Composite Materials for Sustainable Eco-Friendly Applications: Poster Session
Sponsored by: TMS Structural Materials Division, TMS: Composite Materials Committee
Program Organizers: Brian Wisner, Ohio University; Ioannis Mastorakos, Clarkson University; Simona Hunyadi Murph, Savannah River National Laboratory
Monday 5:30 PM
February 28, 2022
Room: Exhibit Hall C
Location: Anaheim Convention Center
Session Chair: Brian Wisner, Ohio University
D-9: Effect of Thermal Conductivity on the Mechanical Behavior of Marginal Construction Waste as a Structural Material for Recycled Pavements: Liliana Hernandez Garcia1; Henry Colorado1; 1Universidad de Antioquia
The treatment of marginal construction and demolition waste with cementitious materials facilitates is reused as a material for pavement structures that have the capacity to withstand cyclical traffic loads. However, its interaction between the subgrade and the climate brings about effects on the mechanical resistance associated with the gradients of temperature and humidity, such as the alteration in the maturity of the material, where the development of resistance is greater in hot climates than in low temperatures. These results in the development of tensile and compressive stresses due to contraction and thermal expansion can reduce the durability of structures. By using excavation residues from the La Fiscala Mine in Bogotá Colombia, this research identifies the relationship between the thermal conductivity of the material with the compaction, humidity and plasticity. Thus, it is possible to determine the performance of the material as a structure in different environmental conditions.
D-10: The Response of Epoxy Hybrid Composites with Aramid Fabric and Curaua Non-Woven Fabric to Dynamic Compression at High Strain Rate: Natalin Meliande1; Rafael Dias2; Wendell Bruno Bezerra1; Sergio Monteiro1; Lucio Nascimento1; 1IME; 2CTEx
The increasing awareness around the world of the urgent need to reduce the use of non-degradable synthetic materials, and the disposing problem of ballistic vests and helmets have driven research into new, more socio-environmentally sustainable materials for ballistic application. In this context, natural lignocellulosic fibers (LNFs) can be promising options because they are socio and ecofriendily and have specific mechanical properties comparable to commonly used synthetic fibers, besides to being significantly cheaper. For applications under high strain rate compression loadings as ballistic impact, the material response varies significantly as compared to static loading. Thus, as the objective of evaluating the hybridization of curaua fibers (Ananas Erectifolius) with aramid fibers in epoxy composites for ballistic helmets, dynamic compression tests with split Hopkinson pressure bar (SHPB), under about 1400s-1 deformation rates, were performed. Dynamic stress-strain plot was obtained for each composite from which mechanical properties at high strain rates are extracted.
Cancelled
D-12: Removal of Fluoride from Aqueous Solution by NH2-MIL-101(Al): Xinhui Liu1; Wenjuan Wang1; Guihong Han1; Yanfang Huang1; Bingbing Liu1; Shengpeng Su1; 1Zhengzhou University
The development of fluoride adsorbents with abundant binding sites and high affinity has been a critical challenge in wastewater treatment. In this work, the amine functionalized metal-organic frameworks（NH2-MIL-101(Al)）synthesized by solvothermal method were employed to remove fluoride from aqueous solution. The effects of different parameters including solution pH value, contact time, initial fluoride concentration and adsorbent dose on adsorption capacity were comprehensively investigated. These findings demonstrated that NH2-MIL-101(Al) exhibited excellent property for the removal of fluoride with maximum removal rate of 93.4% under the optimum condition, and the residual concentration of fluoride was 0.66 mg•L-1. Experimental results indicated that the NH2-MIL-101(Al) could be recognized as an efficient adsorbent for fluoride removal from aqueous solution and has great application prospects.
