Version-1 (March – April 2017)
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Abstract: Polyvinylidene fluoride, polyvinylidene difluoride or simply PVDF is a chemically stable thermoplastic fluoropolymer synthesized by the polymerization of vinylidene difluoride. Polyvinylidene fluoride (PVDF) is a piezoelectric polymer material which gives voltage as output when pressure or mechanical force applied on it. Based on this properties it is used in different sensing technology. There are different renewable sources present in environment like ocean waves, rain and wind. PVDF based piezoelectric nanogenerator can be a novel new kind of device which can generate power from all these renewable resources. In this article nanofiber based PVDF nanognerator has been prepared.Taken the output from finger pressure. Output power is mainly depend on the crystallinity and electroactive phase of PVDF . A brief idea about the improvement of crystallinity and electroactive phase is also described here.
Keywords: Polyvinylidene fluoride, piezoelectricity, electroactive phase, nanogenerator, energy
[1.] S. Khan, S. Tinku, R. S. Dahiya, and L. Lorenzelli, Flexible Tactile Sensors using Screen Printed P(VDF-TrFE) and MWCNT/PDMS Composites, Sensors Journal, IEEE, vol. PP, pp. 1-1, 2014.
[2.] A.J. Lovinger, Developments in Crystalline Polymers, Vol. 1, (Ed. D.C. Basset, London, Elsevier Applied Science, 1982)
[3.] S. Lanceros-Mendez, J.F. Mano, A.M. Costa and V.H. Schmidt, J. Macrom, α - to - β Transformation on PVDF Films Obtained by Uniaxial Stretch, Sci.- Phys. Vol. B40 (2001), p. 517
[4.] S. Laceros-Mendez, M.V. Moreira, J.F. Mano, V.H. Schmidt and G. Bohannan, Electrical and Microstructural Changes of β-PVDF under Uniaxial Stress Studied by Scanning Force Microscopy, Ferroelectrics Vol 273 (2002), p. 15.
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Abstract: This report is a followed up study of an earlier published work on Morphological Trends of Modified Coconut Fibre in Natural Rubber Reinforcement, where the Coconut Fibre was modified through the carbonization at varying temperatures of 300,400,500, 600, and 7000C for three (3) hours each. Evaluative examinations gave 6000C as the recommended best temperature at which significant performance of the composites could be achieved. In the present report carbonization was achieved at 6000C for a varying period of 1, 2, 3, 4 and 5 hours in order to evaluate the effect of carbonization time on the morphology and mechanical properties of the Coconut Fibre/Natural Rubber, composites...........
Keywords: carbonization, composites, fibres, morphology, rubber.
[1] G. A. Zickler, W. Wagermaier, S. S. Funari, M. Burghammer, O. Paris. In Situ X-ray Diffraction Investigation of Thermal Decomposition of Wood Cellulose. J. Anal. Appl. Pyrolysis 80, 2007, 134-140.
[2] N. Shebani, A. J. Van Reenen, M. Meincken, the Effect of Wood Extraction on the Thermal Stability of Different Wood-LLDPE Composites. Thermochim. Acta 481, 2009, 52-56.
[3] M. Poletto, J. Dettenborn, V. Pistor, M. Zeni, A. J. Zattera, Materials Produced from Plant Biomass, Part 1: Evaluation of Thermal Stability and Pyrolysis of Wood. Mat. Res. 13, 2010, 375-379.
[4] L. Howell, Understanding Wood Biodegradation through the Characterization of Crystalline Cellulose Nanostructures. Doctoral Thesis University of Maine, 2008
[5] F. P. Momoh, P. A. P. Mamza, C. E. Gimba, P. Nkeonye, Morphological Trends of Modified Coconut Fibre in Natural Rubber Reinforcement. Journal of Emerging Trends in Engineering and Applied Sciences, 7(4), 2016, 167-172.
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Abstract: Fiber identification is the most important things to design a specific purpose dress. In this study, different textile fibers are identified through both technical and non-technical test. Technical test can be microscopic and chemical test & non-technical test can be feeling and burning test. Technical test is more authentic than non-technical test due to its accuracy.
Keywords: Fiber Identification, Technical and Non-Technical Test, Microscopic and Chemical Test, Feeling and Burning Test etc.
[1] Goodway, M. (1987). Fiber identification in practice. Journal of the American Institute for Conservation, 26(1), 27-44.
[2] Luniak, B. (1953). The identification of textile fibres: qualitative and quantitative analysis of fibre blends.
[3] Perry, D. R., Appleyard, H. M., Cartridge, G., Cobb, P. G. W., Coop, G. E., Lomas, B., ... & Farnfield, C. A. (1985). Identification of textile materials. Textile Institute.
[4] Houck, M. M. (Ed.). (2009). Identification of textile fibers. Elsevier.
[5] Corbman, B. P. (1983). Textiles. Fiber to fabric. Gregg/McGraw-Hill Marketing Series; McGraw-Hill. Gregg Division.
