CN116641262A - 一种高抗水防油的食品包装纸制备工艺 - Google Patents
一种高抗水防油的食品包装纸制备工艺 Download PDFInfo
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- CN116641262A CN116641262A CN202310377256.3A CN202310377256A CN116641262A CN 116641262 A CN116641262 A CN 116641262A CN 202310377256 A CN202310377256 A CN 202310377256A CN 116641262 A CN116641262 A CN 116641262A
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- high water
- carbon nano
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- ZQPPMHVWECSIRJ-KTKRTIGZSA-N oleic acid Chemical compound CCCCCCCC\C=C/CCCCCCCC(O)=O ZQPPMHVWECSIRJ-KTKRTIGZSA-N 0.000 claims description 8
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- D21H23/02—Processes or apparatus for adding material to the pulp or to the paper characterised by the manner in which substances are added
- D21H23/22—Addition to the formed paper
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Abstract
本发明公开了一种高抗水防油的食品包装纸制备工艺,包括以下步骤:将5‑10份壳聚糖水溶液、1‑3份十二烷基三甲基溴化铵加入到15‑20份质量分数2%的盐酸溶液中搅拌均匀,然后加入2‑4份羟乙基纤维素、0.25‑0.45份硫酸镧,继续搅拌充分,得到壳聚糖复调液;加入木浆纤维总量2‑5%的壳聚糖复调液,一级搅拌反应,得到混浆料。本发明通过碳纳米管复配改性累托石剂中的碳纳米管排布在基体表面,承载针状硅灰石结构,形成有序的点位结构,与浸渍胶液二者协配,抗水防油性能进一步的得到改进,从而制备的产品具有优异的抗水防油性,以及产品的强度性能优异,二者可起到显著的协调式改进效率。
Description
技术领域
本发明涉及食品包装纸技术领域,具体涉及一种高抗水防油的食品包装纸制备工艺。
背景技术
食品包装纸在日常生活中必不可少,其应用范围比较广,包括卡纸、牛皮纸、液体包装纸、纸杯纸、格拉辛纸、羊皮纸、玻璃纸、防油纸、烘焙纸等多个品种。生活中的大部分食物都会含有油类物质,所以通常食品包装纸需要具有防油性能,比如西式快餐食品包装纸、中式快餐食品包装纸、中西式糕点包装纸、肉类间隔纸、烘焙纸和烧烤纸、蛋糕杯纸等。防油类食品包装纸含塑含氟,不绿色环保,不可降解的塑料对环境有着不可预见的影响;含氟化合物在人体长期积累,可以引起人类身体健康疾病;
现有食品包装纸的防油防水汽阻隔性能差以及纸张强度性能不够好,很难做到防油防水汽阻隔性、纸张强度协调改进,限制了产品的使用效率。
发明内容
针对现有技术的缺陷,本发明的目的是提供一种高抗水防油的食品包装纸制备工艺,以解决上述背景技术中提出的问题。
本发明解决技术问题采用如下技术方案:
本发明提供了一种高抗水防油的食品包装纸制备工艺,包括以下步骤:
步骤一:将5-10份壳聚糖水溶液、1-3份十二烷基三甲基溴化铵加入到15-20份质量分数2%的盐酸溶液中搅拌均匀,然后加入2-4份羟乙基纤维素、0.25-0.45份硫酸镧,继续搅拌充分,得到壳聚糖复调液;
