a Hierarchical Pore Structure via a Surfactant-Free High Internal Phase Emulsion Process[J]. Langmuir,2018,34(35):10381-10388.
APA	Tu, Shuhua,Zhao, Yongliang,Tan, Haotian,Yu, Heng,Zhu, Xiaomin,&Wang, Haitao.(2018).Ultralight Silica Foams with a Hierarchical Pore Structure via a Surfactant-Free High Internal Phase Emulsion Process.Langmuir,34(35),10381-10388.
MLA	Tu, Shuhua,et al."Ultralight Silica Foams with a Hierarchical Pore Structure via a Surfactant-Free High Internal Phase Emulsion Process".Langmuir 34.35(2018):10381-10388.