抗氧化剂BHT微胶囊化壁材的选择与优化

本文研究了喷雾干燥法制备高包埋率微胶囊化二丁基羟基甲苯(BHT)的壁材组成。结果最佳壁材组成为:BHT/壁材为20℅、阿拉伯胶/麦芽糊精为1∶3、海藻酸钠含量为0.6℅。

天然食用色素花青素的微胶囊化

研究了喷雾干燥法制备高包埋率微胶囊化花青素的壁材组成以及工艺条件。结果表明,花青素/壁材为25%,明胶/海藻酸钠为1∶4,壳聚糖浓度为0.75%;喷雾干燥的进口温度130℃,出口温度90℃时,花青素的微胶囊化效果最好,包埋率高。微胶囊化花青素的稳定性明显提高。

抗氧化剂二丁基羟基甲苯(BHT)的微胶囊化

研究了喷雾干燥法制备高包埋率微胶囊化二丁基羟基甲苯(BHT)的壁材组成及工艺条件。结果表明,BHT/壁材为20%、阿拉伯胶/麦芽糊精为1∶3、海藻酸钠含量为0.6%、乳化温度为70℃、一级均质压力为20MPa、二级均质压力为45MPa、喷雾干燥进风温度为200℃、出风温度为90℃时,BHT的微胶囊化效果最好,包埋率最高。

鞣质微胶囊化工艺的研究

以鞣质为原料,对其进行微胶囊化,以改善其油溶性,掩盖来自原料的不良风味,提高其稳定性.研究了微胶囊化鞣质的壁材组成及工艺条件.通过单因素实验确定壁材为β-环糊精、乙基纤维素、海藻酸钠组成的复合壁材,采用正交实验确定微胶囊化的最佳工艺条件,结果表明:心材鞣质与复合壁材的质量比为1∶5,β-环糊精与乙基纤维素质量比为6∶1,海藻酸钠与复合壁材质量分数为0.6%,乳化剂与心材鞣质质量分数为0.1%.微胶囊囊壁的局部结构表现为致密的整体结构,说明该产品具有较好的包埋效果.

抗氧化剂二丁基羟基甲苯(BHT)的微胶囊化

研究了喷雾干燥法制备高包埋率微胶囊化二丁基羟基甲苯(BHT)的壁材组成及工艺条件。结果表明,最佳组合为:BHT/壁材20%、阿拉伯胶/麦芽糊精1∶3、海藻酸钠含量0.6%、乳化温度70℃、一级均质压力20MPa、二级均质压力45MPa、喷雾干燥进风温度200℃、出风温度90℃,该工艺条件下BHT的微胶囊化效果最好,包埋率最高。

High frequency properties of Fe_(73.5)Cu_1Nb_3Si_(13.5)B_9/Zn_(0.5)Ni_(0.5)Fe_2O_4 soft magnetic composite with micro-cellular structure

Soft magnetic composite with micro-cellular structure was prepared by spark plasma sintering(SPS) process with Fe73.5Cu1Nb3Si13.5B9 micron-powders clad by 5wt% Zn0.5Ni0.5Fe2O4 nano-particles.The effect of SPS on the micro structure of the Finemet powder and the micro structure of the composite were studied.It has been found that the as-prepared composite consists of Fe73.5Cu1Nb3Si13.5B9 cells and the cell-wall composed of nano Zn0.5Ni0.5Fe2O4 particles distributing around Fe73.5Cu1Nb3Si13.5B9 cell-body.The composite exhibits low eddy-current loss which is to be resulted by high resistivity of the Zn0.5Ni0.5Fe2O4 cell-wall.The sintered samples were annealed at different temperature and the magnetic properties at different frequency of the annealed samples were measured.It shows that the Zn0.5Ni0.5Fe2O4 cell-wall possesses good thermostability.