步骤二:木浆纤维、竹纤维按照重量比1.5:(2-3)混合,通过打浆机进行打浆,打浆度控制在30-35°SR,然后加入木浆纤维总量2-5%的壳聚糖复调液,一级搅拌反应,得到混浆料;
步骤三:然后再加入混浆料总量4-8%的碳纳米管复配改性累托石剂、混浆料总量1-2%的瓜豆胶,二级搅拌反应,搅拌结束,得到待用浆;
步骤四:随后再将待用浆进行抄纸、烘干制得基体纸;
步骤五:将基体纸送入到等离子体箱内辐照处理,辐照结束,得到辐照型改性纸体;
步骤六:最后再将辐照型改性纸体置于浸渍胶液中浸渍改性处理,改性结束,得到本发明的高抗水防油的食品包装纸。
优选地,所述壳聚糖水溶液的质量分数为5-8%。
优选地,所述一级搅拌反应的转速为350-450r/min,搅拌时间为20-30min;所述二级搅拌反应的转速为750-850r/min,搅拌时间为5-10min。
优选地,所述碳纳米管复配改性累托石剂的制备方法为:
S01:将累托石按照重量比1:5加入到浓硫酸中,于350-450W的超声下超声处理5-10min,然后水洗、干燥;
S02:S01产物再于150-160℃下热处理10-20min,然后以1-3℃/s的速率冷却至45℃,保温,最后再于3-5倍的海藻酸钠水溶液中分散均匀,再水洗、干燥,即可得到预改性的累托石剂;
S03:将碳纳米管按照重量比1:(5-7)送入到调节改性液中,于500-600r/min的转速下搅拌30-40min,搅拌温度为40-45℃,得到碳纳米管改性复配液;
S04:向S02的预改性的累托石剂中加入预改性的累托石剂总量10-20%的碳纳米管改性复配液,然后球磨处理,球磨转速为1450-1550r/min,球磨时间为1-2h,球磨结束、水洗、干燥,得到碳纳米管复配改性累托石剂。
优选地,所述碳纳米管为多壁碳纳米管;所述多壁碳纳米管直径为55-65nm,长度为20-50μm;所述海藻酸钠水溶液的质量分数为10-15%。
优选地,所述调节改性液包括以下重量份原料:
4-8份针状硅灰石、25-30份去离子水、硝酸铈水溶液1-3份、0.25-0.45份柠檬酸和0.5-1.0份顺丁烯二酸二仲辛酯磺酸钠。
优选地,所述针状硅灰石的长径比为(26-28):1;所述硝酸铈水溶液的质量分数为0.5-1%。
优选地,所述浸渍胶液的制备方法为:
S11:将20-30份丙烯酸乳液、2-5份聚乙烯蜡乳液加入到45-55份乙醇溶剂中,搅拌均匀,得到胶液基体;
S12:将1-3份油酸、0.45-0.55份N-2-氨乙基-3-氨丙基三甲氧基硅烷加入到胶液基体中,随后再加入2-5份氨基硅油、1-3份二乙烯基苯,搅拌充分,得到浸渍胶液。
优选地,所述聚乙烯蜡乳液为软化点100℃以上的聚乙烯蜡,固体含量为30-35%,粒径50-80nm。
优选地,所述等离子体箱内辐照处理的辐照功率为300-350W,辐照时间为20-30min;所述浸渍改性处理的浸渍压力为12-14MPa,浸渍时间为25-30min。
与现有技术相比,本发明具有如下的有益效果:
本发明食品包装纸采用木浆纤维、竹纤维打浆处理,通过壳聚糖复调液进行一级搅拌复调优化,壳聚糖复调液中的壳聚糖水溶液配合盐酸溶液,提高浆液的活性度和容透度,通过羟乙基纤维素、硫酸镧和十二烷基三甲基溴化铵进一步的协配,能够配合碳纳米管复配改性累托石剂在二级搅拌中,更好的将碳纳米管复配改性累托石剂分布在浆液中,碳纳米管复配改性累托石剂通过累托石经过浓硫酸超声分散,提高其活性界面能,而经过150-160℃下热处理10-20min,然后以1-3℃/s的速率冷却至45℃,保温,最后再于3-5倍的海藻酸钠水溶液,提高其片层层间距,以及提高其分散度;累托石是二八面体云母和二八面体蒙皂石组成的1:1规则间层矿物,能够增强产品基体的强度性能,碳纳米管具有高比表面积结构,在经过调节改性液配合后形成碳纳米管改性复配液,通过针状硅灰石协配,利用碳纳米管排布在基体表面,通过承载针状硅灰石结构,形成有序的点位结构,油污、水很难在其表面停留,提高抗水、抗油污性能,同时通过硝酸铈水溶液、柠檬酸和顺丁烯二酸二仲辛酯磺酸钠协调,碳纳米管复配改性累托石剂能够更好的分布在浆液中,从而提高产品优化效果,进而优化改进产品的强度、抗水防油性能,二者可协调改进;
