CN116497633A - 一种无氟防油包装纸及其制备方法 - Google Patents
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Classifications
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- D—TEXTILES; PAPER
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- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
- D21H27/10—Packing paper
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
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- D21H11/00—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/20—Macromolecular organic compounds
- D21H17/21—Macromolecular organic compounds of natural origin; Derivatives thereof
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- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/63—Inorganic compounds
- D21H17/67—Water-insoluble compounds, e.g. fillers, pigments
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- D21H19/00—Coated paper; Coating material
- D21H19/36—Coatings with pigments
- D21H19/38—Coatings with pigments characterised by the pigments
- D21H19/385—Oxides, hydroxides or carbonates
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- D—TEXTILES; PAPER
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- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H19/00—Coated paper; Coating material
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- D—TEXTILES; PAPER
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- D21H19/00—Coated paper; Coating material
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- D21H19/00—Coated paper; Coating material
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- D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W90/00—Enabling technologies or technologies with a potential or indirect contribution to greenhouse gas [GHG] emissions mitigation
- Y02W90/10—Bio-packaging, e.g. packing containers made from renewable resources or bio-plastics
Abstract
本发明涉及包装纸领域,具体是一种无氟防油包装纸及其制备方法,采用针叶木浆部分代替蔗渣浆,在纸浆中引入复合淀粉;复合淀粉为将玉米淀粉在水热条件下润胀、糊化,利用脂肪胺和脂肪酸两种配体,通过主客体识别与疏水相互作用,有选择性地引入特定官能团,构建与壳聚糖结构相似的复合淀粉;在防油涂料中引入大豆分离蛋白、金针菇多糖、复合淀粉构建多重互穿交联网络;用锌、钴离子与甲基咪唑合成金属有机骨架,通过热处理构建缺陷骨架,拓宽孔径结构,然后以硫代乙酰胺作为硫源,回流硫化生成具有相互连通的孔道结构、较高的孔隙率和大量暴露的活性中心的复合氧化锌。
Description
技术领域
本发明涉及包装纸领域,具体是一种无氟防油包装纸及其制备方法。
背景技术
随着限塑令的推广,纸基材料越来越多地被应用在包装领域,虽然纸基材料源于天然植物纤维,但是因自身性能限制使其应用于包装领域时存在不足,比如阻隔性有限,防油效果不佳等。
目前市场主要采用将防水、防油材料涂布或淋膜在纸张表面,从而提高纸张的防水或防油性,常用的纸张防水材料包括聚丙烯、聚乙烯、聚苯乙烯、聚氯乙烯等,防油材料应用最多的是含氟防油剂,所用防水材料大多为石油基聚合物,在自然界中难以降解,在焚烧时会释放出有毒有害的物质,所用含氟防油剂在自然环境中会氧化降解,生成具有生物累积性的羧酸盐、全氟羧酸,从而危害人体健康与自然环境。
发明内容
本发明的目的在于提供一种无氟防油包装纸及其制备方法,以解决现有技术中的问题。
为了解决上述技术问题,本发明提供如下技术方案:
一种无氟防油包装纸的制备方法,包括以下步骤:
S1:将纸浆纤维打浆,配置成纸浆纤维悬浮液,依次加入碳酸钙、复合淀粉,抄纸,压榨,干燥,得到原纸;
S2:用大豆分离蛋白、复合淀粉、金针菇多糖、复合氧化锌制备防油涂料;
S3:将防油涂料涂覆在原纸表面,得到一种无氟防油包装纸。
进一步的,纸浆纤维的组成为针叶木浆与蔗渣浆以质量比3:2复配得到。
进一步的,步骤S1中打浆的工作条件为:打浆疏解至浆浓为7-9%,打浆度为58-64°SR,纸浆纤维悬浮液中纸浆纤维的浓度为0.6-0.8%。
进一步的,步骤S1中抄纸的工作条件为:用纸页成型器抄造定量为60g/m2的手抄片;压榨的工作条件为:压力为0.5Mpa,时间为5min。
进一步的,以质量份数计,原纸的组成为:复合淀粉4-6份、碳酸钙10-12份、纸浆纤维78-84份。
进一步的,复合淀粉的制备包括以下步骤:
1)将玉米淀粉、去离子水混合,在90-95℃保温1-2h,制得玉米淀粉糊液;
2)将十八烷基胺、盐酸、去离子水混合,在90-95℃保温30min,得到十八烷基胺盐溶液;将冰乙酸、去离子水、棕榈酸混合,加热至90℃保温20-30min,得到棕榈酸盐溶液;
3)将十八烷基胺盐溶液与玉米淀粉糊液混合,升温至95℃保温20-30min,加入棕榈酸与玉米淀粉糊液混合液,自然冷却,冷冻干燥,得到复合淀粉。
进一步的,金针菇多糖的制备包括以下步骤:
将金针菇粉、去离子水混合,75-80℃保温4-5h,离心,加入正丁醇与三氯甲烷的混合液,静置10min,离心,加入95%乙醇溶液沉淀,过滤,用截留分子质量4kDa的透析袋透析,冷冻干燥,得到金针菇多糖。
进一步的,防油涂料中大豆分离蛋白、复合淀粉、金针菇多糖的质量比为1:2:1;复合氧化锌与大豆分离蛋白的质量比为2-3%。
进一步的,复合氧化锌的制备包括以下步骤:
(1)将六水合硝酸锌、六水合硝酸钴、甲醇混合,加入二甲基咪唑与甲醇的混合液,在55-60℃保温20-30min,然后在18-30℃保温22-24h,离心,用甲醇洗涤3-5次,干燥,得到金属基有机框架;
(2)将金属基有机框架升温至340℃煅烧1h,用硫代乙酰胺作为硫源,对煅烧后的金属基有机框架进行100℃回流硫化,升温至380℃煅烧1h,得到复合氧化锌。
本发明的有益效果:
本发明提供一种无氟防油包装纸及其制备方法,制备的无氟防油包装纸,绿色环保,具有高阻隔性与机械强度的同时,兼具优秀的防水性、防油性、抗菌性。
