Sound absorption, structure and mechanical behavior of konjac glucomannan-based aerogels with addition of gelatin and wheat straw

Wang, Yixin; Zhu, Hui; Tu, Wenyao; Su, Yuehong; Jiang, Fatang; Riffat, Saffa

Abstract

Environment-friendly konjac glucomannan (KGM)-based aerogels with addition of gelatin and wheat straw are produced by freeze-drying method to have promising sound absorption performance, thermal stability and mechanical property. Results show that gelatin addition can significantly improve sound absorption performance at medium and high frequencies, as well as mechanical strength, because of the positive effect on increase of small open pores. Appropriate little addition of wheat straw can improve the sound absorption property due to the dissipation effect of sound energy by the unique multi-cavity structure. Better sound absorption performance is achieved than melamine foam, while the best result is obtained with a noise reduction coefficient of 0.38, and the coefficient reaches 0.88 at 4500 Hz. Wheat straw addition leads to strength reduction firstly but enhancement when the addition is more than 1.00%, where fine wheat straw bars form nest structures for strengthening. For potential loading capacity evaluation, a mechanical model is proposed and confirmed to be effective in predicting compressive stress – strain relationship of KGM-based aerogels with consideration of gelatin and wheat straw addition.

Citation

Wang, Y., Zhu, H., Tu, W., Su, Y., Jiang, F., & Riffat, S. (2022). Sound absorption, structure and mechanical behavior of konjac glucomannan-based aerogels with addition of gelatin and wheat straw. Construction and Building Materials, 352, Article 129052. https://doi.org/10.1016/j.conbuildmat.2022.129052

• Journal Article Type: Article
• Acceptance Date: Sep 1, 2022
• Online Publication Date: Sep 11, 2022
• Publication Date: Oct 17, 2022
• Deposit Date: Sep 14, 2022
• Publicly Available Date: Sep 14, 2022
• Journal: Construction and Building Materials
• Print ISSN: 0950-0618
• Electronic ISSN: 1879-0526
• Publisher: Elsevier
• Peer Reviewed: Peer Reviewed
• Volume: 352
• Article Number: 129052
• DOI: https://doi.org/10.1016/j.conbuildmat.2022.129052
• Keywords: General Materials Science; Building and Construction; Civil and Structural Engineering
• Public URL: https://nottingham-repository.worktribe.com/output/11195265
• Publisher URL: https://www.sciencedirect.com/science/article/pii/S0950061822027076?via%3Dihub
• Additional Information: This article is maintained by: Elsevier; Article Title: Sound absorption, structure and mechanical behavior of konjac glucomannan-based aerogels with addition of gelatin and wheat straw; Journal Title: Construction and Building Materials; CrossRef DOI link to publisher maintained version: https://doi.org/10.1016/j.conbuildmat.2022.129052; Content Type: article; Copyright: © 2022 The Author(s). Published by Elsevier Ltd.