CN113603939B - 一种淀粉基可降解包装材料 - Google Patents
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Abstract
本发明提供了一种淀粉基可降解包装材料,属于包装材料技术领域。本发明提供的淀粉基包装材料为一种淀粉基保鲜膜,该保鲜膜能够有效的抑制革兰氏阴性菌和革兰氏阳性菌,并且可以有效的清除DPPH自由基,从而有效的抗氧化,因此,使用本发明提供的保鲜膜包装食物时,可以有效的抑制细菌和抗氧化,从而延长食物的保存时间。
Description
技术领域
本发明属于包装材料技术领域,尤其涉及一种淀粉基可降解包装材料。
背景技术
目前,在使用传统的包装材料进行食品的包装时,由于包装材料不具有抗菌性能,其无法有效的抑制食品表面的细菌生长,因此在长期储存时,食物容易发生腐烂。其次,传统包装材料多为塑料材质,使用后无法被有效的降解,容易对自然环境和生态平衡产生严重危害。
随着人们对环保意识的提高,天然可降解的食品包装逐渐成为研究的热点,以淀粉为基材的包装材料由于来源广泛,价格便宜,因此具有广阔的应用前景。但是,使用淀粉制备的可降解包装材料的抗菌性能较差,因此需要在其中添加抗菌材料。目前,常见的食品抗菌剂多为化学合成,长期使用时会对人体产生一定的损害,因此需要寻找新的天然抗菌物质。
发明内容
本发明的目的在于提供一种抑菌并且抗氧化的淀粉基可降解包装材料。
为实现上述目的,本发明提供了如下技术方案:
本发明提供了一种淀粉基可降解保鲜膜,按质量百分比计,所述保鲜膜包括如下制备原料:玉米淀粉 5%,马银花多糖 0.5-1.5%,甘油 0.5%,羟甲基纤维素钠 0.5%,其余为水。
优选地,所述包装材料的制备方法包括如下步骤:
(1)制备5%的玉米淀粉悬液,70℃搅拌糊化30min;
(2)加入0.5%甘油和0.5%羟甲基纤维素钠搅拌20min;
(3)冷却至40℃加入0.5%-1.5%的马银花多糖,搅拌均匀,得到保鲜液;
(4)将保鲜液加入到模具中,干燥,得到保鲜膜。
优选地,所述马银花多糖的制备方法包括如下步骤:
(1)将马银花洗净,放入烘干机中烘干,使用95%乙醇浸泡12h;
(2)取出放入烘干机中烘干,使用粉碎机粉碎为粉末;
(3)按照1:20的料液比加水,搅拌均匀后,500W超声功率,超声提取2h,得到马银花浸提液;
(4)将马银花浸提液放入离心机中,离心去除沉淀,将得到的上清液减压浓缩至原体积的1/5,得到马银花粗多糖提取液;
(5)加入1/4体积的Sevage试剂,充分振荡后,离心后收集上层清液,重复3次将蛋白完全去除,得到马银花粗多糖滤液;
(6)在滤液中加入95%的乙醇至乙醇量达到80%,得到马银花粗多糖沉淀,使用无水乙醇洗涤沉淀得到马银花粗多糖;
(7)将得到的马银花粗多糖加水配置为10mg/ml的溶液,使用100KD的超滤膜进行过滤,收集过滤液,浓缩后,冷冻干燥得到马银花多糖。
其次,本发明提供了马银花多糖在制备抑菌淀粉基可降解保鲜膜中的应用,所述马银花多糖的制备方法包括如下步骤:
(1)将马银花洗净,放入烘干机中烘干,使用95%乙醇浸泡12h;
(2)取出放入烘干机中烘干,使用粉碎机粉碎为粉末;
(3)按照1:20的料液比加水,搅拌均匀后,500W超声功率,超声提取2h,得到马银花浸提液;
