CN104304845A - β-胡萝卜素微胶囊的制备方法 - Google Patents
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Abstract
本发明涉及一种β-胡萝卜素的制备方法,属于食品添加剂及其制备方法领域。所述的β-胡萝卜素微胶囊的制备方法,该方法包括以下步骤:(1)按配比称取明胶、蔗糖溶于热水中,配成浓度为20%的溶液;(2)先用植物油高温溶解β-胡萝卜素,再加入无水乙醇稀释,搅拌均匀;(3)然后进行喷雾干燥,制成微胶囊产品即β-胡萝卜素微胶囊。本发明所述的β-胡萝卜素微胶囊的制备方法,出粉率达到91.88%,包埋率达到95.89%,自然光照条件下12天的保留率达86.25%,并且成本低,操作简便,易于大规模生产。
Description
技术领域
本发明涉及一种β-胡萝卜素的制备方法,属于食品添加剂及其制备方法领域。
背景技术
微胶囊技术是指通过特定的工艺手段将固体、气体或液体包裹在一个微小密闭的胶囊之中的技术。通过微胶囊化可以减轻外界环境对敏感心材的影响程度、提高储存性能、改善可操作性、掩盖异味。被包囊的物质称为心材,包裹物质称之为壁材。微胶囊的直径一般在2-200μm,壁厚为0.5-150μm。
β-胡萝卜素无论从天然资源中的分布,还是从其生理价值与应用价值的重要性方面都是有近600个种类的类胡萝卜素大家族中最重要的一员。目前,虽然生产β-胡萝卜素均已实现大规模工业化生产,但在具体运用到食品工业中作为功能性添加剂或天然色素使用时仍存在不少问题,最主要表现在两个方面,第一是贮存的稳定性(β-胡萝卜素对光、热、空气敏感,加工过程中易损失),第二是溶解性(β-胡萝卜素为油溶性,在生产过程中造成很大的不便),而微胶囊技术可以很好的解决这两方面的问题。
目前应用于食品工业中的微胶囊化方法有:喷雾干燥法、喷雾冷却固化法、水相相分离法、油相相分离法、挤压法、分子微胶囊法、气体悬浮涂裹法、多重乳状液法、吸附法、胶体冷却凝固粉碎法,而喷雾干燥法以其操作简单、生产成本较低、生产全过程密闭、产品溶解性好、适用于工业化生产等显著优点,已成为目前国内最普遍应用的微胶囊化方法。
微胶囊化的第一步是将β-胡萝卜素制备成均一的分散体系。β-胡萝卜素是以晶体形式存在,仅微溶于油脂,如直接以晶体形式制备稳定分散体系十分困难。而喷雾产品品质优劣的关键就是喷雾前能否形成稳定的乳化体系。本发明所述的方法采用少量植物油溶解β-胡萝卜素,再采用大量乙醇稀释改变其物理形态,制成分散体系,然后进行喷雾干燥。
作为水溶性天然色素形式的微胶囊产品,其壁材必须具有良好的溶解性才有应用价值。喷雾干燥法微胶囊所用壁材最主要为胶类和糊精。要求它们有很好的乳化性、成膜性、粘度低且不易吸潮,而常用壁材中,酪蛋白乳化力很强但溶解性不好,酪蛋白酸钠乳化能力溶解性好,但价格太高。明胶是亲水胶体,也是一种重要蛋白源,并具有较好的乳化性和成膜性且易溶于水,符合作为微胶囊壁材中封闭性蛋白源的要求,而且价格低来源广。与蛋白质壁材相配伍的碳水化合物,由于糊精与明胶协调性不好,微胶囊化过程的效率与产率均不理想,因此本发明所述的制备方法选用明胶与蔗糖复合物作为壁材,可得到很好的微胶囊化效果的。
发明内容
本发明旨在提供一种出粉率高,包埋率高,保留时间长,并且成本低,操作简便,易于大规模生产的β-胡萝卜素微胶囊的制备方法。
本发明所述的β-胡萝卜素微胶囊的制备方法,包括以下步骤:
(1)按配比称取明胶、蔗糖溶于热水中,配成浓度为20%的溶液;
(2) 先用植物油高温溶解β-胡萝卜素,再加入无水乙醇稀释,搅拌均匀;
(3)然后进行喷雾干燥,制成微胶囊产品即β-胡萝卜素微胶囊。
优选的,本发明所述的步骤(1)中的明胶与蔗糖重量比为3:17,热水温度为70-80℃。
更优选的,本发明所述的步骤(2)中的溶解温度为100-120℃,植物油的用量为β-胡萝卜素的5倍,无水乙醇用量为β-胡萝卜素的20倍。
进一步优选的,本发明所述的步骤(3)中的喷雾干燥参数为进风温度为185℃,风速为75-85m/s,喷雾压为185Kpa。
