title: Mechanical and thermal properties of Posidonia oceanica cellulose nanocrystal reinforced polymer.
abstract: In the present study, cellulose nanocrystals (CNC) were isolated from Posidonia oceanica balls and leaves. CNC was prepared from this marine biomass by sulfuric acid hydrolysis (H2SO4) treatment. The raw fibers were firstly isolated by a delignification-bleaching process then the acid hydrolysis treatment was performed at 55°C during 40min under mechanical stirring. The ensuing CNCs were characterized by their morphological and thermal properties using transmission electron microscopy (TEM) and thermal gravimetric analysis (TGA), respectively. Nanocomposite materials using the CNC extracted from marine biomass were obtained by casting and evaporating a mixture of this suspension with poly(styrene-co-butyl acrylate). The effect of CNC loading on mechanical and thermal properties was studied. Dynamic mechanical analysis (DMA) results showed a strong reinforcing effect of CNC that depends on their origin (balls or leaves). The difference was attributed not only to differences in the aspect ratio of CNC but also to the stiffness of the percolating network of nanoparticles.
authors.affiliation: Research Unity of Applied Chemistry & Environment, Department of Chemistry, Faculty of Sciences, University of Monastir, 5019, Tunisia; Univ Grenoble Alpes, LGP2, F-38000 Grenoble, France; CNRS, LGP2, F-38000 Grenoble, France.
authors.forename: Fedia
authors.initials: F
authors.lastname: Bettaieb
authors.affiliation: Research Unity of Applied Chemistry & Environment, Department of Chemistry, Faculty of Sciences, University of Monastir, 5019, Tunisia; Univ Grenoble Alpes, LGP2, F-38000 Grenoble, France; CNRS, LGP2, F-38000 Grenoble, France.
authors.forename: Ramzi
authors.initials: R
authors.lastname: Khiari
authors.affiliation: Univ Grenoble Alpes, LGP2, F-38000 Grenoble, France; CNRS, LGP2, F-38000 Grenoble, France. Electronic address: alain.dufresne@pagora.grenoble-inp.fr.
authors.forename: Alain
authors.initials: A
authors.lastname: Dufresne
authors.affiliation: Research Unity of Applied Chemistry & Environment, Department of Chemistry, Faculty of Sciences, University of Monastir, 5019, Tunisia.
authors.forename: Mohamed Farouk
authors.initials: MF
authors.lastname: Mhenni
authors.affiliation: Univ Grenoble Alpes, LGP2, F-38000 Grenoble, France; CNRS, LGP2, F-38000 Grenoble, France.
authors.forename: Mohamed Naceur
authors.initials: MN
authors.lastname: Belgacem
mesh_terms: D000179:Acrylates / Q000737:chemistry*; D035961:Alismatales; D002482:Cellulose / Q000737:chemistry*; D006868:Hydrolysis; D046529:Microscopy, Electron, Transmission; D053761:Nanocomposites / Q000737:chemistry* / Q000648:ultrastructure; D053758:Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D018515:Plant Leaves / Q000737:chemistry; D011137:Polystyrenes / Q000737:chemistry*; D013464:Sulfuric Acids / Q000737:chemistry; D013818:Thermogravimetry
chemical_list: D000179:Acrylates; D011137:Polystyrenes; D013464:Sulfuric Acids; C509854:poly(styrene-b-tert-butylacrylate); D002482:Cellulose; C033158:sulfuric acid
keywords: Aspect ratio; Cellulose nanocrystal; Dynamic mechanical analysis; Nanocomposite; Posidonia oceanica