Figure - uploaded by A B Hemavathi
Content may be subject to copyright.
PLA based nanocomopsites for food packaging applications PLA based nanocomposites Advantages over neat PLA PLA/CNF Fully bio-based and biodegradable nanocomposite.
Source publication
Polymer based materials have almost replaced the conventional materials like paper, paper board, metal and glass in the food packaging applications due to their convenience, versatility and tailor-made properties. In spite of their widespread acceptance as better option due to light weight, easy processesability, low cost, long term retention of fo...
Context in source publication
Context 1
... is considered as a bio-reinforcement of low density, high specific strength, high modulus and large aspect ratio which can be added to PLA to enhance the mechanical properties. Table 2 summarizes the advantages of PLA based nanocomopsites for food packaging applications. Improved barrier property. ...Similar publications
In 2021, global plastics production was 390.7 Mt; in 2022, it was 400.3 Mt, showing an increase of 2.4%, and this rising tendency will increase yearly. Of this data, less than 2% correspond to bio-based plastics. Currently, polymers, including elastomers, are non-recyclable and come from non-renewable sources. Additionally, most elastomers are ther...
Citations
... The main draw back of PLA is its poor barrier property towards water vapor and oxygen. This can be overcome by addition of nanoparticles [7]. Many food products organoleptic properties are goverened by its effective retention of freshness and aroma/flavor. ...
Environmentally benign, biodegradable materials derived from renewable resources are gaining great consideration in recent times. Food packaging requires FDA approved, lightweight and low cost materials with superior barrier properties for extended shelf life and good flavor/aroma retention. In the present study, polylactic acid (PLA) modified with triethyl citrate (TEC) as a bioplasticizer was reinforced with copper nanoparticles and tested for possible improvement in mechanical and barrier properties. The increase in TEC content upto 8 wt% improved the toughness, beyond 8 wt% there was a decrease in tensile strength and modulus. A nanocomposite film of PLA/TEC/copper nanoparticle (92/8/3 wt%) displayed better barrier properties and optimum mechanical strength. The water vapor permeability and oxygen permeability rate was drastically decreased upon addition of nanocopper.
Epoxies are a versatile class of resins, well-known for its excellent combination of properties like light weight, chemical resistance, fatigue strength, custom-made impact resistance, and can be tailored to be biocompatible. Although ceramic and metallic composites are widely accepted for the development of biomaterials, their heaviness, non-resorbability, and necessity of second surgical operation to remove the implant after healing induces extra pain for the patients; hence, they were gradually replaced by polymer composites. Epoxies can be self-cross-linked or cross-linked with external curatives at stoichiometric ratio to achieve desired properties and purity. Advances in epoxy-based biomedical composites have been focused on the design of implants with concerns on comfort, biocompatibility, precise property matching, light weight, and closely mimicking natural structures in performance. Epoxy-based materials are also having footprints in drug delivery and tissue engineering. The chapter highlights epoxy usage in the biomedical field for various advanced applications.
