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Kawlekar S.R.,Central Institute for Research on Cotton Technology
International Dyer | Year: 2011

The necessity of a safe environmental balance has resulted in a revival of natural dyes against the backdrop of impending ecological disasters. Natural dyes are aesthetically appealing, environment friendly, biodegradable and non-toxic. The study deals with the dyeing properties of the dye obtained from the pulp of Bixa orellana. It outlined the optimisation of dyeing conditions and fastness properties of the cotton fabric dyed with annatto. The study proposed that annatto imparted many beautiful shades to cotton fabric, when used with mordants as well as with some inorganic salts. It dyed cotton at alkaline pH. Though fastness of the dyed fabric to light was moderate in general, fastness to perspiration, washing and crocking was found to be moderate to excellent. Thus, there is a scope to improve the fastness properties by finding the means to make the dye more stable and thus resistant to fading. Source


Bhowmick M.,Central Institute for Research on Cotton Technology | Mukhopadhyay S.,Indian Institute of Technology Delhi | Alagirusamy R.,Indian Institute of Technology Delhi
Textile Progress | Year: 2012

Natural fibres were initially used in composite materials to predominately improve bulk and reduce cost rather than improving mechanical properties. But the environmental problems associated with the production and use of synthetic fibres have changed the scenario. In the previous decade, natural fibres have been extensively used as reinforcement materials for both synthetic and bio-degradable matrices. Natural fibre reinforcements have mostly improved flexural and impact properties, but tensile strength improvement has been marginal and has been an area of investigation. Many attempts have been made towards improving mechanical properties, with efforts directed at improving the interface, newer methods of production of composites, new modelling techniques etc. In this detailed review, an attempt is made to critically analyse the various research efforts directed towards improving the mechanical properties of natural fibre reinforced composites. © 2012 Copyright Taylor and Francis Group, LLC. Source


Guruprasad R.,Central Institute for Research on Cotton Technology | Behera B.K.,Indian Institute of Technology Delhi
Fibers and Polymers | Year: 2014

The possibility of prediction of bending rigidity of cotton woven fabrics with the application of Neuro-genetic model has been explored. For this purpose, number of cotton grey fabrics meant for apparel end-use was desized, scoured, and relaxed. The fabrics were then conditioned and tested for bending properties. A feed-forward neural network model was first formed and trained with adaptive learning rate back-propagation with momentum. In the second model, a hybrid learning strategy was adopted. A genetic algorithm was first used as a learning algorithm to optimize the number of neurons and connection weights of the neural network. Later, a back-propagation was applied as a local search algorithm to achieve global optima. Results of hybrid neural network model were compared with that of back-propagation neural network model in terms of their prediction performance. Results show that the prediction by Neuro-genetic model is better in comparison with that of back-propagation neural model. © 2014 The Korean Fiber Society and Springer Science+Business Media Dordrecht. Source


Sharma M.,Central Institute for Research on Cotton Technology | Nachane R.P.,University of Mumbai
Indian Journal of Fibre and Textile Research | Year: 2010

A simple novel method has been developed for scouring different varieties of cotton fibres and fabrics using non-ionic surfactant and the results are compared with those of the conventional method. It is observed that the novel method does not affect the 2.5% span length, micronaire and tenacity of the cotton. However, the uniformity ratio is found to decrease on treatment. Sinking time for the treated cotton remains within the standard limits, thus making it suitable as absorbent. On comparing with conventional method, it is found that the dye uptake, and colour fastness to washing and perspiration of cotton fabrics treated with the new method are equal to or better than those of the fabrics treated with conventional method. The new method is not only simple to operate but also ecofriendly and economic. Source


Banerjee D.,Central Institute for Research on Cotton Technology | Chattopadhyay S.K.,Central Institute for Research on Cotton Technology | Tuli S.,Indian Institute of Technology Delhi
Indian Journal of Fibre and Textile Research | Year: 2013

With the development of high resolution infrared cameras, thermography is gaining increased attention of the researcher not merely as a non-contact tool to measure surface temperature of the objects, but also as a tool in fine physical experiments to analyze thermo-physical phenomena. Apart from their regular application in condition monitoring and preventive maintenance, the infrared cameras are slowly finding application in research and development. In the field of textile research, the application of thermal imaging is still at its infancy. Most of the present applications are for qualitative observations of surface temperature profile of the object. In the present paper, various applications of thermography in textiles and allied fields have been reported with a projection of potential future research where thermography may play crucial roles. Source

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