Exploring the Optical and Structural Properties of Chromium (Cr)-Doped Polyaniline
Green Route Extraction of TPA Monomer from Poly Cotton Fibre: A Sustainable Recovery Approach
Efficient Extraction of Diesel Oil from Waste Plastics: A Comprehensive Study
Laser-Based Ultrasonics for Non-Destructive Material Testing: A Practical Guide
Advancements and Applications of Piezoelectric Energy Harvesters: A Comprehensive Review
An Investigation on Recent Trends in Metamaterial Types and its Applications
A Review on Plasma Ion Nitriding (PIN) Process
A Review on Friction and Wear Behaviors of Brake’s Friction Materials
Comparative Parabolic Rate Constant and Coating Properties of Nickel, Cobalt, Iron and Metal Oxide Based Coating: A Review
Electro-Chemical Discharge Machining- A review and Case study
Electrical Properties of Nanocomposite Polymer Gels based on PMMA-DMA/DMC-LiCLO2 -SiO2
Comparison Of Composite Proton Conducting Polymer Gel Electrolytes Containing Weak Aromatic Acids
Enhancement in Electrical Properties of PEO Based Nano-Composite Gel Electrolytes
Effect of Donor Number of Plasticizers on Conductivity of Polymer Electrolytes Containing NH4F
PMMA Based Polymer Gel Electrolyte Containing LiCF3SO3
In this present work, a Cr-Doped Polyaniline [Cr-PANI-CNT] nanocomposite using the chemical polymerization method is synthesized, where ammonium persulphate was used as an oxidant in an acidic (HCl) medium. The optical properties of both CNTs and PANI with Cr were investigated using Fourier Transform Infrared Spectroscopy (FTIR), and the morphological study of the nanocomposite was performed with the help of FESEM and TEM analysis. Expanding on this, our investigation into the Cr-Doped Polyaniline [Cr-PANI-CNT] nanocomposite's optical properties via FTIR included a detailed examination of the interaction between Carbon Nanotubes (CNTs) and PANI doped with Cr. This analysis not only provided insights into the chemical bonding and structural changes but also shed light on the nanocomposite's potential applications in optoelectronic devices. Furthermore, our comprehensive morphological study using FESEM and TEM analysis allowed us to delve into the nanocomposite's structural characteristics and surface morphology at the nanoscale level. These insights are crucial for understanding the nanocomposite's physical properties and its suitability for various technological applications, such as sensors, energy storage devices, and catalysis. This study explored the electrical conductivity of Cr-Doped Polyaniline [Cr-PANI-CNT] nanocomposite through techniques like electrical conductivity measurements and cyclic voltammetry. These analyses revealed insights into its charge transport mechanisms and potential applications in electronics like field-effect transistors and conductive coatings. Additionally, Thermogravimetric Analysis (TGA) showcased the nanocomposite's thermal stability, making it suitable for hightemperature uses. These findings enhance our understanding and open avenues for its optimized utilization in various advanced technological domains.
Poly-cotton fiber, a blend of polyester and cotton fiber, plays a significant role in the textile industry, with nearly 60% of Poly (ethylene Terephthalate) or PET being utilized for this purpose. However, the effective recovery of PET from textile waste remains a pressing concern, underscoring the importance of adopting greener methods over conventional ones. In this context, phase transfer catalysts have emerged as a promising novel approach in green chemistry. For instance, the use of Tetrabutylammonium bromides as catalysts in the alkaline hydrolysis process facilitates the separation of PET and recovery of TPA with an impressive 95% recovery rate at a relatively low temperature of 100°C. The escalating pace of industrialization coupled with evolving fashion trends has led to a substantial increase in poly-cotton waste generation. Consequently, focusing on the recovery of monomers for reuse not only addresses environmental concerns but also aligns with the fundamental principles of green chemistry, promoting sustainability within the textile sector. Thus, exploring and implementing innovative techniques like phase transfer catalysis can significantly contribute to mitigating environmental impacts while fostering efficient resource utilization in textile production.
