CN107266721A - 一种抗氧化食品包装膜及其制备方法 - Google Patents

一种抗氧化食品包装膜及其制备方法 Download PDF

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CN107266721A
CN107266721A CN201710557653.3A CN201710557653A CN107266721A CN 107266721 A CN107266721 A CN 107266721A CN 201710557653 A CN201710557653 A CN 201710557653A CN 107266721 A CN107266721 A CN 107266721A
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Abstract

本发明公开了一种抗氧化食品包装膜以及其制备方法,其抗氧化食品包装膜由羧甲基纤维素、壳聚糖、抗菌剂、抗氧化剂、增塑剂、蒸馏水、醋酸溶液、植物精油加工而成。本发明的制备方法是将羧甲基纤维素溶液与壳聚糖乙酸溶液混合后,再加入抗菌剂和抗氧化剂混合液,经加热搅拌后,加入增塑剂,脱气后过滤得成膜液,最后将膜液冷却干燥后浸涂植物精油得抗氧化食品包装膜。本发明采用天然抗菌、抗氧化成分,能有效延长食品的保质期,同时本发明制备的食品包装膜原料便宜易,生物降解性好。经本发明制备的食品包装膜适用于豆奶,饮料、麦片、奶粉、鸡爪、豆腐干等食品的包装。

