عنوان مقاله [English]
Biopolymers are considered to be the most promising alternatives to petroleum-based polymers, because they can greatly reduce the dependence on petroleum and reduce environmental pollution. Chitosan as one of the most abundant bio-polymers in nature, has got unique properties, including renewable, biodegradable, non-toxic, and excellent performance in terms of film formation. These properties have potentially made this biopolymer so useful in coatings to enhance shelf life of foods, textile, pharmaceutical, and papermaking. Due to the hydrophilic nature, such polysaccharide films show poor mechanical properties that limits its application. Incorporating nano-materials into the basic biopolymer, known as nano-composite films, is one of the promising methods to improve mechanical properties of biopolymer-based films. In this regard, the purpose of this study is to investigate the effect of different concentrations of nanofiller on the mechanical properties of chitosan films. The nanoparticles such as graphene, carbon nanotub, nanoclay and nanocellulose used to make composites that are used as reinforcement. It was observed that the mechanical properties of chitosan based nanocomposites depend on three major factors, such as properties of polymer matrix and nano-reinforcing agent, together with interfacial interaction between filler surface and matrix polymer. Further, for a specific nano-reinforcement and matrix polymer, the properties of a polymeric nanocomposites are very much dependent on the dispersion and distribution of nanomaterials in the continuous matrix phase.