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  • Open Access

    ARTICLE

    Body Temperature Programmable Shape Memory Thermoplastic Rubber

    Taoxi Wang1, Zhuo Liu1,2, Fu Jian1, Xing Shen1, Chen Wang1, Huwei Bian3, Tao Jiang3,*, Wei Min Huang4

    Journal of Polymer Materials, Vol.42, No.1, pp. 81-94, 2025, DOI:10.32604/jpm.2025.061047 - 27 March 2025

    Abstract This paper presents the development of a thermoplastic shape memory rubber that can be programmed at human body temperature for comfortable fitting applications. We hybridized commercially available thermoplastic rubber (TPR) used in the footwear industry with un-crosslinked polycaprolactone (PCL) to create two samples, namely TP6040 and TP7030. The shape memory behavior, elasticity, and thermo-mechanical response of these rubbers were systematically investigated. The experimental results demonstrated outstanding shape memory performance, with both samples achieving shape fixity ratios (Rf) and shape recovery ratios (Rr) exceeding 94%. TP6040 exhibited a fitting time of 80 s at body temperature (37°C), More >

  • Open Access

    ARTICLE

    Advanced Poly(Lactic Acid)/Thermoplastic Polyurethane Blend-Based Nanocomposites with Carbon Nanotubes and Graphene Nanoplatelets for Shape Memory

    Nayara Koba de Moura Morgado, Guilherme Ferreira de Melo Morgado, Erick Gabriel Ribeiro dos Anjos, Fabio Roberto Passador*

    Journal of Polymer Materials, Vol.42, No.1, pp. 95-110, 2025, DOI:10.32604/jpm.2025.059364 - 27 March 2025

    Abstract The continuous improvement in patient care and recovery is driving the development of innovative materials for medical applications. Medical sutures, essential for securing implants and closing deep wounds, have evolved to incorporate smart materials capable of responding to various stimuli. This study explores the potential of thermoresponsive sutures, made from shape memory materials, that contract upon heating to bring loose stitches closer together, promoting optimal wound closure. We developed nanocomposites based on a blend of poly(lactic acid) (PLA) and thermoplastic polyurethane (TPU)—biopolymers that inherently exhibit shape memory—enhanced with carbon nanotubes (CNT) and graphene nanoplatelets (GN)… More >

  • Open Access

    ARTICLE

    From Waste to Biopolymer: Synthesis of P(3HB-co-4HB) from Renewable Fish Oil

    Tatiana Volova1,2, Natalia Zhila1,2,*, Kristina Sapozhnikova1,2, Olga Menshikova1,2, Evgeniy Kiselev1,2, Alexey Sukovatyi1,2, Vladimir Volkov3, Ivan Peterson4, Natalia Ipatova1,2, Ekaterina Shishatskaya1,2

    Journal of Renewable Materials, Vol.13, No.3, pp. 413-432, 2025, DOI:10.32604/jrm.2024.058775 - 20 March 2025

    Abstract The article presents the results of a study on the possibility of synthesizing biodegradable poly(3-hydroxybutyrate-co-4-hydroxybutyrate) [P(3HB-co-4HB)] from renewable waste fish oil (WFO) by the Cupriavidus necator B-10646 bacterium. For the first time, waste oil generated during the processing of Sprattus balticus in the production of sprats was used as the main carbon substrate for the synthesis of P(3HB-co-4HB), and ε-caprolactone was used as a precursor instead of the more expensive γ-butyrolactone. Samples of P(3HB-co-4HB) with a 4HB monomer content from 7.4 to 11.6 mol.% were synthesized, and values of the bacterial biomass yield and the total yield of the… More > Graphic Abstract

    From Waste to Biopolymer: Synthesis of P(3HB-<i>co</i>-4HB) from Renewable Fish Oil

  • Open Access

    REVIEW

    Biobased Biodegradable Polybutylene Succinate Polymers and Composites: Synthesis, Structure Properties and Applications—A Review

