Book Chapters

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Browsing Book Chapters by browse.metadata.impactarea "CeNAM"

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    Active nanocomposite films based on low density polyethylene/organically modified layered bouble hydroxides/thyme oil to retain retail shelf life and quality of hass avocados
    (2020-11) Kesavan Pillai, Sreejarani; Sivakumar, D; Ray, SS; Obianom, P; Eggers, SK; Mhlabeni, T
    In this study, the ability of an active film containing volatile bioactives in post-harvest disease control and preservation of quality in avocados is explored as a non-traditional treatment method. Antimicrobial transparent flexible trilayer low density polyethylene (LDPE) films containing organically modified layered double hydroxides (OLDH) and plant bioactive-thyme oil (TO) were made using single step blown film extrusion. Antifungal effects of the packaging in comparison to commercial treatment and untreated control showed considerable reduction in anthracnose disease events in ‘Hass’ cultivar of avocados while improving the fruit quality. 2wt% OLDH loading improved the oxygen and moisture barrier properties while not affecting the transparency of the film. The results suggest that the synergistic effect of barrier and antimicrobial properties of the controlled volatile bioactive release of the nanocomposite film can be utilised as a prospective strategy to modify the headspace gas composition to combat anthracnose disease in avocados.
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    Collagen-Based Hybrid Piezoelectric Material
    (John Wiley & Sons, Inc, 2024-04) Ghosh, A; Ray, Suprakas S; Orasugh, Jonathan T; Chattopadhyay, D; Ul-Islam, S; Wazed Ali, S; Bairagi, S
    Piezoelectricity, a bidirectional electromechanical coupling, has an extensive range of functions, such as energy harvesters, biomedical devices, sensors, cars, etc. A considerable amount of research has been conducted to investigate this phenomenon's energy harvesting potential. Traditional piezoelectric inorganics have high piezoelectric outputs but are frequently brittle and inflexible and may contain dangerous substances such as mercury or other heavy metals which are toxic to humans as well as other animals. Biological piezoelectric materials, on the other hand, are biodegradable, biocompatible, bioabsorbable, sustainable, non-cytotoxic, as well as facile to fabricate. As a result, they are valuable for a large number of applications, including tissue engineering, biological research, and energy harvesting. The rationale of this chapter is to describe the basis of piezoelectricity in collagen-based biological as well as non-biological hybrid materials, as well as the research involved in those materials as per literature, along with their uses and limitations.
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    Durable PLA Bioplastics
    (Elsevier, 2024) Sinha Roy, Jayita; Ray, Suprakas S
    Bioplastics are special plastics manufactured from biobased polymers and can potentially contribute to the circular plastics economy. In this direction, polylactic acid or polylactide (both abbreviated as PLA) is the most important commercially available polymer whose monomeric unit, lactic acid, can be produced from renewable resources. PLA has good thermal plasticity and mechanical properties and can be readily molded. During the manufacturing of PLA-based plastic products, the carbon footprint is approximately 75% lower than that of conventional plastic products. In the context of life cycle assessment and the eco-profile (input and output from the manufacturing process) of PLA, benefits and drawbacks, strategies for overcoming the drawbacks, and the trend of applications, it is worthy to develop PLA-based durable products considering regenerative technical approach. Therefore, this chapter reports recent progress in developing durable PLA bioplastics for various applications. Various strategies have been critically summarized, such as plasticization, copolymerization, and melt blending with different tough polymers, rubbers, thermoplastic elastomers, and nanomaterials. Changing the processing technology, modification of PLA by chemical methods or cross-linking and grafting, and annealing can improve the properties of PLA, which are also discussed in this chapter.
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    Glass fibres - Production, structure, and applications
    (Elsevier, 2024) Orasugh, Jonathan T; Roy, S; Ray, Suprakas S; Chattopadhyay, D; Mondal, Md. IH
    One of the most adaptable industrial materials available today is “glass fibres (GFs)”: they are easily made from raw infinitely abundant ingredients. Glass fibre made of silica has a long history. Common glass fibres are available in a variety of chemical compositions. The majority of glass fibres are silica-based (50–60% SiO2) and include a variety of additional oxides, including those of calcium, boron, sodium, aluminum, iron, and others. The letters E and C stand for electrical, corrosion/chemical, and high silica content, respectively. S denotes high silica content: S-glass can endure higher temperatures compared to its counterparts in addition to being a great electrical insulator, excellent strength, and a reasonable Young's modulus. Glass fibres are utilized to create printed circuit boards, structural composites, etc. This chapter discusses briefly, glass fibres history, its production, structure, applications, challenges, and ways forwards and then a concise conclusion is drawn.