Article
Materials Science, Textiles
Marina Gil Almeida Cioffi, Daniel Magalhaes de Oliveira, Anne Shayene Campos de Bomfim, Kelly Cristina Coelho de Carvalho Benini, Maria Odila Hilario Cioffi, Herman Jacobus Cornelis Voorwald
Summary: The high production of paper has led to an increased focus on paper recycling and its use as a composite filler. This study explores the mechanical and thermal properties of polypropylene composites with different amounts of recycled office waste paper. The results show that the composites maintain comparable properties to pure polypropylene, making them suitable for future applications in various plastic products.
JOURNAL OF NATURAL FIBERS
(2022)
Article
Polymer Science
Sandeep Tamrakar, Rachel Couvreur, Deborah Mielewski, John W. Gillespie Jr, Alper Kiziltas
Summary: The recyclability of nine types of composites with natural and mineral fillers in polypropylene and nylon matrix was studied using injection molding and mechanical grinding. The mechanical properties of natural fiber composites did not significantly degrade after recycling or water absorption tests. However, glass fiber composites showed a decrease in tensile strength and modulus after five rounds of recycling due to severe fiber attrition. Glass bubbles also broke after recycling, causing a decrease in lightweighting ability. Only glass fiber reinforced nylon composites were affected by hygrothermal conditioning, resulting in reduced mechanical properties after water absorption.
POLYMER DEGRADATION AND STABILITY
(2023)
Article
Materials Science, Composites
Lynda Chelali, Ahmed Benaboura
Summary: This work focuses on the preparation and characterization of a new composite material made from a thermoplastic polymer and a vegetal fiber. The aim is to optimize the adhesion between the fiber and the recycled PVC matrix through surface modification. Experimental results showed that the best method for fiber treatment involved an alkaline treatment followed by a reaction with acetic anhydride. The prepared composites with varying proportions of modified agave fibers exhibited improved mechanical, thermal, and morphological properties.
POLYMER COMPOSITES
(2022)
Article
Polymer Science
Mohammadreza Nofar, Beril Saadet Yenigul, Burcu Ozdemir, Ceren Yargici Kovanci, Abbas Ghanbari, Amirjalal Jalali
Summary: In this study, rPE based MFCs were developed by incorporating rPET and rPA as reinforcing fibrillar phases at a given weight ratio. The effects of extrusion and injection molding temperatures on fibrillar structure and properties were explored. EnBAGMA and MAH-g-PE acted as compatibilizers, refining the fibrillar structure and significantly influencing mechanical properties.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Engineering, Manufacturing
Chunhui Jia, Ping Zhang, Seyed Mohsen Seraji, Ruishi Xie, Lin Chen, Dong Liu, Ying Xiong, Hao Chen, Yingke Fu, Hailun Xu, Pingan Song
Summary: This study focuses on the preparation of high thermally conductive polymer composites with ENR/PLA blend as the polymer matrix and BN/GO nano-additive hybrid system. The composites exhibited a significant enhancement in thermal conductivity, recoverable performance, and self-healing effect, providing valuable insights for the application of polymers in electronic devices.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2022)
Article
Materials Science, Composites
Zuhal Yurtbasi, Mustafa Kuyumcu, Gokce Kurt, Alper Kasgoz
Summary: In this study, aluminum dross powders were incorporated into polyoxymethylene to develop value-added products and create an alternative utilization method for industrial waste. The morphological analyses showed various inorganic components in the aluminum dross and no significant structural incompatibility with polyoxymethylene. The addition of aluminum dross improved the mechanical properties and crystallization behavior of the composite samples.
POLYMER COMPOSITES
(2022)
Article
Green & Sustainable Science & Technology
Claudia Sergi, Jacopo Tirillo, Cinzia Iacovacci, Fabrizio Sarasini
Summary: Hybridization of vegetable fibers with basalt fibers allows for the exploitation of the environmental benefits of vegetable fibers while maintaining the mechanical properties of composites. This study investigates the mechanical recycling of flax/basalt hybrid polypropylene composites and compares the results with flax composites. The results show that the interaction between flax and basalt fibers leads to a faster degradation of flax fibers, resulting in a decrease in hybrid mechanical properties after the second recycling cycle.