    Peter Ramashadi Makgwane1,2,*, Sudhakar Muniyasamy1,3,*, Lerato Hlekelele1, Andri Swanepoel1, Venkata Satyanarayana Sypu1, Lindani Mdlalose1, Saloshnee Naidoo1, Zamani Cele1, Arjun Maity1,4, Mohammed Balogun1, Orebotse Joseph Botlhoko5

    Journal of Renewable Materials, Vol.13, No.3, pp. 449-495, 2025, DOI:10.32604/jrm.2025.027523 - 20 March 2025

    Abstract The materialization of polybutylene succinate (PBS) belongs to the family of polyesters which are degradable and biodegradable, their biodegradability properties have attracted enormous interest for product development towards different polymer-based applications. Besides its biodegradability, PBS can be derived from petroleum and biobased monomers. At the same time, the latter is the driving factor for its growing interest in bioplastics for fully green and sustainable biobased-derived polymer products. The processes and techniques presented herein, are based on the production of biobased succinic acid monomer to PBS. However, the counterpart biobased monomer 1,4-butanediol (1,4-BDO) production has not… More > Graphic Abstract

    Biobased Biodegradable Polybutylene Succinate Polymers and Composites: Synthesis, Structure Properties and Applications—A Review

  • Open Access

    REVIEW

    A Comprehensive Review of Natural Fibers: Bio-Based Constituents for Advancing Sustainable Materials Technology

    Sachin Ghalme1,*, Mohammad Hayat2, Mahesh Harne3

    Journal of Renewable Materials, Vol.13, No.2, pp. 273-295, 2025, DOI:10.32604/jrm.2024.056275 - 20 February 2025

    Abstract With growing concerns for global warming and environmental issues, the research community has contributed significantly to green technology in the area of material science through the development of natural fiber-reinforced polymer composites (NFRPC). Polymers serve as the matrix in NFRPC, while natural fibers serve as the reinforcing materials. Demand for high-performing materials made with natural resources is growing continuously. Natural fiber-reinforced polymer composites are sustainable biocomposites fabricated with natural fibers embedded with a polymer matrix. They offer a wide range of advantages, including a low weight-to-strength ratio, high flexural strength, damping properties, and resistance… More > Graphic Abstract

    A Comprehensive Review of Natural Fibers: Bio-Based Constituents for Advancing Sustainable Materials Technology

  • Open Access

    PROCEEDINGS

    Mechanics of Shape-Locking-Governed R2G Adhesion with Shape Memory Polymers

    Changhong Linghu1,*, Huajian Gao1,2, K. Jimmy Hsia1,3

    The International Conference on Computational & Experimental Engineering and Sciences, Vol.32, No.2, pp. 1-2, 2024, DOI:10.32604/icces.2024.011590

    Abstract Shape memory polymers (SMPs), with unique properties such as tunable elastic modulus, temporary shape-locking, and shape-recovery upon external stimulations, are emerging as a new class of smart materials with switchable adhesion capabilities. A prominent feature of the adhesion between SMP and a spherical indenter is the so-called R2G adhesion, defined as making contact in the rubbery state to a certain indentation depth followed by detachment in the glassy state. While it has been demonstrated that the R2G adhesion with SMPs can achieve orders of magnitude higher adhesive strength compared to conventional elastic adhesive systems, the… More >

  • Open Access

    ARTICLE

    Vanillin Based Polymers: VI. Poly(hydrovanilloin-furfural) and Poly(hydrovanilloin-5-hydroxymethylfurfural)

    Ananda S. Amarasekara1,2,*, Gabriel Murillo Morales1,2, Raghava R. Kommalapati2,3

    Journal of Renewable Materials, Vol.12, No.9, pp. 1495-1506, 2024, DOI:10.32604/jrm.2024.052373 - 25 September 2024

