Preparation of Microcapsules Containing β-Carotene with Thermo Sensitive Curdlan by Utilizing Reverse Dispersion

Abstract

We have tried to microencapsulate β-carotene with curdlan of a thermogelation type polysaccharide. Microcapsules were prepared by utilizing reverse dispersion, in which salada oil was the continuous phase (O’) and the curdlan water slurry (W) was the dispersed phase. β-carotene (O) as a core material was broken into fine oil droplets in the dispersed phase to form the (O/W) dispersion. The (O/W) dispersion was poured in the continuous phase (O’) and stirred to form the (O/W)/O’ dispersion at room temperature and then, temperature of the dispersion was raised to 80 °C to prepare curdlan-microcapusles containing β-carotene. In this microencapsulation process, the concentrations of curdlan and oil soluble surfactant and the impeller speed to form the (O/W)/O’ dispersion were mainly changed stepwise. We were able to prepare microcapsules by the microencapsulation method adopted here. The content of core material was increased with the curdlan concentration and decreased with the impeller speed and the oil soluble surfactant concentration. With the curdlan concentration, the drying rate of microcapsules was decreased and the retention ability for water was increased due to the stable preservation of β-carotene.

Preparation of Microcapsules Containing Camellia Oil with Heterocoagulation between Chitosan and Oleic Acid

“…For example, many kinds of oil species have been microencapsulated with the interfacial gelling reaction method [11] [12] [13], the in-situ polymerization method [14] [15], the interfacial polycondensation reaction method [16] [17], the coacervation method [18] [19], the spray-dried method [20] [21] [22] and the melting dispersion cooling method [23]. These microcapsules have been applied to the textiles, fragrance, aromatherapy, antibiosis and so on.…”

Development of Preparation Method for Microencapsulating Uycalyptus Oil Containing Fine Aqueous Droplets by Use of Interfacial Condensation Reaction between Hydroxy Propyl Methyl Cellulose and Tannic Acid

“…Furthermore, it will be expected that the microcapsules containing the uycalyptus oil have to develop the new fields and the applicable fields of oil will be dramatically increased. Until now, many kinds of oil species have been microencapsulated with the chemical methods such as interfacial gelling reaction method [11]- [13], the in-situ polymerization [14] [15], the interfacial polycondensation reaction [16] [17] and the physicochemical methods such as the coacervation method [18] [19], the spray-dried method [20]- [22], and the melting dispersion-cooling method [23]. In these preparation methods, a few harmful chemical species have been used and the complicated processes have been applied.…”