浸渍胶液采用丙烯酸乳液、聚乙烯蜡乳液配合油酸、N-2-氨乙基-3-氨丙基三甲氧基硅烷优化改性,通过氨基硅油、二乙烯基苯协配,优化的浸渍胶液分布在基体表面,提高产品的抗水防油效率,通过碳纳米管复配改性累托石剂中的碳纳米管排布在基体表面,承载针状硅灰石结构,形成有序的点位结构,与浸渍胶液二者协配,抗水防油性能进一步的得到改进,从而制备的产品具有优异的抗水防油性,以及产品的强度性能优异,二者可起到显著的协调式改进效率。
具体实施方式
下面结合具体实施例,对本发明实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例仅仅是本发明一部分实施例,而不是全部的实施例。基于本发明中的实施例,本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例,都属于本发明保护的范围。
本实施例的一种高抗水防油的食品包装纸制备工艺,包括以下步骤:
步骤一:将5-10份壳聚糖水溶液、1-3份十二烷基三甲基溴化铵加入到15-20份质量分数2%的盐酸溶液中搅拌均匀,然后加入2-4份羟乙基纤维素、0.25-0.45份硫酸镧,继续搅拌充分,得到壳聚糖复调液;
步骤二:木浆纤维、竹纤维按照重量比1.5:(2-3)混合,通过打浆机进行打浆,打浆度控制在30-35°SR,然后加入木浆纤维总量2-5%的壳聚糖复调液,一级搅拌反应,得到混浆料;
步骤三:然后再加入混浆料总量4-8%的碳纳米管复配改性累托石剂、混浆料总量1-2%的瓜豆胶,二级搅拌反应,搅拌结束,得到待用浆;
步骤四:随后再将待用浆进行抄纸、烘干制得基体纸;
步骤五:将基体纸送入到等离子体箱内辐照处理,辐照结束,得到辐照型改性纸体;
步骤六:最后再将辐照型改性纸体置于浸渍胶液中浸渍改性处理,改性结束,得到本发明的高抗水防油的食品包装纸。
本实施例的壳聚糖水溶液的质量分数为5-8%。
本实施例的一级搅拌反应的转速为350-450r/min,搅拌时间为20-30min;所述二级搅拌反应的转速为750-850r/min,搅拌时间为5-10min。
本实施例的碳纳米管复配改性累托石剂的制备方法为:
S01:将累托石按照重量比1:5加入到浓硫酸中,于350-450W的超声下超声处理5-10min,然后水洗、干燥;
S02:S01产物再于150-160℃下热处理10-20min,然后以1-3℃/s的速率冷却至45℃,保温,最后再于3-5倍的海藻酸钠水溶液中分散均匀,再水洗、干燥,即可得到预改性的累托石剂;
S03:将碳纳米管按照重量比1:(5-7)送入到调节改性液中,于500-600r/min的转速下搅拌30-40min,搅拌温度为40-45℃,得到碳纳米管改性复配液;
S04:向S02的预改性的累托石剂中加入预改性的累托石剂总量10-20%的碳纳米管改性复配液,然后球磨处理,球磨转速为1450-1550r/min,球磨时间为1-2h,球磨结束、水洗、干燥,得到碳纳米管复配改性累托石剂。
本实施例的碳纳米管为多壁碳纳米管;所述多壁碳纳米管直径为55-65nm,长度为20-50μm;所述海藻酸钠水溶液的质量分数为10-15%。
本实施例的调节改性液包括以下重量份原料:
4-8份针状硅灰石、25-30份去离子水、硝酸铈水溶液1-3份、0.25-0.45份柠檬酸和0.5-1.0份顺丁烯二酸二仲辛酯磺酸钠。
本实施例的针状硅灰石的长径比为(26-28):1;所述硝酸铈水溶液的质量分数为0.5-1%。
本实施例的浸渍胶液的制备方法为:
S11:将20-30份丙烯酸乳液、2-5份聚乙烯蜡乳液加入到45-55份乙醇溶剂中,搅拌均匀,得到胶液基体;
S12:将1-3份油酸、0.45-0.55份N-2-氨乙基-3-氨丙基三甲氧基硅烷加入到胶液基体中,随后再加入2-5份氨基硅油、1-3份二乙烯基苯,搅拌充分,得到浸渍胶液。
本实施例的聚乙烯蜡乳液为软化点100℃以上的聚乙烯蜡,固体含量为30-35%,粒径50-80nm。
本实施例的等离子体箱内辐照处理的辐照功率为300-350W,辐照时间为20-30min;所述浸渍改性处理的浸渍压力为12-14MPa,浸渍时间为25-30min。
实施例1.
