Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 33 for “"bioplastics"”.
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Making bioplastics : an investigation of material-product relationships
This study explores how bioplastics come into being and are changing by focusing on the relationship between bioplastic materials and the products into which they are made. Bioplastics, which are types of plastics that are made from plant sources and/or can be decomposed by microbial activity, are …
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Laser-induced breakdown spectroscopy applied to pasture, titanium, and bioplastics
… organic systems. Employing LIBS to discriminate bioplastics from regular plastics was explored in recycle waste streams. If bioplastics are present in the recovery process of regular plastics the resulting product contains impurities. This study was undertaken to determine the feasibility of …
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Extrusion foaming of bioplastics for lightweight structure in food packaging
This thesis reports the systematic approaches to overcome the key drawbacks of the pure PHBV, namely low crystallisation rate, tensile strength, ductility, melt viscosity, thermal stability and high materials cost. The physical, mechanical, thermal, and rheological properties of the pure PHBV were …
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Bioplastics from C1 Gases - Substitute Sustainable Products for Polymer Coated Steel
Tata Steel, one of the largest producers of steel in the world, emits more than 6 million tonnes of CO2 annually, with blast furnaces accounting for 70% of this CO2 emission. To lessen the amount of greenhouse gases discharged into our atmosphere and to limit their effect on the environment, it is …
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IMPROVING THE CIRCULARITY OF BIODEGRADABLE BIOPLASTICS BY PRODUCING BIOGAS: A FULL-SCALE ASSESSMENT
… acid (PLA) is one of the commonly used bioplastics, promoted as a sustainable alternative to conventional plastics. Their anaerobic co-digestion with the organic fractions of municipal solid waste (OFMSW) is a promising end-of-life scenario, as it reduces pre-treatment and increases …
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Effect of glycerol and water activity on the processing and properties of egg white-based bioplastics
Protein-based bioplastics are a new generation of plastics and are suitable to be produced commercially on a large scale using the same manufacturing methods as petroleum-based plastics. However, proteins require thermoplasticization prior to undergoing these thermal processes. In a first study, …
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Development and Characterization of sustainable Materials from invasive brown Seaweed Ruguopteryx okamurae
… explored: the first involved the production of bioplastics and biocomposites by combining freeze-dried seaweed with glycerol as a plasticizer and blending it with polycaprolactone, acylated soy protein isolate, and cassava starch. These materials were processed through injection molding and …
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Investigating the Impact of Health and Environmental Framing on Consumer Preference for Sustainable Food Packaging: A Choice Experiment
… to typical PET plastic packaging, namely bioplastics. Bioplastics are seen as a more sustainable alternative to PET plastic as they are biodegradable and made from renewable sources all while retaining the desirable qualities of plastic. The competitiveness of sustainable packaging …
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Production of biofuels and biodegradable plastics from common waste substrates in engineered Ralstonia eutropha
… evaluated for the production of biofuels and bioplastics. R. eutropha valine biosynthesis pathway was modified, so its intermediate 2- ketoisovalerate can be converted to isobutanol, a drop-in biofuel that can directly substitute for fossil-based fuels and be employed within the current …
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The Green Shift
… applications, particularly in the development of bioplastics and bio-based concrete. It then transitions into spatial narratives where algae inspire sensory and symbolic architectural expressions, positioning the organism as a medium of revelation. Finally, the thesis interrogates the intersection …
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Architectural scale biomimetic composites based on chitosan and alginate hydrogels
… scale digital fabrication using natural bioplastics and hierarchical computational design carried out by the Mediated Matter team, led by Laia Mogas-Soldevila and Jorge Duro-Royo. Chitosan and alginate (among other natural polymers) are processed from shellfish waste and algae, …
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Harnessing <i>Haloferax mediterranei</i> for Bioplastic Production from Organic Waste
… food waste into high-value biodegradable bioplastics. The dissertation first reviewed current knowledge on the organism's physiology and poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) synthesis metabolism of this halophilic archaeon, identifying key technical challenges such as waste …
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Design for the environmental emergency: Plastic chairs and the transition to low-carbon product design
… renewable carbon plastics (recycled plastic and bioplastics). My interviews with international contemporary designers and representatives from industry are critically evaluated, alongside case studies of recent plastic chairs made using renewable carbon plastics. Findings from that research led …
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Biosynthesis and characterisation of polyhydroxyalkanoate biopolymers and their oligomers for circular economy
Polyhydroxyalkanoates (PHAs) are biodegradable bioplastics that can potentially replace non-biodegradable petroleum-based plastics. However, the high production cost of PHAs which is associated with the high cost of starting substrate extraction solvents limits its integration into large scale …
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Halloysite for smart nano-structured materials in sustainable applications
… aim to improve the properties of Mater-Bi based bioplastics. The evaluation of the mechanical performance was carried out by Dynamic Mechanical Analysis (DMA), which allowed to recognize halloysite as the most efficient among the investigated clays. Hence, the effect of HNTs content was also …
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Production of polyhydroxyalkanoate copolymers from plant oil
… be used to convert renewable resources into PHA bioplastics, which can serve as biodegradable alternatives to traditional petrochemical plastics. A promising feedstock for PHA production is palm oil, a major agricultural product in Southeast Asia. Strains of R. eutropha were engineered to …
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Decoloured Bloodmeal Based Bioplastic
Renewable and compostable bioplastics can be produced from biopolymers such as proteins. Animal blood is a by-product from meat processing and is rich in protein. It is dried into low value bloodmeal and is used as animal feed or fertiliser. Previous work has shown that bloodmeal can be converted …
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Fermentation of organic waste for bioplastic production : A potential sustainable alternative to fossil-fuel plastic
… and sustainable materials. This is where bioplastics reveal their importance. They can be bio-produced by microorganisms from organic waste, they are biodegradable and can be reused. Their production relies on a circular economy system making it sustainable. Here lies the relevance of …
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Fermentation of organic waste for bioplastic production. A potential sustainable alternative to fossil-fuel plastic
… and sustainable materials. This is where bioplastics reveal their importance. They can be bio-produced by microorganisms from organic waste, they are biodegradable and can be reused. Their production relies on a circular economy system making it sustainable. Here lies the relevance of …
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Producción de gas de síntesis a partir de pirólisis de residuos inducida por microondas para su utilización en la obtención de bioplásticos
… be easily metabolized by bacteria to produce bioplastics. The work conducted for this Thesis has been focused on optimizing the production process of synthesis gas (syngas) from different organic residues by means of a novel technology, microwave-induced pyrolysis as an alternative to the …
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