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Thermally induced gelation of alumina shaping-neutron scattering and rheological measurements

Thermally induced gelation forming based on methylcellulose is recently being explored as a simple and environmentally benign process. Alumina slurry containing 0.1 wt% methylcellulose is subjected to Quasi Elastic Neutron Scattering (QENS) and rheological measurements in gelation temperature regime... Full description

Journal Title: Open Journal of Inorganic Chemistry 2013-04-01, 3卷2期 (Vol.3, Issue 2), pp.48-54
Main Author: Papiya Biswas
Other Authors: Kotikalapudi Rajeswari , Somasani Chaitanya , Roy Johnson , Swapnil A. Prabhudesai , Veerendra K. Sharma , Subhankur Mitra , Ramaprosad Mukhopadhyay
Format: Electronic Article Electronic Article
Language: English
Subjects:
ID: ISSN: 21617406 ; DOI: 10.4236/ojic.2013.32007 ; ISSN: 2161-7406 ; ISSN: 21617406
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recordid: airitilib21617406-201304-201605250046-201605250046-48-54
title: Thermally induced gelation of alumina shaping-neutron scattering and rheological measurements
format: Article
creator:
  • Papiya Biswas
  • Kotikalapudi Rajeswari
  • Somasani Chaitanya
  • Roy Johnson
  • Swapnil A. Prabhudesai
  • Veerendra K. Sharma
  • Subhankur Mitra
  • Ramaprosad Mukhopadhyay
subjects:
  • Ceramics
  • Polymers
  • Heat Treatment
  • Molecular Dynamics
ispartof: Open Journal of Inorganic Chemistry, 2013-04-01, 3卷2期 (Vol.3, Issue 2), pp.48-54
description: Thermally induced gelation forming based on methylcellulose is recently being explored as a simple and environmentally benign process. Alumina slurry containing 0.1 wt% methylcellulose is subjected to Quasi Elastic Neutron Scattering (QENS) and rheological measurements in gelation temperature regimes to evolve a possible mechanism of the forming process. A reduction in diffusivity of water in the slurry from 2.16 to 1.92 × 10^(-5) cm^2.s^(-1) after exposure to 55°C is observed with QENS. This is found to be well correlated with a steep increase in viscosity from 1.2 Pa.s till 50°C to 50,000 Pa.s at 55°C. QENS studies revealed the diffusion of water occurs by jump diffusion with the jump lengths distributed randomly. Further, for the entire sample much longer residence time is found as compared to bulk water, which is due to hydrophilic interaction of water molecules with the methylcellulose in the slurry. Reduction in diffusivity of water along with the steep increase in viscosity could...
language: eng
source:
identifier: ISSN: 21617406 ; DOI: 10.4236/ojic.2013.32007 ; ISSN: 2161-7406 ; ISSN: 21617406
fulltext: fulltext
issn:
  • 21617406
  • 2161-7406
url: Link


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titleThermally induced gelation of alumina shaping-neutron scattering and rheological measurements
creatorPapiya Biswas ; Kotikalapudi Rajeswari ; Somasani Chaitanya ; Roy Johnson ; Swapnil A. Prabhudesai ; Veerendra K. Sharma ; Subhankur Mitra ; Ramaprosad Mukhopadhyay
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descriptionThermally induced gelation forming based on methylcellulose is recently being explored as a simple and environmentally benign process. Alumina slurry containing 0.1 wt% methylcellulose is subjected to Quasi Elastic Neutron Scattering (QENS) and rheological measurements in gelation temperature regimes to evolve a possible mechanism of the forming process. A reduction in diffusivity of water in the slurry from 2.16 to 1.92 × 10^(-5) cm^2.s^(-1) after exposure to 55°C is observed with QENS. This is found to be well correlated with a steep increase in viscosity from 1.2 Pa.s till 50°C to 50,000 Pa.s at 55°C. QENS studies revealed the diffusion of water occurs by jump diffusion with the jump lengths distributed randomly. Further, for the entire sample much longer residence time is found as compared to bulk water, which is due to hydrophilic interaction of water molecules with the methylcellulose in the slurry. Reduction in diffusivity of water along with the steep increase in viscosity could...
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titleThermally induced gelation of alumina shaping-neutron scattering and rheological measurements
descriptionThermally induced gelation forming based on methylcellulose is recently being explored as a simple and environmentally benign process. Alumina slurry containing 0.1 wt% methylcellulose is subjected to Quasi Elastic Neutron Scattering (QENS) and rheological measurements in gelation temperature regimes to evolve a possible mechanism of the forming process. A reduction in diffusivity of water in the slurry from 2.16 to 1.92 × 10^(-5) cm^2.s^(-1) after exposure to 55°C is observed with QENS. This is found to be well correlated with a steep increase in viscosity from 1.2 Pa.s till 50°C to 50,000 Pa.s at 55°C. QENS studies revealed the diffusion of water occurs by jump diffusion with the jump lengths distributed randomly. Further, for the entire sample much longer residence time is found as compared to bulk water, which is due to hydrophilic interaction of water molecules with the methylcellulose in the slurry. Reduction in diffusivity of water along with the steep increase in viscosity could...
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abstractThermally induced gelation forming based on methylcellulose is recently being explored as a simple and environmentally benign process. Alumina slurry containing 0.1 wt% methylcellulose is subjected to Quasi Elastic Neutron Scattering (QENS) and rheological measurements in gelation temperature regimes to evolve a possible mechanism of the forming process. A reduction in diffusivity of water in the slurry from 2.16 to 1.92 × 10^(-5) cm^2.s^(-1) after exposure to 55°C is observed with QENS. This is found to be well correlated with a steep increase in viscosity from 1.2 Pa.s till 50°C to 50,000 Pa.s at 55°C. QENS studies revealed the diffusion of water occurs by jump diffusion with the jump lengths distributed randomly. Further, for the entire sample much longer residence time is found as compared to bulk water, which is due to hydrophilic interaction of water molecules with the methylcellulose in the slurry. Reduction in diffusivity of water along with the steep increase in viscosity could...
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tpages7
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date2013-04-01