Dr. Omdeo K . Gohatre | Laboratory for Advanced Research in Polymeric Materials- CIPET (original) (raw)
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Papers by Dr. Omdeo K . Gohatre
Waste Management & Research, 2020
The recycling of polyvinyl chloride (PVC) recovered from the plastic insulations in wires and cab... more The recycling of polyvinyl chloride (PVC) recovered from the plastic insulations in wires and cables is a rising concern in the current situation due to its hazardous behaviour during recycling. Similarly, high-impact polystyrene (HIPS) and acrylonitrile butadiene styrene (ABS) used in the structural components of electrical and electronic equipment are also generated in large quantities. In the current work, three agendas were fixed: (a) to determine the effect of recycled polymeric material (HIPS and ABS) recovered from different sources on the mechanical property of the polymeric blends; (b) to formulate a high-impact strength blend; and (c) to deduce a mechanism for improved impact strength. The mechanical characterizations were conducted on the entire blends formulated. Among them, the recycled blend composed of recycled PVC (r-PVC) and recycled ABS (r-ABS) (segregated from uninterrupted power supply housing) and recycled HIPS (r-HIPS; collected from television housing) was con...
Journal of Vinyl and Additive Technology, 2019
Waste Management & Research: The Journal for a Sustainable Circular Economy, 2019
Extreme complexity in the range of metallic and non-metallic parts present in waste printed circu... more Extreme complexity in the range of metallic and non-metallic parts present in waste printed circuit boards leads to incineration for collecting valuable metals. The non-metallic parts of the printed circuit board can be used effectively without affecting the environment. In this study, the non-metallic parts of the printed circuit board, which is made up by cross-linked resin and fibre, was used as a filler in recycled plasticised polyvinyl chloride collected from waste wires and cables. The properties of the plasticised polyvinyl chloride matrix and plasticised polyvinyl chloride–non-metallic parts of printed circuit board composite were compared with each other by means of mechanical properties and thermal properties. Both mechanical and thermal properties results indicated that incorporation of non-metallic parts of printed circuit board significantly improved the hardness, stiffness, abrasion resistance and thermal stability of plasticised polyvinyl chloride–non-metallic parts o...
Journal of Applied Polymer Science
Journal of Polymer Research, 2021
In current study the blends prepared by utilizing recycled poly(vinyl chloride) (r-PVC) as well a... more In current study the blends prepared by utilizing recycled poly(vinyl chloride) (r-PVC) as well as recycled acrylonitrile butadiene styrene (r-ABS) material recovered from e-waste are investigated with respect to property enhancement. Also, nitrile
rubber (NBR) was added to prepared blends of r-(PVC/ABS) as a bridging agent between the optimized blends composition.
The blends was prepared by means of the melt-mixing process and further tensile sample prepared using micro-compounding
process. The superior properties on compatibility between NBR-modifed r-(PVC/ABS) blends were successfully studied
using rheological, mechanical, morphological, thermal, and water absorption analysis studies. The primary analysis of
r-PVC and r-ABS was employed using FTIR analysis. The thermal stability of blends containing 10 wt% NBR was stable
up to 253 ºC. In addition, signifcant enhancement on impact strength of r-(PVC/ABS) blends having 10 wt.% of NBR content. Morphological properties of NBR added based blends presented proper homogenization and properly mixed recycled
polymer-rubber phase in prepared r-(PVC/ABS) blends. The water absorption test results showed rapid ingress of water with
an increase in NBR content in prepared blends. This study provides a novel way towards reuse the polymer from electronic
waste with its improved properties by preparing blends.
