Topochemistry of cellulose nanofibers resulting from molecular and polymer grafting
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The aim of this study was to synthesize hydrophobic cellulose nanofibers (CNFs) using different chemical treatments including polymer and molecular grafting. For polymer grafting, immobilizing poly (butyl acrylate) (PBA) and poly (methyl methacrylate) (PMMA) on CNFs were implemented by the free radical method. Also, acetyl groups were introduced directly onto the CNFs surface by acetic anhydride for molecular grafting. The gravimetric and X-ray photoelectron spectroscopy analysis showed the high grafting density of PMMA on the surface of CNFs. AFM results revealed that molecular grafting created non-uniformity on the CNFs surface, as compared to polymer brushes. In addition, thermodynamic work of adhesion and work of cohesion for the modified CNFs were reduced in water and diiodomethane solvents. Dispersion factor was studied to indicate the dispersibility of CNFs in polar and non-polar media. Dispersion energy was reduced after modification as a result of decreasing interfacial tension and the dispersibility of modified CNFs was improved in diiodomethane.
KeywordsCellulose nanofibers Hydrophobicity Polymer brush Molecular grafting Thermodynamic of surface
The authors would like to thank Youssef Habibi from Department of Materials Research and Technology (MRT), Luxembourg Institute of Science and Technology (LIST), Luxembourg, for his scientific assistant.
- Aveyard R, Haydon DA (1973) An introduction to the principles of surface chemistry. Cambridge University Press, CambridgeGoogle Scholar
- Freire CSR, Silvestre AJD, PascoalNeto C, Gandini A, Fardim P, Holmbom B (2006) Surface characterization by XPS, contact angle measurements and ToF-SIMS of cellulose fibers partially esterified with fatty acids. J Colloid Interface Sci 301:205–209. doi: 10.1016/j.jcis.2006.04.074 CrossRefGoogle Scholar
- Islam MT, Alam MM, Zoccola M (2013) Review on modification of nanocellullose for application in composites. Int J Innov Res Sci Eng Tech 2:5444–5451Google Scholar
- Mittal KL (Ed.) (1993) Contact angle, wettability and adhesion: Festschrift in Honor of Professor Robert J. Good (vol 1). VSP Intl ScienceGoogle Scholar
- Mondal IH (2015) Nanocellulose, cellulose nanofibers, and cellulose nanocomposites: synthesis and applications. Nova Sci Publishers, New York (Incorporated) Google Scholar
- Navin Chand SCP, Singh RK (2012) Development and characterization of sisal nanofibre reinforced polyolefin composites. J Sci Res Rev 3:026–032Google Scholar
- Pavia DL, Lampman GM, Kriz GS, Vyvyan JA (2008) Introduction to spectroscopy. Cengage LearningGoogle Scholar
- Van Oss CJ (2008) The properties of water and their role in colloidal and biological systems. Elsevier, AmsterdamGoogle Scholar
- Vollhardt KPC, Schore NE (2014) Organic chemistry: structure and function. Freeman, W. HGoogle Scholar
- Wu S (1982) Polymer interface and adhesion. Marcel Decker, New YorkGoogle Scholar