CN109021298A - 一种以碱性氨基酸为双正极***联剂的可食性淀粉膜 - Google Patents
一种以碱性氨基酸为双正极***联剂的可食性淀粉膜 Download PDFInfo
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
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Abstract
本发明公开了一种以碱性氨基酸为双正极***联剂的可食性淀粉膜。该淀粉膜的技术特征是:(A)淀粉稀释液中加入质量分数为0.2~5%的碱性氨基酸作为双正极***联剂;(B)加入增塑剂、增强剂、功能改性剂,充分匀浆,加热糊化一定时间后形成的糊化液经超声脱气,涂布,脱水干燥成膜;(C)加入碱性氨基酸交联剂的淀粉膜,比不加入该交联剂的淀粉膜具有安全可食用、材料来源广泛、产品生产工艺简单、成本可控的特点。
Description
技术领域
本发明涉及一种以碱性氨基酸为双正极***联剂的可食性淀粉膜。该淀粉膜采用赖氨酸、精氨酸、组氨酸作为促进淀粉分子聚合的双正极***联剂,可应用食品包装,属于食品加工、包装领域。
背景技术
人们采用石油基塑料中掺入20~30%的聚乳酸的方法,形成环境“可分解”的方便包装材料。然而其本质上仍然是塑料制品,对食品还会有塑化剂、单体等迁移污染的风险。
淀粉基质包装膜分为两种。一种是土豆淀粉、玉米淀粉等,通过添加改性剂提高淀粉膜的机械性能,改善化学特性。另一种是传统上以柔软的糯米膜包装糖果,其对机械性能和阻隔性能要求不高。
淀粉基质膜改性,包括直接对淀粉化学修饰改性,添加甘油、甘露醇、木糖醇等塑化剂,添加羧甲基纤维素钠、海藻酸钠、明胶等增强剂,添加壳聚糖、醇溶蛋白等功能改性剂。现有的淀粉膜受到其使用性能、成本限制,还没有规模化进入食品包装行业。
淀粉分子作为具有多羟基结构的链状多糖,其胶体液中具有呈现电负性倾向,糊化成膜过程中的交联作用弱、容易脱水老化,影响淀粉膜质量。蛋白质对淀粉膜的改性具有有限的效果。利用具有双正极性氨基的碱性氨基酸作为交联剂掺入到淀粉膜中,与淀粉电负性的多羟基结构形成静电相互作用,可促进成膜淀粉分子交联效果,改进淀粉基质膜的理化性能。
发明内容
本发明的目的是提供一种以碱性氨基酸为双正极***联剂的可食性淀粉膜,该淀粉膜具有机械性能及其它物理性能和营养功能强于未使用碱性氨基酸交联剂淀粉膜的特性。
本发明的目的是通过以下的技术方法来实现的:
A、将淀粉配制成稀释液,加入质量分数为0.2~5%的碱性氨基酸作为双正极***联剂;
B、加入增塑剂、增强剂、功能改性剂,充分匀浆,加热糊化一定时间后的糊化液超声脱气,涂布,脱水干燥成膜。
所述的碱性氨基酸包括赖氨酸、精氨酸、组氨酸,可选择任意一种或几种协同作用。
所述的淀粉包括玉米淀粉、马铃薯淀粉、魔芋粉、修饰淀粉及其它淀粉或其复合淀粉。
所述的增塑剂为丙三醇、甘露糖醇、麦芽糖醇、木糖醇、乙二醇、油酸、棕榈酸及其相似物质,可选择任意一种或几种协同作用。
所述的增强剂为明胶、琼脂、葡甘聚糖、羧甲基纤维素钠、海藻酸钠及其相似物质,可选择任意一种或几种协同作用。
所述的功能改性剂包括壳聚糖、类黄酮、皂苷、硬脂酸甘油单酯等具有抗菌、抗氧化、疏水、透明等作用的化合物。
本发明利用碱性氨基酸的双正极性氨基基团,使含电负性多羟基的糖链与氨基相互作用,在淀粉膜内起到分子交联作用,形成机械性能及其它物理性能和营养功能得到增强的淀粉膜。该淀粉膜可用于食品包装领域。
本发明各成分、参数构成一个整体。
本发明安全可食用、材料来源广泛、产品生产工艺简单、成本可控。
具体实施方式
以下实施例用于说明本发明,使其更明确,但决不用来限制本发明的范围。
实施例1
1)将5g玉米淀粉溶于100ml蒸馏水中,加入0.1g赖氨酸,稀释并混合均匀;
2)混合液加入2.0g海藻酸钠作为增强剂,1.5ml甘油作为增塑剂,1g棕榈酸作为乳化剂,80℃匀速搅拌40min至淀粉充分糊化成糊化液。糊化液经超声脱泡10min后,40℃条件下流延法成膜,脱水干燥,得到淀粉膜。
Claims (7)
1.一种以碱性氨基酸为双正极***联剂的可食性淀粉膜,该淀粉膜利用碱性氨基酸的双正极性氨基基团,使含电负性多羟基的淀粉的糖链与氨基相互作用,在淀粉膜内起到分子交联作用,形成机械性能及其它物理性能和营养功能得到增强的淀粉膜。
2.根据权利要求1所述的碱性氨基酸包括赖氨酸、精氨酸、组氨酸,可选择任意一种或几种协同作用。
3.根据权利要求1所述的含电负性多羟基的淀粉,包括但不限于玉米淀粉、马铃薯淀粉、魔芋粉、修饰淀粉及其它淀粉或其复合淀粉,且本发明不限于上述举例范围。
4.根据权利要求1所述的机械性能及其它物理性能,包括但不限于拉伸强度、亲水性、透明度等之一项或几项指标,且本发明不限于上述举例范围。
5.根据权利要求1所述的营养功能,其作用在于强化碱性氨基酸营养。
6.根据权利要求1所述的一种以碱性氨基酸为双正极***联剂的可食性淀粉膜,其特征在于以下步骤:
A、淀粉稀释液中加入质量分数为0.2~5%的碱性氨基酸作为双正极***联剂;
B、加入增塑剂、增强剂、功能改性剂,充分匀浆,加热糊化一定时间后形成的糊化液经超声脱气,涂布,脱水干燥成膜。
7.根据权利要求6B所述的增塑剂、增强剂、功能改性剂,包括但不限于甘露糖醇、麦芽糖醇、乙二醇、木糖醇、油酸、棕榈酸、明胶、琼脂、葡甘聚糖、羧甲基纤维素钠、海藻酸钠、壳聚糖、类黄酮、皂苷、单硬脂酸甘油酯、醇溶蛋白之一种或几种,且本发明不限于上述举例范围。
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