Sustainable Polymer materials & related (Nano)composites with advanced properties and energy applications.

Research Group Leader : Dr Leila Bonnaud

Phone :+32(0)65.55.49.75

Secretariat : +32(0)65.37.34.83

ORCID ID: https://orcid.org/0000-0001-6733-0133

Dépôt Institutionnel de l’UMONS: https://di.umons.ac.be/catalogue.aspx

Research activities of this thematic are focused on the development of sustainable strategies to structure (biobased) polymeric materials (including polymers filled with particles –micro or nano- and blends of polymers…) and the understanding of the relations structure-properties, processing and performance in order to manufacture (biobased) advanced materials.

Main research areas involved:

-material synthesis and formulation including dispersion, confinement of particles within polymers, plasticization, grafting, functionalization of polymers, compatibilization of polymer blends, reactive blending

-material morphology

-material properties (mechanical, electrical, thermal, fire, self-healing, gas permeability…)

-material durability (aging –thermal, UV, specific conditions-, biodegradation, recycling)

-energy harvesting

Top selected papers

Multifunctionality of structural nanohybrids: the crucial role of carbon nanotube covalent and non-covalent functionalization in enabling high thermal, mechanical and self-healing performance

Raimondo, M., Naddeo, C., Vertuccio, L., Bonnaud L., Dubois, Ph., Binder, W.H., Sorrentino, A., Guadagno, L. Abstract This study proposes new kinds of functionalization procedures able to preserve specific properties of carbon nanotubes (CNTs) and to improve compatibility with the epoxy matrix. Through a covalent approach, for the first time, CNTs are functionalized with the same hardener agent, 4,4'-diaminodiphenyl sulfone, employed to solidify the epoxy matrix and capable to fulfill mechanical requirements of industrial structural resins. The same CNTs are non-covalently modified through the polymer wrapping mechanism with benzoxazine (Bz) terminated polydimethylsiloxane (PDMS). The comparison between electrical and mechanical properties...
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Cerium Salts: An Efficient Curing Catalyst for Benzoxazine Based Coatings

Tao Zhang, Leila Bonnaud, Jean-Marie Racquez, Marc Poorteman, Marjorie Olivier and Philippe Dubois Abstract The effect of three different cerium salts (Ce(NO3)3·6H2O, CeCl3·7H2O and Ce(OOCCH3)3·5H2O) on the ring-opening polymerization (ROP) of a model diamine-based benzoxazine (4EP-pPDA) was investigated. With the incorporation of the cerium salts, the curing temperature of 4EP-pPDA is reduced substantially, and the glass transition temperatures of the resulting networks are increased significantly. The three cerium salts exhibit different catalytic activities, which were analyzed by FT-IR, NMR, and energy-dispersive X-ray (EDX). Ce(NO3)3·6H2O was found to exhibit the best catalytic effect, which seems to be related to its better...
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Enhancement of thermal conductivity in epoxy coatings through the combined addition of expanded graphite and boron nitride fillers

Isaac Isarn, Leïla Bonnaud, Lluís Massagués, Àngels Serra, Francesc Ferrando Abstract Expanded graphite (EG) and boron nitride (BN) were used as fillers to impart thermal conductivity (TC) while maintaining electrical insulation of a homopolymerized cycloaliphatic epoxy matrix. Even though EG leads to a higher increase of TC than BN (550% of enhancement with only a 7.5 wt.% of EG), EG is also electroconductive and its ratio in the formulation must be lower than the percolation threshold. Formulations with proportions between 2.5–7.5 wt.% of EG as the filler and mixtures with EG and a 40 wt.% of BN were thermally polymerized and composites with...
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High‐Performance Bio‐Based Benzoxazines from Enzymatic Synthesis of Diphenols

Leïla Bonnaud, Benjamin Chollet, Ludovic Dumas, Aurélien A. M. Peru, Amandine L. Flourat, Florent Allais, and Philippe Dubois Abstract This paper reports the preparation, characterization, and performance of three low viscosity fully bio‐based benzoxazine resins synthesized from bio‐based furfurylamine, paraformaldehyde, and three new enzymatic originated diphenols obtained through a sustainable and highly selective lipase‐catalyzed enzymatic process from p‐coumaric acid, and three bio‐based diols (propanediol, butanediol, and isosorbide, respectively). The enzymatic method is used for the first time, to the authors’ knowledge, to design specific diphenolic structures dedicated to the preparation of benzoxazine thermosetting resins whose precursors exhibit easy handling within a...
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A benzoxazine/substituted borazine composite coating: A new resin for improving the corrosion resistance of the pristine benzoxazine coating applied on aluminum

Alexis Renaud⁠, Leïla Bonnaud⁠, Ludovic Dumas⁠, Tao Zhang⁠, Yoann Paint⁠, Francesco Fasano⁠, Olesia Kulyk⁠, Eva Pospisilova⁠, Bernard Nysten⁠, Arnaud Delcort⁠e, Davide Bonifazi⁠, Philippe Dubois⁠, Marie-Georges Olivier⁠, Marc Poorteman Abstract In this paper, laboratory synthesized Phenol-paraPhenyleneDiAmine (P-pPDA) benzoxazine containing different amounts of B-trimesityl-N-triphenylborazine was applied by spin coating on aluminum and thermally cured. The addition of the borazine derivative (borazine 1) does not appear to modify the curing characteristics of the P-pPDA matrix itself as shown by FTIR, DSC and DEA analyses; however, some interactions - chemical and/or physical (co-crystallization) – between P-pPDA and borazine 1 cannot be excluded. The microstructure of the composites...
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