本实施例的一种高抗水防油的食品包装纸制备工艺,包括以下步骤:
步骤一:将5份壳聚糖水溶液、1份十二烷基三甲基溴化铵加入到15份质量分数2%的盐酸溶液中搅拌均匀,然后加入2份羟乙基纤维素、0.25份硫酸镧,继续搅拌充分,得到壳聚糖复调液;
步骤二:木浆纤维、竹纤维按照重量比1.5:2混合,通过打浆机进行打浆,打浆度控制在30°SR,然后加入木浆纤维总量2%的壳聚糖复调液,一级搅拌反应,得到混浆料;
步骤三:然后再加入混浆料总量4%的碳纳米管复配改性累托石剂、混浆料总量1%的瓜豆胶,二级搅拌反应,搅拌结束,得到待用浆;
步骤四:随后再将待用浆进行抄纸、烘干制得基体纸;
步骤五:将基体纸送入到等离子体箱内辐照处理,辐照结束,得到辐照型改性纸体;
步骤六:最后再将辐照型改性纸体置于浸渍胶液中浸渍改性处理,改性结束,得到本发明的高抗水防油的食品包装纸。
本实施例的壳聚糖水溶液的质量分数为5%。
本实施例的一级搅拌反应的转速为350r/min,搅拌时间为20min;所述二级搅拌反应的转速为750r/min,搅拌时间为5min。
本实施例的碳纳米管复配改性累托石剂的制备方法为:
S01:将累托石按照重量比1:5加入到浓硫酸中,于350W的超声下超声处理5min,然后水洗、干燥;
S02:S01产物再于150℃下热处理10min,然后以1℃/s的速率冷却至45℃,保温,最后再于3倍的海藻酸钠水溶液中分散均匀,再水洗、干燥,即可得到预改性的累托石剂;
S03:将碳纳米管按照重量比1:5送入到调节改性液中,于500r/min的转速下搅拌30min,搅拌温度为40℃,得到碳纳米管改性复配液;
S04:向S02的预改性的累托石剂中加入预改性的累托石剂总量10%的碳纳米管改性复配液,然后球磨处理,球磨转速为1450r/min,球磨时间为1h,球磨结束、水洗、干燥,得到碳纳米管复配改性累托石剂。
本实施例的碳纳米管为多壁碳纳米管;所述多壁碳纳米管直径为55nm,长度为20μm;所述海藻酸钠水溶液的质量分数为10%。
本实施例的调节改性液包括以下重量份原料:
4份针状硅灰石、25份去离子水、硝酸铈水溶液1份、0.25份柠檬酸和0.5份顺丁烯二酸二仲辛酯磺酸钠。
本实施例的针状硅灰石的长径比为26:1;所述硝酸铈水溶液的质量分数为0.5%。
本实施例的浸渍胶液的制备方法为:
S11:将20份丙烯酸乳液、2份聚乙烯蜡乳液加入到45份乙醇溶剂中,搅拌均匀,得到胶液基体;
S12:将1份油酸、0.45份N-2-氨乙基-3-氨丙基三甲氧基硅烷加入到胶液基体中,随后再加入2份氨基硅油、1份二乙烯基苯,搅拌充分,得到浸渍胶液。
本实施例的聚乙烯蜡乳液为软化点100℃以上的聚乙烯蜡,固体含量为30%,粒径50nm。
本实施例的等离子体箱内辐照处理的辐照功率为300W,辐照时间为20min;所述浸渍改性处理的浸渍压力为12MPa,浸渍时间为25min。
实施例2.
