International Conference

Permanent URI for this collectionhttps://dspace.psgrkcw.com/handle/123456789/41

Browse

Author: search.filters.author.Sharmila C

Search Results

Now showing 1 - 5 of 5
  • No Thumbnail Available
    Item
    SYTHESIS AND CHARACTRIZATION OF CHITOSAN BIOPOLYMER
    (Kongunadu Arts and Science College, Coimbatore, 2019-09-19) Thilagavathi P; Sharmila C; Ranjith Kumar R; Chandrashekar B
    Chitin is one of the most abundant natural polysaccharides and it is mainly used for the production of chitosan by a de-acetylation process. Chitosanis a biopolymer used as a packing material in food industry. Chitosan biopolymer is an effective material, due to its functional properties such as antibacterial activity, non-toxicity and biodegradability. The main objective of the study focuses on the synthesis and characterization of the chitosan biopolymer. The chitosan is synthesized by wet chemical synthesis method. The absorbance characteristic was studied by UV visible spectroscopic technique. The crystallinity of the material was confirmed by X-ray diffraction technique. The morphological structure of the polymer sheet was confirmed by SEM analysis. The mechanical strength of the chitosan bio-polymer was analyzed by Tensile and Tear techniques and from the result it is observed that the elongation% and force of biopolymer sheet is about 117% and 1.12 N.
  • No Thumbnail Available
    Item
    SYNTHESIS AND CHARACTERIZATION OF AG-DS BIOPOLYMER COMPOSITES
    (Anna University Chennai, 2019-01-03) Sharmila C; Dinesh M; Chandarshekar B
    Chitosan (CS) biopolymer was added with low loading silver (Ag) metal nanoparticles to form Ag-CS biopolymer composite. Chitosan is a very promising biopolymer because it is environmental friendly due to its biodegradability and is degraded by enzymes in human body without any toxic effect. The major concern of the study focuses on the synthesis and characterization of the biopolymer composite. Different characterization techniques like X-ray Diffraction Analysis (XRD), Fourier Transform Infrared Spectroscopic analysis (FTIR), Scanning Electron Microscopy (SEM) along with Energy Dispersive X-ray Analysis (EDAX) and UV Spectroscopic analysis, was employed to analyze the nature of the biopolymer composite. The antibacterial activity of the biopolymer composite was also studied.
  • No Thumbnail Available
    Item
    SILVER NANOPARTICLES- BIOCOMPATIBILITY AND ANTIBACTERIAL ACTIVITY
    (VIT, Vellore, 2018-10-11) LincyPriyangaa A; Chandarshekar B; Sharmila C
    Silver nanoparticle has attracted much attention in recent years. At low concentration these silver nanoparticles are non-toxic in nature and have a broad spectrum of antibacterial actions. Silver nanoparticles were synthesized by wet chemical synthesis using silver nitrate as a reducing agent. The synthesized silver nanoparticles were then encapsulated with biopolymers like dextran sulphate and chitosan. The biopolymer encapsulated silver nanoparticles were then characterized with different characterization techniques. The presence of silver nanoparticles was confirmed by UV-VIS, XRD, FTIR and SEM spectroscopic techniques. The biocompatibility and the antibacterial activity of synthesized biopolymer encapsulated silver nanoparticles were analysed.
  • No Thumbnail Available
    Item
    STRUCTURAL AND OPTICAL CHARACTERIZATION OF AG DOPED ZNO NANOPARTICLES
    (Amritha University, Coimbatore, 2016-12-20) Selvi C; Jincy C S; Sharmila C; Chandrashekar B
    Ag doped ZnO nanoparticles were synthesized by wet chemical process. The synthesized Ag doped ZnO nanoparticles were characterized by different characterization techniques like UV double beam spectrophotometer, X-ray diffraction (XRD), Photoluminescence (PL), Fourier Transform Infrared Spectroscopy (FTIR), Scanning Electron Microscopy (SEM) along with Energy Dispersive X-ray analysis (EDAX). From the optical characterization it was found that Ag doped ZnO nanoparticles exhibit a broad absorption peak corresponding to 380nm to 400nm. The band gap energy of the as prepared Ag doped ZnO nanoparticles were calculated. From the PL spectra the emission band was found at 555nm. The structural characterization reveals that the synthesized nanoparticles were highly crystalline in nature, possessing spherical and cube shaped grains and are grown in high density. The average grain size was determined from X-ray line broadening spectra using Debye-Scherrer equation. From the characterizations it was found that Ag doped ZnO nanoparticle have a wide range of optical applications.
  • No Thumbnail Available
    Item
    CHARACTERISATION AND EVALUATION OF ANTIBACTERIAL EFFECT OF SILVER NANOPARTICLES
    (PSG College of Technology, Coimbatore, 2015-08-07) Sharmila C; Chandarshekar B; Ranjith R
    Silver nanoparticles have attracted much attention in recent years. At low concentration these silver nanoparticles are non-toxic in nature and have a broad spectrum of antibacterial actions. Many methods are being investigated for the efficient production of silver nanoparticles among which green synthesis process using plant extract showed more successive rate. Employing plants towards the synthesis of nanoparticles are more advantageous because these plants can act as capping and reducing agent and hence increase the rate of reduction and stabilization of nanoparticles. In this present study silver nanoparticles were synthesized by silver nitrate solution dissolved in distilled water with guava leaves as reducing agent. The biosynthesized nanoparticles were characterized with different characterization techniques. The presence of silver nanoparticles was confirmed by UV-VIS, XRD, FTIR and SEM spectroscopic techniques. Antibacterial activity study was also carried out for the biosynthesized silver nanoparticles.