Composite Materials for Sustainable Eco-Friendly Applications: Eco-Friendly Composite Materials-Recycled Materials
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

Wednesday 2:00 PM
March 2, 2022
Room: 211A
Location: Anaheim Convention Center

Session Chair: Brian Wisner, Ohio University

2:00 PM  Invited
NOW ON-DEMAND ONLY - 4D Printable Terpene/Terpenoid Photopolymers For Upcycling Commodity Polystyrene Towards A Circular Economy: Andrew Weems1; 1Ohio University-Main Campus
    Green materials for manufacturing have risen to the forefront of public attention, provoked by the ongoing plastics pollution crisis and climate change. Terpenes and terpenoids, as well as other natural products, have been successfully incorporated into niche polymer applications, but the utility of such bioderived materials has been limited in additive manufacturing (AM) applications. A series of terpenes and terpenoid photopolymers has been explored for their ability to composite commodity polystyrene towards producing 4D shape memory polymer complex prototype scaffolds. Initial properties and recycling strategies for these materials is presented, leveraging low-cost depolymerization strategies as well as degradation to recover small molecules and modified polymers suitable upcycling to 3D printing materials with minimal modifications. Characterizations including physical properties, synthetic procedures, and processing required to achieve AM-suitable materials are used to demonstrated significant enhancements to the upcycled material properties.

2:20 PM  Cancelled
Cadmium (II) Removal from Aqueous Solution by Magnetic Biochar Composite Produced from KOH Modified Poplar Sawdust Biochar: Lei Zhang1; Yongsheng Zhang1; Yanfang Huang1; Guihong Han1; Hafiza Sana1; Shengpeng Su1; 1Zhengzhou University
    The cadmium (Cd2+) pollution from the metallurgical process and the need for sustainable adsorbents call for the development of highly efficient biomass-based adsorbents. In this study, a facile method was proposed to prepare the magnetic biochar composite (MBC) for Cd2+ removal by mixing aqueous Fe3+/Fe2+ solutions with KOH modified Poplar sawdust biochar. The characteristics of the as-fabricated MBC were investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM), Brunauer-Emmett-Teller surface area measurements (SBET), vibrating sample magnetometer (VSM). The SBET of MBC was 206.65 m2/g. Adsorption experiments showed that MBC has a good adsorption performance for Cd2+ at pH 5-6, the maximum adsorption capacity was 54.38 mg/g. In the external magnetic field, MBC shows good separation performance. The outstanding properties including easy separation, low-cost, environmentally friendness and excellent adsorption performance make MBC as promising adsorbent for cadmium containing water treatment.

2:40 PM  Cancelled
Efficient Removal of Molybdenum from Ultra-low Concentration Solutions via Fe(III) Chelating Precipitation: Precipitation Sludge for MoFe Alloy Production via Metallothermic Reduction: Bei Zhang1; Bingbing Liu1; Yanfang Huang1; Guihong Han1; Yubi Wang1; Shengpeng Su1; 1Zhengzhou University
    Ferromolybdenum (MoFe) is the main additive of Mo in steel-making process. In this paper, the precipitation sludge obtained by chelating molybdenum in ultra-low concentration solution with Fe(III) as raw material was studied to produce MoFe alloy by metal thermal reduction treatment of precipitation sludge. The effects of adding of iron or not on the reduction of MoFe were systematically studied. The results showed that the precipitated sludge can be reduced by metal thermal reduction to form iron and molybdenum elementals. In addition, under the condition of adding iron elemental substance, the content of SiO2 in the product decreased because of the producing of Fe2SiO4, and the content of Fe2O3 in the product increased, and the content of molybdenum elemental substance decreased. This technology provides a new idea for the utilization of sedimentation sludge.

3:00 PM  Cancelled
Characterization on the Electrochemical Property of the Ion Flotation Sludges after Thermal Treatment: Guihong Han1; Jingwen Wang1; Bingbing Liu1; Ze Yang1; Yanfang Huang1; 1Zhengzhou University
    Large volume of wastewaters with many kinds of metal contaminants were generated during the mineral beneficiation process in metal mines. Over 99% metal ions can be readily removed via the chelation, flocculation and flotation process, while vast flotation sludges with various metals are concomitantly produced. Metal oxides are usually used as electrode material, and this work investigated the characterization on the electrochemical property of the Cu/Fe ions flotation sludges after thermal treatment. Two kinds of CuFe2O4/CuO and CuFe2O4/Fe2O3 composite materials with good electrochemical property were prepared from the flotation sludges after high-temperature roasting via adjusting the Cu/Fe molar ratio of wastewaters. The results show that these two composites are spherical-like polyhedral particles with uniform particle size and good dispersion. The first charge/discharge specific capacities of CuFe2O4/CuO and CuFe2O4/Fe2O3 were 693.8/1525.2 and 765.3/1152.5 mAh/g, and the average reversible specific capacities were 199.2 and 359.9 mAh/g at current density of 0.1 A/g.