Synthesis and description characterization of triazole functionalized cellulose nanowhisker

Cellulose, the most abundant, polysaccharides in nature, is one of the natural and renewable resources of raw material for the increasing requirement for environmentally friendly and biocompatible products. By dissolving the amorphous or less ordered regions of the naturally occurring cellulose fibers by acid hydrolysis, cellulose nanowhiskers (CNW), are prepared as a new class of nano-materials. Compared to cellulose fibers, needle-like CNW possesses many advantages, such as dimensions in nanometer scale, good mechanical properties, unique optical properties, etc. However, the development of high-performance CNW-based materials is restricted by some limitations. Surface chemical modification via the reaction between the hydroxyl groups located at the surface of CNCs and a functional group from the organ modifying agents has been proposed as an approach to overcome this shortcoming.1-3 Click reaction is one of the chemical modification methods which can be used for this purpose. This reaction can be performed under mild reaction conditions, shows high yields and has a good tolerance toward a wide range of functional groups and reaction conditions in the material science.4,5 In In this study, cellulose nanowhiskers (CWs) extracted from cotton fibers were successfully modified with triazole rings through Click” reaction without using hazardous reagents(Fig.1). The surface modification of CWs was performed with calcium carbide, as cheap and commercially available precursors. In this reaction, calcium carbide provides acetylide linkages. These new synthesized biopolymeric nanoparticles were characterized by spectroscopic measurement methods such as IR spectroscopy, NMR spectroscopy, scanning electron microscopy, etc. Taking advantage of the straightforward and gram-scale synthesis as well as physical and chemical properties, prepared nanocomposite is of high interest for water pollutants and wastewater treatment.

کلیدواژه ها:

Cellulose nanowhiskers ، Click reaction ، Calcium carbide ، Triazole rings