(4)将马银花浸提液放入离心机中,离心去除沉淀,将得到的上清液减压浓缩至原体积的1/5,得到马银花粗多糖提取液;
(5)加入1/4体积的Sevage试剂,充分振荡后,离心后收集上层清液,重复3次将蛋白完全去除,得到马银花粗多糖滤液;
(6)在滤液中加入95%的乙醇至乙醇量达到80%,得到马银花粗多糖沉淀,使用无水乙醇洗涤沉淀得到马银花粗多糖;
(7)将得到的马银花粗多糖加水配置为10mg/ml的溶液,使用100KD的超滤膜进行过滤,收集过滤液,浓缩后,冷冻干燥得到马银花多糖。
优选地,所述抑菌包括抑制革兰氏阴性菌和革兰氏阳性菌。
优选地,所述革兰氏阴性菌为大肠杆菌,所述革兰氏阳性菌为金黄色葡萄球菌。
优选地,所述保鲜膜的制备步骤如下:
(1)制备5%的玉米淀粉悬液,70℃搅拌糊化30min;
(2)加入0.5%甘油和0.5%羟甲基纤维素钠搅拌20min;
(3)冷却至40℃加入0.5%-1.5%的马银花多糖,搅拌均匀,得到保鲜液;
(4)将保鲜液加入到模具中,干燥,得到保鲜膜。
除此之外,本发明提供了马银花多糖在制备抗氧化淀粉基可降解保鲜膜中的应用,其特征在于,所述马银花多糖的制备方法包括如下步骤:
(1)将马银花洗净,放入烘干机中烘干,使用95%乙醇浸泡12h;
(2)取出放入烘干机中烘干,使用粉碎机粉碎为粉末;
(3)按照1:20的料液比加水,搅拌均匀后,500W超声功率,超声提取2h,得到马银花浸提液;
(4)将马银花浸提液放入离心机中,离心去除沉淀,将得到的上清液减压浓缩至原体积的1/5,得到马银花粗多糖提取液;
(5)加入1/4体积的Sevage试剂,充分振荡后,离心后收集上层清液,重复3次将蛋白完全去除,得到马银花粗多糖滤液;
(6)在滤液中加入95%的乙醇至乙醇量达到80%,得到马银花粗多糖沉淀,使用无水乙醇洗涤沉淀得到马银花粗多糖;
(7)将得到的马银花粗多糖加水配置为10mg/ml的溶液,使用100KD的超滤膜进行过滤,收集过滤液,浓缩后,冷冻干燥得到马银花多糖。
优选地,所述应用包括马银花多糖在制备可清除DPPH自由基的淀粉基可降解保鲜膜中的应用。
优选地,所述保鲜膜的制备步骤如下:
(1)制备5%的玉米淀粉悬液,70℃搅拌糊化30min;
(2)加入0.5%甘油和0.5%羟甲基纤维素钠搅拌20min;
(3)冷却至40℃加入0.5%-1.5%的马银花多糖,搅拌均匀,得到保鲜液;
(4)将保鲜液加入到模具中,干燥,得到保鲜膜。
本发明的有益效果是:
本发明提供了一种添加有马银花多糖的淀粉基可降解保鲜膜,本发明所提供的保鲜膜能够有效的抑制革兰氏阴性菌和革兰氏阳性菌,并且可以有效的清楚DPPH自由基,从而具有杀菌和抗氧化的功能。
附图说明
图1 保鲜膜A-D对于大肠杆菌的抑制效果;
图2 保鲜膜A-D对于金黄色葡萄球菌的抑制效果;
图3 保鲜膜A-D对于DPPH自由基的清除效果。
具体实施方式
为能清楚说明本方案的技术特点,下面通过具体实施方式,对本方案进行阐述。
实施例1
(1)将马银花洗净,放入烘干机中烘干,使用95%乙醇浸泡12h;
(2)取出放入烘干机中烘干,使用粉碎机粉碎为粉末;
(3)在50g粉末中加入1000ml,搅拌均匀后,500W超声功率,超声提取2h,得到马银花浸提液;
