摘要
为改善茶油微胶囊的稳定性,以活化的纳米SiO_(2)、明胶和酪蛋白酸钠为壁材,玉米糖浆为填充剂,单甘酯为乳化剂,茶油为芯材,通过喷雾干燥法制备了茶油微胶囊。考察了纳米SiO_(2)添加量(以明胶质量计,下同)对茶油微胶囊理化性能、热稳定性、表观形态和贮藏稳定性的影响。结果表明,纳米SiO_(2)添加量对制备的茶油微胶囊的含水率和吸水率没有明显影响。当纳米SiO_(2)添加量为3%时,茶油微胶囊的综合性能最佳,平均粒径为(30.55±0.36)μm,包埋率为92.58%,熔融温度171.05℃,平均粒径比未添加纳米SiO_(2)的茶油微胶囊(空白样)减少了7.37%,包埋率和熔融温度分别比空白样增加了4.80%和17.83%。该茶油微胶囊表面形态饱满,多孔结构减弱,具有良好的热稳定性和氧化稳定性。在不同条件下贮藏35 d后过氧化值均最低,50℃时的过氧化值为15.98 mmol/kg,比空白样降低13.14%。氧化动力学研究结果表明,茶油微胶囊适用于一级反应。
In order to improve the stability of camellia oil microcapsules,camellia oil microcapsules were prepared by spray drying using activated nano-SiO_(2),gelatin and sodium caseinate as wall material,corn syrup as filler,monomeric ester as emulsifier and camellia oil as core material.The effects of nano-SiO_(2)additive amount(based on the mass of gelatin,the same below)on the physical and chemical properties,thermal stability,morphology and storage stability of camellia oil microcapsules were investigated.The results showed that nano-SiO_(2) had no obvious effect on water content and water absorption of camellia oil microcapsules.When the additive amount of nano-SiO_(2) was 3%,the comprehensive properties of camellia oil microcapsules were the best.The average particle size was(30.55±0.36)μm,which was decreased by7.37%compared with that of camellia oil microcapsules without addition of nano-SiO_(2)(blank sample).The embedding rate and melting temperature were 92.58%was 171.05℃,respectively,which were improvement of 4.80%and 17.83%compared with those of blank sample,respectively.The surface morphology of camellia oil microcapsules was full and dense without any cracks and the porous structure was weakened.The camellia oil microcapsules had good thermal and oxidative stability.Peroxide value of the camellia oil microcapsules were the lowest after 35 d storage under different conditions.The peroxide value was 15.98 mmol/kg at 50℃,which decreased by 13.14%compared with that of blank sample.The results of oxidation kinetics indicated that the oxidation progress of camellia oil microcapsules was suitable for the first-order reaction.
作者
赵国瑜
范方宇
槐晋东
ZHAO Guoyu;FAN Fangyu;HUAI Jindong(Key Laboratory for Forest Resources Conservation and Utilization,Ministry of Education,College of Life Sciences,Key Laboratory of Forest Disaster Warning and Control of Yunnan Province,Southwest Forestry University,Kunming 650224,Yunnan,China)
出处
《精细化工》
EI
CAS
CSCD
北大核心
2022年第2期367-374,402,共9页
Fine Chemicals
基金
国家自然科学基金(31760470)
云南省“万人计划”青年拔尖人才专项资助(YNWR-QNBJ-2018-046)。
