Effect of relative humidity on the store stability of spray-dried beta-carotene nanoemulsions

In order to overcome the limitations of liquid-base emulsion system, beta-carotene nanoemulsions stabilized by modified starch were spray-dried to powders after the emulsification process. The powders showed a good dissolution in water and the reconstituted emulsions had similar particle sizes with...

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Bibliographic Details
Published in:	Food hydrocolloids 2013-12, Vol.33 (2), p.225-233
Main Authors:	Liang, Rong, Huang, Qingrong, Ma, Jianguo, Shoemaker, Charles F., Zhong, Fang
Format:	Article
Language:	eng
Subjects:	Beta-carotene Degradation Film forming property Glass transition temperature Modified starch Nanocomposites Nanoemulsions Nanomaterials Nanostructure Relative humidity Retention Starches
Online Access:	Get full text
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Summary:	In order to overcome the limitations of liquid-base emulsion system, beta-carotene nanoemulsions stabilized by modified starch were spray-dried to powders after the emulsification process. The powders showed a good dissolution in water and the reconstituted emulsions had similar particle sizes with the fresh nanoemulsions. A 30 days storage test was carried out to investigate the effect of relative humility (RH) on the storage stability of beta-carotene powders at 25.0 °C. The beta-carotene degradation profiles over time were found to fit well with a Weibull model and also closely related to the film property of the matrix, moisture sorption property and glass transition temperature of the powder. The results showed that modified starches with lower film oxygen permeability had a higher retention of beta-carotene during storage. The glass transition temperature of powder in different RH also affected the rate of beta-carotene degradation. Overall these results provide useful information for choosing wall materials and storage conditions to protect nutraceuticals in delivery systems. •Beta-carotene nanoemulsion powders were prepared by spray drying.•Storage stability of powders was related to the film properties of wall materials.•The beta-carotene degradation rate was affected by the storage relative humility.•The glass transition temperature was related to the loss of beta-carotene. [Display omitted]
ISSN:	0268-005X 1873-7137