CN107712039A - 水果保鲜涂膜剂及其制备方法 - Google Patents
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Abstract
本发明提出了一种水果保鲜涂膜剂及其制备方法,按照重量百分数计算,包括以下组分:莼菜多糖1~5%、豆蔻酸0.1~1%、异抗坏血酸钠0.2~1.2%、氨基异丁酸0.1~0.5%、多聚赖氨酸0.1~0.4%及植物多糖胶0.06~0.36%,余量为水。制备方法:1)将植物多糖胶及水混合后放入水浴锅中加热至60~70℃,搅拌直至植物多糖胶完全溶解,然后加入莼菜多糖及豆蔻酸搅拌均匀直至完全溶解;冷却至室温后,再加入异抗坏血酸钠、氨基异丁酸与多聚赖氨酸混合搅拌至完全溶解,得到混合液;2)混合液过滤去除未溶解物质,真空条件下脱气,4℃~10℃静置过夜,再恢复至室温进行真空脱气,即可。该涂膜剂可以有效的降低水果的腐烂率、保持水果品质,提高水果的商品率,并延长保鲜期。
Description
技术领域
本发明属于水果保鲜技术领域,具体涉及一种水果保鲜涂膜剂及其制备方法。
背景技术
水果生产具有很强的季节性和地域性,为了满足消费者对水果的需求,有必要提升水果的保鲜技术,延长新鲜水果的上市周期。然而,新鲜的水果在采收后仍具有较高的生理活性,尤其是水分含量较高的水果更容易腐烂变质,因此延长储运保鲜时间成为新鲜水果保值增值的关键。
目前常用的水果保鲜技术主要有低温贮藏、气调保鲜、添加化学保鲜剂等手段。然而,这些技术在实际应用中均存在一定的局限性。冷链技术目前相对不成熟,在贮存、运输、销售过程中温度起伏变化更容易引起水果的腐烂变质,不利于长途运输;而气调保鲜需要气调箱或气体发生装置,对设备要求高,成本较高;化学保鲜剂会在果蔬表面形成残留,有潜在的食品安全问题。
中国专利申请CN200610084202.4公开了一种以纳米壳聚糖为主的荔枝、龙眼保鲜剂及制备方法,将壳聚糖制备成纳米形态后,大大提高了壳聚糖在水中的分散度,同时可充分利用其量子效应和巨大的表面和界面效应,使其具有更好的成膜性、吸湿性及保湿性。将本发明应用于荔枝、龙眼保鲜后,再辅以2-5℃温控,可保鲜40-50天,40天时经检测水份只减少4.8%,糖份增加2%,果壳颜色和果肉风味基本不变。涂膜保鲜技术近年来逐渐受到青睐。中国专利201310571047.9公开一种新鲜水果可食保鲜膜的制备方法,主要利用多糖、蛋白质、乳化剂、增塑剂等制备成膜进行保鲜。然而,单纯依靠成膜材料无法抑制微生物感染引起的水果腐烂,不能起到较好的保鲜效果。
发明内容
本发明提出一种水果保鲜涂膜剂,该涂膜剂可以有效的降低水果的腐烂率、保持水果品质,提高水果的商品率,并延长保鲜期。
本发明的技术方案是这样实现的:
一种水果保鲜涂膜剂,按照重量百分数计算,包括以下组分:
莼菜多糖1~5%、豆蔻酸0.1~1%、异抗坏血酸钠0.2~1.2%、氨基异丁酸0.1~0.5%、多聚赖氨酸0.1~0.4%及植物多糖胶0.06~0.36%,余量为水。
优选地,所述氨基异丁酸选自α-氨基异丁酸或β-氨基异丁酸。
