Prediction models for shape and size of ca-alginate macrobeads produced through extrusion-dripping method

Chan, Eng Seng and Boon, Beng Lee and Pogaku, Ravindra and Denis, Poncelet (2009) Prediction models for shape and size of ca-alginate macrobeads produced through extrusion-dripping method. Journal of Colloid and Interface Science, Volume 338, Issue 1, 1 October 2009, Pages 63-72 (1). pp. 63-73. ISSN 0021-9797

[img]
Preview
PDF
202Kb

Official URL: http://dx.doi.org/10.1016/j.jcis.2009.05.027

Abstract

The aim of this work was to develop prediction models for shape and size of ca-alginate macrobeads produced through extrusion-dripping method. The relationship between the process variables on the shape and size of the alginate drops before and after gelation was established with the aid of image analysis. The results show that a critical Ohnersorge number (Oh) > 0.24 was required to form spherical beads. The shape transition of ca-alginate beads could be typically distinguished into three phases along the collecting distance and it was affected by the combined influence of the solution properties, the collecting distance and the drop size. Mathematical equations and a master shape diagram were developed to reveal a clear operating region and the overall process limits within which spherical ca-alginate beads could be formed. In terms of bead size, the overall size correction factor (K) which accounted for the liquid loss factor (kLF) and the shrinkage factor (kSF), varied between 0.73 and 0.85 under the experimental conditions. The size prediction model correlated well with the experimental data. The approach and the outcome could be used as a model to develop prediction tools for similar bead production systems. © 2009 Elsevier Inc. All rights reserved.

Item Type:Article
Uncontrolled Keywords:Bead, Bead size, Before and after, Ca-alginate, Ca-alginate bead, Correction factors, Drop size, Experimental conditions, Experimental data, Loss factor, Macrobeads, Mathematical equations, Operating regions, Prediction model, Prediction tools, Process limits, Process Variables, Production system, Shape, Shape and size, Shape transitions, Shrinkage factors, Size, Solution property, Spherical beads, Three phasis
Subjects:?? QR1-74.5 ??
Divisions:SCHOOL > School of Engineering and Information Technology
ID Code:2597
Deposited By:IR Admin
Deposited On:30 Mar 2011 12:38
Last Modified:24 Feb 2015 10:29

Repository Staff Only: item control page


Browse Repository
Collection
   Articles
   Book
   Speeches
   Thesis
   UMS News
Search
Quick Search

   Latest Repository

Link to other Malaysia University Institutional Repository

Malaysia University Institutional Repository