Skip to main content

Research Repository

Advanced Search

Thermal conductivity, structure and mechanical properties of konjac glucomannan/starch based aerogel strengthened by wheat straw

Wang, Yixin; Wu, Kao; Xiao, Man; Riffat, Saffa B.; Su, Yuehong; Jiang, Fatang

Thermal conductivity, structure and mechanical properties of konjac glucomannan/starch based aerogel strengthened by wheat straw Thumbnail


Authors

Yixin Wang

Kao Wu

Man Xiao

SAFFA RIFFAT saffa.riffat@nottingham.ac.uk
Professor of Sustainable Energy Systems

YUEHONG SU YUEHONG.SU@NOTTINGHAM.AC.UK
Professor of Thermal Science and Building Technology

Fatang Jiang



Abstract

This study presents the preparation and property characterization of a konjac glucomannan (KGM)/starch based aerogel as a thermal insulation material. Wheat straw powders (a kind of agricultural waste) and starch are used to enhance aerogel physical properties such as mechanical strength and pore size distribution. Aerogel samples were made using environmentally friendly sol–gel and freeze drying methods. Results show that starch addition could strengthen the mechanical strength of aerogel significantly, and wheat straw addition could decrease aerogel pore size due to its special micron-cavity structure, with appropriate gelatin addition as the stabilizer. The aerogel formula was optimized to achieve lowest thermal conductivity and good thermal stability. Within the experimental range, aerogel with the optimized formula had a thermal conductivity 0.04641 Wm−1 K−1, a compression modulus 67.5 kPa and an elasticity 0.27. The results demonstrate the high potential of KGM/starch based aerogels enhanced with wheat straw for application in thermal insulation.

Citation

Wang, Y., Wu, K., Xiao, M., Riffat, S. B., Su, Y., & Jiang, F. (2018). Thermal conductivity, structure and mechanical properties of konjac glucomannan/starch based aerogel strengthened by wheat straw. Carbohydrate Polymers, 197, 284-291. https://doi.org/10.1016/j.carbpol.2018.06.009

Journal Article Type Article
Acceptance Date Jun 2, 2018
Online Publication Date Jun 4, 2018
Publication Date Oct 1, 2018
Deposit Date Jan 4, 2019
Publicly Available Date Jun 5, 2019
Journal Carbohydrate Polymers
Print ISSN 0144-8617
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 197
Pages 284-291
DOI https://doi.org/10.1016/j.carbpol.2018.06.009
Public URL https://nottingham-repository.worktribe.com/output/1221090
Publisher URL https://www.sciencedirect.com/science/article/pii/S0144861718306568?via%3Dihub

Files




You might also like



Downloadable Citations