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Fig 3 presents a list of different types of GRP products based on their polymer type reinforcing material type and chemical composition [48][49][50] [51] Among several material options as
·The condition and health of large oil immersed power transformers insulation have a direct impact on the safety and stability of the power grid Therefore it is crucial to investigate the aging characteristics of oil paper insulation in power transformers In this study we developed a computational model for reclosing current calculation and multiphysics
·In this paper attempts to provide a mathematical evidence of the effect of chemical composition of natural fibers on their mechanical properties are made Their tensile strength Young s modulus failure strain density moisture gain microfibril angle MFA length and specific strength are compared with those of constituents of the fibers
·The main objectives of this study are to provide an overview of natural fibers their physical characteristics chemical composition and mechanical properties It also explores the compatibility of natural fibers with different matrix including thermoplastics thermosets ceramic resins biodegradable polymers bioplastics and polymers
·Bio based materials are showing great potential to be widely used in construction industry while reducing fire risk and improving fire resistance of these alternatives also become a major concern due to their inherent flammability Initially this review introduces three common bio based construction materials including biopolymer based materials wood based
·The degradation of cellulose is an important factor influencing its mechanical optical physical and chemical properties and hence the lifetime of paper in libraries and archival collections Regardless of the complexity of the paper material the main chemical pathways for its degradation are hydrolysis and oxidation This study presents an overview of the analytical
·The typical raw material for paper insulation in power transformers is electrical grade softwood Kraft pulp consisting of approximately 85 % cellulose 10 % hemicelluloses and 5 residual lignin
·Fish scale is a unique natural biomaterial mainly composed of type I collagen and hydroxyapatite The highly ordered hierarchical microstructures and composition of fish scales is similar to human hard tissues which endow its good biocompatibility degradability and excellent mechanical properties to fish scales for potential applications including in tissue
· Effect of Moisture Content on Thermal Insulation Properties of Composites Studies have shown that the water absorption of composites increased with the increase of fiber content On the one hand because the plant fiber has strong hygroscopicity the electron micrograph shows that the fiber has a groove structure in the longitudinal direction and a large
·Aerogels are synthesized porous substances formed by substituting the liquid portion of a gel with a gaseous element while retaining its construction [1] Certain silica based aerogels as shown in Fig 1 [2] are practically transparent and weigh less than four times as much as dry air [3] Aerogels are fascinating due to their unique characteristics which include
The paper reports the results of experimental study of the self healing efficiency on metal film capacitor elements with an all over metallization The characteristics of the self healing have been obtained for capacitor elements made of polypropylene polyethylene terephthalate polyphenylene sulfide with zinc metallization and polyimide with aluminum metallization The
The objective of the present paper was to provide an overview on the recent progress in the exploitation of different macroalgae species as a source of bioactive compounds mainly emphasizing the latter published data regarding their potential bioactivities health benefits and industrial applications Algae Chemical Composition The use
·The holocellulose cellulose lignin 1% NaOH solubility hot water solubility and ash contents were quantified to analyse its chemical characteristics Quantification of chemical compositions was conducted in accordance with relevant Technical Association of the Pulp and Paper Industry TAPPI Tests Kurscher Hoffner and Chlorite methods
The degree of polymerization of kraft paper is one of the key properties of cellulosic insulation material used in power transformers since it is providing information about paper mechanical properties and ageing condition In this paper a short introduction on cellulose insulation composition and changes during physical treatment of insulation drying is given together with
·Aramid composite insulation paper is made of aramid chopped fibres and fibrids by wet moulding and hot pressing Under the effect of high temperature and high pressure the fibrid undergoes a glass transition changing from a glassy state to a highly elastic state so it can deform and migrate under pressure forming a reinforced concrete structure" with the
·The aim of this paper is to propose ecological thermal insulation materials that meet the goals of sustainability but also fulfill the imposed thermal performance requirements This paper studies new composite materials based on sheep wool from the perspective of thermal conductivity The composites were prepared using two types of binder acrylic polyurethane
·The chemical composition of corn husk was studied in multiple research work which is shown in Table 1 and Table 2 As it can be observed that there is a variation in the composition of the materials based on the source which is true for almost any natural materials This variation is probably related to the landraces of corn
Traditional state of the art and future thermal building insulation materials and solutions Properties requirements and possibilities Bjørn Petter Jelle in Energy and Buildings 2011 Cellulose Cellulose polysaccharide C 6 H 10 O 5 n comprises thermal insulation made from recycled paper or wood fibre production process gives the insulation material a
·The change in the chemical composition of OIP is studied by means of laser induced breakdown spectroscopy which indicates lower plasma temperature with mineral oil based OIP indicating higher degradation state Its reliable operation is dependent on its insulation design Cellulose paper and pressboard are used as electrical insulation and
·Due to the broad variability in its composition FA characterization is challenging Accordingly FA is categorized into class F and class C according to the maximum and minimum % of SiO 2 Al 2 O 3 Fe 2 O 3 and SO 3 X ray diffraction and fluorescence and scanning microscopy with an energy dispersive spectroscopy are the common techniques
· Solid Insulation Paper Pressboard The solid insulation materials widely used in the transformer are paper press board and transformer board which are formed from the cellulose found in plants Cellulose insulation with mineral oil has played a major role as the main insulation system for transformers for a very long time Cellulose
·The paper established the feasibility of synthesizing HEC nanopowders from molten salt considering both lattice size differences and chemical reaction thermodynamics The method employed a mixture of metal powder carbon powder and KCl to successfully synthesize HEC nanoparticles with a single metal carbide rock salt structure exhibiting
·Plastics also can be divided into two distinct categories on the basis of their chemical composition One category is plastics that are made up of polymers having only aliphatic milk bottles wire and cable insulation toys low density polyethylene LDPE 8 30 100 650 packaging film grocery bags agricultural mulch
