Formation of Microcapsulated Aluminium Potassium Sulfate Dodecahydrate by Phase Separation Method

Authors

  • Judit Tóth
    Affiliation

    Institute of Materials and Environmental Chemistry, Research Centre for Natural Sciences, Hungarian Academy of Sciences

  • Bence Németh
    Affiliation

    University of Pannonia

  • János Gyenis
    Affiliation

    University of Pannonia

https://doi.org/10.3311/PPch.7589

Abstract

The aim of this study was to produce microencapsulated phase change materials (PCMs) by simple coacervation method. For PCM KAl(SO4)2.12H2O (Alum) and for coating ethyl cellulose (EtC) and poly(methyl methacrylate) (PMMA) were selected. The spherical core particles of 1.25 – 2 mm size were prepared by pan granulation of Alum-water wet pellets. Shell coating was carried out by two different types of coacervation variants. Process I: EtC polymer coacervation was induced from cyclohexane solution reducing the temperature from 81 °C to 25 °C. The polymer shell on the Alum particles surface was incomplete, because during hardening the polymer coatings was shrunken. Process II: Formation of EtC and PMMA shell coating was induced on Alum core surface by solvent change method. The polymer shell was coacervated from their dichloromethane solution by hexane. The water permeability, i. e. the release of Alum was investigated by conductivity measurements.

Keywords:

phase change materials, coacervation, encapsulation, aluminium potassium sulphate dodecahydrate

Published Online

2015-01-12

How to Cite

Tóth, J., Németh, B., Gyenis, J. “Formation of Microcapsulated Aluminium Potassium Sulfate Dodecahydrate by Phase Separation Method”, Periodica Polytechnica Chemical Engineering, 59(3), pp. 201–205, 2015. https://doi.org/10.3311/PPch.7589

Issue

Section

Articles