SUSTAINABLE MATERIALS AND TECHNOLOGIES
(2023)
Article
Materials Science, Composites
Lorena Saitta, Vishnu Prasad, Claudio Tosto, Neal Murphy, Alojz Ivankovic, Gianluca Cicala, Gennaro Scarselli
Summary: The study focuses on composite fabrication, characterization, and recyclability of biobased polymer resins reinforced with flax fiber. By selecting different biobased resins and evaluating their mechanical properties, an epoxy resin cured with a cleavable hardener is found to have the highest glass transition temperature, ensuring full recyclability. The study also demonstrates the possibility of separating and recovering fibers and resin from composite panels through a specific chemical process.
POLYMER COMPOSITES
(2022)
Article
Polymer Science
Kui Wang, Zejun Zhang, Ruijun Cai, Guangyu Sun, Ping Cheng, Yong Peng
Summary: This study investigated the effects of recycling on the mechanical properties of recycled polypropylene (PP)-based composites and aimed to improve the mechanical properties of recycled materials by adjusting the remanufacturing temperature. 3D printing was used as the remanufacturing approach, and the composites were ground and reextruded multiple times to simulate mechanical recycling. The results showed that adjusting the printing temperature improved the mechanical properties of the recycled PP-based composites.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Article
Nanoscience & Nanotechnology
Joshua M. Kubiak, Buxuan Li, Mathew Suazo, Robert J. Macfarlane
Summary: The distribution of filler particles within a polymer matrix nanocomposite significantly affects its properties and processability. This study presents a strategy for preparing functional composites with enhanced thermal conductivity. The thermal cross-linking of self-suspended polymer grafted nanoparticles is used to achieve homogeneously dispersed, non-percolating alumina particles in an organic matrix.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Construction & Building Technology
Zhigang Zhang, Jianqiao Yu, Fengjiang Qin, Feng Sun
Summary: This study developed a highly ductile PE fiber reinforced engineered geopolymer composite (EGC) using metakaolin, and experimentally investigated the mechanical properties of EGC after thermal exposures. The results showed that the compressive strength of EGC increased with temperature up to 140 degrees C, but decreased at 200 degrees C due to voids and micro-cracks. Thermal exposures also refined the microstructures of EGC within 20-140 degrees C. However, exposure temperatures above 400 degrees C resulted in severe cracking and complete loss of strength performance. Under tensile/flexural loadings, EGC exhibited high ductility within 20-140 degrees C, with gradual increase in strength and deformability.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2023)
Article
Construction & Building Technology
P. Aguilera Benito, M. Morales-Segura, D. Caballol, C. Porras-Amores
Summary: A series of gypsum composites with different types of cigarette butt morphologies were developed to evaluate their thermal and acoustic properties. Another set of samples with different surface finishes were also developed to assess the acoustic absorption coefficient. The results showed that the recycled material could serve as a thermal insulator in all morphologies. However, for acoustic purposes, the residue must be placed vertically on the surface to achieve similar values to commercial acoustic absorbers. This indicates the potential for manufacturing a plasterboard using this composite to enhance its properties.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Materials Science, Ceramics
Yizhou Qian, Yujin Wang, Lei Chen, Yu Zhou
Summary: A series of (Ti0.5Nb0.5)C-x wt.% SiC (x = 0, 5, 10, 20) composites with dense microstructures and well-dispersed SiC particles were prepared by spark plasma sintering. The Vickers hardness, Young's modulus, and fracture toughness of the composites increased with the increment of SiC content.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Ceramics
Yuhui Chen, Ruolin Zhang, Shen Hu, Pengyang Jiang, Jiaxiang Sun, Baiqiang Zhang, Yonghai Zhang
Summary: Good fracture toughness can prolong the service life of thermal barrier coatings, and high-entropy ceramics can provide coatings with excellent mechanical properties. In this study, (ZrYTaErTi)O composites with the best fracture toughness were prepared and characterized. The effects of grain size and the introduction of a second phase on the fracture toughness were analyzed. This study provides guidance for future research on improving the mechanical properties of novel thermal barrier coating materials.
CERAMICS INTERNATIONAL
(2023)
Article
Construction & Building Technology
Anam Khan, Ravi Patidar, Asokan Pappu
Summary: Accumulated waste poses a threat to environmental safety, impacting issues such as air pollution, land degradation, and water/soil contamination. Effective recycling and management are essential in overcoming these challenges. Utilizing marble waste as reinforcement in manufacturing composites shows promising potential for creating innovative materials with applications in various fields.
CONSTRUCTION AND BUILDING MATERIALS
(2021)