现有防油包装纸直接以蔗渣浆为原料制备,虽然绿色环保,变废为宝,但是制备的包装纸存在机械强度差等问题,本发明采用针叶木浆部分代替蔗渣浆,通过控制质量比,在纸浆中引入复合淀粉,从而增加纤维间交织能力,减少细小组分的过多流失,复合淀粉的引入不仅可以提供较多的纤维氢键结合,同时在高温热压环境下会产生黏合剂作用,有效增加包装纸的紧度,进一步提升其机械强度,从而有助于降低油和水的渗透速率,赋予包装纸高阻隔性。本发明不仅充分利用了蔗渣等废弃的植物纤维资源,而且完全可降解,符合现行绿色生产要求。
本发明复合淀粉为将玉米淀粉在水热条件下润胀、糊化,利用脂肪胺和脂肪酸两种配体,通过主客体识别与疏水相互作用,有选择性地引入特定官能团,构建与壳聚糖结构相似的复合淀粉,从而提高其在纸浆中分散的均匀性,利用复合淀粉中氢键、范德华力和物理缠结的多作用力,提升包装纸原纸的机械强度与高阻隔性。鉴于复合淀粉的溶性良好,将其作为助剂在防油涂料中添加,分布于网络结构中,提升防油涂料中结合力,从而降低纸张孔隙,大幅提升包装纸的疏水性。
在防油涂料中引入大豆分离蛋白、金针菇多糖、复合淀粉构建多重互穿交联网络,其中大豆蛋白具有高生物相容性,但是生成凝胶具有力学性能不足的缺点,而多羟基结构的高生物活性的金针菇多糖能有效改善大豆蛋白凝胶的机械强度,通过控制大豆分离蛋白、金针菇多糖、复合淀粉的质量比,构建稳定的防油涂层;用锌、钴离子与甲基咪唑合成金属有机骨架,通过热处理构建缺陷骨架,拓宽孔径结构,然后以硫代乙酰胺作为硫源,回流硫化生成具有相互连通的孔道结构、较高的孔隙率和大量暴露的活性中心的复合氧化锌,从而提高氧化锌与防油涂料中大豆分离蛋白、金针菇多糖、复合淀粉结合力度,其中复合氧化锌的引入在起到对防油涂料增韧的同时,有效改善防油涂料的抗菌、耐水性,从而提高包装纸的使用寿命。
具体实施方式
下面将结合本发明的实施例,对本发明中的技术方案进行清楚、完整的描述,显然,所描述的实施例仅是本发明的一部分实施例,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。
需要说明,若本发明实施例中有涉及方向性指示诸如上、下、左、右、前、后……,则该方向性指示仅用于解释在某一特定姿态如各部件之间的相对位置关系、运动情况等,如果该特定姿态发生改变时,则该方向性指示也相应地随之改变。另外,各个实施例之间的技术方案可以相互结合,但是必须是以本领域普通技术人员能够实现为基础,当技术方案的结合出现相互矛盾或无法实现时应当认为这种技术方案的结合不存在,也不在本发明要求的保护范围之内。
以下结合具体实施例对本发明的技术方案作进一步详细说明,应当理解,以下实施例仅仅用以解释本发明,并不用于限定本发明。
实施例1:一种无氟防油包装纸的制备方法,包括以下步骤:
S1:将纸浆纤维打浆,配置成纸浆纤维悬浮液,依次加入碳酸钙、复合淀粉,抄纸,压榨,干燥,得到原纸;
打浆的工作条件为:打浆疏解至浆浓为7%,打浆度为58°SR,纸浆纤维悬浮液中纸浆纤维的浓度为0.6%;
纸浆纤维的组成为针叶木浆与蔗渣浆以质量比3:2复配得到;
抄纸的工作条件为:用纸页成型器抄造定量为60g/m2的手抄片;压榨的工作条件为:压力为0.5Mpa,时间为5min;
以质量份数计,原纸的组成为:复合淀粉4份、碳酸钙10份、纸浆纤维78份;
S2:用大豆分离蛋白、复合淀粉、金针菇多糖、复合氧化锌制备防油涂料;
防油涂料中大豆分离蛋白、复合淀粉、金针菇多糖的质量比为1:2:1;复合氧化锌与大豆分离蛋白的质量比为2%;
复合淀粉的制备包括以下步骤:
1)将3g玉米淀粉、97mL去离子水混合,在90℃保温2h,制得玉米淀粉糊液;
2)将2.7g十八烷基胺、盐酸、100mL去离子水混合,在90℃保温30min,得到十八烷基胺盐溶液;将0.57mL冰乙酸、100mL去离子水、2.56g棕榈酸混合,加热至90℃保温20min,得到棕榈酸盐溶液;
3)将7mL十八烷基胺盐溶液与100mL玉米淀粉糊液混合,升温至95℃保温20min,加入7mL棕榈酸与100mL玉米淀粉糊液混合液,自然冷却,冷冻干燥,得到复合淀粉;
金针菇多糖的制备包括以下步骤:
将2g金针菇粉、40mL去离子水混合,75℃保温5h,离心,加入10mL正丁醇与40mL三氯甲烷的混合液,静置10min,离心,加入95%乙醇溶液沉淀,过滤,用截留分子质量4kDa的透析袋透析,冷冻干燥,得到金针菇多糖;
复合氧化锌的制备包括以下步骤:
(1)将6mmol六水合硝酸锌、2mmol六水合硝酸钴、100mL甲醇混合,加入56mmol二甲基咪唑与100mL甲醇的混合液,在55℃保温30min,然后在18℃保温24h,离心,用甲醇洗涤3次,干燥,得到金属基有机框架;
(2)将1g金属基有机框架升温至340℃煅烧1h,用硫代乙酰胺作为硫源,对煅烧后的金属基有机框架进行100℃回流硫化,升温至380℃煅烧1h,得到复合氧化锌;
S3:将防油涂料涂覆在原纸表面,得到一种无氟防油包装纸。
实施例2:一种无氟防油包装纸的制备方法,包括以下步骤:
S1:将纸浆纤维打浆,配置成纸浆纤维悬浮液,依次加入碳酸钙、复合淀粉,抄纸,压榨,干燥,得到原纸;
打浆的工作条件为:打浆疏解至浆浓为8%,打浆度为60°SR,纸浆纤维悬浮液中纸浆纤维的浓度为0.7%;
纸浆纤维的组成为针叶木浆与蔗渣浆以质量比3:2复配得到;
抄纸的工作条件为:用纸页成型器抄造定量为60g/m2的手抄片;压榨的工作条件为:压力为0.5Mpa,时间为5min;
以质量份数计,原纸的组成为:复合淀粉5份、碳酸钙11份、纸浆纤维80份;
S2:用大豆分离蛋白、复合淀粉、金针菇多糖、复合氧化锌制备防油涂料;
防油涂料中大豆分离蛋白、复合淀粉、金针菇多糖的质量比为1:2:1;复合氧化锌与大豆分离蛋白的质量比为2.5%;
复合淀粉的制备包括以下步骤:
1)将3g玉米淀粉、97mL去离子水混合,在92℃保温1.5h,制得玉米淀粉糊液;
2)将2.7g十八烷基胺、盐酸、100mL去离子水混合,在92℃保温30min,得到十八烷基胺盐溶液;将0.57mL冰乙酸、100mL去离子水、2.56g棕榈酸混合,加热至90℃保温25min,得到棕榈酸盐溶液;
3)将7mL十八烷基胺盐溶液与100mL玉米淀粉糊液混合,升温至95℃保温25min,加入7mL棕榈酸与100mL玉米淀粉糊液混合液,自然冷却,冷冻干燥,得到复合淀粉;
金针菇多糖的制备包括以下步骤:
将2g金针菇粉、40mL去离子水混合,78℃保温4.5h,离心,加入10mL正丁醇与40mL三氯甲烷的混合液,静置10min,离心,加入95%乙醇溶液沉淀,过滤,用截留分子质量4kDa的透析袋透析,冷冻干燥,得到金针菇多糖;
复合氧化锌的制备包括以下步骤:
(1)将6mmol六水合硝酸锌、2mmol六水合硝酸钴、100mL甲醇混合,加入56mmol二甲基咪唑与100mL甲醇的混合液,在58℃保温25min,然后在25℃保温23h,离心,用甲醇洗涤4次,干燥,得到金属基有机框架;
(2)将1g金属基有机框架升温至340℃煅烧1h,用硫代乙酰胺作为硫源,对煅烧后的金属基有机框架进行100℃回流硫化,升温至380℃煅烧1h,得到复合氧化锌;
S3:将防油涂料涂覆在原纸表面,得到一种无氟防油包装纸。
实施例3:一种无氟防油包装纸的制备方法,包括以下步骤:
S1:将纸浆纤维打浆,配置成纸浆纤维悬浮液,依次加入碳酸钙、复合淀粉,抄纸,压榨,干燥,得到原纸;
打浆的工作条件为:打浆疏解至浆浓为9%,打浆度为64°SR,纸浆纤维悬浮液中纸浆纤维的浓度为0.8%;
纸浆纤维的组成为针叶木浆与蔗渣浆以质量比3:2复配得到;
抄纸的工作条件为:用纸页成型器抄造定量为60g/m2的手抄片;压榨的工作条件为:压力为0.5Mpa,时间为5min;
以质量份数计,原纸的组成为:复合淀粉6份、碳酸钙12份、纸浆纤维84份;
S2:用大豆分离蛋白、复合淀粉、金针菇多糖、复合氧化锌制备防油涂料;
防油涂料中大豆分离蛋白、复合淀粉、金针菇多糖的质量比为1:2:1;复合氧化锌与大豆分离蛋白的质量比为3%;
复合淀粉的制备包括以下步骤:
1)将3g玉米淀粉、97mL去离子水混合,在95℃保温1h,制得玉米淀粉糊液;
2)将2.7g十八烷基胺、盐酸、100mL去离子水混合,在95℃保温30min,得到十八烷基胺盐溶液;将0.57mL冰乙酸、100mL去离子水、2.56g棕榈酸混合,加热至90℃保温30min,得到棕榈酸盐溶液;
