CN105837846A - 一种食品抗氧化包装膜的制备方法 - Google Patents
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Abstract
本发明提供了一种食品抗氧化包装膜的制备方法,先取硅酸钙、膨润土、氢化植物油、蔗糖、水、硅烷偶联剂混合,在70~90℃下改性反应,得到改性物;再取聚乙烯醇、二氧化钛、烯丙基磺酸钠、二羟甲基丙酸、过氧化二苯甲酰、微晶蜡、增塑剂,混合,经双螺杆挤出机熔融挤出,得到基材薄膜;然后取所得改性物、槲皮素、大豆卵磷脂、壳聚糖、微晶纤维素、分散剂、溶剂,混合,得到混悬液;最后将所得基材薄膜加热,将所得混悬液涂于基材薄膜上,升温至120~140℃,保持30~60 min,放冷,即可。本发明的食品抗氧化包装膜具有良好的拉伸性能、阻湿性能和阻氧性能,可广泛应用于食品领域。
Description
技术领域
本发明属于包装材料技术领域,具体涉及一种食品抗氧化包装膜的制备方法。
背景技术
油脂含量较高的食品在生产、运输、包装、贮藏、销售等过程中,极易受到外界环境的影响而发生腐败,最终造成食品品质和营养价值的下降,还有可能会有损害人体健康的潜在危险,变质后这些食品就会失去原有的品质而不被消费者接受。针对于含脂食品或富脂食品的易腐败变质现象,食品生产商也在不断改进生产工艺和生产技术,如在食品的制造过程中向食品原料中添加食品抗氧化剂、在食品表面涂覆喷洒或浸渍食品抗氧化剂、采用不同的包装形式或包装材料。但是,由于人们对有关食品安全和食品添加剂安全性关注的密切上升,使得这种食品生产形式或食品包装形式已经不能满足人们对于食品品质的要求。
目前,国外新兴研发了具有缓释功能的抗氧化包装材料,即在食品包装材料的生产过程中,将具有抗氧化能力的食品抗氧化剂分散在包装材料内,在一定时间或空间内包装材料内部的活性抗氧化剂可以以较缓慢的速度释放到包装内部,从而阻断食品的氧化过程,对食品的有效营养成分起到保护作用,延长食品氧化作用引起不利变化的时间,降低食品安全问题对人类健康的威胁,从而达到延长产品保质期、节省成本和减少浪费、保证食品品质的目的。所以开发具备缓释功能的食品包装材料,对于保证食品品质、保护消费者人身安全和消费利益以及防止食物浪费、缓解全球粮食危机等方面都有着非常重要的现实意义和深远作用。
发明内容
本发明的目的是克服现有技术的不足而提供一种食品抗氧化包装膜的制备方法,所得包装膜具有良好的拉伸性能、阻湿性能和阻氧性能。
一种食品抗氧化包装膜的制备方法,包括以下步骤:
步骤1,以重量份计,取硅酸钙5~10份、膨润土3~8份、氢化植物油2~7份、蔗糖5~10份、水70~90份、硅烷偶联剂5~10份混合,在70~90℃下改性反应,得到改性物;
步骤2,以重量份计,取聚乙烯醇60~80份、二氧化钛5~10份、烯丙基磺酸钠2~7份、二羟甲基丙酸4~6份、过氧化二苯甲酰2~4份、微晶蜡3~6份、增塑剂2~4份,混合,经双螺杆挤出机熔融挤出,得到基材薄膜;
步骤3,以重量份计,取步骤1所得改性物5~10份、槲皮素2~7份、大豆卵磷脂1~5份、壳聚糖2~6份、微晶纤维素3~5份、分散剂2~4份、溶剂20~40份,混合,得到混悬液;
步骤4,将步骤2所得基材薄膜加热至90~110℃,保持15~30 min,然后在该温度下,将步骤3所得混悬液涂于基材薄膜上,升温至120~140℃,保持30~60 min,放冷,即可。
进一步地,步骤1的改性反应在CO2气氛下进行。
