Development of antibacterial hemp hurd/poly(lactic acid) biocomposite for food packaging
PhD Thesis
Title | Development of antibacterial hemp hurd/poly(lactic acid) biocomposite for food packaging |
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Type | PhD Thesis |
Authors | |
Author | Khan, Belas Ahmed |
Supervisor | Wang, Hao |
Chevali, Venkata S. | |
Alam, Khorshed | |
Institution of Origin | University of Southern Queensland |
Qualification Name | Doctor of Philosophy |
Number of Pages | 242 |
Year | 2017 |
Digital Object Identifier (DOI) | https://doi.org/10.26192/5c05dff3d30d1 |
Abstract | Contemporary research in food packaging is being progressively focused on the development of biodegradable food packaging from biobased materials for exploring alternatives to traditional, non-biodegradable petroleum based plastics. Consequently, bioplastics are Poly(lactic acid) has been used in food packaging to replace conventional petroleum based plastics, because it possesses higher mechanical properties, greater versatility in process selection and it is deemed safe for use in food contact. However, apart from the high cost, a major shortcoming of poly(lactic acid) is a slow crystallization, and hence often requiring an added nucleating agent. The addition of low cost biobased filler to poly(lactic acid) not only lowers the overall material cost but also accelerates crystallization kinetics acting as a Industrial hemp hurd is explored as a biobased filler with poly(lactic acid) for biocomposites to lower material cost and to address environmental concerns associated with plastic recycling. However, a major concern for the combination of biobased fillers with polymer matrices to Accordingly, a biocomposite was developed using extrusion and injection moulding utilizing hemp hurd and poly(lactic acid) with properties comparable to poly(lactic acid) with grafting based interfacial compatibilization. Interfacial compatibility between poly(lactic acid) and hemp hurd increased with grafted glycidyl methacrylate in comparison to the noncompatibilized control, as corroborated by scanning electron microscopy fractography. The The antibacterial property of hemp hurd is anecdotally reported, but not systematically investigated and reported. In this study, the antibacterial activity of hemp hurd against Escherichia coli was investigated. The antibacterial activity of hemp hurd inhibiting the growth The inclusion of glycidyl methacrylate further assisted in elastic moduli and strength increase at 10–30 wt. % fraction of silver nanoparticle-loaded hemp hurd in poly(lactic acid), with 20 wt. % hemp hurd-filled biocomposite exhibiting the highest range of properties within the Cost-benefit analysis was performed to assess the viability in commercial manufacturing for producing rigid food packaging. The biocomposite sensitivity and financial analyses provided data on the degree and magnitude of uncertainties related to investment to afford better product The findings of this study could create a platform upon which packaging designers, food scientists and engineers could initiate to employ biobased materials in their food packaging solutions. |
Keywords | food packaging; poly(lactic acid) packaging; industrial hemp; biocomposite |
ANZSRC Field of Research 2020 | 401602. Composite and hybrid materials |
340502. Natural products and bioactive compounds | |
310602. Bioprocessing, bioproduction and bioproducts | |
Byline Affiliations | Centre for Future Materials |
https://research.usq.edu.au/item/q4v56/development-of-antibacterial-hemp-hurd-poly-lactic-acid-biocomposite-for-food-packaging
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