本实施例的一种高抗水防油的食品包装纸制备工艺,包括以下步骤:
步骤一:将10份壳聚糖水溶液、3份十二烷基三甲基溴化铵加入到20份质量分数2%的盐酸溶液中搅拌均匀,然后加入4份羟乙基纤维素、0.45份硫酸镧,继续搅拌充分,得到壳聚糖复调液;
步骤二:木浆纤维、竹纤维按照重量比1:2混合,通过打浆机进行打浆,打浆度控制在35°SR,然后加入木浆纤维总量5%的壳聚糖复调液,一级搅拌反应,得到混浆料;
步骤三:然后再加入混浆料总量8%的碳纳米管复配改性累托石剂、混浆料总量2%的瓜豆胶,二级搅拌反应,搅拌结束,得到待用浆;
步骤四:随后再将待用浆进行抄纸、烘干制得基体纸;
步骤五:将基体纸送入到等离子体箱内辐照处理,辐照结束,得到辐照型改性纸体;
步骤六:最后再将辐照型改性纸体置于浸渍胶液中浸渍改性处理,改性结束,得到本发明的高抗水防油的食品包装纸。
本实施例的壳聚糖水溶液的质量分数为8%。
本实施例的一级搅拌反应的转速为450r/min,搅拌时间为30min;所述二级搅拌反应的转速为850r/min,搅拌时间为10min。
本实施例的碳纳米管复配改性累托石剂的制备方法为:
S01:将累托石按照重量比1:5加入到浓硫酸中,于450W的超声下超声处理10min,然后水洗、干燥;
S02:S01产物再于160℃下热处理20min,然后以3℃/s的速率冷却至45℃,保温,最后再于5倍的海藻酸钠水溶液中分散均匀,再水洗、干燥,即可得到预改性的累托石剂;
S03:将碳纳米管按照重量比1:7送入到调节改性液中,于600r/min的转速下搅拌40min,搅拌温度为45℃,得到碳纳米管改性复配液;
S04:向S02的预改性的累托石剂中加入预改性的累托石剂总量20%的碳纳米管改性复配液,然后球磨处理,球磨转速为1550r/min,球磨时间为2h,球磨结束、水洗、干燥,得到碳纳米管复配改性累托石剂。
本实施例的碳纳米管为多壁碳纳米管;所述多壁碳纳米管直径为65nm,长度为50μm;所述海藻酸钠水溶液的质量分数为15%。
本实施例的调节改性液包括以下重量份原料:
8份针状硅灰石、30份去离子水、硝酸铈水溶液3份、0.45份柠檬酸和1.0份顺丁烯二酸二仲辛酯磺酸钠。
本实施例的针状硅灰石的长径比为28:1;所述硝酸铈水溶液的质量分数为1%。
本实施例的浸渍胶液的制备方法为:
S11:将30份丙烯酸乳液、5份聚乙烯蜡乳液加入到55份乙醇溶剂中,搅拌均匀,得到胶液基体;
S12:将3份油酸、0.55份N-2-氨乙基-3-氨丙基三甲氧基硅烷加入到胶液基体中,随后再加入5份氨基硅油、3份二乙烯基苯,搅拌充分,得到浸渍胶液。
本实施例的聚乙烯蜡乳液为软化点100℃以上的聚乙烯蜡,固体含量为35%,粒径80nm。
本实施例的等离子体箱内辐照处理的辐照功率为350W,辐照时间为30min;所述浸渍改性处理的浸渍压力14MPa,浸渍时间为30min。
实施例3.
本实施例的一种高抗水防油的食品包装纸制备工艺,包括以下步骤:
步骤一:将7.5份壳聚糖水溶液、2份十二烷基三甲基溴化铵加入到17.5份质量分数2%的盐酸溶液中搅拌均匀,然后加入3份羟乙基纤维素、0.30份硫酸镧,继续搅拌充分,得到壳聚糖复调液;
步骤二:木浆纤维、竹纤维按照重量比1.5:2.5混合,通过打浆机进行打浆,打浆度控制在32.5°SR,然后加入木浆纤维总量3.5%的壳聚糖复调液,一级搅拌反应,得到混浆料;
步骤三:然后再加入混浆料总量6%的碳纳米管复配改性累托石剂、混浆料总量1.5%的瓜豆胶,二级搅拌反应,搅拌结束,得到待用浆;
步骤四:随后再将待用浆进行抄纸、烘干制得基体纸;
