CN111019361A - 一种多分子层可食性生物膜的制备方法 - Google Patents
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Abstract
本发明公开了一种多分子层可食性生物膜的制备方法,特点是包括将高粱醇溶蛋白溶液和鱼明胶溶液分别过高压处理2次,并将高粱醇溶蛋白溶液分成2等份,并向其中一份高粱醇溶蛋白溶液中加入甘油;竹叶多酚溶于壳聚糖溶液中得到壳聚糖‑竹叶多酚溶液的步骤;通过反溶剂法将不含甘油的一份高粱醇溶蛋白溶液滴入壳聚糖‑竹叶多酚溶液得到载竹叶多酚微球溶液的步骤;将载竹叶多酚微球溶液经凝胶注入法注入到经高压处理的鱼明胶溶液中得到膜溶液的步骤;最后将膜溶液采用手提式注入法注入到含有甘油的高粱醇溶蛋白溶液中,通过溶剂蒸发法制备得到多分子层可食性生物膜,优点是具有较高的多酚包埋率、机械强度、抗拉伸强度和较低的溶解性。
Description
技术领域
本发明属于食品包装技术领域,尤其是涉及一种多分子层可食性生物膜制备方法。
背景技术
现代食品工业越来越关注食品的营养与健康,在食品加工、运输和贮藏过程中均会采取一些保护措施,来保护其中的营养成分如不饱和脂肪酸、多糖和生物活性物质等,从而提高产品的货架期和市场竞争力。近年来,食品塑料膜中存在的微量塑化剂迁移到食品中,以逐渐引起消费者的重视,并且食品塑料难以降解引发的“白色污染”也受到全球各国政府和人民的重视。因此,制备生物活性膜将其应用于食品中,从而替代塑料膜,成为食品包装材料的热点之一。
可用于可食性蛋白膜的基质主要有蛋白质、多糖、脂类等,其中蛋白质基质膜具有良好的阻气、提高食品感官和品质的特点而备受关注。但是,蛋白膜具有溶解度高、机械强度和热学稳定性差等缺点,并不能完全替代塑料膜而应用于食品包装中。虽然有关生物活性膜的报道很多,但大多仍然集中于单分子层或双分子层膜的研究,如CN108892810A公开报道了采用明胶、淀粉和壳聚糖等制备的一种全生物降解可食保鲜膜,但是该方法制备的膜生物存在高溶解度、低生物活性和机械强度差等的缺点。
发明内容
本发明所要解决的技术问题是提供一种具有较高的多酚包埋率、机械强度、抗拉伸强度和较低的溶解性的多分子层可食性生物膜的制备方法。
本发明解决上述技术问题所采用的技术方案为:一种多分子层可食性生物膜的制备方法,包括以下步骤:
(1)原料溶液的制备:将高粱醇溶蛋白溶于80%的乙醇中配制成质量浓度为0.2-0.6%的高粱醇溶蛋白溶液;将鱼明胶溶于蒸馏水中配制成质量浓度为0.2-0.4%的鱼明胶溶液;将壳聚糖溶于4wt%的醋酸溶液中配制成质量浓度为0.2-0.8%的壳聚糖溶液;
(2)动态高压微射流处理蛋白溶液:将高粱醇溶蛋白溶液和鱼明胶溶液分别过40-100Mpa的高压处理2次,并将高粱醇溶蛋白溶液分成2等份,并向其中一份高粱醇溶蛋白溶液中加入一定量的甘油使甘油质量浓度为5-20%;
(3)壳聚糖-竹叶多酚溶液的制备:称取适量的竹叶多酚溶于壳聚糖溶液中使竹叶多酚质量浓度为1-2%,得到壳聚糖-竹叶多酚溶液;
(4)载竹叶多酚微球溶液的制备:通过反溶剂法将步骤(2)得到的不含甘油的一份高粱醇溶蛋白溶液以10-50滴/分钟的速度滴入壳聚糖-竹叶多酚溶液,得到载竹叶多酚微球溶液;
(5)凝胶注入法制备成膜溶液:将载竹叶多酚微球溶液经凝胶注入法注入到步骤(2)处理得到的鱼明胶溶液中,得到膜溶液;
(6)溶剂蒸发法:将膜溶液采用手提式注入法注入到步骤(2)得到的另一份含有甘油的高粱醇溶蛋白溶液中,通过溶剂蒸发法制备得到多分子层可食性生物膜。
与现有技术相比,本发明的优点在于:
(1)采用动态高压微射流处理高粱醇溶蛋白和鱼明胶溶液。动态高压微射流可通过对流体进行高速剪切、高频振荡、空穴、瞬时高压等作用,显著改善蛋白质的大分子结构,发生去折叠、柔顺大分子。因此,有助于后期生物膜厚度的降低,保证了其良好的物化性能;
