Functional and Thermal Analysis of Suberin Isolated from Birch Bark
URI (for links/citations):http://elib.sfu-kras.ru/handle/2311/907
Sudakova, Irina G.
Kuznetsov, Boris N.
Garyntseva, Natalia V.
Pavlenko, Nina I.
Ivanchenko, Natalia M.
(Irina G. Sudakova, Natalia V. Garyntseva, Nina I. Pavlenko, Natalia M. Ivanchenko: Institute of Chemistry and Chemical Technology SB RAS, 42 K. Marx, Krasnoyarsk, 660049 Russia, e-mail: firstname.lastname@example.org; Boris N. Kuznetsov: Institute of Chemistry and Chemical Technology SB RAS, 42 K. Marx, Krasnoyarsk, 660049 Russia, Siberian Federal University, 79 Svobodniy, Krasnoyarsk, 660041 Russia;)
The functional composition and the process of thermal degradation of suberin samples obtained by water-alkaline and alcohol-alkaline hydrolysis of outer birch-bark were studied by IR-spectroscopy, TGA and DTA methods. It was shown that the partial hydrolysis of birch bark occurs in water-alkaline solution, while alcohol-alkaline hydrolysis of bark yields the mixture of suberinic acids. The alcoholalkaline suberin destruction occurs at higher temperatures than that of water-alkaline suberin. The basic weight loss is observed at 340-400 °С and 410-440 °С. At these temperatures the loss of weight is 64 % and 91 % for samples of suberin, obtained by water-alkaline and alcohol-alkaline hydrolysis of outer birch-bark accordingly. It was shown that method of suberin isolation from birch-bark defines the composition, properties and areas of the use of suberinic products.