Compression Sleeves - A Pragmatic Approach to Managing Design Variables and Constraints

2025-01-01

Nanodiamond-Modified Electrospun Pvdf Nanofibers for Enhanced Piezoelectric Nanogenerators

SSRN Electronic Journal · 2025-01-01

Graphene oxide-intercalated PVDF nanofibers as a novel piezo separator for self-charging supercapacitors

Nanoscale · 2025-01-01 · 1 citations

were achieved. The fabricated SC exhibited an excellent rate capability and the capacitance retention was up to 98% after 5000 cycles. The SCSC could self-charge up to 420 mV in approximately 4 min. These findings demonstrate the effectiveness of the SCSC in converting mechanical energy into usable electrical power. The results provide new insights into the advancement of self-charging energy storage systems.

Novel palm peat lignocellulosic adsorbent derived from agricultural residues for efficient methylene blue dye removal from textile wastewater

Applied Water Science · 2025-01-27 · 21 citations

Abstract Palm Peat (PP), the world’s first rich lignocellulosic medium derived from date palm agricultural residues, has not been previously explored for environmental purification. This study evaluates PP's performance in adsorbing methylene blue (MB) dye. PP is characterized by a spongy, porous structure with a surface area of 16 m 2 /g. It possesses a significant carbon and oxygen composition and features active surface functional groups. Under conditions of 30 mg/L initial MB concentration, 1 g/L PP dose, T = 30 °C, pH 7, and 900 rpm stirring speed, PP achieved a 68.26% MB removal efficiency within 90 min. Although higher temperatures enhanced MB removal efficiencies, room temperature (30 °C) was chosen for subsequent experiments to assess adsorption performance under ambient conditions and minimize energy consumption. Stirring speeds exceeding 900 rpm reduce MB removal efficiency, likely due to shear forces disrupting the interaction between MB molecules and PP or causing desorption of previously adsorbed dye molecules. Response surface methodology combined with a central composite design was employed to optimize the initial MB concentration, PP dosage, and solution pH. Under the optimum conditions, PP achieved 97.89% MB removal. PP exhibited strong stability over five adsorption cycles. Adsorption occurs via π-π stacking, hydrogen bonding, hydrophobic-hydrophobic interactions, and electrostatic interaction with the process being endothermic and following the Langmuir isotherm model and pseudo-second-order kinetic model. The adsorption efficiency studies across different water matrices revealed the lowest degradation rate in the drain water matrix. PP achieved 71.5% MB removal and 48.16% TOC removal from real textile wastewater.

Antimicrobial impact of locally generated piezoelectric fields from solution-blown PVDF/PVDF-TPU nanofiber mats

Emergent Materials · 2025-09-23 · 1 citations

Using Electrocoagulation as Green and Efficient technology for Removing Toxic heavy metals from Industrial Wastewater

Engineering Research Journal · 2025-01-01

Copper is a very toxic heavy metal to the environment when it is dissolved in the water in a high concentration, many studies have focused on eliminating copper from industrial wastewater through different methods. Electrocoagulation has been used as a suitable industrial wastewater treatment technology to use in removing copper. For this research, aluminum electrode was used as anode and cathode for removing Copper (Cu) from synthetic wastewater. Batch tests were conducted to know the performance of copper removal through EC system. Different factors were studied such as pH (4, 6, 8 and 10), initial concentration (10, 20, 30 and 40) ppm, contact time (1, 2.5, 5, 10, 15 and 30) min, stirring speed (50, 100, 150 and 200) rpm, inter-electrode spacing (1, 2, 3 and 4) cm and current (0.1, 0.2, 0.3 and 0.4) A, at room temperature. The results showed an increase in removal efficiency of copper ions within the first 30 minutes, while equilibrium was occurred within 15 minutes, and the optimum pH was found to be 6, The removal efficiency for copper ions reached to 98% by using aluminum electrodes.

OPTIMIZATION OF FLAX FABRIC/POLYESTER COMPOSITES FOR AUTOMOTIVE INTERIOR APPLICATIONS: MECHANICAL PERFORMANCE, AND MOISTURE RESISTANCE

Egyptian Journal of Chemistry · 2025-09-07

This study provides a critical analysis of optimizing polyester composites for automotive interior components through the use of flax fabric-reinforced polyester composite. In terms of sustainability, it explores how fiber orientation, alkali treatment, and rib reinforcement can be optimized to enhance mechanical properties and moisture resistance. Low-density, green flax fibers were treated with 5% sodium hydroxide for 20 minutes, resulting in unidirectional composites with improved tensile strength (70.03 MPa) and flexural strength (96.71 MPa) due to a strengthened fiber-matrix interaction. The incorporation of ribbed reinforcement also increased the modulus of rupture to as high as 266.7 MPa, signifying enhanced load-carrying capacity. Among the various categories of test specimens, CM 4/1 exhibited the highest water resistance, absorbing only 6.4% of water within 72 hours, making it suitable for use in humid conditions within car interiors, such as dashboards and door panels. Furthermore, compression molding (CM) and resin transfer molding (RTM) were compared, revealing that CM outperformed RTM in terms of stiffness, strength, and water resistance.One of the principal contributions of this work is a performance-based ranking matrix that uses mechanical and environmental data to propose the best material combinations. intriguing avenue toward the replacement of sustainable applied in car design.This study is significant because it not only demonstrates that flax/polyester composites can meet the dual requirements of mechanical performance and environmental durability for automotive interiors but also provides a practical selection tool for matching composite configurations to specific component demands, supporting the automotive industry’s sustainability objectives.

Girth Weld Reinforcement Case Study: A Numerical and Experimental Approach

2025-01-01

Application of Electrocoagulation technology for removing pollutants from electroplating wastewater

Engineering Research Journal · 2025-11-27

The growth of industry is caused problems to the environment as it considered the big source of pollutants like heavy metals, industrial wastewater coming from electroplating industry contain dangerous heavy metals like copper, cadmium, lead, that have a toxic effect on the environment because of their poisonous, persistent nature, these pollutants spread in the environment like air, water, soil and human can easily absorb these heavy metals from water, because of their ability to soluble in aquatic media. This study investigated the use of the (EC) electrocoagulation process in the treatment of electroplating wastewater that contain heavy metals, aluminum electrodes were used as anode and cathode for removing pollutants from wastewater. Batch tests were conducted to know the performance of pollutants removal by EC system and the optimum operating conditions were the electrolysis time of 40 min at the current of 0.4 A, interelectrode distance was 1 cm, and mixing speed 200 rpm and obtained removal efficiencies of Cu2+, Pb2+, Cd2+ ions were obtained (98%, 90%, and 67%) respectively, besides the removal efficiencies investigated in the present study were the energy consumption of EC and the material consumption of aluminum electrodes that varied from (0.335-5.32) kW-h /m3 and from (0.005 - 0.09) g with changing time from (2.5 -40) min, respectively. This method has proven its effectiveness and that it is eco-friendly, because of less generated sludge and no added chemicals.

PVDF nanostructures characterizations and techniques for enhanced piezoelectric response: A review

Materials Chemistry and Physics · 2024-07-27 · 55 citations