![Research paper thumbnail of Surface Modification of Synthesized Layered Double Hydroxide [LDH] for Methylene Blue Dye Removal in Textile Industry via Photocatalytic Activity under Visible Light](https://attachments.academia-assets.com/66164951/thumbnails/1.jpg)
](Transtech Publication, 2017
Layered double hydroxides (abbreviated as LDHs) are one of the nano-ordered layered compounds. Th... more Layered double hydroxides (abbreviated as LDHs) are one of the nano-ordered layered compounds. The importance of layered compound is based on their ability to retain chemical species with electrical charges compatible to those of the layers. In this study we have reported the synthesis of nano-sized layered double hydroxide (LDH) by co-precipitation method using two different surfactants as cetyl trimethyl ammonium bromide (CTAB) and octadecyl trimethyl ammonium bromide (ODTMA) having different critical micelle concentration (CMC) /chain length and its comparative results on calcined surface modified LDH (CS-LDH). The structure of surface modified layered double hydroxide (CS-LDH) synthesized is unique and has important advantages to the photocatalytic activity. LDH has significant number of application due to their structural, chemical properties etc., these compounds can be used as catalyst, adsorbents, anion exchanger. The photocatalytic activity of prepared surface modified CS-LDH was tested on degradation of the methylene blue (MB) dye in an aqueous solution. The surface characteristics of LDH and CS-LDH were examined using Energy Dispersive X-ray (EDX), Scanning Electron Microscopy (SEM), X-ray diffraction (XRD) and UV-Visible spectrophotometer for Photocatalytic activity under visible light using MB dye. It was observed that highly exfoliated and basal spacing in CS-LDH-ODTMA which enhanced photocatalytic activity (Approx. 60% degradation) than that of comparison to CS-LDH-CTAB (Approx. 32% degradation). Introduction Among the group of minerals referred to as 'Non-Silicate Oxides and Hydroxides' (Newman, 1987), the 'layered double hydroxides' (LDH) have many physical and chemical properties that are surprisingly similar to those of clay minerals. Their layered structure, wide chemical compositions (due to variable isomorphous substitution of metallic cations), variable layer charge density, ion-exchange properties, reactive interlayer space, swelling in water, and rheological and colloidal properties make LDH clay-like. But because of their anion-exchange properties, LDH were referred to as 'anionic clays' Layered double hydroxides (LDHs) are anionic clays also known as 'hydrotalcite-like' compound. The structure of hydrotalcite is related to that of brucite, Mg (OH)2 in which some of the Mg2+
Waste Management & Research, 2020
The recycling of polyvinyl chloride (PVC) recovered from the plastic insulations in wires and cab... more The recycling of polyvinyl chloride (PVC) recovered from the plastic insulations in wires and cables is a rising concern in the current situation due to its hazardous behaviour during recycling. Similarly, high-impact polystyrene (HIPS) and acrylonitrile butadiene styrene (ABS) used in the structural components of electrical and electronic equipment are also generated in large quantities. In the current work, three agendas were fixed: (a) to determine the effect of recycled polymeric material (HIPS and ABS) recovered from different sources on the mechanical property of the polymeric blends; (b) to formulate a high-impact strength blend; and (c) to deduce a mechanism for improved impact strength. The mechanical characterizations were conducted on the entire blends formulated. Among them, the recycled blend composed of recycled PVC (r-PVC) and recycled ABS (r-ABS) (segregated from uninterrupted power supply housing) and recycled HIPS (r-HIPS; collected from television housing) was con...
Journal of Vinyl and Additive Technology, 2019
Waste Management & Research: The Journal for a Sustainable Circular Economy, 2019
Extreme complexity in the range of metallic and non-metallic parts present in waste printed circu... more Extreme complexity in the range of metallic and non-metallic parts present in waste printed circuit boards leads to incineration for collecting valuable metals. The non-metallic parts of the printed circuit board can be used effectively without affecting the environment. In this study, the non-metallic parts of the printed circuit board, which is made up by cross-linked resin and fibre, was used as a filler in recycled plasticised polyvinyl chloride collected from waste wires and cables. The properties of the plasticised polyvinyl chloride matrix and plasticised polyvinyl chloride–non-metallic parts of printed circuit board composite were compared with each other by means of mechanical properties and thermal properties. Both mechanical and thermal properties results indicated that incorporation of non-metallic parts of printed circuit board significantly improved the hardness, stiffness, abrasion resistance and thermal stability of plasticised polyvinyl chloride–non-metallic parts o...
