Papers by Keyword: Application

Abstract: Nanoclays in 2D layered silicate materials are versatile and dynamic materials with tremendous potential for advanced functional applications. Small particle size, large surface area, and high porosity are the prominent factors that support the use of nanoclays in many different industrial applications. Apart from these well-known features, with their development capabilities such as mechanical strength, thermal and dimension stability, and permeability, nowadays, nanoclays are the most desired material especially in the production of composite materials and products due to their performance-enhancing effects. This paper provides an overview of the latest applications and improvements of polymer/nanoclay composites. Structures, chemical compositions, surface modification methods before use, synthesis techniques of nanoclay composites, and their usage for innovative applications in various fields regarding the latest developments are briefly summarized.

Abstract: Rapid growth of information and communication technology (ICT) in Indonesia has led to an increased utilization of ICT, such as public service and information center application. Bantulpedia is an application established by Bantul Regency Government with aim to meeting the demands of Bantul residents regarding public services and information center within the Regency. Bantulpedia serves as a platform intended to integrate public and government services from various local government agencies in Bantul Regency, with a specific focus on developing the smart governance dimension. This research particularly aims to (1) identify types of smart governance-based services integrated with Bantulpedia application, (2) analyze the utilization of Bantulpedia application in supporting the implementation of smart governance, and (3) analyze the needs of Bantulpedia application development in supporting the implementation of smart governance. Qualitative methods have been used for conducting this research. Primary data were obtained through observation and in-depth interviews, while the secondary data were sourced from the development plan, Bantul smart city masterplan, and supporting documents. Based on the result of this research, Bantulpedia has 20 features for public service. Tourism, news, and CCTV services are among the most frequently used due to their user-friendly interfaces and accessibility, which make them easily accessible and popular among people. The development of Bantulpedia, in collaboration with various government agencies in Bantul regency, aims to integrate various public services across multiple agencies. However, the restrictive use of the National Identity Number (NIN) limits its functionality.

Abstract: Cellulose is a natural polymer with good properties that have caught researchers' attention to utilize these natural resources' potential. Cellulose also has been widely used as an alternative filler to replace inorganic filler in polymer composites. This review discussed the extraction of cellulose from oil palm empty fruit bunch (OPEFB). This review focused on the OPEFB due to the emergence of palm oil plantations which creates a high amount of biomass, whereas OPEFB is one of the major contributors. The utilization of cellulose application in the polymer focused on alternative fillers in latex application. The postulate crosslink mechanism in latex films is also described to highlight the potential of OPEFB as fillers in latex application. The utilization of OPEFB cellulose has the potential to be explore as bio-fillers with also impact the crosslinks mechanism in latex system which can improved the properties in latex composites.

Abstract: Since the first synthesis of bulk metallic glasses (BMGs) by copper mold casting in 1990, much effort has been devoted to the searching of new BMG composition, the clarification of fundamental and engineering properties for BMGs and their industrialization. At present, BMGs have been formed in a large number of multicomponent alloy systems where the empirical three component rule is satisfied. Nowadays, commercialized BMGs are classified to Zr-based and Fe-based alloy groups. When we look at the industrialization of Zr-Al-Ni-Cu-based BMGs, the first commercialization was made for golf clubs in Japan in 1998, followed by watch parts etc. Since then, Zr-based BMGs have been used continuously up to 2013, though their application scale was in a limited state. Since 2014, the application scale was significantly extended in collaboration with the rapid developments of smartphones and electric vehicles. At present, the mass production facilities for Zr-based BMGs have been significantly developed and variety of BMG products have been produced. On the other hand, Fe-based soft magnetic BMGs were found in 1995. Their BMGs have also been used on a huge number of pieces in various kinds of electronic-magnetic instruments. These recent application states for Zr- and Fe-based BMGs are introduced together with new nanocrystalline Fe-based soft magnetic alloys developed through the derivation of alloy composition from Fe-based BMGs.

Abstract: Pluronic P123 has become a potential agent for solubilizing various metal oxide precursor molecules. However, how these solubilizates affect the morphology of material remains poorly understood. In this review, the morphological transition of TiO₂ and Fe₂O₃ induced by Pluronic P123 micelles has been comprehensively investigated. The change of TiO₂ and Fe₂O₃ structure by P123 micelles forms micellar clusters governed by the balance of hydrophobic interaction and hydrogen bonding, which consequently leads to various micellar morphologies. The review results further show that the intensity of P123-TiO₂ and and P123-Fe₂O₃ interaction increases with the hydrophobicity of the P123, indicating that hydrophobic interaction is more important in the TiO₂ and Fe₂O₃ morphological transition. The transformation of the disordered morphology is more effective in the acidic pH scale range than the basic and neutral ones. Not only pH, but also seen when the reaction time not more than 4 hours with moderate temperature ranging from 300-500 °C and the ratio of P123 to Ti and Fe precursors of 1-5% (%w/w) is the optimum condition which changes the disordered morphology to a more regular one. The acidity, time reaction and temperature as the main parameter influencing the enhancement of the physical properties and morphology for the considered reaction.