进一步地,步骤2中双螺杆挤出机的螺杆温度为190~210℃、螺杆转速为140~160rpm。
进一步地,步骤2中增塑剂为矿物油。
进一步地,步骤3中溶剂为N,N-二甲基丙烯酰胺。
进一步地,步骤4中涂层厚度为2~4μm。
本发明的食品抗氧化包装膜具有良好的拉伸性能、阻湿性能和阻氧性能,可广泛应用于食品领域。
具体实施方式
实施例1
一种食品抗氧化包装膜的制备方法,包括以下步骤:
步骤1,以重量份计,取硅酸钙5份、膨润土3份、氢化植物油2份、蔗糖5份、水70份、硅烷偶联剂5份混合,在70℃下改性反应,得到改性物;
步骤2,以重量份计,取聚乙烯醇60份、二氧化钛5份、烯丙基磺酸钠2份、二羟甲基丙酸4份、过氧化二苯甲酰2份、微晶蜡3份、增塑剂2份,混合,经双螺杆挤出机熔融挤出,得到基材薄膜;
步骤3,以重量份计,取步骤1所得改性物5份、槲皮素2份、大豆卵磷脂1份、壳聚糖2份、微晶纤维素3份、分散剂2份、溶剂20份,混合,得到混悬液;
步骤4,将步骤2所得基材薄膜加热至90℃,保持30 min,然后在该温度下,将步骤3所得混悬液涂于基材薄膜上,升温至120℃,保持60 min,放冷,即可。
其中,步骤1的改性反应在CO2气氛下进行。步骤2中双螺杆挤出机的螺杆温度为190℃、螺杆转速为160rpm,增塑剂为矿物油。步骤3中溶剂为N,N-二甲基丙烯酰胺。步骤4中涂层厚度为2μm。
所得包装膜的拉伸强度为18MPa,透湿系数为13.22×10-15g·cm-1·s-1·Pa-1,透氧系数为12.57×10-15g·cm-1·s-1·Pa-1。
实施例2
一种食品抗氧化包装膜的制备方法,包括以下步骤:
步骤1,以重量份计,取硅酸钙6份、膨润土7份、氢化植物油5份、蔗糖8份、水75份、硅烷偶联剂9份混合,在80℃下改性反应,得到改性物;
步骤2,以重量份计,取聚乙烯醇65份、二氧化钛8份、烯丙基磺酸钠6份、二羟甲基丙酸5份、过氧化二苯甲酰3份、微晶蜡5份、增塑剂3份,混合,经双螺杆挤出机熔融挤出,得到基材薄膜;
步骤3,以重量份计,取步骤1所得改性物9份、槲皮素6份、大豆卵磷3份、壳聚糖5份、微晶纤维素4份、分散剂3份、溶剂25份,混合,得到混悬液;
步骤4,将步骤2所得基材薄膜加热至100℃,保持15min,然后在该温度下,将步骤3所得混悬液涂于基材薄膜上,升温至130℃,保持45 min,放冷,即可。
其中,步骤1的改性反应在CO2气氛下进行。步骤2中双螺杆挤出机的螺杆温度为200℃、螺杆转速为150rpm,增塑剂为矿物油。步骤3中溶剂为N,N-二甲基丙烯酰胺。步骤4中涂层厚度为3μm。
所得包装膜的拉伸强度为24MPa,透湿系数为12.78×10-15g·cm-1·s-1·Pa-1,透氧系数为13.14×10-15g·cm-1·s-1·Pa-1。
实施例3
一种食品抗氧化包装膜的制备方法,包括以下步骤:
步骤1,以重量份计,取硅酸钙8份、膨润土5份、氢化植物油3份、蔗糖6份、水80份、硅烷偶联剂8份混合,在75℃下改性反应,得到改性物;
步骤2,以重量份计,取聚乙烯醇65份、二氧化钛7份、烯丙基磺酸钠6份、二羟甲基丙酸5份、过氧化二苯甲酰3份、微晶蜡4份、增塑剂3份,混合,经双螺杆挤出机熔融挤出,得到基材薄膜;
步骤3,以重量份计,取步骤1所得改性物8份、槲皮素4份、大豆卵磷脂2份、壳聚糖3份、微晶纤维素4份、分散剂5份、溶剂35份,混合,得到混悬液;