优选地,所述植物多糖胶为海藻胶与黄原胶的混合物。
本发明的另一个目的是提供一种的水果保鲜涂膜剂的制备方法,包括以下步骤:
1)按照配比称取莼菜多糖、豆蔻酸、异抗坏血酸钠、氨基异丁酸、多聚赖氨酸、植物多糖胶及水,备用;
2)将植物多糖胶及水混合后放入水浴锅中加热至60~70℃,搅拌直至植物多糖胶完全溶解,然后加入莼菜多糖及豆蔻酸搅拌均匀直至完全溶解;冷却至室温后,再加入异抗坏血酸钠、氨基异丁酸与多聚赖氨酸混合搅拌至完全溶解,得到混合液;
3)将步骤2)的混合液过滤去除未溶解物质,真空条件下脱气,4℃~10℃静置过夜,再恢复至室温进行真空脱气,即可。
优选地,所述氨基异丁酸选自α-氨基异丁酸或β-氨基异丁酸。
优选地,所述植物多糖胶为海藻胶与黄原胶的混合物。
本发明的有益效果:
1、本发明的水果保鲜涂膜剂中的豆蔻酸与莼菜多糖可以有效地在果实表面形成薄膜,减少果实水分蒸腾,抑制果实采后的呼吸,减少果实营养消耗及变化;豆蔻酸与植物多糖胶协同作用,在水果表面形成肉眼不易发现的透明膜。
2、异抗坏血酸钠可以使得保鲜涂膜吸水性大大降低,降低由于冷藏过程中其他成分的吸水性对水果造成的冷害。
3、氨基异丁酸与多聚赖氨酸可以起到很好的杀菌与抗菌效果,特别是氨基异丁酸能够大大减少水果内源乙烯的释放,降低水果的腐烂率,延长水果保鲜期。
具体实施方式
实施例1
一种水果保鲜涂膜剂,按照重量百分数计算,包括以下组分:
莼菜多糖3%、豆蔻酸0.5%、异抗坏血酸钠0.6%、α-氨基异丁酸0.4%、多聚赖氨酸0.2%及植物多糖胶0.26%,余量为水。植物多糖胶为海藻胶与黄原胶的混合物。
制备方法:
1)按照配比称取莼菜多糖、豆蔻酸、α-异抗坏血酸钠、氨基异丁酸、多聚赖氨酸、植物多糖胶及水,备用;
2)将植物多糖胶及水混合后放入水浴锅中加热至70℃,搅拌直至植物多糖胶完全溶解,然后加入莼菜多糖及豆蔻酸搅拌均匀直至完全溶解;冷却至室温后,再加入异抗坏血酸钠、α-氨基异丁酸与多聚赖氨酸混合搅拌至完全溶解,得到混合液;
3)将步骤2)的混合液过滤去除未溶解物质,真空条件下脱气,4℃静置过夜,再恢复至室温进行真空脱气,即可。
实施例2
一种水果保鲜涂膜剂,按照重量百分数计算,包括以下组分:
莼菜多糖1%、豆蔻酸0.1%、异抗坏血酸钠0.2%、β-氨基异丁酸0.5%、多聚赖氨酸0.4%及植物多糖胶0.06%,余量为水。植物多糖胶为海藻胶与黄原胶的混合物。
制备方法:
1)按照配比称取莼菜多糖、豆蔻酸、异抗坏血酸钠、β-氨基异丁酸、多聚赖氨酸、植物多糖胶及水,备用;
2)将植物多糖胶及水混合后放入水浴锅中加热至65℃,搅拌直至植物多糖胶完全溶解,然后加入莼菜多糖及豆蔻酸搅拌均匀直至完全溶解;冷却至室温后,再加入异抗坏血酸钠、β-氨基异丁酸与多聚赖氨酸混合搅拌至完全溶解,得到混合液;
3)将步骤2)的混合液过滤去除未溶解物质,真空条件下脱气,8℃静置过夜,再恢复至室温进行真空脱气,即可。
实施例3
一种水果保鲜涂膜剂,按照重量百分数计算,包括以下组分:
莼菜多糖5%、豆蔻酸1%、异抗坏血酸钠1.2%、β-氨基异丁酸0.1%、多聚赖氨酸0.1%及植物多糖胶0.36%,余量为水。植物多糖胶为海藻胶与黄原胶的混合物。
