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Article

Sustainably Processed Waste Wool Fiber-Reinforced Biocomposites for Agriculture and Packaging Applications

1
Institute of Industrial Systems and Technologies for Advanced Manufacturing, Italian National Research Council, Corso Giuseppe Pella 16, 13900 Biella, Italy
2
Department of Natural and Synthetic Polymers, University “Gheorghe Asachi” of Iasi, Str. Prof. Dr. Doc. Dimitrie Mageron, nr. 28, 700050 Iasi, Romania
*
Author to whom correspondence should be addressed.
Academic Editor: Tao-Hsing Chen
Fibers 2021, 9(9), 55; https://doi.org/10.3390/fib9090055
Received: 21 July 2021 / Revised: 23 August 2021 / Accepted: 27 August 2021 / Published: 1 September 2021
(This article belongs to the Topic Multiple Application for Novel and Advanced Materials)
In the EU, sheep bred for dairy and meat purposes are of low quality, their economic value is not even enough to cover shearing costs, and their wool is generally seen as a useless by-product of sheep farming, resulting in large illegal disposal or landfilling. In order to minimize environmental and health-related problems considering elemental compositions of discarded materials such as waste wool, there is a need to recycle and reuse waste materials to develop sustainable innovative technologies and transformation processes to achieve sustainable manufacturing. This study aims to examine the application of waste wool in biocomposite production with the help of a sustainable hydrolysis process without any chemicals and binding material. The impact of superheated water hydrolysis and mixing hydrolyzed wool fibers with kraft pulp on the performance of biocomposite was investigated and characterized using SEM, FTIR, tensile strength, DSC, TGA, and soil burial testing in comparison with 100% kraft pulp biocomposite. The superheated water hydrolysis process increases the hydrophilicity and homogeneity and contributes to increasing the speed of biodegradation. The biocomposite is entirely self-supporting, provides primary nutrients for soil nourishment, and is observed to be completely biodegradable when buried in the soil within 90 days. Among temperatures tested for superheated water hydrolysis of raw wool, 150 °C seems to be the most appropriate for the biocomposite preparation regarding physicochemical properties of wool and suitability for wool mixing with cellulose. The combination of a sustainable hydrolysis process and the use of waste wool in manufacturing an eco-friendly, biodegradable paper/biocomposite will open new potential opportunities for the utilization of waste wool in agricultural and packaging applications and minimize environmental impact. View Full-Text
Keywords: superheated water hydrolysis; hydrolyzed wool; kraft pulp; paper/biocomposite superheated water hydrolysis; hydrolyzed wool; kraft pulp; paper/biocomposite
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MDPI and ACS Style

Bhavsar, P.; Balan, T.; Dalla Fontana, G.; Zoccola, M.; Patrucco, A.; Tonin, C. Sustainably Processed Waste Wool Fiber-Reinforced Biocomposites for Agriculture and Packaging Applications. Fibers 2021, 9, 55. https://doi.org/10.3390/fib9090055

AMA Style

Bhavsar P, Balan T, Dalla Fontana G, Zoccola M, Patrucco A, Tonin C. Sustainably Processed Waste Wool Fiber-Reinforced Biocomposites for Agriculture and Packaging Applications. Fibers. 2021; 9(9):55. https://doi.org/10.3390/fib9090055

Chicago/Turabian Style

Bhavsar, Parag, Tudor Balan, Giulia Dalla Fontana, Marina Zoccola, Alessia Patrucco, and Claudio Tonin. 2021. "Sustainably Processed Waste Wool Fiber-Reinforced Biocomposites for Agriculture and Packaging Applications" Fibers 9, no. 9: 55. https://doi.org/10.3390/fib9090055

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