(2)以动态高压微射流处理的高粱醇溶蛋白和壳聚糖-竹叶多酚溶液为原料,通过反溶剂法制备高粱醇溶蛋白/壳聚糖/竹叶多酚粒子。高粱醇溶蛋白不溶于水,当其以一定的速度滴入壳聚糖-竹叶多酚溶液后,会迅速形成外包颗粒,包裹壳聚糖-竹叶多酚;
(3)选取竹叶多酚为生物活性物质,竹叶多酚不仅具有抑菌还有抗氧化的功效,此外,多酚也可以与蛋白质进行交联反应,有助于增强膜的机械强度;
(4)高粱醇溶蛋白是一种不溶于水而溶于50%~90%乙醇溶液的疏水性蛋白质,有良好的生物相容性和可降解性,可用于制备微颗粒或纳米颗粒,是一种理想的疏水性药物或功能活性成分的载体。不溶于水的高粱醇溶蛋白可以与壳聚糖通过反溶剂法形成纳米粒子,并且该粒子可包埋活性物质,具有较好的生物活性包埋率,是一种潜在的生物活性膜制备原料。
综上所述,本发明一种多分子层可食性生物膜的制备方法,以高粱醇溶蛋白、壳聚糖、竹叶多酚为原料,应用动态高压微射流、反溶剂法、凝胶注入法和溶剂蒸发法等技术,制备出一种多分子层可食性的生物膜,即保证了竹叶多酚的活性,赋予生物膜良好的抗菌、抗氧化效果,同时也有良好的机械性能、热学稳定性、遮光、阻隔气体和水蒸气等物理功效,可应用于食品包装中,本方法操作简单,可以应用于工业生产,且生产的生物膜功能性质好,可广泛使用于食品包装领域。
具体实施方式
以下结合实施例对本发明作进一步详细描述。
实施例1
一种多分子层可食性生物膜的制备方法,包括以下步骤:
(1)蛋白、多糖溶液的制备:称取适量的高粱醇溶蛋白溶于80%的乙醇中,配制成0.2%(w/v)的高粱醇溶蛋白溶液;称取适量的鱼明胶溶于蒸馏水中配制成0.2% (w/v)的鱼明胶溶液;称取适量的壳聚糖溶于4wt%的醋酸溶液中配制成0.2%(w/v)壳聚糖溶液;
(2)动态高压微射流处理蛋白溶液:将(1)中的高粱醇溶蛋白溶液和鱼明胶溶液分别过40Mpa的高压处理2次,并将高粱醇溶蛋白溶液分成2等份,并向其中一份高粱醇溶蛋白溶液中加入一定量的甘油,甘油浓度为5%(w/v);
(3)壳聚糖-竹叶多酚溶液的制备:称取适量的竹叶多酚溶于步骤(1)中的壳聚糖溶液中,多酚浓度为1%(w/v);
(4)载竹叶多酚微球溶液的制备:通过反溶剂法将步骤(2)中的一份高粱醇溶蛋白溶液以10滴/分钟的速度滴入步骤(3)中的溶液,制备载竹叶多酚微球;
(5) 凝胶注入法制备成膜溶液:将步骤(4)制备的载多酚微球溶液经凝胶注入法注入到(2)中的鱼明胶溶液中;
(6)溶剂蒸发法:将步骤(5)的溶液采用手提式注入法注入到(2)的另一份含有甘油的高粱醇溶蛋白溶液中,通过溶剂蒸发法,制备出多分子层可食性生物膜F1。本发明生产得到的生物膜,其竹叶多酚包埋率为89.2±1.23%,机械强度为6.78±0.41MPa, 抗拉伸强度为67.81±0.98%,溶解度为12.54±2.31%。
实施例2
一种多分子层可食性生物膜的制备方法,包括以下步骤:
(1)蛋白、多糖溶液的制备:称取适量的高粱醇溶蛋白溶于80%的乙醇中配制成0.4%(w/v)的高粱醇溶蛋白溶液;称取适量的鱼明胶溶于蒸馏水中配制成0.4%(w/v)的鱼明胶溶液;称取适量的壳聚糖溶于4wt%的醋酸溶液中配制成0.4%(w/v)壳聚糖溶液;
(2)动态高压微射流处理蛋白溶液:将(1)中的高粱醇溶蛋白溶液和鱼明胶溶液分别过80Mpa的高压处理2次,并将高粱醇溶蛋白溶液分成2等份,并向其中一份高粱醇溶蛋白溶液中加入一定量的甘油,甘油浓度为20%(w/v);
(3)壳聚糖-竹叶多酚溶液的制备:称取适量的竹叶多酚溶于步骤(1)中的壳聚糖溶液中,多酚浓度为2%(w/v);
(4)载竹叶多酚微球溶液的制备:通过反溶剂法将步骤(2)中的一份高粱醇溶蛋白溶液以20滴/分钟的速度滴入步骤(3)中的溶液,制备载竹叶多酚微球;