Description

一种抗氧化食品包装膜及其制备方法
技术领域
本发明涉及食品包装膜领域,尤其是涉及一种抗氧化食品包装膜及其制备方法。
背景技术
近年来,食品质量和品质安全随着科技的日益发展愈发受到社会的广泛关注。食品包装膜作为保障食品安全,延长食品的货架期重要的材料,其性质以及功能也备受关注。
目前,传统的塑料包装膜(聚乙烯,聚丙烯等)应用较普遍,但是这些材料存在一些缺点,如在包装食品之后,容易产生有害气体和异味,有的塑料包装对人体还有一定的毒性作用。并且塑料包装膜性质稳定,使用后遗弃在环境中不易分解腐烂,长期存留,引起环境污染等。可见,开发生物可降解性的食品包装膜满足广发消费者的需求具有重要的作用。
壳聚糖是由自然界广泛存在的几丁质,是甲壳素脱 N-乙酰基的产物, 具其来源广泛、安全可靠、成膜性能优良,且有较强的抗菌性能,在食品包装领域有着广阔的发展前景。但是没有抗氧化性,且抑菌谱较窄的弱点限制了其在食品活性包装中的应用范围,因此,开发一种抗氧化性强的壳聚糖食品包装膜对拓宽壳聚糖在食品包装膜种的应用具有重要的作用。
发明内容
本发明提供一种抗氧化食品包装膜及其制备方法。
本发明提供的一种抗氧化食品包装膜的制备方法,其特征在于,具体步骤为:
(1)将2-6g羧甲基纤维素用适量乙醇润湿,然后加入适量蒸馏水,于25-70℃下搅拌均匀备用;
(2)称取4-6g壳聚糖,加入到1.0-2.0%(v/v)乙酸溶液中,在60℃的恒温条件下搅拌80min,使其充分溶解,制得2.0-4.0%(w/v)的壳聚糖乙酸溶液备用;
(3)将0.1-0.4g抗菌剂以及0.5-0.8g抗氧化剂溶解在10-40 mL的0.5-3%醋酸溶液中,于20-35℃下搅拌均匀得到抗菌剂和抗氧化剂混合液;
(4)将配制好的壳聚糖乙酸溶液和羧甲基纤维素溶液按一定比例混合均匀后加入10-40 mL配制好的抗菌剂和抗氧化剂混合液后,于50-75℃加热搅拌20-45分钟后,加入0.5-2.5g增塑剂,边搅拌边加水溶解,彻底溶解后于50-70℃ 下搅拌 15-30分钟,以真空脱泡机进行脱气0.5-2小时,充分混合均匀,最后过滤得成膜液。
(5)在玻璃板上流延后静置, 使膜液冷却至室温成膜,干燥后浸涂0.5-3%植物精油,于40-50 ℃ 烘干3-5小时,室温下冷却即得抗氧化食品包装膜。
进一步的,步骤(1)中所述的羧甲基纤维素的浓度应控制在1.5-3.0g/ml。
进一步的,步骤(3)中所述的抗菌剂为黄连提取物、苦参提取物、连翘提取物、大黄提取物、生地提取物中的一种或两种。,
进一步的,步骤(3)中所述的抗氧化剂为芦荟多酚提取物,绿茶多酚提取物以及木瓜多酚提取物中的一种或多种。
进一步的,于步骤(4)中所述的增塑剂为甘油、山梨醇、PEG-400中的一种或多种。
进一步的,步骤(4)中所述的壳聚糖乙酸溶液和羧甲基纤维素溶液体积比1:2-4。
进一步的,步骤(5)中所述的植物精油为萄籽油,迷迭香精油,茴香精油,柠檬精油中的一种或多种。
本发明的抗氧化食品包装膜,由上述的制备方法所制备。
本发明以天然壳聚糖以及羧甲基纤维素作为塑料的主要成分,得到的食品包装膜生物降解性好,更为环保。壳聚糖以及羧甲基纤维素来源广泛,价格低廉。同时,本发明制备的食品包装膜制使用天然抗菌,抗氧化成分,能有效延长所包装的食品的保质期。同时,在膜中加添天然植物精油,增加了产品天然的芳香。此外,经本发明制备的食品包装膜适用于豆奶,饮料、麦片、奶粉、鸡爪、豆腐干等食品的包装。
具体实施方式
下面将结合具体实施例对本发明作进一步详细说明,但本发明的实施方式不限于此。
实施例1
(1)将2.5g羧甲基纤维素用适量乙醇润湿,然后加入适量蒸馏水,于40℃下搅拌均匀备用;
(2)称取4.5g壳聚糖,加入到2.0%(v/v)乙酸溶液中,在60℃的恒温条件下搅拌80min,使其充分溶解,制得3.0%(w/v)的壳聚糖乙酸溶液备用;
(3)将0.3g苦参提取物以及0.7g芦荟多酚提取物溶解在30 mL的1.8%醋酸溶液中,于35℃下搅拌均匀得到抗菌剂和抗氧化剂混合液;
(4)将配制好的壳聚糖乙酸溶液和羧甲基纤维素溶液按1:3的体积比混合均匀后加入30 mL配制好的抗菌剂和抗氧化剂混合液后,于65℃加热搅拌25分钟后,加入1.5g甘油,边搅拌边加水溶解,彻底溶解后于70℃下搅拌 15分钟,以真空脱泡机进行脱气1小时,充分混合均匀,最后过滤得成膜液;
(5)在玻璃板上流延后静置, 使膜液冷却至室温成膜,干燥后浸涂3%柠檬精油,于40℃ 烘干5小时,室温下冷却即得抗氧化食品包装膜。
实施例2
(1)将4g羧甲基纤维素用适量乙醇润湿,然后加入适量蒸馏水,于50℃下搅拌均匀备用;
(2)称取一定量的壳聚糖,加入到1.5%(v/v)乙酸溶液中,在60℃的恒温条件下搅拌80min,使其充分溶解,制得3.0%(w/v)的壳聚糖乙酸溶液备用;
(3)将0.4g连翘提取物以及0.8g绿茶多酚提取物溶解在40 mL的1.5%醋酸溶液中,于45℃下搅拌均匀得到抗菌剂和抗氧化剂混合液;
(4)将配制好的壳聚糖乙酸溶液和羧甲基纤维素溶液按1:2的体积比例混合均匀后加入40 mL配制好的抗菌剂和抗氧化剂混合液后,于55℃加热搅拌30分钟后,加入2.5g甘油,边搅拌边加水溶解,彻底溶解后于65℃下搅拌 20分钟,以真空脱泡机进行脱气1.5小时,充分混合均匀,最后过滤得成膜液;
(5)在玻璃板上流延后静置, 使膜液冷却至室温成膜,干燥后浸涂3%茴香精油,于45℃ 烘干5小时,室温下冷却即得抗氧化食品包装膜。
实施例3
(1)将2.6g羧甲基纤维素用适量乙醇润湿,然后加入适量蒸馏水,于50℃下搅拌均匀备用;
(2)称取5.5g壳聚糖,加入到2.0%(v/v)乙酸溶液中,在60℃的恒温条件下搅拌80min,使其充分溶解,制得3.5%(w/v)的壳聚糖乙酸溶液备用;
(3)将0.3g大黄提取物以及0.8g木瓜多酚提取物溶解在30 mL的1.8%醋酸溶液中,于35℃下搅拌均匀得到抗菌剂和抗氧化剂混合液;
(4)将配制好的壳聚糖乙酸溶液和羧甲基纤维素溶液按1:4比例混合均匀后加入30 mL配制好的抗菌剂和抗氧化剂混合液后,于65℃加热搅拌40分钟后,加入2.0gPEG400,边搅拌边加水溶解,彻底溶解后于70℃下搅拌 25分钟,以真空脱泡机进行脱气1.5小时,充分混合均匀,最后过滤得成膜液;
(5)在玻璃板上流延后静置, 使膜液冷却至室温成膜,干燥后浸涂2.5%迷迭香精油,于40 ℃ 烘干5小时,室温下冷却即得抗氧化食品包装膜。
以上所述仅为本发明的较佳实例,凡依本发明申请专利范围所做的均等变化与修饰,皆应属本发明的涵盖范围。

