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Development of Gelatin-Based Active Packaging and Its Application in Bread Preservation

Journal of Renewable Materials 2023年第10期11卷 3693-3709页

作者： Hui Zheng Xiaohan Chen Li Li Dawei Qi Jiale Wang Jiaying Lou Wenjun Wang Shanghai Tobacco Group Co. Ltd.Shanghai200082China College of Food Science and Technology Shanghai Ocean UniversityShanghai201306China

The issue of plastic pollution has attracted widespread social *** is valued as a degradable bio-based material,especially as an edible active packaging ***,the commonly used solution-casting filmforming technology limits the mass production of gelatin *** order to improve the production efficiency and enhance the commercial value of gelatin films,in this study,fish gelatin(FG)particles were successfully blended with essential oils(EOs)to prepare active films by melt extrusion technique,a common method for commercial plastics,and applied to bread *** and EOs showed good compatibility with each *** elongation at break was enhanced in all samples of films containing *** addition of EOs weakened the oxygen barrier properties of the FG *** gelatin films containing clove EO showed the highest DPPH radical scavenging rate of 39.38%.The films containing oregano EO showed the highest antibacterial activity,with 98.84%and 99.86% against *** and ***,*** bread preservation results showed a slower microbial growth rate in the samples preserved by the active *** bread samples preserved in commercial PE film showed mold on day 3,and the bread samples preserved in active gelatin film showed mold visible to the naked eye by day *** study demonstrates the potential of gelatin-based activated films for commercial application in baked goods preservation.

关键词： Fish gelatin film essential oils melt extrusion bread preservation

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Morphological, Structural, Thermal and Tensile Properties of High Density Polyethylene Composites Reinforced with Treated Argan Nut Shell Particles

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Journal of Bionic Engineering 2015年第1期12卷 129-141页

作者： Hamid Essabir Mounir EI Achaby EI Moukhtar Hilali Rachid Bouhfid AbouEIkacem Qaiss Moroccan Foundation for Advanced Science Innovation and Research (MAScIR) Institute of Nanomaterials and Nanotechnology (NANOTECH) Laboratory of Polymer Processing Rabat Morocco National School of Applied Sciences Ibn Zohr University Laboratory Mechanics Processes Energy and Environment Agadir Morocco

High Density Polyethylene （HDPE） composites reinforced with treated bio-filler from Argan-Nut Shell （ANS） at various filler contents are prepared by extrusion and injection molding processes. The microstructures of the composites are charac- terized by Fourier Transform Infrared Spectroscopy （FTIS） and Scanning Electron Microscopy （SEM）; the thermal stability is analyzed by Thermogravimetric Analysis （TGA）, and their mechanical properties are investigated by dynamical mechanical analysis and rheological testing. The morphological and structural results indicate an improvement in adhesion between the ANS fillers and HDPE matrix upon alkali treatment. The mechanical properties of the composites show a significant increase in young＇s modulus with the addition of filler, a gain of 58% is marked compared to neat polymer, Thermal analysis reveals that the incorporation of bio-filler in polymer results in a decrease in decomposition temperatures. This research offers an ecological alternative to upgrade the valorization of abundant and unexploited Moroccan resources. In addition, the possibility of finding uses for ANS in composite manufacturing will help open new markets for what is normally considered waste or for use in low value products.

关键词： argan tree argan nut shell particles polymer composite melt extrusion mechanical properties

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Fabrication and Characterization of Semi-Crystalline and Amorphous Dielectric Polymer Films for Energy Storage

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Materials Sciences and Applications 2022年第11期13卷 559-568页

作者： Hakeem Ayornu Sohail Anwar Yash Thakur Department of Engineering Penn State Altoona Altoona USA Department of Electrical Engineering and Materials Research Institute The Pennsylvania State University University Park USA

Dielectric polymer films are energy storage materials that are used in pulse power operations, power electronics and sustainable energy applications. This paper reviews energy storage devices with focus on dielectric film capacitors. Two prominent examples of polymer dielectrics Polyetherimide (PEI) and Poly (tetrafluoroethylene-hexafluoropropylene-vinylidene fluoride) (THV) have been discussed. Polyetherimide (PEI) is an amorphous polymer recognized for its high-temperature capability, low dielectric loss and high dielectric strength. THV is a semi-crystalline polymer with high dielectric constant, high-temperature capability and charge-discharge efficiency. The primary focus of this paper is to introduce the reader to the fabrication procedures and characterization techniques used in research labs for processing of dielectric polymers. The fabrication and characterization process of both polymers has been discussed in detail to shed the light on experimental process in this area of research.

关键词： Dielectric Polymer Film Capacitor Amorphous Semi-Crystalline Solution-Cast melt extrusion

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