    Abstract Renewable resources based polymers provides a sustainable alternative to petroleum derived polymeric materials. As a part of our series on synthesis of vanillin based renewable polymers, we report the synthesis of poly(hydrovanilloin-furfural) [poly(HVL-Fur)] and poly(hydrovanilloin–5-hydromethylfurfural) [poly(HVL-5-HMF)]. Vanillin was dimerized to a mixtures of meso/DL-hydrovanilloins with 94% meso product by electrochemical reductive coupling in aqueous sodium hydroxide using lead electrodes in quantitative yield. Then sodium hydroxide catalyzed condensation of hydrovanilloin with furfural in water at 80°C for 72 h was used to synthesize poly(HVL-Fur) with Mw = 8600 g mol−1, PDI = 1.28 in 78% yield. Similarly, condensation of hydrovanilloin More > Graphic Abstract

    Vanillin Based Polymers: VI. <i>Poly</i>(hydrovanilloin-furfural) and <i>Poly</i>(hydrovanilloin-5-hydroxymethylfurfural)

  • Open Access

    ARTICLE

    Artificial Intelligence Prediction of One-Part Geopolymer Compressive Strength for Sustainable Concrete

    Mohamed Abdel-Mongy1, Mudassir Iqbal2, M. Farag3, Ahmed. M. Yosri1,*, Fahad Alsharari1, Saif Eldeen A. S. Yousef4

    CMES-Computer Modeling in Engineering & Sciences, Vol.141, No.1, pp. 525-543, 2024, DOI:10.32604/cmes.2024.052505 - 20 August 2024

    Abstract Alkali-activated materials/geopolymer (AAMs), due to their low carbon emission content, have been the focus of recent studies on ecological concrete. In terms of performance, fly ash and slag are preferred materials for precursors for developing a one-part geopolymer. However, determining the optimum content of the input parameters to obtain adequate performance is quite challenging and scarcely reported. Therefore, in this study, machine learning methods such as artificial neural networks (ANN) and gene expression programming (GEP) models were developed using MATLAB and GeneXprotools, respectively, for the prediction of compressive strength under variable input materials and content… More >

  • Open Access

    ARTICLE

    Enhancing Canola Yield and Photosynthesis under Water Stress with Hydrogel Polymers

    Elham A. Badr1, Gehan Sh. Bakhoum1, Mervat Sh. Sadak2, Ibrahim Al-Ashkar3, Mohammad Sohidul Islam4, Ayman El Sabagh5,6,*, Magdi T. Abdelhamid2,7,*

    Phyton-International Journal of Experimental Botany, Vol.93, No.7, pp. 1623-1645, 2024, DOI:10.32604/phyton.2024.054453 - 30 July 2024

    Abstract While Egypt’s canola production per unit area has recently grown, productivity remains low, necessitating increased productivity. Hydrogels are water-absorbent polymer compounds that can optimize irrigation schedules by increasing the soil’s ability to retain water. Accordingly, two field experiments were conducted to examine hydrogel application to sandy soil on canola growth, biochemical aspects, yield, yield traits, and nutritional quality of yielded seeds grown under water deficit stress conditions. The experiments were conducted by arranging a split-plot layout in a randomized complete block design (RCBD) with three times replications of each treatment. While water stress at 75%… More >

  • Open Access

    REVIEW

    Renewable Polymers in Biomedical Applications: From the Bench to the Market

    Rauany Cristina Lopes1, Tamires Nossa2, Wilton Rogério Lustri1, Gabriel Lombardo3,4,5, Maria Inés Errea3,4, Eliane Trovatti1,*

    Journal of Renewable Materials, Vol.12, No.4, pp. 643-666, 2024, DOI:10.32604/jrm.2024.048957 - 12 June 2024

    Abstract Polymers from renewable resources have been used for a long time in biomedical applications and found an irreplaceable role in some of them. Their uses have been increasing because of their attractive properties, contributing to the improvement of life quality, mainly in drug release systems and in regenerative medicine. Formulations using natural polymer, nano and microscale particles preparation, composites, blends and chemical modification strategies have been used to improve their properties for clinical application. Although many studies have been carried out with these natural polymers, the way to reach the market is long and only More >

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