Claims (8)

1.一种抗氧化食品包装膜的制备方法,其特征在于,具体步骤为:
(1)将2-6g羧甲基纤维素用适量乙醇润湿,然后加入适量蒸馏水,于25-70℃下搅拌均匀备用;
(2)称4-6g取壳聚糖,加入到1.0-2.0%(v/v)乙酸溶液中,在60℃的恒温条件下搅拌80min,使其充分溶解,制得2.0-4.0%(w/v)的壳聚糖乙酸溶液备用;
(3)将0.1-0.4g抗菌剂以及0.5-0.8g抗氧化剂溶解在10-40 mL的0.5-3%醋酸溶液中,于20-35℃下搅拌均匀得到抗菌剂和抗氧化剂混合液;
(4)将配制好的壳聚糖乙酸溶液和羧甲基纤维素溶液按一定比例混合均匀后加入10-40 mL配制好的抗菌剂和抗氧化剂混合液后,于50-75℃加热搅拌20-45分钟后,加入0.5-2.5g增塑剂,边搅拌边加水溶解,彻底溶解后于50-70℃ 下搅拌 15-30分钟,以真空脱泡机进行脱气0.5-2小时,充分混合均匀,最后过滤得成膜液;
(5)在玻璃板上流延后静置, 使膜液冷却至室温成膜,干燥后浸涂0.5-3%植物精油,于40-50 ℃ 烘干3-5小时,室温下冷却即得抗氧化食品包装膜。
2.根据权利要求7所述一种抗氧化食品包装膜的制备方法,其特征在于步骤(1)中所述的羧甲基纤维素的浓度应控制在1.5-3.0g/ml。
3.根据权利要求1所述的抗氧化食品包装膜的制备方法,其特征在于步骤(3)中所述的抗菌剂为黄连提取物、苦参提取物、连翘提取物、大黄提取物、生地提取物中的一种或两种。
4.根据权利要求1所述的抗氧化食品包装膜的制备方法,其特征在于步骤(3)中所述的抗氧化剂为芦荟多酚提取物,绿茶多酚提取物以及木瓜多酚提取物中的一种或多种。
5.根据权利要求1所述的抗氧化食品包装膜的制备方法,其特征在于步骤(4)中所述的增塑剂为甘油、山梨醇、PEG-400中的一种或多种。
6.根据权利要求4所述抗氧化食品包装膜的制备方法,其特征在于步骤(4)中所述的壳聚糖乙酸溶液和羧甲基纤维素溶液体积比1:2-4。
7.根据权利要求1所述的抗氧化食品包装膜的制备方法,其特征在于步骤(5)中所述的植物精油为萄籽油,迷迭香精油,茴香精油,柠檬精油中的一种或多种。
8.一种抗氧化食品包装膜,其特征在于,由上述权利要求1至7中任意一项的制备方法所制备。
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Application publication date: 20171020