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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Naturally Hydrophobic Foams from Lignocellulosic Fibers Prepared by Oven-Drying

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Author(s):
Ferreira, Elisa S. [1, 2] ; Cranston, Emily D. [2, 3, 4] ; Rezende, Camila A. [1]
Total Authors: 3
Affiliation:
[1] Univ Estadual Campinas, Inst Chem, BR-13083970 Campinas, SP - Brazil
[2] McMaster Univ, Dept Chem Engn, Hamilton, ON L8S 4L7 - Canada
[3] Univ British Columbia, Dept Wood Sci, Vancouver, BC V6T 1Z4 - Canada
[4] Univ British Columbia, Dept Chem & Biol Engn, Vancouver, BC V6T 1Z4 - Canada
Total Affiliations: 4
Document type: Journal article
Source: ACS SUSTAINABLE CHEMISTRY & ENGINEERING; v. 8, n. 22, p. 8267-8278, JUN 8 2020.
Web of Science Citations: 0
Abstract

Lignocellulosic sugarcane biomass underwent an very low apparent density (0.09 g/cm(3)) were easily obtained by alkaline treatment for partial lignin extraction and then foams with oven-drying aqueous dispersions of fibers. The fiber networks were covalently reinforced through cross-linking by heating the dried material in the presence of citric acid. The lignocellulosic foams were naturally hydrophobic (water contact angle = 117 degrees), without requiring any further chemical modification. The hydrophobicity is attributed to the combination of (1) residual lignin, (2) redeposited lignin that has undergone thermal treatment, (3) the fiber and foam surface roughness, and (4) the structure's ability to trap air. The cross-linked fiber networks showed shape-recovery properties under compressive stress, high absorption capacity, and mechanical resistance when immersed in water and oil. This work demonstrates that lignocellulosic foams from sugarcane bagasse, processed following low cost and green methods, are promising for selective removal of hydrophobic compounds in aqueous environments and in a range of insulating and packaging products. (AU)

FAPESP's process: 16/13602-7 - Study on strategies to allow the integral use of lignocellulosic biomass
Grantee:Camila Alves de Rezende
Support Opportunities: Program for Research on Bioenergy (BIOEN) - Regular Program Grants
FAPESP's process: 18/23769-1 - Preparation and applications of nanostructures from plant biomass
Grantee:Camila Alves de Rezende
Support Opportunities: Regular Research Grants