CN106720282A - 基于植物源提取剂的复合保鲜膜及其制备方法及应用 - Google Patents
基于植物源提取剂的复合保鲜膜及其制备方法及应用 Download PDFInfo
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Abstract
本发明公开了基于植物源提取剂的复合保鲜膜及其制备方法和应用,该保鲜膜是由植物叶片采用超声波提取的提取剂与海藻酸钠、柠檬酸、蔗糖酯复合溶液所组成,通过以下步骤制备所得:将采集的无花果叶片冲洗干净晾干80℃干燥至恒重,粉碎成粉末,过80目筛,于三角瓶中,按比例加入70%的乙醇,置于超声波细胞粉碎仪中;提取完成后吸取三角瓶上部提取液减压蒸馏,排除提取溶剂的影响,蒸馏后用高纯水进行定容;将1g/mL无花果叶提取液母液稀释至80mg/mL与1.5%海藻酸钠、500mg/L柠檬酸和0.5%蔗糖酯按1∶1∶1∶1比例混合,搅拌均匀,即得复合膜保鲜剂。本发明的保鲜膜为植物的、安全的、能抑制真菌生长的可食性的生物类保鲜膜。
Description
技术领域
本发明涉及保鲜技术,具体涉及一种基于植物源提取剂的复合保鲜膜及其制备方法及应用。
背景技术
随着新疆农业产业结构性调整,哈密瓜产业得以迅猛发展。但新疆地处我国西部,采后长距离运输造成的哈密瓜损耗是一个极大问题,加之夏季高温、高湿的环境,采后生理代谢旺盛,易遭受微生物病原菌侵染出现腐烂。据报道,新疆哈密瓜经长途运输及销售地短期贮藏会有5%-15%之间的损耗。在再销售过程中,经过批发、配送等中间环节又有3%-5%损耗,严重影响了哈密瓜产业的发展。近年来,针对甜瓜产业面临的问题,许多学者作了大量研究。但现阶段成果绝大部分还停留在传统的化学杀菌剂方面。众所周知,长期使用化学杀菌剂会造成环境污染、药物残留,进而危害消费者的身体健康。因此研究开发天然、高效、安全、无毒、性能稳定的广普性天然果蔬保鲜剂受到国内外的广泛重视,且逐渐成为科研热点之一。
发明内容
为解决上述问题,本发明提供了一种基于植物源提取剂的复合保鲜膜及其制备方法及应用,所得复合保鲜膜为植物的、安全的、能抑制真菌生长的可食性的生物类保鲜膜。该膜对哈密瓜的涂抹保鲜,可以减少腐烂和降低水分散失,保持良好品质的作用。
为实现上述目的,本发明采取的技术方案为:
一种基于植物源提取剂的复合保鲜膜,该保鲜膜是由植物叶片采用超声波提取的提取剂与海藻酸钠、柠檬酸、蔗糖酯复合溶液所组成。
基于植物源提取剂的复合保鲜膜的制备方法,包括如下步骤:
S1、无花果叶提取液的制备:
S11、将采集的无花果叶片用清水反复冲洗干净晾干,于80℃恒温干燥箱干燥至恒重,用万能粉碎机粉碎成粉末,过80目筛,得植物干粉;
S12、精确称取10.0g所得植物干粉于100mL的三角瓶中,以料液比1g∶10mL,加入质量分数为70%的乙醇,置于超声波细胞粉碎仪中,35℃提取30min;
S13、提取完成后吸取三角瓶上部提取液放入旋转蒸发仪进行减压蒸馏,排除提取溶剂70%乙醇的影响,蒸馏后用高纯水进行定容,得1g/mL母液于4℃冰箱保存备用;