(4)将马银花浸提液放入离心机中,离心去除沉淀,将得到的上清液减压浓缩至200ml,得到马银花粗多糖提取液;
(5)加入50ml的Sevage试剂,充分振荡后,离心后收集上层清液,重复3次将蛋白完全去除,得到马银花粗多糖滤液;
(6)在滤液中加入95%的乙醇至乙醇量达到80%,得到马银花粗多糖沉淀,使用无水乙醇洗涤沉淀得到马银花粗多糖;
(7)将得到的马银花粗多糖加水配置为10mg/ml的溶液,使用100KD的超滤膜进行过滤,收集过滤液,浓缩后,冷冻干燥得到马银花多糖。
实施例2
(1)将5g玉米淀粉加入到100ml水中,70℃搅拌糊化30min;
(2)加入0.5g甘油和0.5g羟甲基纤维素钠搅拌20min,搅拌均匀,得到保鲜液;
(3)将保鲜液加入到模具中,干燥,得到保鲜膜A。
实施例3
(1)将5g的玉米淀粉加入到100ml水中,70℃搅拌糊化30min;
(2)加入0.5g甘油和0.5g羟甲基纤维素钠搅拌20min;
(3)冷却至40℃加入0.5g的马银花多糖,搅拌均匀,得到保鲜液;
(4)将保鲜液加入到模具中,干燥,得到保鲜膜B。
实施例4
(1)将5g的玉米淀粉加入到100ml水中,70℃搅拌糊化30min;
(2)加入0.5g甘油和0.5g羟甲基纤维素钠搅拌20min;
(3)冷却至40℃加入1g的马银花多糖,搅拌均匀,得到保鲜液;
(4)将保鲜液加入到模具中,干燥,得到保鲜膜C。
实施例5
(1)将5g的玉米淀粉加入到100ml水中,70℃搅拌糊化30min;
(2)加入0.5g甘油和0.5g羟甲基纤维素钠搅拌20min;
(3)冷却至40℃加入1.5g的马银花多糖,搅拌均匀,得到保鲜液;
(4)将保鲜液加入到模具中,干燥,得到保鲜膜D。
实施例6
(1)将活化的大肠杆菌或金黄色葡萄球菌使用无菌生理盐水稀释,配置成106CFU/ml的菌液;
(2)将配置好的牛肉膏蛋白胨培养基经121℃高压蒸汽灭菌后,冷却至50℃时,将30ml培养基倒入90mm无菌平板,凝固后备用;
(3)将50ul的菌液均匀的涂布于无菌平板上;
(3)使用打孔器将保鲜膜A-D打出直径8mm的圆盘膜,使用紫外灯照射30min进行杀菌;
(4)将膜使用无菌夹子夹取至培养基上,每组中设置有3个重复;
(5)将平板置于培养箱中,继续培养16h,培养结束后,测定抑菌圈直径。
表1 保鲜膜的抑菌效果检测
细菌类型 | 保鲜膜A | 保鲜膜B | 保鲜膜C | 保鲜膜D |
大肠杆菌(mm) | 0 | 10.67±0.94 | 14.18±0.71 | 16.09±0.58 |
金黄色葡萄球菌(mm) | 0 | 12.19±0.78 | 16.76±0.78 | 19.73±0.73 |
从表1中可以看出,单纯使用玉米淀粉所制备的保鲜膜无抗菌效果,而使用马银花多糖所制备的保鲜膜可以有效的抑制革兰氏阴性菌大肠杆菌,并且可以有效的抑制革兰氏阳性菌金黄色葡萄球菌,其中,对于金黄色葡萄球菌的抑制效果更优异。
实施例7
(1)使用无水乙醇配置2×10-4DPPH溶液,棕色瓶中低温保存备用;
(2)使用打孔器将保鲜膜A-D打出直径8mm的圆盘膜;
(3)将保鲜膜A-D加入到DPPH溶液中(每组设置3个重复,对照组不添加保鲜膜),室温下,避光搅拌30min;
(4)DPPH自由基清除率=A0-A1/A0×100%;