制备方法:
1)按照配比称取莼菜多糖、豆蔻酸、异抗坏血酸钠、β-氨基异丁酸、多聚赖氨酸、植物多糖胶及水,备用;
2)将植物多糖胶及水混合后放入水浴锅中加热至60℃,搅拌直至植物多糖胶完全溶解,然后加入莼菜多糖及豆蔻酸搅拌均匀直至完全溶解;冷却至室温后,再加入异抗坏血酸钠、β-氨基异丁酸与多聚赖氨酸混合搅拌至完全溶解,得到混合液;
3)将步骤2)的混合液过滤去除未溶解物质,真空条件下脱气,8℃静置过夜,再恢复至室温进行真空脱气,即可。
试验例
取新鲜樱桃各1kg分为4组,洗净后分别放入实施例1-3的水果保鲜涂膜剂中于15℃下浸渍1min,取出放到温度为25℃、相对湿度为50%的恒温恒湿箱中风干60min,最后放到室温下保藏5天。对照组洗净后的新鲜樱桃直接放到温度为25℃、相对湿度为50%的恒温恒湿箱中风干60min,最后放到室温下保藏5天。最后对樱桃的失重率、烂果率、外观及口感进行考察评价,结果见表1。
表1 保鲜处理对水果的失重率、烂果率和感官评价的影响
失重率(%) | 烂果率(%) | 外观及口感 | |
实施例1 | 1.12 | 0 | 果实饱满,果肉香甜 |
实施例2 | 1.08 | 0.12 | 果实饱满,果肉香甜 |
实施例3 | 1.23 | 0.15 | 果实饱满,果肉香甜 |
对照组 | 14.25 | 25.13 | 表面变软、变色、部分发霉腐烂 |
以上所述仅为本发明的较佳实施例而已,并不用以限制本发明,凡在本发明的精神和原则之内,所作的任何修改、等同替换、改进等,均应包含在本发明的保护范围之内。
Claims (6)
1.一种水果保鲜涂膜剂,其特征在于,按照重量百分数计算,包括以下组分:
莼菜多糖1~5%、豆蔻酸0.1~1%、异抗坏血酸钠0.2~1.2%、氨基异丁酸0.1~0.5%、多聚赖氨酸0.1~0.4%及植物多糖胶0.06~0.36%,余量为水。
2.根据权利要求1所述的水果保鲜涂膜剂,其特征在于,所述氨基异丁酸选自α-氨基异丁酸或β-氨基异丁酸。
3.根据权利要求1所述的水果保鲜涂膜剂,其特征在于,所述植物多糖胶为海藻胶与黄原胶的混合物。
4.如权利要求1所述的水果保鲜涂膜剂的制备方法,其特征在于,包括以下步骤:
1)按照配比称取莼菜多糖、豆蔻酸、异抗坏血酸钠、氨基异丁酸、多聚赖氨酸、植物多糖胶及水,备用;
2)将植物多糖胶及水混合后放入水浴锅中加热至60~70℃,搅拌直至植物多糖胶完全溶解,然后加入莼菜多糖及豆蔻酸搅拌均匀直至完全溶解;冷却至室温后,再加入异抗坏血酸钠、氨基异丁酸与多聚赖氨酸混合搅拌至完全溶解,得到混合液;
3)将步骤2)的混合液过滤去除未溶解物质,真空条件下脱气,4℃~10℃静置过夜,再恢复至室温进行真空脱气,即可。
5.根据权利要求4所述的水果保鲜涂膜剂的制备方法,其特征在于,所述氨基异丁酸选自α-氨基异丁酸或β-氨基异丁酸。
6.根据权利要求4所述的水果保鲜涂膜剂的制备方法,其特征在于,所述植物多糖胶为海藻胶与黄原胶的混合物。
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