Article
Polymer Science
Ajithram Arivendan, Winowlin Jappes Jebas Thangiah, Dawood Ahmed Desai
Summary: This study examines the properties of short ramie fibres and epoxy polymer composites reinforced with different lengths of short ramie fibres. The results show that using 20 mm ramie fibres can significantly enhance the performance of commercial particleboard applications.
IRANIAN POLYMER JOURNAL
(2023)
Article
Chemistry, Applied
Maocheng Ji, Jianyong Li, Fangyi Li, Xiaojie Wang, Jia Man, Jianfeng Li, Chuanwei Zhang, Sixian Peng
Summary: By adding ramie fibre and lignin to the chitosan-based film, significant improvements in mechanical, water resistance, thermal, and antioxidant properties were observed. The composite films showed better food preservation effects, indicating the great potential of chitosan-based films in food packaging.
CARBOHYDRATE POLYMERS
(2022)
Article
Polymer Science
Durvasulu Rajesh, Nagarajan Lenin, Robert Cep, Palanivel Anand, Muniyandy Elangovan
Summary: Modern research is focused on finding natural, green, and sustainable materials to replace conventional materials. Natural fiber composites, which have beneficial qualities, are being extensively studied. This research develops a hybrid flax fiber reinforced with phenol-formaldehyde resin and ramie fiber through a vacuum infusion process. The study finds that the fabrication technique affects the adhesion between the matrix and reinforcement. Results show that composites with ramie as the sheath layer and flax as the core exhibit better mechanical characteristics. Laminate H demonstrates the highest mechanical properties among the eight laminates produced for this study. Morphological analysis reveals few defects in the laminate after testing. The developed composites demonstrate superior mechanical properties compared to commercial composites available on the market.
Article
Engineering, Multidisciplinary
Winifred Obande, Danijela Stankovic, Ankur Bajpai, Machar Devine, Christian Wurzer, Anna Lykkeberg, Jennifer A. Garden, Conchur M. O. Bradaigh, Dipa Ray
Summary: Thermal reshaping was used to simulate the end-of-life reuse of liquid-resin-infused thermoplastic acrylic composite laminates, and its effects on mechanical performance and microstructure were studied. Reprocessed laminates showed up to 13% higher flexural strengths compared to the original references. This study provides insights for the practical reuse and re-application of sustainable composites in a circular economy.
COMPOSITES PART B-ENGINEERING
(2023)
Article
Materials Science, Composites
Anni Wang, Peng Yin, Xiaogang Liu, Guijun Xian
Summary: Ramie fiber-reinforced polymer (RFRP) composites were studied under hydrothermal conditions to understand the influence of different resin matrices on their mechanical properties and durability. The study found that RFRP composites reinforced with phenolic resin (RFRPR) had better flexural and short-beam strength, while composites reinforced with unsaturated polyester (RFRUP) had higher water absorption and diffusion coefficients. The erosion of water molecules led to deterioration in the interfacial bonding performance of the RFRPR composite. This study lays the foundation for further promotion and application of RFRP composites.
POLYMER COMPOSITES
(2023)
Review
Engineering, Multidisciplinary
Winifred Obande, Conchur M. O. Bradaigh, Dipa Ray
Summary: The increasing demand for lightweight materials is driving steady growth in the continuous fibre-reinforced polymer composite industry. Research focus has shifted towards addressing end-of-life challenges posed by thermoset matrices, as thermoplastics still face challenges in reaching the same level of technological maturity.
COMPOSITES PART B-ENGINEERING
(2021)
Article
Engineering, Environmental
Pandeng Li, Cheng Hao, Huihui Wang, Tian He, Tong Shu, Cong Li, Longjiang Yu, Ning Yan
Summary: This study developed a high-performance ramie yarn-reinforced polyimine vitrimer composite (RY-PI) that can be chemically and physically recycled, with excellent mechanical and plasticity properties. RY-PI has high tensile strength and can replace most natural fiber-reinforced plastic composites available in the market. It is also lightweight, solvent-resistant, and moisture-proof. This material has high recyclability and promising potential as an environmentally-friendly alternative.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Construction & Building Technology
Mylene M. Vieira, Sergio H. P. Cavalaro, Antonio Aguado, Dimas A. S. Rambo, Renan P. Salvador
Summary: This study investigated the surface corrosion of steel fibres in high-performance fibre reinforced cementitious composites from a quantitative standpoint. The experiment involved different mixtures of short straight steel fibres and wetting-drying cycles in a 5% NaCl solution. Results showed the formation of corrosion spots on specimen surface, but no significant reduction on the post-cracking response.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Polymer Science
Velumayil Ramesh, Krishnasamy Karthik, Robert Cep, Muniyandy Elangovan
Summary: This study investigated the mechanical properties of basalt/ramie/polyester hybrid composite laminates. A matrix of 45% polyester was used for good bonding properties. The laminates were fabricated using a hand layup technique, with different stacking sequences and impregnated in the polyester matrix. Mechanical characterization tests were conducted and results showed that sample number seven with stacking sequence BRBRBRB had the highest strength and hardness. Natural fiber-reinforced composites are increasingly used in the automotive industry, particularly in electric vehicles.
