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明胶/阿拉伯胶香精微胶囊的制备

时间:2020-04-28 21:04来源:毕业论文
以明胶和阿拉伯胶作为壁材原料包覆以草香香精作为芯材原料,制备得到香精微胶囊。通过微胶囊的产量,包埋率和包埋效率以及显微镜下拍的微胶囊的照片

摘要: 本文主要研究以明胶/阿拉伯胶为水溶性壁材,制备与肌肤和头发有较好亲和力的香精微胶囊,同时探究了形成此微胶囊的最佳实验条件。本实验是用复合凝聚法将以明胶和阿拉伯胶作为壁材原料包覆以草香香精作为芯材原料,制备得到香精微胶囊。通过微胶囊的产量,包埋率和包埋效率以及显微镜下拍的微胶囊的照片,得出制备微胶囊的最优条件为溶液pH为3.5,溶液浓度为1.0%,芯壁比为2:1,固化剂为戊二醛,固化剂用量为2.0ml。在此条件下,微胶囊多为球形,表面十分光滑、大小较均一,微胶囊囊壁较完整且清晰,无破损,包埋率高,包埋率最高为47.84%。58201

毕业论文关键字: 明胶;阿拉伯胶;香精;复合凝聚法

Preparation of gelatin / gum arabic essence microcapsule

Abstract: this topic research purpose and significance of gelatin-gum arabic microcapsules, which have good affinity to our skins and hair, at the same time , l explored the best experimental conditions of the formation of the essence. This experiment is the gelatin and the arabic gum as the wall material, essence as rawl materials, was prepared using complex coacervation to produce the gelatin-gum arabic microcapsules. Through the output of the microcapsules,embedding rate and encapsulation efficiency,the microcapsule photos under the microscope,it is concluded that the best condition of preparing the microcapsules is the solution pH is 3.5, the solution concentration is 1.0%, the ratio of the core wall is 2:1, the curing agent is glutaraldehyde, the curing agent dosage is 2.0ml.Under these conditions, the microcapsules are almostly spherical, the surface is very smooth, The capsule wall are more complete and clear, and no damage, the microcapsules have high embedding rate, and the rate of encapsulation  47.84%.

Keywords: gelatin, arabic gum, essence,complex coacervation process

目录

1 绪论 1

1.1 微胶囊的概述 1

1.1.1 微胶囊的定义 1

1.1.2 微胶囊的基本形态和分类 1

1.2 常用微胶囊化方法 2

1.2.1 化学 2

1.2.2 物理 2

1.2.3 物理化学法 2

1.3 复合凝聚法的概述 3

1.3.1 缓释型香精微胶囊 3

1.3.2 复凝聚法的基本原理 3

1.3.3明胶/阿拉伯胶复凝聚法(GE/GA法) 4

1.4 微胶囊制备过程中主要影响因素 4

1.4.1 溶液pH值对微胶囊的影响 4

1.4.2 壁材的选择对微胶囊的影响 4

1.4.3 固化剂对微胶囊的影响 5

1.5 本课题的研究的意义和研究内容 5

2 实验原理和方法 7

2.1 实验原料及仪器 7

2.1.1 实验原料 7

2.1.2 实验仪器 7

2.2 实验原理 8

2.3 实验方案的确定 8

3 实验内容 11

3.1 空白胶囊的制备 11

3.3 芯壁比对微胶囊制备的影响 明胶/阿拉伯胶香精微胶囊的制备:/huaxue/lunwen_50729.html

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