步骤4,将步骤2所得基材薄膜加热至95℃,保持20min,然后在该温度下,将步骤3所得混悬液涂于基材薄膜上,升温至130℃,保持50 min,放冷,即可。
其中,步骤1的改性反应在CO2气氛下进行。步骤2中双螺杆挤出机的螺杆温度为200℃、螺杆转速为150rpm,增塑剂为矿物油。步骤3中溶剂为N,N-二甲基丙烯酰胺。步骤4中涂层厚度为3μm。
所得包装膜的拉伸强度为21MPa,透湿系数为14.15×10-15g·cm-1·s-1·Pa-1,透氧系数为12.15×10-15g·cm-1·s-1·Pa-1。
实施例4
一种食品抗氧化包装膜的制备方法,包括以下步骤:
步骤1,以重量份计,取硅酸钙10份、膨润土8份、氢化植物油7份、蔗糖10份、水90份、硅烷偶联剂10份混合,在90℃下改性反应,得到改性物;
步骤2,以重量份计,取聚乙烯醇80份、二氧化钛10份、烯丙基磺酸钠7份、二羟甲基丙酸6份、过氧化二苯甲酰4份、微晶蜡6份、增塑剂4份,混合,经双螺杆挤出机熔融挤出,得到基材薄膜;
步骤3,以重量份计,取步骤1所得改性物10份、槲皮素7份、大豆卵磷脂5份、壳聚糖6份、微晶纤维素5份、分散剂4份、溶剂40份,混合,得到混悬液;
步骤4,将步骤2所得基材薄膜加热至110℃,保持15min,然后在该温度下,将步骤3所得混悬液涂于基材薄膜上,升温至140℃,保持30 min,放冷,即可。
其中,步骤1的改性反应在CO2气氛下进行。步骤2中双螺杆挤出机的螺杆温度为210℃、螺杆转速为140rpm,增塑剂为矿物油。步骤3中溶剂为N,N-二甲基丙烯酰胺。步骤4中涂层厚度为4μm。
所得包装膜的拉伸强度为20MPa,透湿系数为11.22×10-15g·cm-1·s-1·Pa-1,透氧系数为10.97×10-15g·cm-1·s-1·Pa-1。
Claims (6)
1.一种食品抗氧化包装膜的制备方法,其特征在于:包括以下步骤:
步骤1,以重量份计,取硅酸钙5~10份、膨润土3~8份、氢化植物油2~7份、蔗糖5~10份、水70~90份、硅烷偶联剂5~10份混合,在70~90℃下改性反应,得到改性物;
步骤2,以重量份计,取聚乙烯醇60~80份、二氧化钛5~10份、烯丙基磺酸钠2~7份、二羟甲基丙酸4~6份、过氧化二苯甲酰2~4份、微晶蜡3~6份、增塑剂2~4份,混合,经双螺杆挤出机熔融挤出,得到基材薄膜;
步骤3,以重量份计,取步骤1所得改性物5~10份、槲皮素2~7份、大豆卵磷脂1~5份、壳聚糖2~6份、微晶纤维素3~5份、分散剂2~4份、溶剂20~40份,混合,得到混悬液;
步骤4,将步骤2所得基材薄膜加热至90~110℃,保持15~30 min,然后在该温度下,将步骤3所得混悬液涂于基材薄膜上,升温至120~140℃,保持30~60 min,放冷,即可。
2.根据权利要求1所述的食品抗氧化包装膜的制备方法,其特征在于:步骤1的改性反应在CO2气氛下进行。
3.根据权利要求1所述的食品抗氧化包装膜的制备方法,其特征在于:步骤2中双螺杆挤出机的螺杆温度为190~210℃、螺杆转速为140~160rpm。
4.根据权利要求1所述的食品抗氧化包装膜的制备方法,其特征在于:步骤2中增塑剂为矿物油。
5.根据权利要求1所述的食品抗氧化包装膜的制备方法,其特征在于:步骤3中溶剂为N,N-二甲基丙烯酰胺。
6.根据权利要求1所述的食品抗氧化包装膜的制备方法,其特征在于:步骤4中涂层厚度为2~4μm。
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