Abstract: SiC MOSFETs are rarely used in low-power consumer applications because of their cost and gate driving circuitry requirement. In this work, a cost-efficient SiC MOSFET with a usable 10V of V_GS is proposed. The proposed SiC MOSFET could enable low-power applications, which is around tens to hundreds of watt, to implement SiC MOSFETs. As a result, the thermal performance is better than the GaN solution thanks to the better thermal conductance of the SiC.

Abstract: The most of limestone objects in museums, storehouses and archaeological sites suffered from fragility and weakness which lead to the degradation of these artifacts. The present paper aims to evaluate the use of some nanolime-silica core-shell for consolidation process of these weak limestone artifacts. Two concentrations (5% and 10% w/w) were prepared for consolidating the aged limestone cubic samples. After complete drying, the cubic stones were exposed to the accelerated heat aging. The evaluation of consolidation process for the treated and aged treated samples was performed by some analytical methods such as measurement of physical properties and compressive strength. While, the investigation of surface morphology was carried out by scanning electron microscope (SEM) and measurement of contact angle. The characterization process for the prepared core-shell showed the smoothness and spherical shape of the grains with approximate size of 72 nm. The results of physical properties revealed that the treated samples with 10% of nanolime-silica core-shell gave the lowest porosity (15.57%) and water absorption (6.26%). Additionally, the treated samples with 10% concentration of nanolime-silica core-shell gave the highest values of compressive strength (21.23 Cm²/ Kg) and contact angle (122.78°). Moreover, the investigation using SEM revealed that the smoothness and good penetration for the treated sample with 10% concentration of nanolime-silica core-shell. The results of the present study revealed that the efficiency of consolidation process was maximum using 10% concentration of nanolime-silica core-shell and hence it was applied for consolidation of an archaeological limestone octagonal column, Egypt.

Abstract: During the last two decades, over more than five million research papers (articles, reviews, communications etc.) were published on nanocomposite materials. Most of them are excellent contributions that already mingle the readers’ and researchers’ interests; thus gaining many citations. This mini-review is focused on advancement in next-generation nanocomposite materials based on optical and sensing applications; and their practical execution. Some recent novel developments will be highlighted and future trends will be discussed. Nowadays, nanocomposite has ended up one of the most popular materials with potential usage in various scope, including packaging, automotive and aerospace industry, batteries with higher power output, flexible batteries, making lightweight sensors, in photocatalysis and making tumours easier to look at and to eliminate. New materials, viz. designed polymers, metal oxides, alloys, chalcogenides, nanostructured and hierarchical carbons, regularly induced researchers and engineers; to test and compare them with existing sensors of multifarious sorts. Nanocomposites not only offers’ the new technology and business opportunities in all sectors of the industry but also it tender innovations and new openings for all divisions.

Abstract: Self-assembly is a ubiquitous process in the natural environment, and electrospinning is a simple and convenient method to fabricate nanofibers. The self-assembly of electrospun nanofibers can produce nanomaterials in one-dimension (1D), two-dimension (2D), three-dimension (3D), and even four-dimension (4D). Techniques to fabricate 1D nanomaterials have been reviewed in this paper, especially for nanofiber and nanotube. The mechanism of the fabrication of 2D nanomaterials has been also introduced which is a specific arrangement of 1D nanostructures. The applications of 2D nanomaterials have been reviewed concerning energy devices, electronic devices, and biomedicine. Additionally, 3D nanomaterials, as more complex materials, are mainly utilized in tissue engineering and some in other fields. The advantages have been highlighted to suggest the development and prospect of 4D nanomaterials. Although 4D printing technologies still remain intractable, some aspects of improvement through electrospinning are possible in terms of responsive materials and self-growth materials.

Abstract: Following the rapid growth of the automotive and communication industries, components with high quality and low cost are eagerly desired in China. Various technologies have been developed in China to meet the demand, while semi-solid processing (SSP) of alloys and composites is one of the most successfully developed and practically applied technologies. The major SSP applied in China is the rheocasting in terms of the Swirled Enthalpy Equilibration Device (SEED) process. In this review, we start with a brief reviewing some common slurry preparation methods and recent innovations of the SEED process. Subsequently, we describe the general situation and some recent examples of successful development and applications of SSP in China. Lastly, the future directions in SSP of alloys and composites are highlighted in this frontier research field at the end of this review.