Preparation methods and release kinetics of Litsea cubeba essential oil microcapsules

Abstract

LCEO microcapsules were prepared by various preparation methods such as grinding, saturated solution, freeze-drying, spray-drying with β-CD used as the wall material. Avrami's model was used to simulate the release rates of microcapsules.

A Novel Shell Material—Highland Barley Starch for Microencapsulation of Cinnamon Essential Oil with Different Preparation Methods

“…where M t was the theoretical quality of the microcapsules and Ma was the actual quality of the microcapsules [13].…”

“…In order to evaluate the slow release performance of microcapsules obtained by three different preparation methods, release tests of the CEO were carried out [13]. As shown in Figure 7, the release rates of the three kinds of microcapsules gradually raised with the extension of the storage days.…”

“…Therefore, CEO could be extensively used in the food industry by microcapsulary, which could restrict its inactivation or volatilization during processing and storage [10,11]. In general, the synthesis methods and the types of shell materials were the main factors affecting the packaging effect of microcapsules [12,13].…”

“…Concretely, common physical methods include kneading, saturated aqueous solution, molecular inclusion, freeze-drying, ultrasonic, and spray-drying. The operation steps of the kneading method [14], the saturated aqueous solution method [13], and the ultrasonic method [15] were operated easily, while the encapsulation efficiency (EE) of the synthesized microcapsules was greatly limited. The freeze-drying method [16] and the spray-drying method [17] had higher EE, but the operation steps were cumbersome, and peculiar equipment was needed.…”

Tunable thermal, mechanical, and controlled-release properties of epoxy phenolic novolac resin microcapsules mediated by diamine crosslinkers

“…The measurement for the entrapment efficiencies of the MCs was following a method by adapting Yang et al 28 MC suspensions were accurately weighed and then transferred to a glass bottle. Subsequently, hexane (50 mL) was added and placed the bottle onto a rotary shaker at 70 rpm for 15 min to dissolve the Nd that was outside the MCs.…”