Surface tension of viscous biopolymer solutions measured using the du Nouy ring method and the drop weight methods

Lee, Boon Beng and Chan, Eng Seng and Pogaku, Ravindra and Khan, Tanveer Ahmad (2012) Surface tension of viscous biopolymer solutions measured using the du Nouy ring method and the drop weight methods. Polymer Bulletin, 69 (4). pp. 471-489. ISSN 0170-0839

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Official URL: http://dx.doi.org/10.1007/s00289-012-0782-2

Abstract

The discrepancy of the existing literature data on the surface tension values of biopolymer solutions could be affected by the measurement technique. The aim of the study was to compare the surface tension values of biopolymer solutions, measured using the du Nouy ring method and the drop weight methods (Harkins-Brown correction factors method and the LCP coefficient method). Four biopolymers were chosen (sodium alginate, carboxymethyl cellulose, xanthan gum and pectin) and the surface tensions of the solutions were measured as a function of biopolymer concentration. The surface tension was found to increase with biopolymer concentration when measured using the du Nouy ring method. On the other hand, the drop weight methods gave an opposite trend. The results verified the discrepancy of the existing literature data. The error may be caused by the correction factors calculation and the solution viscosity when the du Nouy ring method was used. The LCP coefficient method which is independent of correction factors and liquid properties is proposed for measurement of the surface tension of viscous biopolymer solutions.

Item Type:Article
Uncontrolled Keywords:Biopolymer solutions, Drop weight method, Du Nouy ring method, Polysaccharide hydrocolloid, Surface tension, Carboxy-methyl cellulose, Correction factors, Drop weight methods, Harkins-Brown correction factors, LCP coefficient method, Liquid properties, Literature data, Measurement techniques, Ring method, Sodium alginates, Solution viscosity, Surface tension values, Xanthan Gum, Biomoleculesn Biopolymersn Dropsn Surface tension, Solution mining
Subjects:?? TP1080-1185 ??
ID Code:5425
Deposited By:IR Admin
Deposited On:30 Nov 2012 15:45
Last Modified:18 Feb 2015 10:29

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