Effect of encapsulation of d-limonene on the moisture adsorption property of β-cyclodextrin

Abstract

The effect of encapsulation of d-limonene (0, 3.0 g/100 g, 7.5 g/100 g and 9.68 g/100 g) on the moisture adsorption property of β-cyclodextrin (β-CD) were studied. The increasing limonene oil content significantly lowered the moisture adsorption capacity of β-CD, which was probably caused by the decreased moisture adsorption sites and monolayer moisture content of β-CD molecules. However, the values of net isoteric heat of adsorption were increased after the β-CD was complexed with the limonene oil, indicating the energy of the remaining water molecule binding sites of β-CD were stronger. Samples at all level of oil encapsulations showed a sigmoid type (type II) adsorption and the GAB model ..