微胶囊化的第一步是将β-胡萝卜素制备成均一的分散体系。β-胡萝卜素是以晶体形式存在,仅微溶于油脂,如直接以晶体形式制备稳定分散体系十分困难。而喷雾产品品质优劣的关键就是喷雾前能否形成稳定的乳化体系。本发明所述的方法先采用少量植物油溶解β-胡萝卜素,再采用大量乙醇稀释改变其物理形态,制成分散体系,利用乙醇既能溶解有机物又能溶于水的性质,使乙醇亲油基与亲油性的口一胡萝卜素相结合,亲水基扩张在外,这样使β-胡萝卜素表面形成亲水层,这样就可以溶于水,形成分散体系。
作为水溶性天然色素形式的微胶囊产品,其壁材必须具有良好的溶解性才有应用价值。喷雾干燥法微胶囊所用壁材最主要为胶类和糊精。要求它们有很好的乳化性、成膜性、粘度低且不易吸潮,而常用壁材中,酪蛋白乳化力很强但溶解性不好,酪蛋白酸钠乳化能力溶解性好,但价格太高。明胶是亲水胶体,也是一种重要蛋白源,并具有较好的乳化性和成膜性且易溶于水,符合作为微胶囊壁材中封闭性蛋白源的要求,而且价格低来源广。与蛋白质壁材相配伍的碳水化合物,由于糊精与明胶协调性不好,微胶囊化过程的效率与产率均不理想,因此本发明所述的制备方法选用明胶与蔗糖复合物作为壁材,可得到很好的微胶囊化效果的。
本发明所述的β-胡萝卜素微胶囊的制备方法,出粉率达到91.88%,包埋率达到95.89%,自然光照条件下12天的保留率达86.25%,并且成本低,操作简便,易于大规模生产。
具体实施方式
实施例一:
按重量比为3:17称取明胶、蔗糖溶于75℃热水中,配成浓度为20%的溶液;然后先用重量5倍于β-胡萝卜素的植物油在110℃高温溶解β-胡萝卜素,再加入重量20倍于β-胡萝卜素的无水乙醇稀释,搅拌均匀, 使体系乳化分散均一;然后在进风温度为185℃、风速为75-85m/s、喷雾压为185Kpa的条件下进行雾干燥,制成微胶囊产品即β-胡萝卜素微胶囊。
经测定,本实施例所述的β-胡萝卜素微胶囊的制备方法,出粉率达到91.88%,包埋率达到95.89%,自然光照条件下12天的保留率达86.25%。
Claims (4)
1.β-胡萝卜素微胶囊的制备方法,该方法包括以下步骤:
(1)按配比称取明胶、蔗糖溶于热水中,配成浓度为20%的溶液;
(2) 先用植物油高温溶解β-胡萝卜素,再加入无水乙醇稀释,搅拌均匀;
(3)然后进行喷雾干燥,制成微胶囊产品即β-胡萝卜素微胶囊。
2. 如权利要求1所述的β-胡萝卜素微胶囊的制备方法,其特征在于所述的步骤(1)中的明胶与蔗糖重量比为3:17,热水温度为70-80℃。
3. 如权利要求1所述的β-胡萝卜素微胶囊的制备方法,其特征在于所述的步骤(2)中的溶解温度为100-120℃,植物油的用量为β-胡萝卜素的5倍,无水乙醇用量为β-胡萝卜素的20倍。
4. 如权利要求1所述的β-胡萝卜素微胶囊的制备方法,其特征在于所述的步骤(3)中的喷雾干燥参数为进风温度为185℃,风速为75-85m/s,喷雾压为185Kpa。
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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CN105747216A (zh) * | 2016-03-03 | 2016-07-13 | 广州市食品工业研究所有限公司 | 一种微胶囊β-胡萝卜素粉末及其制备方法 |
CN105876792A (zh) * | 2016-04-19 | 2016-08-24 | 东北农业大学 | 一种新型β-胡萝卜素微胶囊的制备方法 |
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
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CN105747216A (zh) * | 2016-03-03 | 2016-07-13 | 广州市食品工业研究所有限公司 | 一种微胶囊β-胡萝卜素粉末及其制备方法 |
CN105876792A (zh) * | 2016-04-19 | 2016-08-24 | 东北农业大学 | 一种新型β-胡萝卜素微胶囊的制备方法 |
CN105876792B (zh) * | 2016-04-19 | 2019-09-17 | 东北农业大学 | 一种新型β-胡萝卜素微胶囊的制备方法 |
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