表2保鲜膜的DPPH自由基清除效果
从上述结果可以看出,单纯使用玉米淀粉制备的保鲜膜具有较弱的抗氧化能力,而添加马银花多糖的保鲜膜则可以显著的降低DPPH自由基,说明马银花多糖所制备的保鲜膜可以有效的清除DPPH自由基,因此具有抗氧化的效果。
Claims (2)
1.一种淀粉基可降解保鲜膜,其特征在于,按质量百分比计,所述保鲜膜包括如下制备原料:玉米淀粉 5%,马银花多糖 0.5-1.5%,甘油 0.5%,羟甲基纤维素钠 0.5%,其余为水;
所述保鲜膜的制备方法包括如下步骤:
(1)制备5%的玉米淀粉悬液,70℃搅拌糊化30min;
(2)加入0.5%甘油和0.5%羟甲基纤维素钠搅拌20min;
(3)冷却至40℃加入0.5%-1.5%的马银花多糖,搅拌均匀,得到保鲜液;
(4)将保鲜液加入到模具中,干燥,得到保鲜膜;
所述马银花多糖的制备方法包括如下步骤:
(1)将马银花洗净,放入烘干机中烘干,使用95%乙醇浸泡12h;
(2)取出放入烘干机中烘干,使用粉碎机粉碎为粉末;
(3)按照1:20的料液比加水,搅拌均匀后,500W超声功率,超声提取2h,得到马银花浸提液;
(4)将马银花浸提液放入离心机中,离心去除沉淀,将得到的上清液减压浓缩至原体积的1/5,得到马银花粗多糖提取液;
(5)加入1/4体积的Sevage试剂,充分振荡后,离心后收集上层清液,重复3次将蛋白完全去除,得到马银花粗多糖滤液;
(6)在滤液中加入95%的乙醇至乙醇量达到80%,得到马银花粗多糖沉淀,使用无水乙醇洗涤沉淀得到马银花粗多糖;
(7)将得到的马银花粗多糖加水配置为10mg/ml的溶液,使用100KD的超滤膜进行过滤,收集过滤液,浓缩后,冷冻干燥得到马银花多糖。
2.马银花多糖在制备同时具有抑菌和抗氧化功能的淀粉基可降解保鲜膜中的应用,其特征在于,所述马银花多糖的制备方法包括如下步骤:
(1)将马银花洗净,放入烘干机中烘干,使用95%乙醇浸泡12h;
(2)取出放入烘干机中烘干,使用粉碎机粉碎为粉末;
(3)按照1:20的料液比加水,搅拌均匀后,500W超声功率,超声提取2h,得到马银花浸提液;
(4)将马银花浸提液放入离心机中,离心去除沉淀,将得到的上清液减压浓缩至原体积的1/5,得到马银花粗多糖提取液;
(5)加入1/4体积的Sevage试剂,充分振荡后,离心后收集上层清液,重复3次将蛋白完全去除,得到马银花粗多糖滤液;
(6)在滤液中加入95%的乙醇至乙醇量达到80%,得到马银花粗多糖沉淀,使用无水乙醇洗涤沉淀得到马银花粗多糖;
(7)将得到的马银花粗多糖加水配置为10mg/ml的溶液,使用100KD的超滤膜进行过滤,收集过滤液,浓缩后,冷冻干燥得到马银花多糖;
所述抑菌的菌株包括抑制革兰氏阴性菌和革兰氏阳性菌;
所述革兰氏阴性菌为大肠杆菌,所述革兰氏阳性菌为金黄色葡萄球菌;
所述抗氧化功能为清除DPPH自由基;
所述保鲜膜的制备步骤如下:
(1)制备5%的玉米淀粉悬液,70℃搅拌糊化30min;
(2)加入0.5%甘油和0.5%羟甲基纤维素钠搅拌20min;
(3)冷却至40℃加入0.5%-1.5%的马银花多糖,搅拌均匀,得到保鲜液;
(4)将保鲜液加入到模具中,干燥,得到保鲜膜。
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