Cancelled
D-13: Study on the Application of Modified MOFs to the Treatment of Simulated Metallurgical Wastewater: Junpeng Zuo1; guihong han1; wenjuan wang1; yanfang huang1; bingbing liu1; Shengpeng Su1; 1Zhengzhou University
Cr(Ⅵ) anions contained in metallurgical wastewater threaten water environment. It is very urgent to explore effective method to remove Cr(Ⅵ) anions. In this work, modified MOFs were prepared by hydrothermal synthesis method. The effect of modified MOFs on the removal of Cr(Ⅵ) anions were researched. The effects of different factors on the removal efficiencies of Cr(Ⅵ) anions including solution pH, adsorbent dosage and contact time were comprehensively investigated, and the optimized adsorption conditions were obtained. The results show the optimum adsorption rate of Cr2O72- solution reached 87.81% when the pH was 3 and the contact time was 3 h. The experimental results indicated that the efficient removal of Cr(Ⅵ) anions from metallurgical wastewater are realized. This study shows that modified MOF is a promising material for wastewater treatment.
D-14: The Response of Epoxy Hybrid Composites with Aramid Fabric and Curaua Non-Woven Fabric to Ballistic Impact by 9mm FMJ Luger Projectile: Natalin Meliande1; Filipe Balbino2; Wendell Bruno Bezerra1; Sergio Monteiro1; Lucio Nascimento1; 1IME; 2CAEx
The increasing awareness around the world of the urgent need to reduce the use of non-degradable synthetic materials, and the disposing problem of ballistic vests and helmets have driven research into new, more socio-environmentally sustainable materials for ballistic application. In this context, natural lignocellulosic fibers (LNFs) can be promising options because they are socio and ecofriendly and have specific mechanical properties comparable to commonly used synthetic fibers, in addition to being significantly cheaper. Thus, as the objective of evaluating the effect of hybridization of curaua fibers (Ananas Erectifolius) with aramid fibers in epoxy composites for ballistic helmets, ballistic impact tests were performed with 9mm FMJ Luger projectile. The projectile velocity was varied round to round by adjusting the propellant mass. The velocities immediately before and after the impact were measured with a Doppler Radar Antenna combined with a computer in order to estimate and compare the composites ballistic limit.
D-15: Thermal Aging Evaluation of Epoxy Composites Reinforced with Fique Fabric Using Thermogravimetric Analyses: Michelle Oliveira1; Elisa de Brito2; Foluke de Assis3; Fernanda da Luz1; Sergio Monteiro1; Wendell Bezerra1; 1Military Institute Of Engineering; 2Institute of Macromolecules Professor Eloisa Mano (IMA); 3Navy Research Institute (IPqM)
The knowledge of the thermal stability of natural fibers and lignocellulosic materials is an important factor in using these materials from natural sources as reinforcement in polymeric matrices. These materials have low resistance to thermal degradation mainly caused by the presence of volatile species that ignite at low temperatures. Characteristics of this nature significantly contribute to limiting the use of such materials in situations that require higher temperatures. In this work, the thermal degradation at 170°C of fique fabric and its composites, exposed to high temperature for 72, 120 and 240 hours, and evaluated by thermogravimetric measurements. Damage to fiber/matrix and microcrack interfaces was also observed from scanning electron microscopy.
D-16: Utilizing Spent Espresso Grounds for Composite Filaments with Improved Thermal Properties: Shardai Johnson1; Vijaya Rangari1; 1Tuskegee University
Global consumption of coffee is over 11 million metric tons annually which produces an exuberant amount of carbon rich biomass. To reclaim the spent grounds, this research demonstrates a simplistic method to structurally tune carbon black as a filler for a recyclable polymer. Spent espresso grounds (SEG) are treated with 5% metal salt and then pyrolyzed at 15℃ per minute up to 1000℃ with an isotherm of three hours. After removal of catalyst, filler is mechanically mixed with polymer in solution for adequate distribution of particles. After mixture is dried and pelletized, the composite pellets are extruded into a filament. After mechanical and thermal characterization, filaments demonstrated significant increase in thermal stability with relative mechanical properties compared to the neat polymer filaments.