摘要
利用淀粉酶降解淀粉制备了大孔型的纤维素硫酸钠-聚二甲基二烯丙基氯化铵(NaCS-PDMDAAC)生物微胶囊,改善了该体系胶囊的扩散性能。通过对淀粉预处理方法、淀粉种类、淀粉添加方法以及浓度等制备因素的研究,得到制备大孔膜胶囊的条件为:将1.2%的木薯淀粉糊化3min,冷却得到糊化淀粉的胶体溶液加入NaCS搅拌均匀,滴入PDMDAAC溶液中,待反应结束后洗涤,置于淀粉酶溶液中降解膜上淀粉以形成相应孔径。制备得到的胶囊膜的孔径和孔隙率都有了很大的提高。
A microcapsule made from sodium cellulose sulphate (NaCS) and poly (diallyldimethylammonium chloride) (PDMDAAC) with macropores was prepared by amylase hydrolysis of the starch in capsule and the diffusivity in the microcapsule was improved. Base on the experiments of starch pretreating, selecting, adding method and its concentration, the optimum process for the pore formation was as follow: Gelatinized cassava starch was used as the pore forming agent, the gelatinized time was less than 3 min and the concentration of which is 1.2%. Then the solution of the starch mixed with NaCS and added dropwise into the solution of PDMDAAC. After the capsule was formed, the amylase was added to degrade the starch in the membrane of the capsule. The permeability of the capsule was increased obviously.
出处
《化学反应工程与工艺》
EI
CAS
CSCD
北大核心
2005年第1期65-69,共5页
Chemical Reaction Engineering and Technology
基金
高等学校博士点学科专项科研基金资助(20010335036)
