CN116289312A - 一种生物基表面施胶剂及其制备方法 - Google Patents
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Abstract
一种生物基表面施胶剂，其特征在于，其组成包括如下重量份数的组分：1份半纤维素、0.1‑0.2份扩链剂、0.05‑0.2份交联剂、0.1‑0.2份疏水性小分子、0.015‑0.05份聚乙烯醇、0.2‑0.5份异氰酸酯和1.5‑5份水。本发明中的表面施胶助剂抗水性能好，能有效提高瓦楞原纸的环压强度。
Description
技术领域
本发明属于施胶助剂领域，具体涉及一种生物基表面施胶剂及其制备方法。
背景技术
表面施胶剂是造纸工业的重要助剂，通过与纸张表面纤维吸附或键合形成疏水薄膜，提高纸张的抗液性能和表面强度，合成表面施胶剂类水性聚氨酯(WPU)因成膜性能好、黏结强度高、柔韧性可调、绿色环保被认为是造纸工业最具应用前景的表面施胶剂之一。尽管WPU表面施胶剂具有众多优点，但由于其以水为分散介质，不可避免地会在WPU分子中引入亲水基团，导致其耐水、耐热以及机械强度等性能低于其他合成表面施胶剂。
本文旨在解决上述施胶剂存在的问题，用生物质分子结合成膜性较好的合成高分子PVA本身的优点，结合天然高分子对纸页的增强作用，制备一种抗水性能强，可有效提高瓦楞原纸的环压强度的表面施胶助剂。
发明内容
本发明所要解决的技术问题是为了克服现有技术中聚氨酯为主要原料的表面施胶助剂抗水性差，环压强度低的问题。
本发明采用以下技术方案解决上述技术问题：
一种生物基表面施胶剂，其组成包括如下重量份数的组分：1份半纤维素、0.1-0.2份扩链剂、0.05-0.2份交联剂、0.1-0.2份疏水性小分子、0.015-0.05份聚乙烯醇(PVA)、0.2-0.5份异氰酸酯和1.5-5份水。
优选地，所述半纤维素的数均分子量为2-5万，较优地为2万。
优选地，所述扩链剂包括1,4-丁二醇、1,6-己二醇、甘油、三羟甲基丙烷、二甘醇(DEG)、三甘醇、新戊二醇(NPG)、山梨醇中的一种或多种。
优选地，所述交联剂包括硼酸、硼砂、戊二醛、乙二醛、三羟甲基丙烷、三羟甲基乙烷、聚丙二醇缩水甘油醚中的一种或多种。
优选地，所述疏水性小分子包括丙烯酸酯甲酯、丙烯酸乙酯、2-甲基丙烯酸甲酯、丙烯酸丁酯中的一种或多种。
优选地，所述异氰酸酯包括芳香族多异氰酸酯、脂肪族多异氰酸酯、脂环族多异氰酸酯的一种或多种。
更优选地，所述异氰酸酯包括甲苯二异氰酸酯、二苯基甲烷二异氰酸酯、二环已基甲烷二异氰酸酯中的一种或多种。
一种生物基表面施胶剂的制备方法，具体包括下述步骤：
(1)将半纤维素加入适量的水，开启搅拌，加入扩链剂，升至一定温度，保温一定时间；
(2)将聚乙烯醇少量多次加入到其余的水中，升温至一定温度，保温一定时间，直至溶解；
(3)将步骤(1)和(2)所得样品混合均匀，加入交联剂、疏水性小分子和异氰酸酯，在一定温度下保温一定时间，即得所述生物质表面施胶剂。
优选地，所述步骤(1)中，所述温度为60-80℃，保温时间为20-40min。
优选地，所述步骤(1)中，所述水的加入量为半纤维素的2-4倍。
优选地，所述步骤(2)中，所述温度为80-95℃，保温时间为60-90min。
优选地，所述步骤(3)中，所述温度为60-70℃，保温时间为60-120min。
本发明中的表面施胶助剂抗水性能好，能有效提高瓦楞原纸的环压强度。本发明提供一种生物质分子，该分子对纸页具有很好的增强作用，同时结合成膜性较好的合成高分子PVA，制备一种抗水性能强，可有效提高瓦楞原纸的环压强度的表面施胶助剂。
具体实施方式
结合下面实施例对本发明进行进一步的阐述，但本发明的保护范围并不限于此。针对实施例给出说明：以下实施例所用原料不对本申请所需原料进行限制，仅用于实施例撰写。
实施例1
一种生物基表面施胶剂的制备方法，具体包括下述步骤：
(1)将50g半纤维素(分子量2万)加入200g水，开启搅拌，加入5g1,4-丁二醇，升至60℃，保温30min；
(2)将0.75g聚乙烯醇1788少量多次加入50g水中，升温至90℃，保温60min，直至溶解；
(3)将步骤(1)和(2)中的样品混合均匀，加入2.5g10％的硼砂溶液、5g丙烯酸甲酯和10g甲苯二异氰酸酯，在60℃下保温60min，即得生物质表面施胶剂。
实施例2
一种生物基表面施胶剂的制备方法，具体包括下述步骤：
(1)将50g半纤维素(分子量2万)加入100g水，开启搅拌，加入7.5g三羟甲基丙烷，升至80℃，保温40min；
(2)将1g聚乙烯醇2488少量多次加入100g水中，升温至95℃，保温60min，直至溶解；
(3)将步骤(1)和(2)中的样品混合均匀，加入5g乙二醛、7.5g2-甲基丙烯酸甲酯和10g二苯基甲烷二异氰酸酯，在70℃保温60min，即得生物质表面施胶剂。
实施例3
