Effect of microwave treatment on structure of binders based on sodium carboxymethyl starch: FT-IR, FT-Raman and XRD investigations
PBN-AR
Instytucja
Wydział Odlewnictwa (Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie)
Informacje podstawowe
Główny język publikacji
EN
Czasopismo
Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy (30pkt w roku publikacji)
ISSN
1386-1425
EISSN
1873-3557
Wydawca
Pergamon-Elsevier Science Ltd.
DOI
Rok publikacji
2018
Numer zeszytu
Strony od-do
387--393
Numer tomu
199
Link do pełnego tekstu
Identyfikator DOI
Liczba arkuszy
0.5
Autorzy
Pozostali autorzy
+ 3
Słowa kluczowe
EN
FT-IR
polymer binders
microwave radiation
XRD
amorphization
sodium carboxymethyl starch
hydrogen bonds
Streszczenia
Język
EN
Treść
The paper deals with the influence of the microwave treatment on sodium carboxymethyl starch (CMS-Na) applied as a binder for moulding sands. The Fourier transformation infrared spectrometry (FT-IR), Raman spectroscopy (FT-Raman) and XRD analysis data of native potato starch and three different carboxymethyl starches (CMS-Na) with various degree of substitution (DS) before and after exposition to microwave radiation have been compared. FT-IR studies showed that polar groups present in CMS-Na structure take part in the formation of new hydrogen bonds network after water evaporation. However, these changes depend on DS value of the modified starch. The FT-Raman study confirmed that due to the impact on the samples by microwave, the changes of intensity in the characteristic bands associated with the crystalline regions in the sample were noticed. The X-ray diffraction data for microwave treated CMS-Na samples have been compared with the diffractograms of initial materials and analysis of XRD patterns confirmed that microwave-treated samples exhibit completely amorphous structure. Analysis of structural changes allows to state that the binding of sand grains in moulding sand with CMS-Na polymeric binder consists in the formation of hydrogen bonds networks (physical cross-linking).
Cechy publikacji
original article
peer-reviewed
Inne
System-identifier
idp:113488
CrossrefMetadata from Crossref logo
Cytowania
Liczba prac cytujących tę pracę
Brak danych
Referencje
Liczba prac cytowanych przez tę pracę
Brak danych