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  • Open Access

    ARTICLE

    Mechanical and Biological Properties of Chitosan Nanocomposite Films: Effects of POSS nanoparticles

    R. VENKATESAN*, S. R. DARSON IMMANUEL JOHN, N. RAJESWARI

    Journal of Polymer Materials, Vol.36, No.3, pp. 261-273, 2019, DOI:10.32381/JPM.2019.36.03.6

    Abstract Nanocomposite films of chitosan (CH) incorporated with different wt. % of the polyoligomericsilsesquioxane (POSS) were prepared by solution casting. The thermal, mechanical, morphological and antimicrobial properties of the nanocomposites were examined. TGA analyses of the nanocomposites indicate that the filler enables the enhancement of thermal stability of chitosan. The tensile strength of the nanocomposite films is enhanced (10.9 MPa for neat chitosan to 24.0MPa for 5wt. % filled chitosan) by the addition of POSS while the elongation at break is reduced. The nanocomposite films exhibited excellent antimicrobial activity against both gram positive and gram negative More >

  • Open Access

    ARTICLE

    Chitosan/Sodium Alginate Multilayer pH-Sensitive Films Based on Layer-by-Layer Self-Assembly for Intelligent Packaging

    Mingxuan He1, Yahui Zheng1, Jiaming Shen1, Jiawei Shi1, Yongzheng Zhang1, Yinghong Xiao2,*, Jianfei Che1,*

    Journal of Renewable Materials, Vol.12, No.2, pp. 215-233, 2024, DOI:10.32604/jrm.2023.043659

    Abstract

    The abuse of plastic food packaging has brought about severe white pollution issues around the world. Developing green and sustainable biomass packaging is an effective way to solve this problem. Hence, a chitosan/sodium alginate-based multilayer film is fabricated via a layer-by-layer (LBL) self-assembly method. With the help of superior interaction between the layers, the multilayer film possesses excellent mechanical properties (with a tensile strength of 50 MPa). Besides, the film displays outstanding water retention property (blocking moisture of 97.56%) and ultraviolet blocking property. Anthocyanin is introduced into the film to detect the food quality since

    More > Graphic Abstract

    Chitosan/Sodium Alginate Multilayer pH-Sensitive Films Based on Layer-by-Layer Self-Assembly for Intelligent Packaging

  • Open Access

    REVIEW

    Advances in Research of Molded Pulp for Food Packaging

    Yifan Liu1, Shufeng Ma2, Feijie Wang1, Liqiang Wang1,*

    Journal of Renewable Materials, Vol.11, No.11, pp. 3831-3846, 2023, DOI:10.32604/jrm.2023.028251

    Abstract The molded pulp, a product of three-dimensional papermaking technology, is environmentally friendly and has a low environmental impact due to its ability to decompose quickly in the natural environment after disposal. The application of molded pulp for food packaging can replace or reduce the use of plastic food packaging. Researchers extract fibers from plants for the production of safe and hygienic molded pulp for food packaging, and they also study and enhance the qualities of molded pulp to broaden its use in the food industry. This paper reviews the sources and varieties of plant fiber More > Graphic Abstract

    Advances in Research of Molded Pulp for Food Packaging

  • Open Access

    ARTICLE

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

    Hui Zheng1,2, Xiaohan Chen2, Li Li2, Dawei Qi1, Jiale Wang1, Jiaying Lou1,*, Wenjun Wang1,*

    Journal of Renewable Materials, Vol.11, No.10, pp. 3693-3709, 2023, DOI:10.32604/jrm.2023.027748

    Abstract The issue of plastic pollution has attracted widespread social attention. Gelatin is valued as a degradable bio-based material, especially as an edible active packaging material. However, the commonly used solution-casting filmforming technology limits the mass production of gelatin films. In 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 preservation. FG and EOs showed good compatibility with each… More > Graphic Abstract

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

  • Open Access

    ARTICLE

    A Circular Economy Use of Post-Consumer Polypropylene Packaging for Low Thermal Conductive and Fire-Retardant Building Material Applications

    Jakkid Sanetuntikul1, Borwon Narupai2, Nawadon Petchwattana3,*

    Journal of Renewable Materials, Vol.11, No.9, pp. 3567-3582, 2023, DOI:10.32604/jrm.2023.029308

    Abstract Wastes from polypropylene (PP) packages are accumulating every year because it is one of the most widely consumed and short lifecycle products. This paper aims to develop low thermal conductive and fire-retardant materials from post-consumer PP (pPP) packages. Ammonium polyphosphate (APP) and hollow glass microsphere (HGM) were further added to improve the fire retardancy and thermal conductivity of pPP. The influence of APP and HGM on the mechanical and thermal properties, fire retardancy and thermal conductivity of pPP were investigated and compared with that of virgin PP (vPP). HGM was constantly added at 5 wt%… More > Graphic Abstract

    A Circular Economy Use of Post-Consumer Polypropylene Packaging for Low Thermal Conductive and Fire-Retardant Building Material Applications

  • Open Access

    REVIEW

    Cellulose-Based Films for Food Packaging Applications: Review of Preparation, Properties, and Prospects