步骤五:将基体纸送入到等离子体箱内辐照处理,辐照结束,得到辐照型改性纸体;
步骤六:最后再将辐照型改性纸体置于浸渍胶液中浸渍改性处理,改性结束,得到本发明的高抗水防油的食品包装纸。
本实施例的壳聚糖水溶液的质量分数为6.5%。
本实施例的一级搅拌反应的转速为400r/min,搅拌时间为25min;所述二级搅拌反应的转速为800r/min,搅拌时间为7.5min。
本实施例的碳纳米管复配改性累托石剂的制备方法为:
S01:将累托石按照重量比1:5加入到浓硫酸中,于400W的超声下超声处理7.5min,然后水洗、干燥;
S02:S01产物再于155℃下热处理15min,然后以2℃/s的速率冷却至45℃,保温,最后再于4倍的海藻酸钠水溶液中分散均匀,再水洗、干燥,即可得到预改性的累托石剂;
S03:将碳纳米管按照重量比1:6送入到调节改性液中,于550r/min的转速下搅拌35min,搅拌温度为42.5℃,得到碳纳米管改性复配液;
S04:向S02的预改性的累托石剂中加入预改性的累托石剂总量15%的碳纳米管改性复配液,然后球磨处理,球磨转速为1500r/min,球磨时间为1.5h,球磨结束、水洗、干燥,得到碳纳米管复配改性累托石剂。
本实施例的碳纳米管为多壁碳纳米管;所述多壁碳纳米管直径为60nm,长度为35μm;所述海藻酸钠水溶液的质量分数为12.5%。
本实施例的调节改性液包括以下重量份原料:
6份针状硅灰石、27.5份去离子水、硝酸铈水溶液2份、0.30份柠檬酸和0.75份顺丁烯二酸二仲辛酯磺酸钠。
本实施例的针状硅灰石的长径比为27:1;所述硝酸铈水溶液的质量分数为0.75%。
本实施例的浸渍胶液的制备方法为:
S11:将25份丙烯酸乳液、3.5份聚乙烯蜡乳液加入到50份乙醇溶剂中,搅拌均匀,得到胶液基体;
S12:将2份油酸、0.50份N-2-氨乙基-3-氨丙基三甲氧基硅烷加入到胶液基体中,随后再加入3.5份氨基硅油、2份二乙烯基苯,搅拌充分,得到浸渍胶液。
本实施例的聚乙烯蜡乳液为软化点100℃以上的聚乙烯蜡,固体含量为32%,粒径65nm。
本实施例的等离子体箱内辐照处理的辐照功率为325W,辐照时间为5min;所述浸渍改性处理的浸渍压力为13MPa,浸渍时间为7.5min。
对比例1.
与实施例3不同是未采用壳聚糖复调液处理。
对比例2.
与实施例3不同是壳聚糖复调液制备方法不同:
将7.5份壳聚糖水溶液加入到17.5份去离子水中搅拌均匀,然后加入3份羟乙基纤维素、0.30份硫酸镧,继续搅拌充分,得到壳聚糖复调液。
对比例3.
与实施例3不同是待用浆制备方法不同:
步骤一:将7.5份壳聚糖水溶液、2份十二烷基三甲基溴化铵加入到17.5份质量分数2%的盐酸溶液中搅拌均匀,然后加入3份羟乙基纤维素、0.30份硫酸镧,继续搅拌充分,得到壳聚糖复调液;
步骤二:木浆纤维、竹纤维按照重量比1.5:2.5混合,通过打浆机进行打浆,打浆度控制在32.5°SR,然后加入木浆纤维总量3.5%的壳聚糖复调液,得到混浆料,然后再加入混浆料总量6%的碳纳米管复配改性累托石剂、混浆料总量1.5%的瓜豆胶,搅拌结束,得到待用浆;搅拌反应的转速为800r/min,搅拌时间为25min。
对比例4.
与实施例3不同是未加入碳纳米管复配改性累托石剂。
对比例5.
与实施例3不同是碳纳米管复配改性累托石剂制备中预改性的累托石剂采用累托石直接代替。
对比例6.
与实施例3不同是碳纳米管复配改性累托石剂制备中碳纳米管原料采用石墨烯代替。
对比例7.
与实施例3不同是碳纳米管复配改性累托石剂制备中未采用调节改性液球磨处理。
对比例8.
与实施例3不同是未采用浸渍胶液处理。
对比例9.
