Synthesis and Application of Acetil-β-cyclodexitrin on Essential Oil
2015
Oliveira, Tiago Brito de | Lobo, Viviane da Silva | Rosa, Mauricio Ferreira da | Bariccatti, Reinaldo Aparecido
This work presents the structural modification of the β-cyclodextrin through acetylation reaction, the spectroscopic characterization of the product (acetyl-β-cyclodextrin) in the mid infrared region, NMR of 1H, 13C and DEPT135, and the use of these compounds on essential oil of clove as photoprotectors and reducers of evaporation loss. The photodegradation experiments were done in alcoholic solutions and both compounds showed good photoprotective properties, although β-cyclodextrin has presented a better performance. In the presence of 5x10-4mol L-1 of β-cyclodextrin was observed a reduction of 72 % in the degradation rate while for the acetyl derivative, in the same concentration, this rate was lowered in 38 %. On the other hand, acetyl-β-cyclodextrin showed very good results in the evaporation assays, lowering the mass loss in 52 % when compared with the oil without this derivative in the same experimental conditions. So, the results presented here point out acetyl-β-cyclodextrin applicability for the complexation of essential oil of clove, reducing its volatility and increasing its photochemical stability.
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