假单胞菌多糖为壁材微胶囊的制备

Preparation of Pseudomonas polysaccharides for wall material on microcapsule

对以明胶和假单胞菌PT-8胞外多糖为壁材制备红花油微胶囊的影响因素进行了研究,包括壁材质量浓度、交联剂质量分数、交联时间、壁材质量比、pH。通过单因素试验和正交试验确定最佳制备条件为：壁材质量浓度为50g/L,交联剂质量分数为3%,交联时间为140min,壁材质量比为5∶4,pH为3.6,此条件下微胶囊的包埋率为81.12%。经显微镜观察发现,微胶囊形态圆整,粒径均匀,分散性较好,粒径在1~10μm。假单胞菌PT-8胞外多糖可以作为制备红花油微胶囊的壁材。

The safflower oil microcapsules were prepared with gelatin and Pseudomonas PT 8 extracellular polysaccharide as the wall material, and the factors including wall material quality concentration, mass fraction of crosslinker, crosslinking time, ratio of wall material quality and pH were studied. The best preparation conditions were determined through the single factor test and orthogonal test as follows： the wall material quality concentration was 50 g/mL, the mass fraction of crosslinker was 3%, the curing time was 140 rain, ratio of wall material quality was 5 ： 4, and the pH value of was 3.6. The embedding rate of the microcapsule was 81.12% at such conditions. The microcapsules were spherical, good dispersion, and uniform size between 1-10μm. The results suggested that Pseudornonas PT-8 extracellular polysaccharide could be used for safflower oil microcapsule wall material.