Crimson Publishers-Material Science

Food Waste Materials Appear Efficient and Low-cost Adsorbents for the Removal of Organic and Inorganic Pollutants from Wastewater by Lorenzo Massimi in Crimson Publishers: Peer Reviewed Material Science Journals Excessive release of organic and inorganic pollutants, due to urbanization and industrialization is a critical environmental problem worldwide [1]. In fact, discharge of wastewater from industrial activities releases effluents particularly rich in toxic and carcinogenic pollutants. In the last few years, environmental remediation was focused on the use of low cost adsorbents for the removal of metals and metalloids from wastewater. There are several physic-chemical methods to remove elements from wastewater (chemical precipitation, solvent extraction, reverse osmosis, adsorption, ion exchange and chemical reduction) [1,2]. Adsorption is recognized as an effective and economic method because it offers high efficiency and flexibility in operation [3]. The adsorption phenomenon, i...

On the Energy Harvesting Potential of Lead- Free Piezoelectric Composites from Air-Flow and Temperature Change by Fumio Narita* in Crimson Publishers: Peer Reviewed Material Science Journals   This communication gives a short overview of our recent findings of output voltage in lead-free piezoelectric particle/polymer composites due to air-flow and temperature change. Barium titanate (BTO)/epoxy composite and potassium sodium niobate (KNN)/epoxy composite sheets were fabricated. The composite samples were polarized using either a parallel plate contact or contactless (corona) poling technique. The distribution of the phases in the matrix was studied by a scanning electron microscopy (SEM). The output voltage was then measured for the composite sheets due to airflow. The output voltage was also examined for the composites due to temperature change, and the effect of the poling conditions on the performance was examined. This short communication opens the door for development of fl...

Mechanical Behavior of Ni-Ti SMA Helical Springs Manufactured by Investment Casting by Carlos José de Araújo* in Crimson Publishers: Peer Reviewed Material Science Journals   Shape Memory Alloys (SMA) are smart metallic materials that have being increasingly studied due to their functional properties of recovering original shape by heating after pseudo plastic deformation and super elasticity. In this context, SMA helical springs can be used as actuators or sensors in several areas. This work aims to perform thermal and mechanical characterization of Ni-Ti SMA helical springs produced by investment casting process consisting of induction melting followed by centrifugal casting (ICC). Thermal characterization of the springs was performed by Electrical Resistance as a function of Temperature (ERT), while the mechanical characterizations in static and dynamic regimes were performed in an Instron Model E10000 machine. Results of thermal analysis by ERT showed that the helical Ni-Ti spr...