Page 109 - 《精细化工》2019年第11期
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第 11 期 孟祥俭,等: 二甲酸钾微胶囊的构建与缓释抑菌性 ·2257·
2.7 微胶囊的抑菌性能分析 微胶囊质量浓度在 12~48 g/L 之间逐渐增加时,微
图 11 为微胶囊在不同质量浓度下对大肠杆菌 囊中的二甲酸钾浓度逐渐变大,对大肠杆菌的抑制
的抑菌率。可以看出:当微胶囊质量浓度在 12~ 率显著增加,抑菌率最大可以达到 85%;当质量浓
48 g/L 之间,随着浓度的增加对大肠杆菌的抑制率 度大于 48 g/L,微胶囊的聚电解质膜和沸石分子筛
呈直线上升,最高可达 85%,这是因为微胶囊在有 过度吸水,使分子筛中的二甲酸钾在溶液中不能得
效浓度范围内,随着浓度的增大,释放的二甲酸钾 到充分释放,导致抑菌率升高缓慢,达到了抑制大
增多,抑制大肠杆菌生长和繁殖的效果增强;当浓 肠杆菌生长和繁殖的效果,为促进断奶仔猪的生长
度超过 48 g/L,抑菌率缓慢升高,抑菌效果变化不 发育提供了一种新型可行的研究。
明显,这可能是微胶囊浓度过高,聚电解质膜和沸
参考文献:
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物的功效。
(3)通过微胶囊的抗菌性能测试分析得到:当 (下转第 2266 页)