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Energy needs for drying of PAAm- kappa C composites prepared with various kappa C contents

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Energy needs for drying of PAAm- C composites prepared.pdf (331.5Kb)
Date
2011
Author
Pekcan, Önder
Evingür, Gülşen Akin
Abstract
Various polyacrylamide (PAAm) - Kappa Carrageenan (kappa C) composite gels were prepared from acrylamide (AAm) N N'- methylenebisacrylamide (BIS) and different kappa C contents by free radical crosslinking copolymerization in water. Pyranine (P) was introduced as a fluorescence probe and scattered light I-sc and fluorescence intensities I from these gels were monitored during drying at different temperature. The fluorescence intensity of pyranine increased as drying time is increased for all samples. The behavior of I was quantified using the Stern-Volmer equation with moving boundary diffusion model. Desorption coefficient D increased as temperature was increased for a given kappa C content. Supporting gravimetrical and volumetric experiments were also carried out during drying of PAAm-kappa C composite gels. The energy Delta E values were measured for the drying processes for each kappa C content gel by using fluorescence gravimetrical and volumetric methods respectively. It is understood that Delta E values increase by increasing kappa C content indicating that energy needs for the drying of high kappa C content gel is larger than low kappa C content gel.

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https://hdl.handle.net/20.500.12469/985
http://www.e-polymers.org/

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  • Araştırma Çıktıları / Scopus [1319]
  • Araştırma Çıktıları / WOS [1335]
  • Biyoinformatik ve Genetik / Bioinformatics and Genetics [212]

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