Rozpuszczalne w wodzie karbamoiloetylowane pochodne skrobi ziemniaczanej. Cz. I. Synteza i struktura

S. Rupiński; Z. K. Brzozowski; K. Skwara

Published : 2022-09-01

Vol. 50 No. 11-12 (2005)

Water-soluble carbamoylethylated derivatives of potato starch. Part I. Synthesis and structure

S. Rupiński Z. K. Brzozowski K. Skwara

Abstract

Water-soluble starch derivatives (CrES) containing carbamoylethyl groups were synthesized using two methods. The first based on chemical degradation of native potato starch under the influence of KOH or NaOH and subsequent reaction of addition with acryloamide. The other based on carbamoylethylation of native starch in such reaction and subsequent enzymatic biodegradation of CrES obtained using a-amylase. The effects of biodegradation conditions, namely: catalyst type and concentration [Ca(OH)2, KOH], time and temperature of the process and a-amylase concentration on CrES solubility in the water and viscosity of aqueous solutions obtained (Table 1 and 6) as well as on the degree of substitution (DS, Table 2-5). The lowering of molecular weight of starch products after degradation, either chemical or enzymatic one, positively influences the solubility of CrES in water (results of MALDI-TOF measurements, Fig. 1, 2 and 6). The modification causes also the changes in the surface structure of CrES facilitating its dissolution in water (results of SEM microscopic investigations, Fig. 3 and 7). Chemical structure of CrES was confirmed by FT-IR method (Fig. 4, 5 and 8).

Keywords

skrobia ; karbamoiloetylowanie ; stopień podstawienia ; degradacja enzymatyczna ; a-amylaza ; rozpuszczalność w wodzie ; ciężar cząsteczkowy ; struktura powierzchni starch ; carbamoylethylation ; substitution degree ; enzymatic degradation ; a-amylase ; water solubility ; molecular weight ; surface structure

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Rupiński, S., Brzozowski, Z. K., & Skwara, K. (2022). Water-soluble carbamoylethylated derivatives of potato starch. Part I. Synthesis and structure. Polimery, 50(11-12), 821–830. Retrieved from https://polimery.ichp.vot.pl/index.php/p/article/view/1693

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S. Rupiński s_rupinski@o2.pl

Affiliation
Politechnika Warszawska, Wydział Chemiczny, Katedra Chemii i Technologii Polimerów, ul. Koszykowa 75, 00-662 Warszawa

Z. K. Brzozowski

Affiliation
Politechnika Warszawska, Wydział Chemiczny, Katedra Chemii i Technologii Polimerów, ul. Koszykowa 75, 00-662 Warszawa

K. Skwara

Affiliation
Politechnika Warszawska, Wydział Chemiczny, Katedra Chemii i Technologii Polimerów, ul. Koszykowa 75, 00-662 Warszawa