摘要
为了制备在虾类配合饲料里能被吸收利用的赖氨酸微胶囊(M-Lys),分别以质量分数为10%的玉米醇溶蛋白(Zein)(溶于75%乙醇溶液,并以3%油酸为包衣液增塑剂)和聚丙烯酸树脂混合液(Resin)(溶于75%乙醇溶液,并以5%柠檬酸三乙酯为包衣液增塑剂)为壁材,采用流化床空气悬浮法制备M-Lys,采用正交实验优化了微胶囊包埋工艺条件:包衣室温度45℃、包衣液速度100mL/min及喷雾压力0.12MPa。在此条件下,所得Zein微胶囊包埋率为82.3%;Resin微胶囊包埋率为80.3%。经SEM观察颗粒外形不规则,大小不均匀,无晶体棱角,结果表明Zein和Resin对多棱角的晶体赖氨酸(C-Lys)具有较好的包埋效果。两种M-Lys在人工模拟胃液60min内赖氨酸的累积溶解释放率分别为16.6%(Zein)和32.8%(Resin),显著低于在相同时间内未包被赖氨酸的溶解率。
In order to prepare microeneapsulation lysine,which could be absorbed and utilized in shrimp feed,the wall materials and the technology of embedding by fluidized bed were studied.The mass fraction of 10% Zein （dissolved in 75% ethanol,and 3% oleic acid as the coating liquid plasticizers）and polyacrylic acid resin mixture （Resin） （dissolved in 75% ethanol and 5% triethyl citrate as the coating liquid plasticizers）as wall material, respectively, used of fluidized bed air suspension prepared M-Lys, orthogonal test to optimize the microencapsulation embedded conditions：coating room temperature 45~C,coating liquid speed lOOmL/min,spray coating liquid pressure 0.12MPa.Under these conditions,Zein and Resin of the microencapsulation embedded rate reached to 82.3% and 80.3%, respectively.By SEM observation of particles of irregular shape, uniform size, no crystal edges and corners,and the results showed that the Zein and Resin of the multi-angular crystalline lysine （C-Lys）has a good embedding results.Two kinds of M-Lys within 60min in artificial gastric juice dissolves the release of lysine accumulation rates were 16.6% （Zein）and 32.8% （Resin）, significantly lower than at the same time,uncoated lysine dissolution rate.
出处
《食品工业科技》
CAS
CSCD
北大核心
2012年第8期252-255,258,共5页
Science and Technology of Food Industry
基金
浙江省国内科技合作与成果引进转化项目(2007d70SA450004)
内蒙古民族大学博士科研启动基金(BS255)
关键词
微胶囊
流化床
晶体赖氨酸
工艺优化
缓释
microencapsulation
fluidized bed
crystalline lysine
process optimization
release
