NOPR Collection:

Sorption studies of few selected raw and nanoclay infused lignocellulosic fibres

2019-09-01T00:00:00Z

Title: Sorption studies of few selected raw and nanoclay infused lignocellulosic fibres Authors: Mohan, T P; Kanny, K Abstract: Effect of lumen morphologies of selected raw untreated and nanoclay infused lignocellulosic fibres on the sorption characteristics have been studied. Sisal, kenaf, banana and coir fibres have been selected, and the sorption characteristics, such as adsorption, desorption and absorption properties are evaluated. Nanoclay particles are effectively impregnated into the fibres, and the particles serve as a barrier medium by modifying the fibre-gas/liquid interface. The result indicates that the nanoclay treated fibres result in reduced moisture adsorption with increased fibre surface area. The adsorption-desorption characteristics of untreated and nanoclay treated fibres show sigmoidal isotherm sorption behavior, and the sorption hysteresis depends on crystallinity and nanoclay infusion. It is observed that the absorption characteristics of untreated and nanoclay treated fibres depend upon the nanoclay treatment and lumen phase morphology. Page(s): 263-270

Fabrication of chitosan-alginate microencapsulated curcumin coated scaffold to develop novel cotton crepe bandage

2019-09-01T00:00:00Z

Title: Fabrication of chitosan-alginate microencapsulated curcumin coated scaffold to develop novel cotton crepe bandage Authors: Gnanamangai, Balasubramanian Mythili; Suganya, Mani; Sabarinathan, Ramu; Ponmurugan, Ponnusamy Abstract: Medicated cotton crepe bandages have been developed, using natural curcumin conjugated polymer nanoparticle with biocompatible and biodegradable properties. Curcumin (C) has been incorporated into Chitosan (Ch) and sodium alginate (A) microcapsule, which serve as templates for nanofibres. The coating of C-ChA results in chitosan scaffold (CS) containing curcumin-chitosan microcomplex (CS-CChM). Both the substances act as a powerful biomaterial for tissue engineering applications, especially for wound healing. CS-CChM along with C-ChA have been characterized using FTIR and SEM. The free radical scavenging effect is determined by DPPH (2,2-diphenyl-1-picrylhydrazyl) and anti-inflammatory assay. The developed CS-CChM nanofibre shows an impressive mechanical stability which is an essential requirement for wound healing. The bearing of curcumin shows cytotoxic effect. The in vitro radical scavenging activity and the anti-inflammatory assay are performed by inhibition of albumin denaturation. These microencapsulated matrix displays potent anticancer activity against mouse fibroblast on both normal (L929) and human lung adenocarcinoma (A549) cells. The cell viability is observed to be 51.4 ± 0.71 and 30.53 ± 0.99 respectively for both. CS-CChM nanofibre is found to be stable against enzymatic degradation, which is the most important parameter for promoting the proliferation of cells, contributing to repair and remodeling of tissues during wound healing applications. Page(s): 271-278

Spirograph based electrospinning system for producing fibre mat with near uniform mechanical property

2019-09-01T00:00:00Z

Title: Spirograph based electrospinning system for producing fibre mat with near uniform mechanical property Authors: Pathalamuthu, P; Siddharthan, A; Giridev, V R Abstract: This study focuses on the development of Spirograph-based mechanical system (SBMS) for the collection of polyacrylonitrile fibres in an electrospinning process. The collector plate is set to trace a spiropath in such a way that the event of crossing the centre of collection region from different radial direction is high. To assess the capability of SBMS, electrospun mat of acrylic has been prepared and the properties of samples sectioned from different angular positions of a circular mat are evaluated. The diameter and alignment of fibres are analyzed by processing the scanning electron microscopy (SEM) images of electrospun mats with the use of ImageJ software. The electrospun mat produced using SBMS collector assembly exhibits near uniform characteristics like thickness, tensile strength, porosity, fibre diameter and fibre alignment as compared to the electrospun mat produced by using conventional static collector. Page(s): 279-285

Thermo-mechanical properties of sodium chloride and alkali-treated sugarcane bagasse fibre

2019-09-01T00:00:00Z

Title: Thermo-mechanical properties of sodium chloride and alkali-treated sugarcane bagasse fibre Authors: Mohit, H; Selvan, V Arul Mozhi Abstract: The experimental characterization of mechanical and thermal properties of treated and raw sugarcane bagasse fibre has been studied. The bagasse fibres are treated with sodium chloride (NaCl) and sodium hydroxide (NaOH) solutions. The NaOH treated fibres show better structural and thermal properties than other two types. SEM image of alkali-treated fibres reveals that the bundles of fibres are mainly composed of thin parenchyma cell walls. The fibres are joined with each other which improves the mechanical properties. The statistical analysis is also performed using ANOVA one-factor method. From ANOVA, the significant difference between the dependent parameters and the various chemical treatments are determined. The results show that the NaCl and NaOH treated fibres significantly improve the mechanical properties and thermal stability. Page(s): 286-293