Abstract
High methoxyl pectin (HMP) gelation was investigated by small amplitude oscillatory experiments. The system studied was 1%HMP + 60%sucrose (citrate buffer, pH 3). Time sweep experiments and mechanical spectra were performed at different temperatures between 5°C and 60°C. The gel time and the shear modulus have a complex dependence on temperature, which could be explained by the opposing effects of increasing temperature on both types of interactions that stabilise the HMP gels. The 'final' viscoelastic behaviour of the HMP gels also changes with the ageing temperature at which the system has been submitted. Between 15-50°C the behaviour is typical of a true gel, but for lower and higher temperatures, the behaviour changes to that of weak gels, with higher dependence on frequency for the dynamic moduli.
| Original language | English |
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| Title of host publication | Cellulose and cellulose derivatives |
| Subtitle of host publication | Cellucon '93 proceedings: physico-chemical aspects and industrial applications |
| Editors | John F. Kennedy, Glyn O. Phillips, Peter A. Williams |
| Place of Publication | United Kingdom |
| Publisher | Woodhead Publishing Limited |
| Pages | 279-285 |
| Number of pages | 7 |
| ISBN (Print) | 9781855732124 |
| DOIs | |
| Publication status | Published - 1993 |
| Event | International Conference on Cellulose and Cellulose Derivatives: Physico-Chemical Aspects and Industrial Applications - University of Lund, Lund, Sweden Duration: 1 Jan 1993 → 1 Jan 1993 |
Conference
| Conference | International Conference on Cellulose and Cellulose Derivatives |
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| Country/Territory | Sweden |
| City | Lund |
| Period | 1/01/93 → 1/01/93 |