Kinetics of dissolution of glass fibre in hot alkaline solution

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Abstract

Kinetics of the dissolution of E-glass fibres in alkaline solutions was investigated. To allow an accurate determination of conversion, glass fibres were immersed individually in the corrosive medium and the diameter change was measured with the use of a scanning electron microscope. Few studies have been reported in the literature on the kinetics of E-glass fibre dissolution or the dissolution of individual fibres. The kinetic study of E-glass fibre dissolution in alkaline solutions is scarcely reported in literature, and no investigation is so far conducted regarding individual fibres. Our experimental results fit well in the zero order and shrinking cylinder models, suggesting either the diffusion of hydroxide ions through the solution or the glass fibre etching itself were rate limiting steps. The rate constant for the reaction of glass fibre with alkaline solution at 95 °C was found to be between 1.3 x 10-4 and 4.3 x 10-4 g/(m2.s). The reaction order (n) was determined as 0.31–0.49 with respect to the alkaline solution, and the activation energy was 58−79 kJ/mol.
LanguageEnglish
Number of pages13
JournalJournal of Materials Science
Early online date25 Sep 2017
DOIs
Publication statusE-pub ahead of print - 25 Sep 2017

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Glass fibers
Dissolution
Kinetics
Caustics
Fibers
fiberglass
Etching
Rate constants
Electron microscopes
Activation energy
Scanning
Ions

Keywords

  • E-glass fibres
  • alkaline solutions
  • composite applications
  • fibre-reinforcement
  • material disposal

Cite this

@article{501536ed64ad42a19e1948882297f19d,
title = "Kinetics of dissolution of glass fibre in hot alkaline solution",
abstract = "Kinetics of the dissolution of E-glass fibres in alkaline solutions was investigated. To allow an accurate determination of conversion, glass fibres were immersed individually in the corrosive medium and the diameter change was measured with the use of a scanning electron microscope. Few studies have been reported in the literature on the kinetics of E-glass fibre dissolution or the dissolution of individual fibres. The kinetic study of E-glass fibre dissolution in alkaline solutions is scarcely reported in literature, and no investigation is so far conducted regarding individual fibres. Our experimental results fit well in the zero order and shrinking cylinder models, suggesting either the diffusion of hydroxide ions through the solution or the glass fibre etching itself were rate limiting steps. The rate constant for the reaction of glass fibre with alkaline solution at 95 °C was found to be between 1.3 x 10-4 and 4.3 x 10-4 g/(m2.s). The reaction order (n) was determined as 0.31–0.49 with respect to the alkaline solution, and the activation energy was 58−79 kJ/mol.",
keywords = "E-glass fibres, alkaline solutions, composite applications, fibre-reinforcement, material disposal",
author = "Bashir, {S. T.} and L. Yang and Liggat, {J. J.} and Thomason, {J. L.}",
year = "2017",
month = "9",
day = "25",
doi = "10.1007/s10853-017-1627-z",
language = "English",
journal = "Journal of Materials Science",
issn = "0022-2461",

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TY - JOUR

T1 - Kinetics of dissolution of glass fibre in hot alkaline solution

AU - Bashir, S. T.

AU - Yang, L.

AU - Liggat, J. J.

AU - Thomason, J. L.

PY - 2017/9/25

Y1 - 2017/9/25

N2 - Kinetics of the dissolution of E-glass fibres in alkaline solutions was investigated. To allow an accurate determination of conversion, glass fibres were immersed individually in the corrosive medium and the diameter change was measured with the use of a scanning electron microscope. Few studies have been reported in the literature on the kinetics of E-glass fibre dissolution or the dissolution of individual fibres. The kinetic study of E-glass fibre dissolution in alkaline solutions is scarcely reported in literature, and no investigation is so far conducted regarding individual fibres. Our experimental results fit well in the zero order and shrinking cylinder models, suggesting either the diffusion of hydroxide ions through the solution or the glass fibre etching itself were rate limiting steps. The rate constant for the reaction of glass fibre with alkaline solution at 95 °C was found to be between 1.3 x 10-4 and 4.3 x 10-4 g/(m2.s). The reaction order (n) was determined as 0.31–0.49 with respect to the alkaline solution, and the activation energy was 58−79 kJ/mol.

AB - Kinetics of the dissolution of E-glass fibres in alkaline solutions was investigated. To allow an accurate determination of conversion, glass fibres were immersed individually in the corrosive medium and the diameter change was measured with the use of a scanning electron microscope. Few studies have been reported in the literature on the kinetics of E-glass fibre dissolution or the dissolution of individual fibres. The kinetic study of E-glass fibre dissolution in alkaline solutions is scarcely reported in literature, and no investigation is so far conducted regarding individual fibres. Our experimental results fit well in the zero order and shrinking cylinder models, suggesting either the diffusion of hydroxide ions through the solution or the glass fibre etching itself were rate limiting steps. The rate constant for the reaction of glass fibre with alkaline solution at 95 °C was found to be between 1.3 x 10-4 and 4.3 x 10-4 g/(m2.s). The reaction order (n) was determined as 0.31–0.49 with respect to the alkaline solution, and the activation energy was 58−79 kJ/mol.

KW - E-glass fibres

KW - alkaline solutions

KW - composite applications

KW - fibre-reinforcement

KW - material disposal

U2 - 10.1007/s10853-017-1627-z

DO - 10.1007/s10853-017-1627-z

M3 - Article

JO - Journal of Materials Science

T2 - Journal of Materials Science

JF - Journal of Materials Science

SN - 0022-2461

ER -