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Fabrication and Properties of Hybrid Coffee-Cellulose Aerogels from Spent Coffee Grounds

A fully biodegradable hybrid coffee-cotton aerogel has been successfully developed from spent coffee grounds, 100% cotton fiber and polyvinyl alcohol (PVA) flakes via environmental friendly processes. The cotton fibers in coffee aerogel help to maintain the structure and improve the overall properti...

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Autores principales: Zhang, Xiwen, Kwek, Li Ping, Le, Duyen K., Tan, Men Shu, Duong, Hai Minh
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6960835/
https://www.ncbi.nlm.nih.gov/pubmed/31779069
http://dx.doi.org/10.3390/polym11121942
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author Zhang, Xiwen
Kwek, Li Ping
Le, Duyen K.
Tan, Men Shu
Duong, Hai Minh
author_facet Zhang, Xiwen
Kwek, Li Ping
Le, Duyen K.
Tan, Men Shu
Duong, Hai Minh
author_sort Zhang, Xiwen
collection PubMed
description A fully biodegradable hybrid coffee-cotton aerogel has been successfully developed from spent coffee grounds, 100% cotton fiber and polyvinyl alcohol (PVA) flakes via environmental friendly processes. The cotton fibers in coffee aerogel help to maintain the structure and improve the overall properties of the new hybrid coffee-cotton aerogel. The results show that increasing the concentration of fibers, while keeping the concentration of spent coffee grounds constant, the sinking of coffee ground particles in solution and shrinking effect on the aerogels are minimized and the overall mechanical and oil absorption properties are improved. The developed hybrid aerogels possess high porosity of 92–95% and super-hydrophobicity with an average water contact angle of 139°. Oil absorption capacity achieves 16 g/g with 0.50 wt.% of cotton fibers inside the coffee aerogel. Their thermal conductivity is in the range of 0.037–0.045 W/mK and compressive Young’s modulus achieves highest at 15.6 kPa. The properties of the hybrid aerogel indicate it as a potential material in several applications such as thermal insulation, oil absorption and filtration.
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spelling pubmed-69608352020-01-24 Fabrication and Properties of Hybrid Coffee-Cellulose Aerogels from Spent Coffee Grounds Zhang, Xiwen Kwek, Li Ping Le, Duyen K. Tan, Men Shu Duong, Hai Minh Polymers (Basel) Article A fully biodegradable hybrid coffee-cotton aerogel has been successfully developed from spent coffee grounds, 100% cotton fiber and polyvinyl alcohol (PVA) flakes via environmental friendly processes. The cotton fibers in coffee aerogel help to maintain the structure and improve the overall properties of the new hybrid coffee-cotton aerogel. The results show that increasing the concentration of fibers, while keeping the concentration of spent coffee grounds constant, the sinking of coffee ground particles in solution and shrinking effect on the aerogels are minimized and the overall mechanical and oil absorption properties are improved. The developed hybrid aerogels possess high porosity of 92–95% and super-hydrophobicity with an average water contact angle of 139°. Oil absorption capacity achieves 16 g/g with 0.50 wt.% of cotton fibers inside the coffee aerogel. Their thermal conductivity is in the range of 0.037–0.045 W/mK and compressive Young’s modulus achieves highest at 15.6 kPa. The properties of the hybrid aerogel indicate it as a potential material in several applications such as thermal insulation, oil absorption and filtration. MDPI 2019-11-26 /pmc/articles/PMC6960835/ /pubmed/31779069 http://dx.doi.org/10.3390/polym11121942 Text en © 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Zhang, Xiwen
Kwek, Li Ping
Le, Duyen K.
Tan, Men Shu
Duong, Hai Minh
Fabrication and Properties of Hybrid Coffee-Cellulose Aerogels from Spent Coffee Grounds
title Fabrication and Properties of Hybrid Coffee-Cellulose Aerogels from Spent Coffee Grounds
title_full Fabrication and Properties of Hybrid Coffee-Cellulose Aerogels from Spent Coffee Grounds
title_fullStr Fabrication and Properties of Hybrid Coffee-Cellulose Aerogels from Spent Coffee Grounds
title_full_unstemmed Fabrication and Properties of Hybrid Coffee-Cellulose Aerogels from Spent Coffee Grounds
title_short Fabrication and Properties of Hybrid Coffee-Cellulose Aerogels from Spent Coffee Grounds
title_sort fabrication and properties of hybrid coffee-cellulose aerogels from spent coffee grounds
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6960835/
https://www.ncbi.nlm.nih.gov/pubmed/31779069
http://dx.doi.org/10.3390/polym11121942
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