3)将7mL十八烷基胺盐溶液与100mL玉米淀粉糊液混合,升温至95℃保温30min,加入7mL棕榈酸与100mL玉米淀粉糊液混合液,自然冷却,冷冻干燥,得到复合淀粉;
金针菇多糖的制备包括以下步骤:
将2g金针菇粉、40mL去离子水混合,80℃保温4h,离心,加入10mL正丁醇与40mL三氯甲烷的混合液,静置10min,离心,加入95%乙醇溶液沉淀,过滤,用截留分子质量4kDa的透析袋透析,冷冻干燥,得到金针菇多糖;
复合氧化锌的制备包括以下步骤:
(1)将6mmol六水合硝酸锌、2mmol六水合硝酸钴、100mL甲醇混合,加入56mmol二甲基咪唑与100mL甲醇的混合液,在60℃保温20min,然后在30℃保温22h,离心,用甲醇洗涤5次,干燥,得到金属基有机框架;
(2)将1g金属基有机框架升温至340℃煅烧1h,用硫代乙酰胺作为硫源,对煅烧后的金属基有机框架进行100℃回流硫化,升温至380℃煅烧1h,得到复合氧化锌;
S3:将防油涂料涂覆在原纸表面,得到一种无氟防油包装纸。
对比例1:以实施例3为对照组,防油涂料用玉米淀粉替换复合淀粉,其他工序正常。
对比例2:以实施例3为对照组,防油涂料没有金针菇多糖,其他工序正常。
对比例3:以实施例3为对照组,防油涂料没有大豆分离蛋白,其他工序正常。
对比例4:以实施例3为对照组,用氧化锌(Z476704:阿拉丁试剂)替换复合氧化锌,其他工序正常。
对比例5:以实施例3为对照组,复合氧化锌与大豆分离蛋白的质量比为1.9%,其他工序正常。
对比例6:以实施例3为对照组,复合氧化锌与大豆分离蛋白的质量比为3.1%,其他工序正常。
实施例与对比例中包装纸厚度为1mm,防油涂层厚度为300μm。
原料来源:
针叶木浆:取自某造纸企业,木素含量为5%;蔗渣浆:取自某造纸企业,木素含量为3%;金针菇粉:陕西金硕果业;大豆分离蛋白TR345:合肥郯润生物科技有限公司;玉米淀粉:武汉兴众诚科技有限公司;十八烷基胺O1408:西格玛奥德里奇(上海)贸易有限公司;棕榈酸P432956、六水合硝酸锌Z111703、六水合硝酸钴C112729、二甲基咪唑D106351、硫代乙酰胺T104039:阿拉丁试剂;碳酸钙、盐酸、冰乙酸、正丁醇、三氯甲烷、乙醇、甲醇,分析纯:国药集团试剂。
性能测试:对实施例1-3、对比例1-6所制得的包装纸进行性能测试:
抗张强度:参考GB/T12914-1991测定,采用抗张强度测定仪,裁剪成长220mm、宽15mm、厚1.6mm进行测定(夹具180mm);
抗菌性:采用大肠杆菌测试;
防油等级:参考TAPPIT559cm-12进行检测,用蓖麻油、甲苯和正庚烷配制防油等级从1-12级试验油;将滴定液从13mm的高度释放测试液滴至防油纸上,静置15s,抹去油滴,若油脂使得纸张表面变暗,未达到该液滴的防油等级,从最高等级的测试滴定液开始;
热水渗透性:参考GB/T36787-2018进行检测,放在衬有滤纸的平板上,100℃热水静置30min,观察有无变形、阴渗、渗漏,没有视为合格;
热油渗透性:参考GB/T36787-2018进行检测,放在衬有滤纸的平板上,100℃热油静置30min,观察有无变形、背面是否出现油印,没有视为合格;结果如下表;
本发明提供一种无氟防油包装纸及其制备方法,制备的无氟防油包装纸,绿色环保,具有高阻隔性与机械强度的同时,兼具优秀的防水性、防油性、抗菌性。
将实施例3与对比例1进行对比,在纸浆中引入复合淀粉,从而增加纤维间交织能力,减少细小组分的过多流失,复合淀粉的引入不仅可以提供较多的纤维氢键结合,同时在高温热压环境下会产生黏合剂作用,有效增加包装纸的紧度,进一步提升其机械强度,从而有助于降低油和水的渗透速率,赋予包装纸高阻隔性;复合淀粉为将玉米淀粉在水热条件下润胀、糊化,利用脂肪胺和脂肪酸两种配体,通过主客体识别与疏水相互作用,有选择性地引入特定官能团,构建与壳聚糖结构相似的复合淀粉,从而提高其在纸浆中分散的均匀性,利用复合淀粉中氢键、范德华力和物理缠结的多作用力,提升包装纸原纸的机械强度与高阻隔性;鉴于复合淀粉的溶性良好,将其作为助剂在防油涂料中添加,分布于网络结构中,提升防油涂料中结合力,从而降低纸张孔隙,大幅提升包装纸的疏水性。