S2、海藻酸钠的制备:称取一定量的成膜剂海藻酸钠,加入适量蒸馏水溶胀8h,搅拌溶解,得质量分数为1.5%海藻酸钠;
S3、柠檬酸的制备:称取一定量的柠檬酸,加入一定量的蒸馏水溶解,得浓度为500mg/L的柠檬酸溶液;
S4、蔗糖酯的制备:称取一定量的蔗糖酯,加入40℃左右的蒸馏水中溶解,得浓度为0.5%的蔗糖酯;
S5、复合保鲜膜的制备:将1g/mL无花果叶提取液母液稀释至80mg/mL与1.5%海藻酸钠、500mg/L柠檬酸和0.5%蔗糖酯按1∶1∶1∶1比例混合,搅拌均匀,即得复合膜保鲜剂。
上述植物源提取剂的复合保鲜膜制备方法所得的复合保鲜膜可用于哈密瓜保鲜。
本发明具有以下有益效果:
(1)无花果叶是一种天然植物叶片无化学污染、安全性高、资源丰富不破坏生态环境、抑菌性强;(2)海藻酸钠生产成本低,成模性好,减少水分散失、增加果品表皮亮度;(3)柠檬酸一种天然抗氧化剂,能起到清除活性氧、保护果实退色以及稳定果实中维生素C的作用;(4)蔗糖酯一种表面活性剂,它具有乳化、分散、增溶、保湿等多种性能。(5)将涂膜保鲜和生物保鲜有机的结合,具有上述所有的优点。该复合保鲜膜具有明显减少哈密瓜腐烂、减少水分散失、增加哈密瓜表皮的光泽度等多种功能,适用于哈密瓜的采后贮藏保鲜。
具体实施方式
为了使本发明的目的及优点更加清楚明白,以下结合实施例对本发明进行进一步详细说明。应当理解,此处所描述的具体实施例仅仅用以解释本发明,并不用于限定本发明。
本发明实施例提供了一种基于植物源提取剂的复合保鲜膜,该保鲜膜是由植物叶片采用超声波提取的提取剂与海藻酸钠、柠檬酸、蔗糖酯复合溶液所组成。
基于植物源提取剂的复合保鲜膜的制备方法,包括如下步骤:
S1、无花果叶提取液的制备:
S11、将采集的无花果叶片用清水反复冲洗干净晾干,于80℃恒温干燥箱干燥至恒重,用万能粉碎机粉碎成粉末,过80目筛,得植物干粉;
S12、精确称取10.0g所得植物干粉于100mL的三角瓶中,以料液比1g∶10mL,加入质量分数为70%的乙醇,置于超声波细胞粉碎仪中,35℃提取30min;
S13、提取完成后吸取三角瓶上部提取液放入旋转蒸发仪进行减压蒸馏,排除提取溶剂70%乙醇的影响,蒸馏后用高纯水进行定容,得1g/mL母液于4℃冰箱保存备用;
S2、海藻酸钠的制备:称取一定量的成膜剂海藻酸钠,加入适量蒸馏水溶胀8h,搅拌溶解,得质量分数为1.5%海藻酸钠;
S3、柠檬酸的制备:称取一定量的柠檬酸,加入一定量的蒸馏水溶解,得浓度为500mg/L的柠檬酸溶液;
S4、蔗糖酯的制备:称取一定量的蔗糖酯,加入40℃左右的蒸馏水中溶解,得浓度为0.5%的蔗糖酯;
S5、复合保鲜膜的制备:将1g/mL无花果叶提取液母液稀释至80mg/mL与1.5%海藻酸钠、500mg/L柠檬酸和0.5%蔗糖酯按1∶1∶1∶1比例混合,搅拌均匀,即得复合膜保鲜剂。
实验例
无花果叶提取剂的提取方法和优化:采用超声波细胞粉碎仪进行提取,通过正交实验对提取液浓度、料液比、提取时间、提取温度进行优化,得出适合无花果叶的提取方法为70%乙醇,料液比1g∶10mL,35℃,放入超声波细胞粉碎仪中进行提取30min为宜。
