Modification of the microstructure of the films formed by gamma irradiated starch examined by SEM
PBN-AR
Instytucja
Instytut Chemii i Techniki Jądrowej
Informacje podstawowe
Główny język publikacji
en
Czasopismo
RADIATION PHYSICS AND CHEMISTRY
ISSN
0969-806X
EISSN
Wydawca
PERGAMON-ELSEVIER SCIENCE LTD
DOI
URL
Rok publikacji
2016
Numer zeszytu
Strony od-do
87-95
Numer tomu
118
Liczba arkuszy
Autorzy
(liczba autorów: 2)
Słowa kluczowe
en
starch films
starch-surfactant films
scanning electron microscopy
microstructure mechanical properties
wetting angle
Streszczenia
Język
en
Treść
The paper concerns the effect of gamma irradiation carried out for starch on the microstructure of the films prepared using the starch and its composition with sodium laurate (NaLau) and cetyltrimethylammonium bromide (CTAB) studied by scanning electron microscopy (SEM). Potato starch was irradiated with 60Co gamma rays applying a dose of 30 kGy. Films were prepared by the solution casting method with the addition of 30 wt% glycerol as a plasticizer. Films containing NaLau and CTAB were prepared after performing the procedure, leading to starch–surfactant complexes. Mechanical tests and wetting angle measurements were performed for the films. SEM observations were carried out for the surfaces, fractures and/or sections of the films subjected to chemical fixation and for the dried films. The films obtained using irradiated starch are characterized by a smoother and more homogeneous structure as compared to those based on the non-irradiated starch. Besides, a number of small precipitates were observed on the films surfaces after drying and the number of those precipitates seemed to be higher after irradiation. The results can be related to differences in the microstructure of gels formed on the intermediate step of the films preparation and to the presence of two phases in the system and might serve for explanation of the radiation induced improvement of the hydrophilic/hydrophobic properties, a modification of the mechanical properties of the films, as well as for the changes of those properties resulting after storage.
Cechy publikacji
artykuł oryginalny, recenzowany
Inne
System-identifier
PX-56b48e008106eb71826f8f27
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