Novel ethylene diamine functionalised nanocellulose/poly(ethylene-co-acrylic acid) composites for biomedical applications
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Functionalisation is a viable route for enhancing the interfacial interactions between a hydrophobic polymer matrix and a hydrophilic reinforcement. One of the challenges in this strategy, particularly for reinforcements similar to cellulose, is the improvement in interfacial adhesion while not sacrificing the key properties including biocompatibility. In this part of the present investigation, cellulose nanoparticles were functionalised with ethylene diamine to form aminodeoxy cellulose nanoparticles and subsequently incorporated into poly(ethylene-co-acrylic acid) to develop composites. The successful functionalisation was confirmed by FTIR. TEM analysis showed that the reinforcement particles retained their nanodimensions even after functionalisation. The mechanical properties of EAA films were found to be improved by the addition of functionalised nanoparticles. Thermal stability of the nanoparticles and composites was seen to be improved by functionalisation. The functionalised nanocellulose reinforced composites showed excellent biocompatibility.
KeywordsEAA Chlorodeoxy cellulose Aminodeoxy cellulose Biocomposite
The first author wish to kindly acknowledge Council for Scientific and Industrial Research, Govt. of India for JRF fellowship and Centre for Engineering Research and Development, Kerala for the Research Seed Money project.