(5) 凝胶注入法制备成膜溶液:将步骤(4)制备的载多酚微球溶液经凝胶注入法注入到(2)中的鱼明胶溶液中;
(6)溶剂蒸发法:将步骤(5)的溶液采用手提式注入法注入到(2)的另一份含有甘油的高粱醇溶蛋白溶液中,通过溶剂蒸发法,制备出多分子层可食性生物膜F2。本发明生产得到的生物膜,其竹叶多酚包埋率为90.2±0.83%,机械强度为8.42±0.34MPa,抗拉伸强度为63.04±0.24%,溶解度为8.13±1.48%。
实施例3
一种多分子层可食性生物膜的制备方法,包括以下步骤:
(1)蛋白、多糖溶液的制备:称取适量的高粱醇溶蛋白溶于80%的乙醇中配制成0.6%(w/v)的高粱醇溶蛋白溶液;称取适量的鱼明胶溶于蒸馏水中配制成0.4%(w/v)的鱼明胶溶液;称取适量的壳聚糖溶于4wt%的醋酸溶液中配制成0.8%(w/v)壳聚糖溶液;
(2)动态高压微射流处理蛋白溶液:将(1)中的高粱醇溶蛋白溶液和鱼明胶溶液分别过100Mpa的高压处理2次,并将高粱醇溶蛋白溶液分成2等份,并向其中一份高粱醇溶蛋白溶液中加入一定量的甘油,甘油浓度为10%(w/v);
(3)壳聚糖-竹叶多酚溶液的制备:称取适量的竹叶多酚溶于步骤(1)中的壳聚糖溶液中,多酚浓度为2%(w/v);
(4)载竹叶多酚微球溶液的制备:通过反溶剂法将步骤(2)中的一份高粱醇溶蛋白溶液以50滴/分钟的速度滴入步骤(3)中的溶液,制备载竹叶多酚微球;
(5) 凝胶注入法制备成膜溶液:将步骤(4)制备的载多酚微球溶液经凝胶注入法注入到(2)中的鱼明胶溶液中;
(6)溶剂蒸发法:将步骤(5)的溶液采用手提式注入法注入到(2)的另一份含有甘油的高粱醇溶蛋白溶液中,通过溶剂蒸发法,制备出多分子层可食性生物膜F3。本发明生产得到的生物膜,其竹叶多酚包埋率为93.2±1.29%,机械强度为12.59±0.26MPa,抗拉伸强度为54.11±1.09%,溶解度为6.78±1.94%。
综上所述,本方法制备的生物膜具有较高的多酚包埋率、机械强度、抗拉伸强度和较低的溶解性,可以广泛应用于食品包装领域。本方法操作简单,实用性强,为制备可食性生物膜的制备提供了一种新的方法。
上述说明并非对本发明的限制,本发明也并不限于上述举例。本技术领域的普通技术人员在本发明的实质范围内,做出的变化、改型、添加或替换,也应属于本发明的保护范围。
Claims (1)
1.一种多分子层可食性生物膜的制备方法,其特征在于包括以下步骤:
(1)原料溶液的制备:将高粱醇溶蛋白溶于80%的乙醇中配制成质量浓度为0.2-0.6%的高粱醇溶蛋白溶液;将鱼明胶溶于蒸馏水中配制成质量浓度为0.2-0.4%的鱼明胶溶液;将壳聚糖溶于4wt%的醋酸溶液中配制成质量浓度为0.2-0.8%的壳聚糖溶液;
(2)动态高压微射流处理蛋白溶液:将高粱醇溶蛋白溶液和鱼明胶溶液分别过40-100Mpa的高压处理2次,并将高粱醇溶蛋白溶液分成2等份,并向其中一份高粱醇溶蛋白溶液中加入一定量的甘油使甘油质量浓度为5-20%;
(3)壳聚糖-竹叶多酚溶液的制备:称取适量的竹叶多酚溶于壳聚糖溶液中使竹叶多酚质量浓度为1-2%,得到壳聚糖-竹叶多酚溶液;
(4)载竹叶多酚微球溶液的制备:通过反溶剂法将步骤(2)得到的不含甘油的一份高粱醇溶蛋白溶液以10-50滴/分钟的速度滴入壳聚糖-竹叶多酚溶液,得到载竹叶多酚微球溶液;
(5)凝胶注入法制备成膜溶液:将载竹叶多酚微球溶液经凝胶注入法注入到步骤(2)处理得到的鱼明胶溶液中,得到膜溶液;
(6)溶剂蒸发法:将膜溶液采用手提式注入法注入到步骤(2)得到的另一份含有甘油的高粱醇溶蛋白溶液中,通过溶剂蒸发法制备得到多分子层可食性生物膜。
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