CN107936311B - 一种基于三赞胶交联改性的可食用膜及其制备方法和应用 - Google Patents
一种基于三赞胶交联改性的可食用膜及其制备方法和应用 Download PDFInfo
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Abstract
本发明公开一种基于三赞胶交联改性的可食用膜,其组成成分及重量份数如下:三赞胶0.2‑2份,淀粉0‑2.5份,海藻酸钠0‑2份,交联剂0.05‑1份,增塑剂0‑2份。本发明可食用膜是利用三赞胶为主要成膜材料,与淀粉、海藻酸钠共混,经交联剂的交联,配以甘油、山梨醇等增塑剂,经灌注、干燥后形成的一种可食用膜,该可食用膜具有优良的机械性能和低水蒸气透过率等特性,由于膜材组分具有安全性和生物可降解性,用其作为食品的外包装可起到延缓产品变质和延长货架期的作用。
Description
技术领域
本发明属于食品技术领域,尤其是一种基于三赞胶交联改性的可食用膜及其制备方法和应用。
背景技术
可食用膜是利用多糖、蛋白质、脂肪等可以食用的材料,制成的一种可以食用、能保鲜食品并具有包装保护功能的薄膜。通过包裹、涂布、微胶囊等形式覆盖于食品表面(或内部),可以阻隔水汽、其它气体或各种溶质的渗透,并起到保护作用,保证食品的质量,延长食品货架期。多糖类可食用膜是多糖类大分子物质溶于溶剂中,通过分子内和分子间作用力形成的具有网状结构的薄膜。三赞胶是一种新型微生物代谢胶,具有良好的增稠性、假塑性、胶凝和乳化性能,可酸沉提取,与其他多糖类产品相比具有明显的价格优势。
目前广泛应用的食品包装材料大多是化工产品,造成了包装食品的不安全性,同时无法降解,增加环境污染,因此,近年来可食用膜在食品包装上的应用不断增加,例如,糖果包装上使用的糯米纸,但由于其机械性能较差,影响了进一步应用;而其他多糖类可食用膜由于多糖本身的提取成本过高,造成了膜的成本高,也无法得到广泛应用与推广。
通过检索,尚未发现与本发明相关的专利公开文献。
发明内容
本发明的目的在于克服原有技术的不足之处,提供一种基于三赞胶交联改性的可食用膜及其制备方法和应用,该可食用膜具有优良的机械性能和低水蒸气透过率等特性,由于膜材组分具有安全性和生物可降解性,用其作为食品的外包装可起到延缓产品变质和延长货架期的作用。
本发明解决技术问题所采用的技术方案是:
一种基于三赞胶交联改性的可食用膜,其组成成分及重量份数如下:
三赞胶0.2-2份,淀粉0-2.5份,海藻酸钠0-2份,交联剂0.05-1份,增塑剂0-2份。
而且,所述淀粉为红薯淀粉、玉米淀粉、绿豆淀粉或变性淀粉中的一种或两种的混合物。
而且,所述交联剂为氯化钙、柠檬酸钠或三偏磷酸钠中的一种或两种的混合物。
而且,所述增塑剂为甘油、聚乙二醇、丙二醇、山梨醇中的一种或两种的混合物。
一种如上所述的基于三赞胶交联改性的可食用膜的制备方法,步骤如下:
⑴溶解:称取三赞胶,加入水,50℃条件下磁力搅拌12h以上,使三赞胶充分溶解,得三赞胶溶液;称取海藻酸钠,加入水,磁力搅拌使其充分溶解,得海藻酸钠溶液;称取淀粉,加水煮沸溶解,得淀粉溶液;
⑵交联:将交联剂加入三赞胶溶液中,25-75℃条件下振荡混匀,交联pH为7.5-8,交联时间0.5-3h,得交联改性的三赞胶溶液;
⑶共混:将交联改性的三赞胶溶液与海澡酸钠溶液、现溶解的淀粉溶液混匀后,加入增塑剂,形成三赞胶成膜液;
⑷铺膜:将上述三赞胶成膜液振摇混匀0.5-1h,超声除去气泡,取三赞胶成膜液在PVC板上流延成膜,40-60℃条件下烘干,揭膜,即得基于三赞胶交联改性的可食用膜。
如上所述的基于三赞胶交联改性的可食用膜在食品生产中的应用。
