| Title |
Anijoninio krakmolo sandaros įtaka netirpių polimerų kompleksų susidarymui / |
| Translation of Title |
The influence of anionic starch structure on formation of insoluble polymeric complexes. |
| Authors |
Vilkaitė, Sigita |
| Full Text |
|
| Pages |
74 |
| Keywords [eng] |
anionic hydroxyethyl starch ; fluorescence spectroscopy ; polymer complexes |
| Abstract [eng] |
In this study, water soluble anionic hydroxyethyl starch with degree of substitution of 0.25 and 0.49 were obtained through hydroxyethyl etherification reaction with sodium chloroacetic acid in an alkaline environment. Anionic hydroxyethyl starches with degree of substitution of 0.25 and 0.49 were then modified with 5-aminofluorescein and new fluorescein modified anionic hydroxyethyl starches were obtained. Steady-state and time-resolved fluorescence spectroscopy experiments performed on water soluble anionic hydroxyethyl starches by using fluorescent probe pyrene revealed that conformational changes of polyelectrolytes in water are reflected by the changes of fluorescence parameters. By the interactions of anionic hydroxyethyl starches and polycation poly(dialyldimethylammonium chloride) non-soluble polyelectrolyte complexes were formed in water. The zeta potential, particle size and scanning electron microscopy measurements showed that the resulting non-stoichiometric polyelectrolyte complex submicron-sized particles are positively charged in acidic medium and negatively charged in neutral and basic media. The technological process for manufacturing of anionic hydroxyethyl starch/poly(diallyldimethylammonium chloride) particles to produce 109,44 kg of product per day has been proposed. |
| Dissertation Institution |
Kauno technologijos universitetas. |
| Type |
Master thesis |
| Language |
Lithuanian |
| Publication date |
2016 |
