Φυσικοχημικός χαρακτηρισμός πηκτινικών μεμβρανών (Bachelor thesis)
Καλαθάκη, Ιάσμη
In the present work the effect of cations and pH have been studied on the
rheological properties of high–methoxyl (HM) pectin solutions and on the
thermophysical and mechanical properties of pectin films. The rheological properties
of the solutions were characterized by means of an Ubbelohde–type viscometer and
a nano–rotational rheometer, while, for the study of the pectin films
thermogravimetric analysis (TGA), differential scanning calorimetry (DSC) and texture
analyzer (TA) have been used.
The humidity of the films has been determined by using Thermogravimetric
analysis (TGA) coupled with while differential scanning calorimetry (DSC), as to
determine the glass transition temperature (Tg). Samples with a higher moisture
content exhibited a lower glass transition temperature than samples with a lower
moisture content. The water dependence of the glass transition temperature of the
polymer and the polymer-salt mixtures was described by the Gordon–Taylor equation.
The glass transition temperature of the films prepared in the presence of multivalent
cation ranked as follows: Tg1 of films with the presence of monovalent cation
| Institution and School/Department of submitter: | Σχολή Τεχνολόγων Γεωπόνων και Τεχνολογίας Τροφίμων και Διατροφής / Τμήμα Τεχνολογίας Τροφίμων |
| Keywords: | πηκτινικές μεμβράνες;φυσικοχημικός χαρακτηρισμός;pH;κατιόντα;ιξωδόμετρο τύπου Ubbelohde;νανο–περιστροφικό ροόμετρο;θερμοσταθμική ανάλυση |
| Description: | Πτυχιακή εργασία--ΣΤΕΤΡΟΔ-Τμήμα Τεχνολογίας Τροφίμων, 2018—9858 |
| URI: | http://195.251.240.227/jspui/handle/123456789/11602 |
| Appears in Collections: | Πτυχιακές Εργασίες |
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http://195.251.240.227/jspui/handle/123456789/11602
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