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Insight into the Effects of Solvent Treatment of Natural Fibers Prior to Structural Composite Casting: Chemical, Physical and Mechanical Evaluation

Fibers, 2021-09, Vol.9 (9), p.54 [Peer Reviewed Journal]

2021 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 (https://creativecommons.org/licenses/by/4.0/). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License. ;ISSN: 2079-6439 ;EISSN: 2079-6439 ;DOI: 10.3390/fib9090054

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Title:
Insight into the Effects of Solvent Treatment of Natural Fibers Prior to Structural Composite Casting: Chemical, Physical and Mechanical Evaluation
Author: Abbass, Ali ; Paiva, Maria C. ; Oliveira, Daniel V. ; Lourenço, Paulo B. ; Fangueiro, Raul
Subjects: built heritage ; Cellulose ; Composite materials ; Contact angle ; Crystalline cellulose ; Elongation ; Employment ; Ethanol ; Fiber-matrix interfaces ; Fibers ; Flax ; FTIR ; Hemp ; Hexanes ; Historical structures ; Interfacial strength ; Laboratories ; Lignin ; Low molecular weights ; masonry ; Mechanical properties ; natural fibers ; NTRM ; Physical properties ; Sisal ; Solvents ; Spectrum analysis ; surface modification ; Tensile strength ; Textiles ; Washing ; Wettability ; Yarn
Is Part Of: Fibers, 2021-09, Vol.9 (9), p.54
Description: This paper presents an optimized washing protocol for as-received natural fibers, prior to large-scale composite manufacturing, for the structural strengthening of historic masonry. The aim was to achieve a simple protocol for standard cleaning of fiber surfaces from low molecular weight constituents that may be detrimental towards interfacial strength without damaging the fibers. The proposed procedure employs the application of the solvent sequence: ethanol, acetone, hexane, with optimized incubation times and stirring conditions. Additionally, this procedure may change the surface of the fiber, thereby enhancing the durability of the fiber-matrix interface. The washing protocol resulted in an increase of tensile strength by 56%, 52% and 22% for flax, hemp and sisal fibers, respectively, as compared to the corresponding non-washed fibers, without loss of elongation. The static contact angle measurements confirmed exposure of a higher fraction of the hydrophilic crystalline cellulose, with a higher wettability observed after washing protocols.
Publisher: Basel: MDPI AG
Language: English
Identifier: ISSN: 2079-6439
EISSN: 2079-6439
DOI: 10.3390/fib9090054
Source: ROAD: Directory of Open Access Scholarly Resources
ProQuest Central
DOAJ Directory of Open Access Journals

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Insight into the Effects of Solvent Treatment of Natural Fibers Prior to Structural Composite Casting: Chemical, Physical and Mechanical Evaluation

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