    Xiaoyan Liu1,2, Zhao Qin1,2,*, Yuxiang Ma1,2, Huamin Liu1,2,*, Xuede Wang1,2

    Journal of Renewable Materials, Vol.11, No.8, pp. 3203-3225, 2023, DOI:10.32604/jrm.2023.027613

    Abstract Packaging is a food preservation technology widely used in the world. Naturally-sourced, biodegradable polymers are becoming increasingly popular in the food packaging sector. Packaging films prepared using cellulose as raw material would contribute to resource sustainability, but the difficulty of cellulose solubilization limits their further development. In view of this, a series of novel solvent systems (LiCl/DMAc, ILs, TBAH/DMSO, NMMO, alkali/urea solutions, metal-complex solutions) were used to prepare high-strength and high-performance cellulose-based films; their characteristics and the mechanisms involved were investigated. Composite films prepared by blending cellulose with various polymers (synthetic polymers, natural polymers, proteins More > Graphic Abstract

    Cellulose-Based Films for Food Packaging Applications: Review of Preparation, Properties, and Prospects

  • Open Access

    ARTICLE

    Cushioning Performance of Hilbert Fractal Sandwich Packaging Structures under Quasi-Static Compressions

    Xingye Xu1, Haiyan Song1,2,*, Lijun Wang1,2

    CMES-Computer Modeling in Engineering & Sciences, Vol.135, No.1, pp. 275-292, 2023, DOI:10.32604/cmes.2022.022637

    Abstract The sandwich structure of cushioning packaging has an important influence on the cushioning performance. Mathematical fractal theory is an important graphic expression. Based on Hilbert fractal theory, a new sandwich structure was designed. The generation mechanism and recurrence formula of the Hilbert fractal were expressed by Lin’s language, and the second-order Hilbert sandwich structure was constructed from thermoplastic polyurethane. The constitutive model of the hyperelastic body was established by using the finite element method. With the unit mass energy absorption as the optimization goal, the fractal sandwich structure was optimized, and the best result was More >

  • Open Access

    ARTICLE

    Surface, Thermal and Antimicrobial Release Properties of Plasma-Treated Zein Films

    S.K. Pankaj1, C. Bueno-Ferrer1, N.N. Misra1, L. O’Neill2, A. Jiménez3, P. Bourke1, P.J. Cullen1,4,*

    Journal of Renewable Materials, Vol.2, No.1, pp. 77-84, 2014, DOI:10.7569/JRM.2013.634129

    Abstract The effects of dielectric barrier discharge plasma treatment on zein fi lm containing thymol as an active ingredient were evaluated. The plasma discharge was optically characterized to identify the reactive species. A signifi cant increase in the fi lm roughness (p < 0.05) was observed due to the etching effect of DBD plasma, which was correlated with the increase in the diffusion rate of thymol in the food simulant. The diffusion of thymol from the zein fi lm was measured in aqueous solution. The kinetics of thymol release followed the Fick’s law of diffusion as More >

  • Open Access

    ARTICLE

    Antibacterial Chitosan-Gelatin Microcapsules Modified with Green-Synthesized Silver Nanoparticles for Food Packaging

    Long Li, Yanan Lu, Yu Chen, Jiayi Bian, Li Wang, Li Li*

    Journal of Renewable Materials, Vol.11, No.1, pp. 291-307, 2023, DOI:10.32604/jrm.2022.021456

    Abstract Silver nanoparticles (Ag NPs) are an effective antibacterial agent, but their application in food packaging is limited due to their easy agglomeration and oxidation. In this study, antibacterial microcapsules were fabricated using Ginkgo biloba essential oil (GBEO) as core material and chitosan and type B gelatin biopolymer as capsule materials. These antibacterial microcapsules were then modified with green-synthesized Ag NPs, blended into the biopolymer polylactic acid (PLA), and finally formed as films. Physicochemical properties and antibacterial activity against Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus) were evaluated. Results showed that the prepared antibacterial PLA films exhibited excellent antibacterial More > Graphic Abstract

    Antibacterial Chitosan-Gelatin Microcapsules Modified with Green-Synthesized Silver Nanoparticles for Food Packaging

  • Open Access

    ARTICLE

    Thermogravimetric and Synergy Analysis of the Co-Pyrolysis of Coconut Husk and Laminated Plastic Packaging for Biofuel Production

    Joselito Olalo*

    Energy Engineering, Vol.119, No.2, pp. 555-567, 2022, DOI:10.32604/EE.2022.018864

    Abstract Unlike plastic, biomass can also be converted and produce high quality of biofuel. Co-pyrolysis of coconut husk (CH) and laminated plastic packaging (LPP) were done in this study. Synergy between these two feedstock was calculated by using thermogravimetric (TGA) and derivative thermogravimetry (DTG) analysis. Different activation energies of the reactions in the co-pyrolysis of CH and LPP were evaluated using the Coats-Redfern method. Results showed an activation energy ranging from 8 to 37 kJ/mol in the different percentage composition of the co-pyrolysis. Also, thermal degradation happens in two-stages in the copyrolysis of CH and LPP, More >

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