Improved mechanical and thermal insulation properties of monolithic attapulgite nanofiber/silica aerogel composites dried at ambient pressure

CORC > 宁波材料技术与工程研究所 > 中国科学院宁波材料技术与工程研究所 > 2017专题

	Improved mechanical and thermal insulation properties of monolithic attapulgite nanofiber/silica aerogel composites dried at ambient pressure
	Li, Jie; Lei, Yu; Liu, Fenghua; Xu, Dingding; Li, Junwan; Sun, Aihua; Guo, Jianjun; Xu, Gaojie
刊名	JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
	2017
卷号	82 期号:3 页码:702-711
ISSN号	0928-0707
英文摘要	To overcome the brittleness and the dry shrinkage of silica aerogels, natural attapulgite nanofiber is successfully used as reinforcement for monolithic silica aerogel composites possessing ultralow density and excellent thermal insulation properties. The attapulgite/silica aerogel composites are obtained by dispersing the acid-treated attapulgite fibers in silica sol, followed by aging and ambient pressure drying. The acid treatment of attapulgite fibers obviously improved the adhesion between silica aerogel and attapulgite fibers surface. The microstructure analysis showed that silica particles firmly adhered to the surface of the rod shaped crystal of attapulgite fibers, which played a supporting role as structure skeleton and substantially improved the integrity and mechanical strength of the aerogel composites. No obvious variation of the mesoporous silica structure was observed since the nanosized attapulgite fibers are effectively incorporated into the network, instead of separated into small fragments as pure aerogel shown. As the fiber content increased, the density decreased to 0.163 cm(3)/g first and then increased, while the thermal conductivity increased slightly with ranging between 0.0198 and 0.0228 W m(-1) K-1. The aerogel samples with compression strength varying from 0.8 to 2.5 MPa were obtained. All these promising characteristics indicated that ATP/silica aerogel composites have diverse applications, especially in heat preservation field.
公开日期	2017-12-25
内容类型	期刊论文
源URL	[http://ir.nimte.ac.cn/handle/174433/13815]
专题	2017专题
推荐引用方式 GB/T 7714	Li, Jie,Lei, Yu,Liu, Fenghua,et al. Improved mechanical and thermal insulation properties of monolithic attapulgite nanofiber/silica aerogel composites dried at ambient pressure[J]. JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY,2017,82(3):702-711.
APA	Li, Jie.,Lei, Yu.,Liu, Fenghua.,Xu, Dingding.,Li, Junwan.,...&Xu, Gaojie.(2017).Improved mechanical and thermal insulation properties of monolithic attapulgite nanofiber/silica aerogel composites dried at ambient pressure.JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY,82(3),702-711.
MLA	Li, Jie,et al."Improved mechanical and thermal insulation properties of monolithic attapulgite nanofiber/silica aerogel composites dried at ambient pressure".JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY 82.3(2017):702-711.