通过复凝聚法将β-聚苹果酸(PMA)与壳聚糖(CS)作为壁材,制得粒径为200~600nm,分散系数<0.30的具有长久缓释效果的香精微胶囊.通过Plackett-Burman(PB)实验和Box-Benhnken Design(BBD)优化确定了制备缓释型香精微胶囊的最佳工艺条件,得出制备香精微胶囊的最优条件为：壳聚糖浓度1.5g/L,乳化时间45min、转速600r/min、反应时间60min,聚苹果酸浓度为1.0g/L,聚苹果酸(mL)﹕壳聚糖(mL)=1:2,pH值为6.0,滴加速度为7.5mL/h,芯材添加量为1mL/15mL壁材.借助扫描电镜观察与壁材形成的微球形微胶囊,粒径为480.1nm,包埋率为28.57%,缓释效果持续长久.

The paper studies the preparation of the fragrance microcapsule, of diameter in the range of 200-600nm and with the coefficient of dispersion less than 0.30, enjoying a long sustained-release effects, based on β-poly-malic acid (PMA) and chitosan (CS) as the wall materials. The Plackett-Burman design was adopted to select the most important nutrients and Box-Benhnken Design was used to identify the optimum concentrations of the key nutrients. The optimum conditions were determined: the chitosan concentration of 1.5g/L, the emulsification of 45min, the rotational speed of 600r/min, the reaction time of 60min, the poly (malic acid) concentration of 1.0g/L, the ratio of poly (malic acid) to chitosan of 1:2, the pH value of 6.0, the dropping speed of 7.5mL/h, and the core material amount of 1mL. In the SEM observation of the micro-spherical microcapsules, the particle size is 481.0nm, and the embedding ratio is 28.57% with a continuous long-term releasing effect.