Experimental Study on Optimization of Filler Concentration of Silicon Rubber Compound Used in High Voltage Insulators

In any power transmission system, insulators are essential for a reliable electrical power supply. The Efficiency of insulators will be decided by their electrical and mechanical properties. Recently in many of the power transmission systems, the conventional porcelain insulators are being replaced by polymeric insulators due to various advantages in their properties. Polymeric insulators have been increasingly popular in recent years as a result of their superior performance in contaminated environments due to their hydrophobic nature. However, research is still being carried out on Polymeric material with regards to ageing condition and feasibility for large scale utilization. Ageing of insulation is due to Environmental, Tracking and Erosion conditions. Ageing leads to immature failures and uncertainty in the performance of the insulators. The constituent materials and their properties have a significant impact on the performance of polymeric insulators. There is a strong need to look into newer filler materials which can be added to the existing polymeric base materials to constitute a composite. Keeping this in mind, in the proposed research uses Silicone rubber as base polymeric material and along with that additives are added to arrive at three different composites. A new filler material will be added to the base material forming a new composite. All these HTV Silicone rubber based composites are then tested the recovery of hydrophobicity, dielectric strength, hardness, specific gravity, tensile strength , ultimate elongation ,tear strength properties based on ASTM standards. Further, Inclined plane Tracking and Erosion studies are also conducted on the polymeric test samples for 6 hours to evaluate the SiR housing material suitability for outdoor insulator applications by subjecting them to AC high voltages under laboratory conditions as per IEC 60587 standards. Keywords: Recovery of hydrophobicity, dielectric strength, hardness, specific gravity, tensile strength, ultimate elongation, tear strength, inclined plane tracking and erosion, ageing, filler material.

Synthesis of Insulin Loaded Nanoparticles and Their Antidiabetic Studies

The goal of this present work turned into synthesis of polymeric nanoparticles from natural polymeric material. Natural polymeric nanoparticles have some unique physicochemical properties like stability, biocompatibility, biodegradability, and manage the drug release, so it’s used for drug transport. On this look natural polymeric material Casein and Chitosan are used for the synthesis of nanoparticles. Insulin drug was introduced to these polymeric nanoparticles, which are used for the drug delivery. These drug loaded polymeric nanoparticles are synthesised by nano precipitation technique. The particles size of drug loaded polymeric nanoparticles based totally the rate of stirring and time of nanoparticles synthesised. Insulin was used as a drug and Glutaraldehyde was used as a linking agent. This insulin drug becomes adsorbed on the surface of the nanoparticles. Those drug loaded nanoparticles are characterized by FT-IR spectrum and physical status is analysis by means of XRD pattern. The morphology of the drug loaded nanoparticles is studied by using Scanning Electron Microscopy (SEM). From those characterisation studies insulin drug was efficaciously loaded with the nanoparticles. It has high inhibitory property towards kind II diabetics.

Development of a method for determining the consumption of a polymer composition on the surface of abrow tissue to reduce the expansion of threads

The article deals with the results of theoretical research of the use of polymer composition based on collagen to reinforce the structure of textile materials in order to prevent sliding in the seams. The calculation of the weight of polymer composition applied to the surface of textile material of garments has been presented. The dependence of the weight of polymer composition on the radius of warp and weft yarns and the width of a unit fabric structure has been determined. A formula for the volume of polymeric material has been obtained to calculate the necessary mass of the polymeric composition applied to the surface of the connection seams.

Effect of Aloe vera Hydrogel Application on Increasing the Number of Fibroblasts in Socket Wounds Post-Tooth Extraction: An In Vivo Study

Background. Aloe vera has been used as an anti-inflammatory, antimicrobial, and immune-boosting agent since ancient time. Hydrogel is a polymeric material that can retain a significant amount of water component and can last as long as possible in the gingival sulcus because the hydrogel is hydrophilic. This study is the first study that seeks to explore the potential of Aloe vera in healing socket wounds after tooth extraction. Methods. Twenty-five white rats of the Wistar strain were acclimatized for seven days before being included in the study. After acclimatization, the experimental animals were grouped into five groups. Evaluation of fibroblast response process with HE staining. Results. There were differences in the mean number of fibroblasts in all groups. From the results of this study, it can be stated that there is an effect of the application of hydrogel Aloe vera 1%, 2.5%, 5%, 10%, and xylazine on the increase in the number of fibroblasts in socket wounds after tooth extraction in Rattus novergicus. Conclusion. There is an effect of Aloe vera hydrogel application on increasing the number of fibroblasts in socket wounds after tooth extraction in Rattus novergicus.

Polymer Characterization

As discussed in section 10.1007/978-3-658-35926-3_2, the characterization of cross-linking and especially its spatial distribution is crucial for the fabrication of micro optics, MEMS, and semiconductors. Some studies have found that the measurement of the refractive index over the cross-linking process can be used as an indicator for the degree of cross-linking of a sample. According to Kudo et al., [130], the cross-linking of a polymeric material leads to a densification which can be directly related to an increase in refractive index using the Lorentz-Lorenz equation.