无花果叶提取剂的抑菌试验:对哈密瓜贮藏期的真菌病害进行分离、纯化和鉴定。最终得出哈密瓜贮藏期的真菌菌株分别是:镰刀菌属、链格孢属和青霉属。采用琼脂块抑菌圈法对3种菌株进行无花果叶提取剂的抑菌试验,试验结果得出抑制率分别高达77.78%、84.29%和75.46%。
不同浓度无花果叶提取剂的单一制剂对哈密瓜贮藏保鲜的影响:将无花果叶提取剂稀释成不同浓度喷涂在哈密瓜表面,以蒸馏水作为对照,常温贮藏观察腐烂情况,结果表明:不同浓度的提取液处理的腐烂率明显低于对照处理的腐烂率,提取液处理能延长哈密瓜的腐烂4-6d。无花果提取液母液处理的腐烂较其他处理浓度腐烂严重。说明合适的处理浓度有利于减少哈密瓜的腐烂。
不同浓度无花果叶提取剂复合保鲜膜对哈密瓜贮藏保鲜的影响:选取海藻酸钠为被膜剂,柠檬酸为抗氧化剂,并添加蔗糖酯作为助剂,无花果叶提取剂作为杀菌剂,组成无花果叶提取剂复合膜。每种成分设置3个浓度,采用L9(34)即3水平4因素的正交表安排实验。以腐烂率和失重率作为考察指标,进行极差及方差分析,确定哈密瓜无花果叶提取液复合膜保鲜剂的最佳组成配方,即80mg/mL无花果提取液,1.5%海藻酸钠,500mg/L柠檬酸,0.5%蔗糖酯。
以上所述仅是本发明的优选实施方式,应当指出,对于本技术领域的普通技术人员来说,在不脱离本发明原理的前提下,还可以作出若干改进和润饰,这些改进和润饰也应视为本发明的保护范围。
Claims (3)
1.一种基于植物源提取剂的复合保鲜膜,其特征在于,该保鲜膜是由植物叶片采用超声波提取的提取剂与海藻酸钠、柠檬酸、蔗糖酯复合溶液所组成。
2.如权利要求1所述基于植物源提取剂的复合保鲜膜的制备方法,其特征在于,包括如下步骤:
S1、无花果叶提取液的制备:
S11、将采集的无花果叶片用清水反复冲洗干净晾干,于80℃恒温干燥箱干燥至恒重,用万能粉碎机粉碎成粉末,过80目筛,得植物干粉;
S12、精确称取10.0g所得植物干粉于100mL的三角瓶中,以料液比1g∶10mL,加入质量分数为70%的乙醇,置于超声波细胞粉碎仪中,35℃提取30min;
S13、提取完成后吸取三角瓶上部提取液放入旋转蒸发仪进行减压蒸馏,排除提取溶剂70%乙醇的影响,蒸馏后用高纯水进行定容,得1g/mL母液于4℃冰箱保存备用;
S2、海藻酸钠的制备:称取一定量的成膜剂海藻酸钠,加入适量蒸馏水溶胀8h,搅拌溶解,得质量分数为1.5%海藻酸钠;
S3、柠檬酸的制备:称取一定量的柠檬酸,加入一定量的蒸馏水溶解,得浓度为500mg/L的柠檬酸溶液;
S4、蔗糖酯的制备:称取一定量的蔗糖酯,加入40℃左右的蒸馏水中溶解,得浓度为0.5%的蔗糖酯;
S5、复合保鲜膜的制备:将1g/mL无花果叶提取液母液稀释至80mg/mL与1.5%海藻酸钠、500mg/L柠檬酸和0.5%蔗糖酯按1∶1∶1∶1比例混合,搅拌均匀,即得复合膜保鲜剂。
3.如权利要求2所述的基于植物源提取剂的复合保鲜膜制备方法所得的复合保鲜膜的应用,其特征在于,可用于哈密瓜保鲜。
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