将实施例3与对比例2、对比例3进行对比,在防油涂料中引入大豆分离蛋白、金针菇多糖、复合淀粉构建多重互穿交联网络,其中大豆蛋白具有高生物相容性,但是生成凝胶具有力学性能不足的缺点,而多羟基结构的高生物活性的金针菇多糖能有效改善大豆蛋白凝胶的机械强度,通过控制大豆分离蛋白、金针菇多糖、复合淀粉的质量比,构建稳定的防油涂层。
将实施例3与对比例4进行对比,用锌、钴离子与甲基咪唑合成金属有机骨架,通过热处理构建缺陷骨架,拓宽孔径结构,然后以硫代乙酰胺作为硫源,回流硫化生成具有相互连通的孔道结构、较高的孔隙率和大量暴露的活性中心的复合氧化锌,从而提高氧化锌与防油涂料中大豆分离蛋白、金针菇多糖、复合淀粉结合力度。
将实施例3与对比例5、对比例6进行对比,控制复合氧化锌的引入量,在起到对防油涂料增韧的同时,有效改善防油涂料的抗菌、耐水性,从而提高包装纸的使用寿命。
以上所述仅为本发明的为实施例,并非因此限制本发明的专利范围,凡是在本发明的发明构思下,利用本发明说明书所做的等效结构变换,或直接/间接运用在其他相关的技术领域均包括在本发明的专利保护范围内。
Claims (10)
1.一种无氟防油包装纸的制备方法,其特征在于,包括以下步骤:
S1:将纸浆纤维打浆,配置成纸浆纤维悬浮液,依次加入碳酸钙、复合淀粉,抄纸,压榨,干燥,得到原纸;
S2:用大豆分离蛋白、复合淀粉、金针菇多糖、复合氧化锌制备防油涂料;
S3:将防油涂料涂覆在原纸表面,得到一种无氟防油包装纸。
2.根据权利要求1所述的一种无氟防油包装纸的制备方法,其特征在于,纸浆纤维的组成为针叶木浆与蔗渣浆以质量比3:2复配得到。
3.根据权利要求1所述的一种无氟防油包装纸的制备方法,其特征在于,步骤S1中打浆的工作条件为:打浆疏解至浆浓为7-9%,打浆度为58-64°SR,纸浆纤维悬浮液中纸浆纤维的浓度为0.6-0.8%。
4.根据权利要求1所述的一种无氟防油包装纸的制备方法,其特征在于,步骤S1中抄纸的工作条件为:用纸页成型器抄造定量为60g/m2的手抄片;压榨的工作条件为:压力为0.5Mpa,时间为5min。
5.根据权利要求1所述的一种无氟防油包装纸的制备方法,其特征在于,以质量份数计,原纸的组成为:复合淀粉4-6份、碳酸钙10-12份、纸浆纤维78-84份。
6.根据权利要求1所述的一种无氟防油包装纸的制备方法,其特征在于,复合淀粉的制备包括以下步骤:
1)将玉米淀粉、去离子水混合,在90-95℃保温1-2h,制得玉米淀粉糊液;
2)将十八烷基胺、盐酸、去离子水混合,在90-95℃保温30min,得到十八烷基胺盐溶液;将冰乙酸、去离子水、棕榈酸混合,加热至90℃保温20-30min,得到棕榈酸盐溶液;
3)将十八烷基胺盐溶液与玉米淀粉糊液混合,升温至95℃保温20-30min,加入棕榈酸与玉米淀粉糊液混合液,自然冷却,冷冻干燥,得到复合淀粉。
7.根据权利要求1所述的一种无氟防油包装纸的制备方法,其特征在于,金针菇多糖的制备包括以下步骤:
将金针菇粉、去离子水混合,75-80℃保温4-5h,离心,加入正丁醇与三氯甲烷的混合液,静置10min,离心,加入95%乙醇溶液沉淀,过滤,用截留分子质量4kDa的透析袋透析,冷冻干燥,得到金针菇多糖。
8.根据权利要求1所述的一种无氟防油包装纸的制备方法,其特征在于,防油涂料中大豆分离蛋白、复合淀粉、金针菇多糖的质量比为1:2:1;复合氧化锌与大豆分离蛋白的质量比为2-3%。
9.根据权利要求1所述的一种无氟防油包装纸的制备方法,其特征在于,复合氧化锌的制备包括以下步骤:
(1)将六水合硝酸锌、六水合硝酸钴、甲醇混合,加入二甲基咪唑与甲醇的混合液,在55-60℃保温20-30min,然后在18-30℃保温22-24h,离心,用甲醇洗涤3-5次,干燥,得到金属基有机框架;
(2)将金属基有机框架升温至340℃煅烧1h,用硫代乙酰胺作为硫源,对煅烧后的金属基有机框架进行100℃回流硫化,升温至380℃煅烧1h,得到复合氧化锌。
10.一种无氟防油包装纸,其特征在于,根据权利要求1-9中任一项所述制备方法制备得到。
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