Since crude oil serves as the initial material for plastic production, the reverse processing of plastic back into crude oil represents an innovative method employed in the present work for improved plastic disposal. Initially, the long-chain molecules of waste plastics are broken down into shorter chain molecules, which are then further fragmented into smaller molecules using a catalytic cracker. The resulting product is a mixture of oils including gasoline, diesel, kerosene, and similar substances. The machinery and processes involved in oil production are entirely based on environmentally friendly principles. Plastics suitable for conversion into oil include propylene, used garbage bags, cookie packaging, CD cases, polyethylene found in vinyl bags, medical products, PET bottle caps, and polystyrene used in cup noodle bowls, lunch boxes, Styrofoam, etc. In addition to addressing the challenges of plastic waste management, the innovative process outlined in this work underscores a commitment to environmentally conscious practices. By employing catalytic cracking and adhering to sustainable principles throughout the oil production process, the conversion of waste plastics into valuable resources not only mitigates environmental impact but also contributes to the circular economy. The types of plastics suitable for this conversion encompass a wide range of commonly used materials, further highlighting the potential for widespread adoption and impact in reducing plastic pollution. Through this approach, the journey from crude oil to plastic and back to oil demonstrates a holistic and efficient method for managing plastic waste while promoting sustainable resource utilization.
Materials play a crucial role in various industries, ranging from aerospace and automotive to healthcare and electronics. Understanding their mechanical properties is fundamental in ensuring their performance and reliability in different applications. Material testing not only aids in selecting the right material but also in optimizing treatments and processes for enhanced functionality and durability. In recent years, Non-Destructive Testing (NDT) methods have gained prominence due to their ability to assess material properties without causing damage. This approach not only saves time and resources but also allows for continuous monitoring and inspection during the lifespan of a material or component. Among the advanced NDT techniques, Laser-Based Ultrasonics (LBU) has emerged as a powerful tool for non-contact, high-resolution testing and characterization of materials. By harnessing laser technology to generate and detect ultrasonic waves, LBU offers unparalleled sensitivity and precision in assessing material integrity, defects, and structural variations. Its non-invasive nature makes it ideal for inspecting complex geometries, thin films, and delicate components where traditional destructive methods may not be feasible or practical. Furthermore, LBU can provide real-time data, enabling rapid decision-making and quality control in manufacturing processes. This paper aims to highlight the advantages of NDT, particularly the superiority of techniques like LBU, in ensuring the quality, reliability, and performance of materials across diverse industrial sectors. Through comprehensive material testing and characterization, informed decisions can be made regarding material selection, process optimization, and quality assurance, ultimately contributing to advancements in technology and product innovation.
This paper reviews current research on piezoelectric energy harvesting devices for low-frequency applications (0- 100Hz). It explores the challenge of optimizing energy output due to the high elastic moduli of piezoelectric materials. Key aspects contributing to harvester performance are discussed, aiming to minimize reliance on external power and maintenance for devices like wireless sensor networks. Optimizing geometry and dimensions of piezoelectric elements enhances energy conversion efficiency by matching vibration frequencies. Efficient energy management circuits are crucial for capturing and storing harvested energy effectively. These circuits must be capable of efficiently converting the AC output of the piezoelectric harvester into a stable DC voltage suitable for powering electronic devices or charging energy storage devices such as batteries or capacitors. In addition to material and design considerations, environmental factors such as temperature variations and humidity levels can significantly impact the performance of piezoelectric energy harvesters. Therefore, robust encapsulation techniques must be employed to protect the harvester from adverse environmental conditions while ensuring long-term reliability. Overall, this paper provides insights into the current challenges and advancements in the field of piezoelectric energy harvesting for low-frequency applications, offering valuable perspectives for future research and development efforts in this area.
