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08.07.2021 | Original Research

Octadecylamine as chemical modifier for tuned hydrophobicity of surface modified cellulose: toward organophilic cellulose nanocrystals

verfasst von: Mohammed Majdoub, Younes Essamlali, Othmane Amadine, Ikram Ganetri, Anass Hafnaoui, Mehdi Khouloud, Mohamed Zahouily

Erschienen in: Cellulose | Ausgabe 12/2021

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Abstract

A novel, environmentally friendly and simple method for chemical functionalization of microcrystalline cellulose (MCC) to produce organophilic cellulose nanocrystals (CNC-ODA) is herein proposed. Surface modification of MCC was successfully achieved by simple chemical oxidation followed by citric acid esterification and amidation reactions. The resultant nanocrystals were fully characterized for their chemical structure, morphology, crystalline structure, thermal stability, and surface hydrophobicity. FTIR analysis revealed that the long chain hydrocarbon structure was successfully grafted onto CNC surfaces. The crystallinity index of the cellulosic materials calculated by the Segal equation from the corresponding X-ray diffraction (XRD) patterns was relatively reduced from 83.27% for microcrystalline cellulose to 71.12% for organophilic cellulose nanocrystals (CNC-ODA). Moreover, CNC-ODA showed improved thermal stability than unmodified MCC as elucidated by TGA. Scanning electron microscopy, atomic force microscopy and transmission electron microscopy showed significant change in the size and shape of the produced nanocrystals. The effectiveness of ODA grafting was evidenced by the enhanced hydrophobicity and the long-term stability of the colloidal suspension of organophilic cellulose nanocrystals in various organic solvents which enables this material to be used as highly hydrophobic coating and reinforcing agent for solvent-borne nanocomposites systems. The adopted approach is qualified as environmentally friendly for mass-production of organophilic cellulose nanocrystals without any use of organic solvents or toxic reagents.

Vorheriger Artikel Dye adsorption revisited: application of the cationic dye adsorption method for the quantitative determination of the acidic surface groups of nanocellulose materials

Nächster Artikel Degradation mechanism of green biopolyester nanocomposites with various cellulose nanocrystal based nanohybrids

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Titel: Octadecylamine as chemical modifier for tuned hydrophobicity of surface modified cellulose: toward organophilic cellulose nanocrystals
verfasst von: Mohammed Majdoub
Younes Essamlali
Othmane Amadine
Ikram Ganetri
Anass Hafnaoui
Mehdi Khouloud
Mohamed Zahouily
Publikationsdatum: 08.07.2021
Verlag: Springer Netherlands
Erschienen in: Cellulose / Ausgabe 12/2021
Print ISSN: 0969-0239
Elektronische ISSN: 1572-882X
DOI: https://doi.org/10.1007/s10570-021-04044-w

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