Journal of Applied Polymer Science
Journal of Polymer Research, 2021
In current study the blends prepared by utilizing recycled poly(vinyl chloride) (r-PVC) as well a... more In current study the blends prepared by utilizing recycled poly(vinyl chloride) (r-PVC) as well as recycled acrylonitrile butadiene styrene (r-ABS) material recovered from e-waste are investigated with respect to property enhancement. Also, nitrile
rubber (NBR) was added to prepared blends of r-(PVC/ABS) as a bridging agent between the optimized blends composition.
The blends was prepared by means of the melt-mixing process and further tensile sample prepared using micro-compounding
process. The superior properties on compatibility between NBR-modifed r-(PVC/ABS) blends were successfully studied
using rheological, mechanical, morphological, thermal, and water absorption analysis studies. The primary analysis of
r-PVC and r-ABS was employed using FTIR analysis. The thermal stability of blends containing 10 wt% NBR was stable
up to 253 ºC. In addition, signifcant enhancement on impact strength of r-(PVC/ABS) blends having 10 wt.% of NBR content. Morphological properties of NBR added based blends presented proper homogenization and properly mixed recycled
polymer-rubber phase in prepared r-(PVC/ABS) blends. The water absorption test results showed rapid ingress of water with
an increase in NBR content in prepared blends. This study provides a novel way towards reuse the polymer from electronic
waste with its improved properties by preparing blends.
Transtech Publication, 2017
Layered double hydroxides (abbreviated as LDHs) are one of the nano-ordered layered compounds. Th... more Layered double hydroxides (abbreviated as LDHs) are one of the nano-ordered layered compounds. The importance of layered compound is based on their ability to retain chemical species with electrical charges compatible to those of the layers. In this study we have reported the synthesis of nano-sized layered double hydroxide (LDH) by co-precipitation method using two different surfactants as cetyl trimethyl ammonium bromide (CTAB) and octadecyl trimethyl ammonium bromide (ODTMA) having different critical micelle concentration (CMC) /chain length and its comparative results on calcined surface modified LDH (CS-LDH). The structure of surface modified layered double hydroxide (CS-LDH) synthesized is unique and has important advantages to the photocatalytic activity. LDH has significant number of application due to their structural, chemical properties etc., these compounds can be used as catalyst, adsorbents, anion exchanger. The photocatalytic activity of prepared surface modified CS-LDH was tested on degradation of the methylene blue (MB) dye in an aqueous solution. The surface characteristics of LDH and CS-LDH were examined using Energy Dispersive X-ray (EDX), Scanning Electron Microscopy (SEM), X-ray diffraction (XRD) and UV-Visible spectrophotometer for Photocatalytic activity under visible light using MB dye. It was observed that highly exfoliated and basal spacing in CS-LDH-ODTMA which enhanced photocatalytic activity (Approx. 60% degradation) than that of comparison to CS-LDH-CTAB (Approx. 32% degradation). Introduction Among the group of minerals referred to as 'Non-Silicate Oxides and Hydroxides' (Newman, 1987), the 'layered double hydroxides' (LDH) have many physical and chemical properties that are surprisingly similar to those of clay minerals. Their layered structure, wide chemical compositions (due to variable isomorphous substitution of metallic cations), variable layer charge density, ion-exchange properties, reactive interlayer space, swelling in water, and rheological and colloidal properties make LDH clay-like. But because of their anion-exchange properties, LDH were referred to as 'anionic clays' Layered double hydroxides (LDHs) are anionic clays also known as 'hydrotalcite-like' compound. The structure of hydrotalcite is related to that of brucite, Mg (OH)2 in which some of the Mg2+