与实施例3不同是浸渍胶液制备中未加入油酸、N-2-氨乙基-3-氨丙基三甲氧基硅烷。
待测产品在常规条件下测试:
待测产品放在光学接触角测量仪上进行接触角测量,测量在室温25℃,相对湿度为75%下进行,测量水滴大小为3ul,对测量的纸张表面取3个点进行测量,最终接触角取平均值,测量其接触角;同时再测试其水蒸气透光率、防油等级以及撕裂度性能;
以及将产品置于2%的盐酸酸雾条件下放置24h后,测试其耐酸腐性能。
将实施例1-3及对比例1-9产品进行性能测试;
从对比例1-9及实施例3中看出,实施例3的产品在常规条件下,防油等级可高达12,横向撕裂度(mN)高达239mN,水蒸气透光率可低至528g/m2.24h,接触角高达152.9度,产品的防油、防水、阻隔性以及撕裂强度可实现协调式改进,以及产品在酸腐条件下性能稳定性优异;
产品中未采用壳聚糖复调液处理,产品的防油、横向撕裂度以及防水性能均有变差趋势,以及壳聚糖复调液制备方法不同,产品的性能效果不同,只有采用本发明的方法制备的壳聚糖复调液性能效果最显著;
以及产品中未加入碳纳米管复配改性累托石剂,产品的性能变化最为明显,碳纳米管复配改性累托石剂中碳纳米管采用石墨烯代替,产品的性能存在变差趋势,可能由于石墨烯为片状结构,与层状结构的累托石发生互穿插效应,导致累托石层间状结构封堵,影响累托石分散性以及性能效应,导致产品的性能变差;
同时碳纳米管复配改性累托石剂制备中预改性的累托石剂采用累托石直接代替、未采用调节改性液球磨处理,产品的性能均有变差趋势,只有采用本发明的方法制备的碳纳米管复配改性累托石剂,产品的性能效果最为显著;
此外,产品中未加入碳纳米管复配改性累托石剂、未采用浸渍胶液处理,产品的性能均有变差趋势,只有采用二者协配,协同增效,产品的防油、防水、阻隔性以及撕裂强度可实现协调式改进,以及产品在酸腐条件下性能稳定性优异。
此外,本发明的发明人发现未采用调节改性液球磨处理,产品的性能变差趋势明显,对此,本发明对其进一步的探究处理。
本发明通过调节改性液对产品性能进一步的探究
实验例1.
与实施例3相同,唯有不同是调节改性液中未加入针状硅灰石。
实验例2.
与实施例3相同,唯有不同是调节改性液中未加入顺丁烯二酸二仲辛酯磺酸钠。
实验例3.
与实施例3相同,唯有不同是调节改性液中未加入硝酸铈水溶液。
实验例4.
与实施例3相同,唯有不同是针状硅灰石采用纳米二氧化硅代替。
从实验例1-4可看出,调节改性液中未加入针状硅灰石,产品的性能在调节改性液其他因素中,性能变差最为明显,调节改性液中未加入硝酸铈水溶液、顺丁烯二酸二仲辛酯磺酸钠,产品的性能均有变差趋势,只有采用针状硅灰石配合硝酸铈水溶液、顺丁烯二酸二仲辛酯磺酸钠,产品的性能效果最为显著,同时针状硅灰石采用纳米二氧化硅代替,产品的性能均有变差趋势,针状硅灰石的选用具有专有性,只有采用针状硅灰石配比本发明调节改性液中的其他原料,产品的性能效果最为显著,采用其他原料配比,均达不到本发明的技术效果,制备产品的防油、防水、阻隔性以及撕裂强度可实现协调式改进,以及产品在酸腐条件下性能稳定性优异。
对于本领域技术人员而言,显然本发明不限于上述示范性实施例的细节,而且在不背离本发明的精神或基本特征的情况下,能够以其他的具体形式实现本发明。因此,无论从哪一点来看,均应将实施例看作是示范性的,而且是非限制性的,本发明的范围由所附权利要求而不是上述说明限定,因此旨在将落在权利要求的等同要件的含义和范围内的所有变化囊括在本发明内。
此外,应当理解,虽然本说明书按照实施方式加以描述,但并非每个实施方式仅包含一个独立的技术方案,说明书的这种叙述方式仅仅是为清楚起见,本领域技术人员应当将说明书作为一个整体,各实施例中的技术方案也可以经适当组合,形成本领域技术人员可以理解的其他实施方式。
Claims (10)
1.一种高抗水防油的食品包装纸制备工艺,其特征在于,包括以下步骤:
