Article (Scientific journals)
Organo-Mediated Ring-Opening Polymerization of Ethylene Brassylate from Cellulose Nanofibrils in Reactive Extrusion.
Avella, Angelica; Rafi, Abdolrahim; Deiana, Luca et al.
2024In ACS Sustainable Chemistry and Engineering, 12 (29), p. 10727 - 10738
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Keywords :
cellulose nanofibrils; ethylene brassylate; grafting; organic catalyst; reactive extrusion; ring-opening polymerization; Biodegradable polyesters; Castor oil; Cellulose nanofibrils; Ethylene brassylate; Macrolactones; Organic catalysts; Organocatalysis; Organometallic catalysts; Reactive extrusions; Ring-opening polymerization; Chemistry (all); Environmental Chemistry; Chemical Engineering (all); Renewable Energy, Sustainability and the Environment
Abstract :
[en] Ethylene brassylate is a renewable macrolactone from castor oil that can be polymerized via ring-opening polymerization (ROP) to obtain a fully biosourced biodegradable polyester. ROP mediated by organometallic catalysts leads to high molar mass poly(ethylene brassylate) (PEB). However, the use of metal-free organocatalysis has several advantages, such as the reduction of toxic and expensive metals. In this work, a novel cellulose nanofibril (CNF)/PEB nanocomposite fabrication process by organocatalysis and reactive extrusion (REx) is disclosed. Here, ROP was carried out via solvent-free REx in the presence of CNFs using organic 1,5,7-triazabicyclo[4.4.0]dec-5-ene as a catalyst. Neat or lactate-esterified CNFs (LACNF) were used as initiators to investigate the effect of surface topochemistry on the in situ polymerization and the properties of the nanocomposites. A molar mass of 9 kDa was achieved in the presence of both unmodified and LACNFs with high monomer conversion (>98%) after 30 min reaction in a microcompounder at 130 °C. Tensile analysis showed that both nanofibril types reinforce the matrix and increase its elasticity due to the efficient dispersion obtained through the grafting from polymerization achieved during the REx. Mechanical recycling of the neat polymer and the nanocomposites was proven as a circular solution for the materials' end-of-life and showed that lactate moieties induced some degradation.
Disciplines :
Chemistry
Author, co-author :
Avella, Angelica ;  Department of Industrial and Materials Science, Chalmers University of Technology, Rännvägen 2A, Göteborg 41258, Sweden
Rafi, Abdolrahim;  Department of Natural Sciences, Mid Sweden University, Holmgatan 10, Sundsvall 85170, Sweden
Deiana, Luca;  Department of Natural Sciences, Mid Sweden University, Holmgatan 10, Sundsvall 85170, Sweden
MINCHEVA, Rosica  ;  Université de Mons - UMONS > Faculté des Sciences > Service des Matériaux Polymères et Composites
Córdova, Armando ;  Department of Natural Sciences, Mid Sweden University, Holmgatan 10, Sundsvall 85170, Sweden
Lo Re, Giada ;  Department of Industrial and Materials Science, Chalmers University of Technology, Rännvägen 2A, Göteborg 41258, Sweden
Language :
English
Title :
Organo-Mediated Ring-Opening Polymerization of Ethylene Brassylate from Cellulose Nanofibrils in Reactive Extrusion.
Publication date :
22 July 2024
Journal title :
ACS Sustainable Chemistry and Engineering
eISSN :
2168-0485
Publisher :
American Chemical Society, United States
Volume :
12
Issue :
29
Pages :
10727 - 10738
Peer reviewed :
Peer Reviewed verified by ORBi
Research unit :
S816 - Matériaux Polymères et Composites
Research institute :
Matériaux
Funders :
Vetenskapsr??det
European Commission
European Commission
Chalmers Tekniska H??gskola
Knut och Alice Wallenbergs Stiftelse
Mittuniversitetet
Gouvernement Wallon
Wallenberg Wood Science Center
Funding text :
GLR acknowledges Knut and Alice Wallenberg Biocomposites [grant number V-2019-0041, Dnr. KAW 2018.0551], Wallenberg Wood Science Center program 3.0 and Chalmers Genie for financial support. Financial support by the Swedish National Research Council (VR), Mid Sweden University, and the European Union is also acknowledged. R.M. acknowledges the financial support from the FEDER and Wallonia in the frame of the LCFM-BIOMAT_1 project.
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since 19 December 2024

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