PSI - Issue 64

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Available online at www.sciencedirect.com Structural Integrity Procedia 00 (2023) 000 – 000 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2023) 000 – 000 ScienceDirect

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Procedia Structural Integrity 64 (2024) 1896–1903

SMAR 2024 – 7th International Conference on Smart Monitoring, Assessment and Rehabilitation of Civil Structures Use of nanocomposite coatings and chemical treatments to improve mechanical performance of bio-composite materials Chiara Pepi a , Maria Eleonora Pipistrelli a, *, Massimiliano Gioffrè a , Loredana Latterini b , Laura Tomassoli b , Francesco Vinti b a Department of Civil and Environmental Engineering, University of Perugia,Via Goffredo Duranti 93, Perugia, 06125, Italy b Nano4Light-Lab, Department of Chemistry, Biology and Biotechnology, University of Perugia,Via Elce di Sotto 8,, Perugia, 06123, Italy Abstract The building industry demonstrated a growing interest in recently developed biocomposite materials for structural strengthening based on natural fibers as an alternative to synthetic fibers. In the last years, research activities were focused on investigating the mechanical properties of different types of natural fibers, e.g. hemp, sisal, kenaf, Spanish Broom fibers. Despite the numerous advantages associated with the use of these natural resources towards sustainability, their performance is affected by shortcomings given by their morphology, mechanical behavior, and durability. These factors can compromise the interaction between matrix and fibers, resulting in poor structural performance. Indeed, when natural fibers are embedded in mortar-based matrices, cracks of the mortar can occur at early load stage before the natural fibers begin to fulfill their reinforcing role. This work investigates the use of bio-based coatings and treatments for natural fibers to improve the fibers mechanical properties. Treatments based on sodium hydroxide are investigated to eliminate non-cellulosic components, resulting in an compatibility with mortar. Graphene-based coatings are employed to improve the mechanical behavior of vegetal fibers in terms of resistance. © 2024 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of SMAR 2024 Organizers SMAR 2024 – 7th International Conference on Smart Monitoring, Assessment and Rehabilitation of Civil Structures Use of nanocomposite coatings and chemical treatments to improve mechanical performance of bio-composite materials Chiara Pepi a , Maria Eleonora Pipistrelli a, *, Massimiliano Gioffrè a , Loredana Latterini b , Laura Tomassoli b , Francesco Vinti b a Department of Civil and Environmental Engineering, University of Perugia,Via Goffredo Duranti 93, Perugia, 06125, Italy b Nano4Light-Lab, Department of Chemistry, Biology and Biotechnology, University of Perugia,Via Elce di Sotto 8,, Perugia, 06123, Italy Abstract The building industry demonstrated a growing interest in recently developed biocomposite materials for structural strengthening based on natural fibers as an alternative to synthetic fibers. In the last years, research activities were focused on investigating the mechanical properties of different types of natural fibers, e.g. hemp, sisal, kenaf, Spanish Broom fibers. Despite the numerous advantages associated with the use of these natural resources towards sustainability, their performance is affected by shortcomings given by their morphology, mechanical behavior, and durability. These factors can compromise the interaction between matrix and fibers, resulting in poor structural performance. Indeed, when natural fibers are embedded in mortar-based matrices, cracks of the mortar can occur at early load stage before the natural fibers begin to fulfill their reinforcing role. This work investigates the use of bio-based coatings and treatments for natural fibers to improve the fibers mechanical properties. Treatments based on sodium hydroxide are investigated to eliminate non-cellulosic components, resulting in an compatibility with mortar. Graphene-based coatings are employed to improve the mechanical behavior of vegetal fibers in terms of resistance. © 2024 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of SMAR 2024 Organizers © 2024 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of SMAR 2024 Organizers

Keywords: Biocomposite material, coating, vegetal fibers, durability, graphene.

* Corresponding author. Tel.: +39-075-585-3902; fax: +39-075-585-3897. E-mail address: mariaeleonora.pipistrelli@studenti.unipg.it

2452-3216 © 2024 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of SMAR 2024 Organizers 2452-3216 © 2024 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of SMAR 2024 Organizers * Corresponding author. Tel.: +39-075-585-3902; fax: +39-075-585-3897. E-mail address: mariaeleonora.pipistrelli@studenti.unipg.it

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