步骤一:将5-10份壳聚糖水溶液、1-3份十二烷基三甲基溴化铵加入到15-20份质量分数2%的盐酸溶液中搅拌均匀,然后加入2-4份羟乙基纤维素、0.25-0.45份硫酸镧,继续搅拌充分,得到壳聚糖复调液;
步骤二:木浆纤维、竹纤维按照重量比1.5:(2-3)混合,通过打浆机进行打浆,打浆度控制在30-35°SR,然后加入木浆纤维总量2-5%的壳聚糖复调液,一级搅拌反应,得到混浆料;
步骤三:然后再加入混浆料总量4-8%的碳纳米管复配改性累托石剂、混浆料总量1-2%的瓜豆胶,二级搅拌反应,搅拌结束,得到待用浆;
步骤四:随后再将待用浆进行抄纸、烘干制得基体纸;
步骤五:将基体纸送入到等离子体箱内辐照处理,辐照结束,得到辐照型改性纸体;
步骤六:最后再将辐照型改性纸体置于浸渍胶液中浸渍改性处理,改性结束,得到本发明的高抗水防油的食品包装纸。
2.根据权利要求1所述的一种高抗水防油的食品包装纸制备工艺,其特征在于,所述壳聚糖水溶液的质量分数为5-8%。
3.根据权利要求1所述的一种高抗水防油的食品包装纸制备工艺,其特征在于,所述一级搅拌反应的转速为350-450r/min,搅拌时间为20-30min;所述二级搅拌反应的转速为750-850r/min,搅拌时间为5-10min。
4.根据权利要求1所述的一种高抗水防油的食品包装纸制备工艺,其特征在于,所述碳纳米管复配改性累托石剂的制备方法为:
S01:将累托石按照重量比1:5加入到浓硫酸中,于350-450W的超声下超声处理5-10min,然后水洗、干燥;
S02:S01产物再于150-160℃下热处理10-20min,然后以1-3℃/s的速率冷却至45℃,保温,最后再于3-5倍的海藻酸钠水溶液中分散均匀,再水洗、干燥,即可得到预改性的累托石剂;
S03:将碳纳米管按照重量比1:(5-7)送入到调节改性液中,于500-600r/min的转速下搅拌30-40min,搅拌温度为40-45℃,得到碳纳米管改性复配液;
S04:向S02的预改性的累托石剂中加入预改性的累托石剂总量10-20%的碳纳米管改性复配液,然后球磨处理,球磨转速为1450-1550r/min,球磨时间为1-2h,球磨结束、水洗、干燥,得到碳纳米管复配改性累托石剂。
5.根据权利要求4所述的一种高抗水防油的食品包装纸制备工艺,其特征在于,所述碳纳米管为多壁碳纳米管;所述多壁碳纳米管直径为55-65nm,长度为20-50μm;所述海藻酸钠水溶液的质量分数为10-15%。
6.根据权利要求4所述的一种高抗水防油的食品包装纸制备工艺,其特征在于,所述调节改性液包括以下重量份原料:
4-8份针状硅灰石、25-30份去离子水、硝酸铈水溶液1-3份、0.25-0.45份柠檬酸和0.5-1.0份顺丁烯二酸二仲辛酯磺酸钠。
7.根据权利要求6所述的一种高抗水防油的食品包装纸制备工艺,其特征在于,所述针状硅灰石的长径比为(26-28):1;所述硝酸铈水溶液的质量分数为0.5-1%。
8.根据权利要求1所述的一种高抗水防油的食品包装纸制备工艺,其特征在于,所述浸渍胶液的制备方法为:
S11:将20-30份丙烯酸乳液、2-5份聚乙烯蜡乳液加入到45-55份乙醇溶剂中,搅拌均匀,得到胶液基体;
S12:将1-3份油酸、0.45-0.55份N-2-氨乙基-3-氨丙基三甲氧基硅烷加入到胶液基体中,随后再加入2-5份氨基硅油、1-3份二乙烯基苯,搅拌充分,得到浸渍胶液。
9.根据权利要求8所述的一种高抗水防油的食品包装纸制备工艺,其特征在于,所述聚乙烯蜡乳液为软化点100℃以上的聚乙烯蜡,固体含量为30-35%,粒径50-80nm。
10.根据权利要求1所述的一种高抗水防油的食品包装纸制备工艺,其特征在于,所述等离子体箱内辐照处理的辐照功率为300-350W,辐照时间为20-30min;所述浸渍改性处理的浸渍压力为12-14MPa,浸渍时间为25-30min。
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