本发明取得的优点和积极效果是:
1、本发明可食用膜是利用三赞胶为主要成膜材料,与淀粉、海藻酸钠共混,经交联剂的交联,配以甘油、山梨醇等增塑剂,经灌注、干燥后形成的一种可食用膜,该可食用膜具有优良的机械性能和低水蒸气透过率等特性,由于膜材组分具有安全性和生物可降解性,用其作为食品的外包装可起到延缓产品变质和延长货架期的作用。
2、本发明可食用膜应用于食品生产中,可以使食品包装膜安全、可食、可降解,增加了食品外包装的安全性,降低了环境污染,同时降低了多糖类可食用膜的制膜成本,基于三赞胶交联改性的可食用膜具有良好透光性和阻水性,抗拉强度和断裂延伸率等机械性能好,对于猪肉等的保鲜具有理想的效果。
3、本发明可食用膜中用于改性的交联剂为氯化钙、柠檬酸钠、三偏磷酸钠中的一种或两种的混合物,增塑剂为甘油、聚乙二醇、丙二醇、山梨醇的一种或两种的混合物,经过交联改性和热处理后,膜液形成不可逆凝胶网络结构;另外,三赞胶是一种新型微生物多糖,关于其在可食用膜方面的应用尚属空白。
附图说明
图1为本发明中交联剂三偏磷酸钠对三赞胶溶液流变性能的影响图;
图2为本发明中交联改性的三赞胶膜表面扫描电镜图(A为空白的三赞胶膜表面,B为三偏磷酸钠交联后的三赞胶膜表面);
图3为本发明中覆膜后猪肉冷藏过程中的挥发性盐基氮变化图;
图4为本发明中覆膜后猪肉冷藏过程中的细菌菌落总数变化。
具体实施方式
为能进一步了解本发明的内容、特点及功效,兹例举以下实施例,并配合附图详细说明如下。需要说明的是,本实施例是描述性的,不是限定性的,不能由此限定本发明的保护范围。
实施例1
一种基于三赞胶交联改性的可食用膜,其组成成分及重量份数如下:
三赞胶1份,淀粉0份,海藻酸钠1份,交联剂0.1份,增塑剂0.7份。
上述基于三赞胶交联改性的可食用膜的制备方法如下:
将三赞胶按1%的质量体积百分比加入水中,50℃条件下磁力搅拌12h;加入交联剂三偏磷酸钠后可提高三赞胶溶液的流变学性能(如图1所示),加入0.1%三偏磷酸钠溶液,然后于25℃、pH7.5条件下交联1h;交联改性的三赞胶溶液加入等量溶胀12h的1%海藻酸钠溶液和0.7%的甘油,振摇混匀0.5h,得到三赞胶成膜液;将三赞胶成膜液超声除去气泡后,取一定量的膜液在PVC板上流延成膜,55℃条件下烘干,揭膜,即得基于三赞胶交联改性的可食用膜,其性能如表1所示,膜的扫描电镜结构示意如图2所示。
上述百分数均为质量体积百分比,溶剂均为水。
实施例2
一种基于三赞胶交联改性的可食用膜,其组成成分及重量份数如下:
三赞胶1份,淀粉0.5份,海藻酸钠0.5份,交联剂0.1份,增塑剂0.9份。
上述基于三赞胶交联改性的可食用膜的制备方法如下:
将三赞胶按1%的质量体积百分比加入水中,50℃条件下磁力搅拌12h;加入0.1%三偏磷酸钠50℃、pH7.5条件下交联1h;交联改性的三赞胶溶液加入等量溶胀12h的0.5%海藻酸钠溶液和现溶解的0.5%红薯淀粉溶液,以及0.9%的山梨醇,振摇混匀0.5h,得到三赞胶成膜液;将三赞胶成膜液超声除去气泡后,取一定量的膜液在PVC板上流延成膜,55℃条件下烘干,揭膜,即得基于三赞胶交联改性的可食用膜,其性能如表1所示。
上述百分数均为质量体积百分比,溶剂均为水。
实施例3
一种基于三赞胶交联改性的可食用膜,其组成成分及重量份数如下:
三赞胶0.5份,淀粉0份,海藻酸钠0.5份,交联剂0.05份,增塑剂0.3份。
上述基于三赞胶交联改性的可食用膜的制备方法如下:
将三赞胶按0.5%的质量体积百分比加入水中,50℃条件下磁力搅拌12h;加入0.05%氯化钙70℃、pH7.5条件下交联3h;交联改性的三赞胶溶液加入等量溶胀12h的0.5%海藻酸钠溶液和0.3%的甘油,振摇混匀0.5h,得到三赞胶成膜液;将三赞胶成膜液超声除去气泡后,取一定量的膜液在PVC板上流延成膜,55℃条件下烘干,揭膜,即得基于三赞胶交联改性的可食用膜,其性能如表1所示。
上述百分数均为质量体积百分比,溶剂均为水。
实施例4
一种基于三赞胶交联改性的可食用膜,其组成成分及重量份数如下:
三赞胶0.5份,淀粉0份,海藻酸钠0.5份,交联剂0.05份,增塑剂0.3份。
上述基于三赞胶交联改性的可食用膜的制备方法如下:
将三赞胶按0.5%的质量体积百分比加入水中,50℃条件下磁力搅拌12h;加入0.05%柠檬酸钠65℃、pH8.0条件下交联2h;交联改性的三赞胶溶液加入等量溶胀12h的0.5%海藻酸钠溶液和0.3%的甘油,振摇混匀0.5h,得到三赞胶成膜液;将三赞胶成膜液超声除去气泡后,取一定量的膜液在PVC板上流延成膜,55℃条件下烘干,揭膜,即得基于三赞胶交联改性的可食用膜,其性能如表1所示。将20g切块猪肉放入烧杯中,用该膜封口,4℃贮藏,与没有覆膜的对照相比,其挥发性盐基氮和细菌菌落总数分别降低了17.5%和91.9%,结果如图3、图4所示。
上述百分数均为质量体积百分比,溶剂均为水。
实施例5
一种基于三赞胶交联改性的可食用膜,其组成成分及重量份数如下:
三赞胶0.5份,淀粉1份,海藻酸钠0.5份,交联剂0.05份,增塑剂0.9份。
上述基于三赞胶交联改性的可食用膜的制备方法如下:
将三赞胶按0.5%的质量体积百分比加入水中,50℃条件下磁力搅拌12h;加入0.05%三偏磷酸钠75℃、pH8.0条件下交联2h;交联改性的三赞胶溶液加入等量溶胀12h的0.5%海藻酸钠溶液和现溶解的1%变性淀粉溶液,以及0.9%的甘油,振摇混匀0.5h,得到三赞胶成膜液;将三赞胶成膜液超声除去气泡后,取一定量的膜液在PVC板上流延成膜,55℃条件下烘干,揭膜,即得基于三赞胶交联改性的可食用膜,其性能如表1所示。将20g切块猪肉放入烧杯中,用该膜封口,4℃贮藏,与没有覆膜的对照相比,其挥发性盐基氮和细菌菌落总数分别降低了7.9%和89.6%,结果如图3、图4所示。
上述百分数均为质量体积百分比,溶剂均为水。
表1膜特性及机械性能表
Claims (2)
1.一种基于三赞胶交联改性的可食用膜,其特征在于:其组成成分及重量份数如下:
三赞胶0.2-2份,淀粉0-2.5份,海藻酸钠0-2份,交联剂0.05-1份,增塑剂0-2份;
所述的基于三赞胶交联改性的可食用膜的制备方法,步骤如下:
⑴溶解:称取三赞胶,加入水,50℃条件下磁力搅拌12h以上,使三赞胶充分溶解,得三赞胶溶液;称取海藻酸钠,加入水,磁力搅拌使其充分溶解,得海藻酸钠溶液;称取淀粉,加水煮沸溶解,得淀粉溶液;
⑵交联:将交联剂加入三赞胶溶液中,25-75℃条件下振荡混匀,交联pH为7.5-8,交联时间0.5-3h,得交联改性的三赞胶溶液;
⑶共混:将交联改性的三赞胶溶液与海澡酸钠溶液、现溶解的淀粉溶液混匀后,加入增塑剂,形成三赞胶成膜液;
⑷铺膜:将上述三赞胶成膜液振摇混匀0.5-1h,超声除去气泡,取三赞胶成膜液在PVC板上流延成膜,40-60℃条件下烘干,揭膜,即得基于三赞胶交联改性的可食用膜;
所述淀粉为红薯淀粉、玉米淀粉、绿豆淀粉或变性淀粉中的一种或两种的混合物;
所述交联剂为氯化钙、柠檬酸钠或三偏磷酸钠中的一种或两种的混合物;
所述增塑剂为甘油、聚乙二醇、丙二醇、山梨醇中的一种或两种的混合物。
2.如权利要求1所述的基于三赞胶交联改性的可食用膜在食品生产中的应用。
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