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Synthesis of graft -copolymers from palm cellulose and solketal acrylate and their characterization

Beyaz, Khaled and Charton, Michael and Rouilly, Antoine and Vedrenne, Emeline and Vaca-Garcia, Carlos and Benaboura, Ahmed and Thiebaud-Roux, Sophie Synthesis of graft -copolymers from palm cellulose and solketal acrylate and their characterization. (2017) Industrial Crops and Products, 97. 32-40. ISSN 0926-6690

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Official URL: https://doi.org/10.1016/j.indcrop.2016.12.001


he use of partially biobased monomers to functionalize palm cellulose via graft-copolymerization was explored. The aim of this work is to recycle a waste, the leaves of palm trees, which are abundant in North African countries in order to obtain novel cellulose derivatives having interesting physico-chemical properties. Furthermore, the monomer that was used for the graft-copolymerization was synthesized from a biobased synthon, glycerol. The synthesis of graft-copolymers from cellulose and (2,2-dimethyl-1,3-dioxolan-4-yl)methyl acrylate (solketal acrylate, DMDMA) was studied to determine the optimal conditions for grafting. The maximum grafting weight gain was 27% obtained after 72min of reaction at 65°C with 6.4mmol KPS/eq OH and 1.51mol DMDMA/eq OH. THF, used as dispersion solvent, hinders the homopolymerization side-reaction by creation of terminating radicals. FTIR spectroscopy confirmed the grafting of monomers to cellulose and X-ray diffraction revealed an organized structure of the side-chains. Thermogravimetry showed that the grafting could not confer a higher thermal stability to cellulose (loss of 35°C in the decomposition temperature). Even though partial melting was observed when thermopressed, DSC analysis could not show a neat glass transition temperature but rather multiple exothermal peaks attributed to side-chains reorganization. Thermopressed grafted samples showed improved mechanical properties compared to palm cellulose.

Item Type:Article
HAL Id:hal-02064822
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
French research institutions > Institut National de la Recherche Agronomique - INRA (FRANCE)
Other partners > Université des Sciences et de la Technologie Houari Boumediene - USTHB (ALGERIA)
Laboratory name:
Deposited On:12 Mar 2019 10:11

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