TY  - CONF
AU  - Karić, Nataša
AU  - Gržetić, Jelena
AU  - Kovačević, Tihomir
AU  - Marinković, Aleksandar
PY  - 2019
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/6121
AB  - The starch oxidation involves oxidation of primary or secondary hydroxyl to carbonyl
or carboxyl groups, whereas the number of these groups indicates the level of oxidation.
Oxidized starch is used as surface sizing agent and coating binder in the paper industry,
or as polymeric filler that increases the polymer degradability. The main objective of the
presented study is to investigate the effects of various parameters on the oxidation
process of the wheat starch, using dry method (Fig. 1). These parameters include
oxidizer concentration, catalyst type (iron(II) sulphate, copper(II) sulphate and
copper(II) citrate), presence of plasticizers/modifiers (ricinoleic acid, (R-(Z))-12-
hydroxy-9-octadecenoic acid, RA) and diizopropyl tartarate ((dipropan-2-yl 2,3-
dihydroxybutanedioate, DIPT) and reaction temperature (20 and 80 °C). The obtained
results suggest that higher values of carbonyl and carboxyl groups lead to an increase of
swelling capacity and solubility, while viscosity decreases, compared to the native wheat
starch. The analysis of FTIR spectra, especially region of carbonyl/carboxyl groups
absorption, reveals high impact of process parameters on the oxidation degree and band
structure. The morphology of native and oxidized starches, investigated by the SEM
method, shows that after oxidation the surface of the starch particles becomes smoother
then for the native starch, with aggregation of small and large-sized granules.
C3  - 7th Conference of the Young Chemists of Serbia
T1  - Preparation and characterization of oxidized wheat starch with hydrogen peroxide as an environmentally friendly oxidant
SP  - 144
UR  - https://hdl.handle.net/21.15107/rcub_technorep_6121
ER  - 

@conference{
author = "Karić, Nataša and Gržetić, Jelena and Kovačević, Tihomir and Marinković, Aleksandar",
year = "2019",
abstract = "The starch oxidation involves oxidation of primary or secondary hydroxyl to carbonyl
or carboxyl groups, whereas the number of these groups indicates the level of oxidation.
Oxidized starch is used as surface sizing agent and coating binder in the paper industry,
or as polymeric filler that increases the polymer degradability. The main objective of the
presented study is to investigate the effects of various parameters on the oxidation
process of the wheat starch, using dry method (Fig. 1). These parameters include
oxidizer concentration, catalyst type (iron(II) sulphate, copper(II) sulphate and
copper(II) citrate), presence of plasticizers/modifiers (ricinoleic acid, (R-(Z))-12-
hydroxy-9-octadecenoic acid, RA) and diizopropyl tartarate ((dipropan-2-yl 2,3-
dihydroxybutanedioate, DIPT) and reaction temperature (20 and 80 °C). The obtained
results suggest that higher values of carbonyl and carboxyl groups lead to an increase of
swelling capacity and solubility, while viscosity decreases, compared to the native wheat
starch. The analysis of FTIR spectra, especially region of carbonyl/carboxyl groups
absorption, reveals high impact of process parameters on the oxidation degree and band
structure. The morphology of native and oxidized starches, investigated by the SEM
method, shows that after oxidation the surface of the starch particles becomes smoother
then for the native starch, with aggregation of small and large-sized granules.",
journal = "7th Conference of the Young Chemists of Serbia",
title = "Preparation and characterization of oxidized wheat starch with hydrogen peroxide as an environmentally friendly oxidant",
pages = "144",
url = "https://hdl.handle.net/21.15107/rcub_technorep_6121"
}

Karić, N., Gržetić, J., Kovačević, T.,& Marinković, A.. (2019). Preparation and characterization of oxidized wheat starch with hydrogen peroxide as an environmentally friendly oxidant. in 7th Conference of the Young Chemists of Serbia, 144.
https://hdl.handle.net/21.15107/rcub_technorep_6121

Karić N, Gržetić J, Kovačević T, Marinković A. Preparation and characterization of oxidized wheat starch with hydrogen peroxide as an environmentally friendly oxidant. in 7th Conference of the Young Chemists of Serbia. 2019;:144.
https://hdl.handle.net/21.15107/rcub_technorep_6121 .

Karić, Nataša, Gržetić, Jelena, Kovačević, Tihomir, Marinković, Aleksandar, "Preparation and characterization of oxidized wheat starch with hydrogen peroxide as an environmentally friendly oxidant" in 7th Conference of the Young Chemists of Serbia (2019):144,
https://hdl.handle.net/21.15107/rcub_technorep_6121 .