一种生物基表面施胶剂的制备方法，具体包括下述步骤：
(1)将50g半纤维素(分子量2万)加入150g水，开启搅拌，加入10g甘油，升至80℃，保温30min；
(2)将2.5g聚乙烯醇2488少量多次加入100g水中，升温至95℃，保温90min，直至溶解；
(3)将步骤(1)和(2)中的样品混合均匀，加入10g聚丙二醇缩水甘油醚、10g2-甲基丙烯酸甲酯和20g二苯基甲烷二异氰酸酯在60℃，保温120min，即得生物质表面施胶助剂。
实施例4
一种生物基表面施胶剂的制备方法，具体包括下述步骤：
(1)将50g半纤维素(分子量2万)加入100g水，开启搅拌，加入5g三甘醇，升至60℃，保温40min；
(2)将2.5g聚乙烯醇1788少量多次加入150g水中，升温至90℃，保温1h，直至溶解；
(3)将步骤(1)和(2)中的样品混合均匀，加入5g戊二醛、5g丙烯酸丁酯和10g二环已基甲烷二异氰酸酯，在60℃下，保温120min，即得生物质表面施胶助剂；
对比例1
与实施例1相比，不加半纤维素。
对比例2
与实施例1相比，不加PVA。
对比例3
与实施例1相比，不加丙烯酸甲酯。
对比例4
与实施例1相比，不加甲苯二异氰酸酯。
实施效果：
施胶液的配制：配制500克10wt％氧化淀粉水溶液，升温至90℃，糊化20分钟，降温至40℃，再加入对比例与实施例1～4配方制备的施胶剂(氧化淀粉(干)：施胶剂(湿)＝50：4)，再加水稀释至8wt％。
在瓦楞纸上表面施胶：使用上述实施例和对比例制得的施胶剂助剂配置成的施胶液在120g瓦楞原纸上用10#涂布棒进行涂布，涂布量为2g/m2，涂布后分别在110℃烘箱中烘30s，取出，冷却至室温进行测定，测定结果见表1所示。
其中，Cobb值的测定采用杭州轻通博科自动化技术有限公司的XSH型可勃吸收性测定仪按GB/T1540-1989方法检测待测纸样。环压强度的测定采用杭州轻通博科自动化技术有限公司的CT300A压缩强度测试仪检测待测纸样。Cobb值越小越好，环压指数越大越好。
表1实施例和对比例的施胶性能
从表1可以看出，实施例1-4制的的表面施胶助剂与对比例1-4相比，可有效提高瓦楞原纸的耐吸水性和环压指数。
以上显示和描述了本发明的基本原理、主要特征及本发明的优点。本行业的技术人员应该了解，本发明不受上述实施例的限制，上述实施例和说明书中描述的只是说明本发明的原理，在不脱离本发明精神和范围的前提下，本发明还会有各种变化和改进，这些变化和改进都落入要求保护的本发明范围内。本发明要求保护的范围由所附的权利要求书及其等效物界定。
Claims (9)
1.一种生物基表面施胶剂，其特征在于，其组成包括如下重量份数的组分：1份半纤维素、0.1-0.2份扩链剂、0.05-0.2份交联剂、0.1-0.2份疏水性小分子、0.015-0.05份聚乙烯醇、0.2-0.5份异氰酸酯和1.5-5份水。
2.如权利要求1所述的一种生物基表面施胶剂，其特征在于，所述半纤维素的数均分子量为2-5万。
3.如权利要求1所述的一种生物基表面施胶剂，其特征在于，所述扩链剂包括1,4-丁二醇、1,6-己二醇、甘油、三羟甲基丙烷、二甘醇(DEG)、三甘醇、新戊二醇(NPG)、山梨醇中的一种或多种。
4.如权利要求1所述的一种生物基表面施胶剂，其特征在于，所述交联剂包括硼酸、硼砂、戊二醛、乙二醛、三羟甲基丙烷、三羟甲基乙烷、聚丙二醇缩水甘油醚中的一种或多种。
5.如权利要求1所述的一种生物基表面施胶剂，其特征在于，所述疏水性小分子包括丙烯酸酯甲酯、丙烯酸乙酯、2-甲基丙烯酸甲酯、丙烯酸丁酯中的一种或多种。
6.如权利要求1所述的一种生物基表面施胶剂，其特征在于，所述异氰酸酯包括芳香族多异氰酸酯、脂肪族多异氰酸酯、脂环族多异氰酸酯的一种或多种。
7.如权利要求6所述的一种生物基表面施胶剂，其特征在于，所述异氰酸酯包括甲苯二异氰酸酯、二苯基甲烷二异氰酸酯、二环已基甲烷二异氰酸酯中的一种或多种。
8.如权利要求1-7任一项所述的一种生物基表面施胶剂的制备方法，其特征在于，具体包括下述步骤：
(1)将半纤维素加入适量的水，开启搅拌，加入扩链剂，升至一定温度，保温一定时间；
(2)将聚乙烯醇少量多次加入到其余的水中，升温至一定温度，保温一定时间，直至溶解；
(3)将步骤(1)和(2)所得样品混合均匀，加入交联剂、疏水性小分子和异氰酸酯，在一定温度下保温一定时间，即得所述生物质表面施胶剂。
9.如权利要求8所述的一种生物基表面施胶剂的制备方法，其特征在于：所述步骤(1)中，所述温度为60-80℃，保温时间为20-40min；
所述步骤(1)中，所述水的加入量为半纤维素的2-4倍；
所述步骤(2)中，所述温度为80-95℃，保温时间为60-90min；
所述步骤(3)中，所述温度为60-70℃，保温时间为60-120min。
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