Open Access

ARTICLE

Ultrasound-Assisted Synthesis of Sucrose and Fructooligosaccharides Esters as Bio-Plasticizers

Dragomir Vassilev^1*, Nadezhda Petkova², Milena Koleva¹, Panteley Denev²

1 Technical University of Gabrovo, 4 Hadji Dimitar Str., 5300 Gabrovo, Bulgaria
2 University of Food Technologies, 26 Maritza Blvd., 4002 Plovdiv, Bulgaria

* Corresponding author:

Journal of Renewable Materials 2016, 4(1), 24-30. https://doi.org/10.7569/JRM.2015.634125

Abstract

This article presents the results obtained by the ultrasound-assisted synthesis of sucrose and fructooligosaccharides (FOS) esters with fatty acids (palmitic and 10-undecylenic), the identifi cation of the products and the study of their possible application as plasticizers in plastics processing. Fourier transform infrared spectroscopy (FTIR) and nuclear magnetic resonance (¹H and ¹³C NMR) spectroscopy were used to identify the synthesized carbohydrate esters. The plasticizing effect of the sucrose palmitate applied in polyvinyl chloride (PVC) was evaluated by the glass transition temperatures; the decrease of the T_g with the increase of the ester content could be accepted as confi rmation of the esters’ plasticizing effect.
The antimicrobial activity of the synthesized sucrose and FOS esters was evaluated; the results allowed us to conclude that the 10-undecynoyl esters of sucrose and fructooligosaccharides could be successfully applied as potential antimicrobial agents, as well. The sucrose palmitate plasticizing effect was evaluated by determining the glass transition temperatures of thin polyvinyl chloride fi lms on the basis of differential scanning calorimetry (DSC) and changes of mechanical properties. The results showed a decrease of the glass transition temperature with the increase of the ester content, which confirmed the plasticizing effect of the obtained esters.

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Keywords

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