Abstract
The aim of this work is to improve the mechanical, thermal and water absorption properties of PLCHZ composites. The formation of the composites are mixing polylactic acid with zinc oxide nanoparticles (ZnO) and chitosan as filler. It produced through the precipitation method using a water bath under a temperature of 60 oC. Five prepared samples are pure PLA, PLCH, PLCHZa, PLCHZb and PLCHZc. The incorporating effect of fillers on the properties of samples is investigated in terms of mechanical, thermal and water absorbtion test. The result showed that mechanical and thermal properties increased with the addition of ZnO nanoparticles compared to pure PLA and PLCH. Nevertheless, those properties increased up to 2 wt% of ZnO nanoparticles loading but decreased when it content is increased up to 3 wt% and 4 wt%. PLCHZa with the smallest content of 2 wt% ZnO nanoparticles showed the highest value of 15 MPa in tensile strength and 330.6 oC in thermal resistant. In water absorbtion test, PLCHZc with 4 wt% ZnO has better absorb ability as well as the lowest percentage absorption rate of 0.02% to 0.03%. It can be conclude that ZnO nanoparticles play an important role in the main properties of polymer composites.
Highlights
Around 50% of packaging products made of a polymer which is mostly generated from fossil fuels
Tensile modulus and elongation at break of the Polylactic acid (PLA), PLCH and PLCHZa, PLCHZb, and PLCHZc composites have been investigated through coaxial force by Universal Testing Machine tools
It can be seen that the addition of chitosan and zinc oxide nanoparticles (ZnO) nanoparticle showed improvement better mechanical properties of the polymer when compared to pure polymer without mixing (PLA)
Summary
Around 50% of packaging products made of a polymer which is mostly generated from fossil fuels. The resulting polymer products can be adapted to the ability of supramolecular induction in Effect of Zinc Oxide Nanoparticles on The Thermal, Mechanical and Water Absorption Properties of Polylactic Acid/Chitosan Composites aqueous media or interfaces to produce micro or nanostructures with almost unlimited applications in the fields of pharmaceutical, medical and biotechnology. Polylactic acid (PLA) is an abundant, commercially available, environmental friendly polymer due to its biodegradability and good sitfness properties. Another advantage of the PLA are transparent and safe to use for the medical field. The PLA has a lower mechanical and thermal properties compared to other polymers To overcome these weaknesses, PLA can be enhanced properties with the addition of filler material as chitosan, zinc oxide, clay and others in the form of nanocomposite [7]
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