NOPR Collection:

Textile-based smart wound dressings

2010-06-14T16:30:29Z

Title: Textile-based smart wound dressings Authors: Gupta, Bhuvanesh; Agarwal, Roopali; Alam, M S Abstract: Efforts have been made during the last few years towards the development of new artificial wound coverings which will meet the requirements necessary for the treatment of major skin wounds. Research has been mainly focused on achieving the specifications of an ideal wound dressing, such as hydrogel technologies providing products suitable for applications in biomedical, personal care as well as nano-sensor. But as the hydrogels have low mechanical strength, recent trends have come up in the form of composite membranes, where a textile material is coated with the polymer solution. The fabric reinforcement provides strength to the dressing and the drug loaded dressings offer precise control of the release behavior. The present paper reviews various efforts made on the textile - based composite structures for their applications as wound dressings, based on the current research and existing products. Page(s): 174-187

Development of predictive model for setting stitch length value of single jersey cotton fabrics

2010-06-15T16:30:31Z

Title: Development of predictive model for setting stitch length value of single jersey cotton fabrics Authors: Badal, M; Unmar, R; Rosunee, S Abstract: A statistical approach has been used to predict the stitch length of single jersey fabrics from known yarn counts and fabric area densities in the grey reference state. The model has been based on the observational data from two hundred and sixty samples of tubular weft-knitted single jersey cotton fabrics produced under bulk conditions in a knitting plant. The multiple regression analysis technique is used to develop the predictive equation. Validation of the model by follow up on knitted samples reveals that the predicted stitch length value from the equation is acceptably close to the real value. The statistical model can therefore be used to eliminate the need for trial and error methods in the development stage of single jersey fabrics. Page(s): 172-173

Optimisation of multi-enzyme scouring process using Taguchi methods

2010-06-14T16:30:26Z

Title: Optimisation of multi-enzyme scouring process using Taguchi methods Authors: Saravanan, D; Ramanathan, V A Arun; Karthick, P; Murugan, S Vel; Nalankilli, G; Ramachandran, T Abstract: Scouring of cotton fabrics using combinations of pectinase, cellulase and protease in a single bath – two step has been carried out with optimum process parameters obtained from these enzymes individually. Absorbency and residual extractable impurity levels are found to be better for multi-enzyme scouring as compared to that for scouring using individual enzymes. Though higher weight losses are observed in the multi-enzyme scouring treatment, the strength loss of multi-enzyme scoured samples is not higher than that of samples obtained from individual enzyme scouring. Scaling and adjustment factors identified using Taguchi methods for the above response variables are further substantiated by confirmation tests. Page(s): 164-171

Kinetic and adsorption studies of Indian siris (Albizia lebbeck) natural dye on silk

2010-06-14T16:30:25Z

Title: Kinetic and adsorption studies of Indian siris (Albizia lebbeck) natural dye on silk Authors: Vinod, K N; Puttaswamy; Gowda, K N Ninge; Sudhakar, R Abstract: Spectral techniques have been used to identify and characterize the color constituent of the bark of Albizia lebbeck. The dyeing potential and color fastness properties of the extract have been evaluated on silk yarn. Pre-mordanting of the dye is found to be better than post-mordanting, particularly with alum which gives higher color strength values. The color co-ordinates of dyed samples lie in the yellow-red quadrant of color space diagram. The kinetic and adsorption studies on the dye uptake by silk yarn have also been carried out. The positive standard affinity indicates a spontaneous adsorption. During the dyeing process the enthalpy change is positive, indicating an endothermic process with large negative entropy change. This implies an uniform ordered distribution of dye on silk. The adsorption of the dye fits into the Langmuir model of isotherm having high regression coefficient. These findings indicate that the color extract of the bark of Albizia lebbeck serves as a potential natural dye for silk fabrics. Page(s): 159-163