Article
Chemistry, Multidisciplinary
Sarah Kirchhecker, Ngoc Nguyen, Stefan Reichert, Karola Luetzow, Paul Eselem S. Bungu, Axel Jacobi von Wangelin, Sebastian Sandl, Axel T. Neffe
Summary: The combination of inexpensive Fe(ii) acetate with low molecular weight aliphatic carboxamides in situ generates an effective catalyst system for the ring opening polymerisation of lactones. PLLAs with high molar masses, narrow dispersity, and without racemisation were successfully produced. Furthermore, the synthesis of PLLA-PCL block copolymers with low randomness was achieved. This catalyst mixture has the potential to be used in polymers with biomedical applications.
Article
Materials Science, Composites
Delphin Pantaloni, Anton Loic Rudolph, Darshil U. Shah, Christophe Baley, Alain Bourmaud
Summary: The study suggests that replacing glass fibers with flax fibers in thermoset composite materials can reduce ecological impact, and using a biodegradable thermoplastic matrix enables recycling and composting. Investigating the interface between flax fibers and biodegradable matrices reveals that their mechanical properties may be comparable to or better than traditional benchmarks. The adhesion between fibers and matrices plays a significant role in the performance of biocomposites.
COMPOSITES SCIENCE AND TECHNOLOGY
(2021)
Article
Agricultural Engineering
Xu-Chen Jiang, Ping Li, Yun Liu, Yuan-Wei Yan, Ping Zhu
Summary: In this study, ammonium polyphosphate (APP) was coated on the surface of ramie fabrics (RFs) to obtain flame-retardant RF reinforced epoxy resin composites. The flameretardant composites achieved a limiting oxygen index of 33.8% and UL-94 V-0 rating when the weight gain rate of APP in RFs was about 20%. Additionally, the flame-retardant composites showed reduced peak heat release rate, total heat release values, and smoke production. However, the presence of APP had a negative effect on the internal compatibility and mechanical properties of the composites.
INDUSTRIAL CROPS AND PRODUCTS
(2023)
Article
Mechanics
Patricia Lucia Zumaquero, Elena Correa, Jesus Justo, Federico Paris
Summary: The study of failure mechanisms in long fiber reinforced composites is crucial for structural design, particularly in understanding transverse damage mechanisms. Experimental results show that secondary tension does not significantly affect failure stress, while secondary compression may accelerate failure.
COMPOSITE STRUCTURES
(2022)
Article
Polymer Science
Jian Zhou, Xian Zhang, Shicheng Zhao, Chunlin Ye, Zhenfei Zhang, Zhong Xin
Summary: Polyhedral oligomeric silsesquioxanes (POSS)/ultrahigh molecular weight polyethylene (UHMWPE) composites were produced by in-situ polymerization, and the effects of POSS on the entanglement degree, crystallization temperature, and glass transition temperature of UHMWPE were studied. The results showed that the addition of POSS can induce the disentanglement of UHMWPE, with an optimal content of 1.89 wt‰. POSS can act as a nucleating agent and a plasticizer to affect the properties of the composites.
JOURNAL OF POLYMER RESEARCH
(2022)
Article
Polymer Science
Ilaria Papa, Alessia Teresa Silvestri, Maria Rosaria Ricciardi, Valentina Lopresto, Antonino Squillace
Summary: This study focused on manufacturing composite material laminates using the Markforged continuous filament fabrication technique with carbon nanofiber matrix infilled Onyx. Various samples were tested to evaluate the influence of fibers on mechanical properties of composites and the effect of process parameters on 3D-printed sample quality and mechanical behavior through tests such as SEM analysis, tensile and compression tests, and thermogravimetric analysis.
