Mainak Mitra

Bio: Mainak Mitra is an academic researcher from University of Calcutta. The author has contributed to research in topics: Polypyrrole. The author has an hindex of 1, co-authored 1 publications receiving 2 citations.

Development of biodegradable conductive cotton yarns by in-situ polymerisation of pyrrole

Abstract: Cotton yarns were modified with pyrrole in the presence of ferric chloride following a dip-nip-dry technique. Treatment of cotton with 23.4% aqueous pyrrole followed by treatment with 40.6% aqueous ferric chloride and subsequent drying in atmospheric air produced balanced improvements in the properties of the yarn such as conductivity, tensile strength and extensibility. Among the three types of yarns such as ring spun, rotor spun and friction spun considered for such treatment, ring spun yarn performed best in respect of conductivity and retention of strength. Examination of surface morphology of yarns by scanning electron microscopy revealed a common discontinuity in the growth of polypyrrole along the length of the yarns spun using friction spinning and rotor spinning systems. Such discontinuity was caused by the wrapper fibres. Ring spun yarn, on the other hand, allowed a continuous spiral growth and deposition of polypyrrole in the inter-fibre space and on the surface of the yarn. Study of py...

Effects of chemical treatments and degumming methods on physical and mechanical properties of okra bast and corn husk fibers

Abstract: In this study, okra (Abelmoschus esculentus) bast fibers and corn (Zea mays L.) husk fibers were extracted via different degumming methods and subjected to different chemical treatments including a...

Electromagnetic Attenuation Performance of Sustainable e-Textile Derived from Polypyrrole Impregnated Jute Fabrics with Predominant Microwave Absorption

Abstract: ABSTRACT The proliferation of electromagnetic (EM) pollution is more rapid now and can be more outrageous in near future due to the exponential growth of the electronics industry. Strategy of using natural fibers for fabricating efficient EMI shielding materials is an environmentally benign solution for this serious peril. With this motivation, we are introducing novel e-textile derived from sustainable jute fabrics that are capable of suppressing and absorbing EM radiations in the frequency range 8.2–12.4 GHz (X-band). In the present work, jute fabrics were in-situ polymerized with pyrrole monomer. These conductive fabrics were then characterized and correlated for their structure, morphology, thermal stability, electrical conductivity, and EMI shielding capabilities. Moreover, this e-textile showcased excellent electrical conductivity of 1.160 S/cm and exhibited a maximum EMI shielding effectiveness value of −30.2 dB (>99.9% blockage) at 1 mm fabric thickness by a predominant absorption behavior with menial reflection or secondary pollution, which is highly beneficial for commercial applications. This is so far the first report of jute fabrics as e-textile with the highest shielding efficacy value reported, which makes them an ideal candidate for next generation of smart and wearable electronic textiles for futuristic applications such as robotics and artificial intelligence (AI).

Innovation in Biodegradable Textile Fibers for the Creation of Ecological Textiles

Abstract: This research carries out a systematic, descriptive, documentary study in the textile area focus on biodegradability in textile fibers to know in this first approach the processes that have detected the material obtained by biological action to change and lose its original properties and chemical level decreasing in as much as possible the damage environment, benefic to the areas: textile, construction, agriculture, livestock, fish farming, among others. 40 relevant articles or review articles of interest of factor-impact Q1, Q2, Q3 are selected: 22 selected articles are Q1, 17 articles are Q2 and 1 articles Q3 of the last 10 years, which answered the research question asked on impact investigations in this area.