一种微胶囊花青素复合盐的工艺研究

Study on the Process of Embryding Anthocyanin Composite Salt

开发一款稳定性较好的微胶囊花青素复合盐。首先,以黑米花青素、食盐、阿拉伯胶和羟丙基-β-环糊精为原料,以包埋率为指标,采用单因素试验,确定了最佳芯壁比、固形物含量、壁材配比乳化物添加量和均质速度。在此基础上,进一步通过正交试验,确定了其最佳工艺为芯壁比1∶7,固形物含量15%,乳化物含量2%,壁材比3∶2(阿拉伯胶∶羟丙基-β-环糊精),均质速度11000r/min。最后,以包埋率为指标,通过单因素试验,优化了复合盐的喷雾干燥工艺条件,即进风温度180℃,出风温度100℃,进料速度2500mL/h。经过喷雾干燥后,花青素的包埋率为91.31%,其稳定性较包埋前有显著提高。经过微胶囊包埋处理后,微胶囊花青素复合盐成分如下:食盐90%,花青素0.91%,吐温-801.82%,阿拉伯胶3.81%,羟丙基-β-环糊精2.55%。

In this paper,a kind of salt containing anthocyanins with higher stability was explored.First,black anthocyanins,salt,acacia and hydroxypropyl-β-cyclodextrin as main materials,the core-wall ratio,solid shape,wall ratio and emulsion content were explored in term of embedding rate in single factor experiments.Subsequently,the parameters were optimized in an orthogonal experiment.The results were core wall ratio 1∶7,solid content 15%,emulsion content 2%,wall ratio 3∶2(Arabic gum∶hydroxypropyl-β-cyclodextrin)and homogenization speed 11 000 r/min.On this basis,the spray drying process of the salt was optimized in single factor experiments in term of embedding rate,which was inlet air temperature 180℃,outlet temperature 100℃,feed rate 2 500 mL/h.After spray drying,the microcapsules embedding rate of the anthocyanins was 91.31%and the anthocyanins showed higher stability than that before.After microcapsule embedding treatment,the microcapsule anthocyanin complex salt compositions were as follows:salt 90%,anthocyanin 0.91%,Tween-80 1.82%,gum arabic 3.81%and hydroxypropyl-β-cyclodextrin 2.55%.