CN106801363A - 一种聚乳酸增强薄膜防水耐热性能的复合型可降解防水纸 - Google Patents

一种聚乳酸增强薄膜防水耐热性能的复合型可降解防水纸 Download PDF

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CN106801363A
CN106801363A CN201611252120.6A CN201611252120A CN106801363A CN 106801363 A CN106801363 A CN 106801363A CN 201611252120 A CN201611252120 A CN 201611252120A CN 106801363 A CN106801363 A CN 106801363A
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李宗飞
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Abstract

本发明公开了一种聚乳酸增强薄膜防水耐热性能的复合型可降解防水纸，将聚乳酸溶解在氯仿中形成聚乳酸溶液，通过聚己内酯的增塑作用，增强聚乳酸的韧性以及耐温性，对产品进行浸渍后的涂布，可以进一步增强纸张的防水性以及抗张强度，同时耐热性能得到了很大的提高了；本发明采用二次覆膜的方式得到了防水性能、抗张强度极佳的防水纸，同时由于聚乳酸的涂布，增强了产品的耐热性，使得产品可用于一次性包装用品、广告牌等产品的制造，使用范围广，可生物降解，不会对环境造成负担。

Description

一种聚乳酸增强薄膜防水耐热性能的复合型可降解防水纸
技术领域
本发明涉及造纸技术领域，尤其涉及一种聚乳酸增强薄膜防水耐热性能的复合型可降解防水纸。
背景技术
纸张纤维具有很强的亲水性，一般情况下未经过处理的纸页经水浸泡后，大部分纤维强度会失去，甚至直接破碎。为了满足人们生活需求和现代工业技术的发展需要，纸的应用领域越来越大。防水纸在产品包装、食品包装等领域应用广泛，随着环保意识的日益增强，人们对于环保型可降解的防水纸需求越来越强烈。
《高效能低成本湿强剂的合成及其在防水原纸中的应用》一文中研究了高效能低成本聚酰胺聚胺环氧氯丙烷湿强剂PAE树脂的合成工艺及其在防水原纸中的使用情况及成纸质量，该树脂对纸张的增湿强效果明显，是一种优良的湿强剂，用其制成的防水纸具有良好的湿强度，从而使得防水纸的质量得以提高，防水性能增强。文章中防水原纸主要是由纤维素制备而来的，即使掺加湿强剂、施胶剂等特定的添加剂，其本身的可生物降解性依然很突出，在特定条件下，经过一定时间，防水纸仍然可以完全降解，但是其防水效果具有一定的局限性，目前市场上有 PP 防水纸，采用某种特殊工艺使PP包覆在纸张表面，使纸张具有良好的防水性能，由于PP为石化产品，其稳定性较高，很难生物降解，对环境造成了危害。这就需要我们在增强纸张施强效果的同时在成型纸张表面涂覆一层防水效果好且具有可生物降解功效的防水膜，提高防水纸的性能，同时在纸张成型前加入不同功能型成分，使可生物降解防水纸具有其他的附加价值，提高市场竞争力。
发明内容
本发明目的就是为了弥补已有技术的缺陷，提供一种聚乳酸增强薄膜防水耐热性能的复合型可降解防水纸。
本发明是通过以下技术方案实现的：
一种聚乳酸增强薄膜防水耐热性能的复合型可降解防水纸，由下列重量份的原料制备制成：PAE树脂1.5-1.6、聚丙烯酰胺1.5-1.7、烷基烯酮二聚体0.2-0.25、漂白针叶木浆38-40、绒毛浆28-30、竹浆31-33、云母粉4-5、轻质碳酸钙12-13、蒸馏水适量、魔芋葡甘聚糖1.8-1.9、浓缩乳清蛋白4.2-4.5、蜂蜡4-4.5、甘油0.1-0.12、吐温800.08-0.1、聚乳酸粉末4-5、聚己内酯0.45-0.5、氯仿85-87、无水乙醇9-9.5。
所述一种聚乳酸增强薄膜防水耐热性能的复合型可降解防水纸，由以下具体步骤制成：
（1）将漂白针叶木浆、绒毛浆、竹浆混合，加入打浆机中，然后加入PAE树脂、聚丙烯酰胺、烷基烯酮二聚体以及适量蒸馏水进行打浆，控制纸浆浓度为3.9-4.2%，打浆度在38-400SR，制得浆料；
（2）将魔芋葡甘聚糖溶于10-12倍量的蒸馏水，加热至80-90℃，搅拌30-40分钟后将溶液冷却至室温待用；将浓缩乳清蛋白溶于10-12倍量的蒸馏水中，搅拌至成分溶解后与上述溶液混合，加入甘油、吐温80，加热至75-80℃，搅拌60-80分钟后加入蜂蜡，在高速搅拌器下以1000-1200转/分的速度搅拌50-60分钟，得到浸渍液；
（3）将聚乳酸粉末加入氯仿与无水乙醇的混合溶液中，搅拌分散均匀后加入聚己内酯，水浴加热至450-50℃，以600-800转/分的速度搅拌反应4-4.5小时后静置20-24小时，得到聚乳酸溶液；
（4）将其余剩余成分加入到步骤（1）得到的浆料中，搅拌均匀后通过造纸机内的网部脱水以及压榨成型，然后通过干燥腔干燥制成纸张，再通过压光热压机将纸张挤压，将纸张浸渍在步骤（2）得到的浸渍液中30-40秒，取出后在50-55℃下干燥18-24小时，最后将其放入涂布机中，利用步骤（3）得到的聚乳酸溶液进行表涂布，最后在常温挥发24-36小时后即得。
本发明的优点是：本发明首先将PAE树脂、烷基烯酮二聚体等复配，添加到纸浆的制备中，能够提高了纸浆纤维与纤维之间的结合强度，在纤维界面上形成网络状的交联结构，限制纤维之间的活动，阻碍纤维吸水润胀，降低尺寸变化，因此提高了纸的湿强度，同时复配成分分散溶解于浆料中，渗透至纤维的表面和内部，缩聚形成高分子聚合物，进一步提高了纸张的强度；通过浓缩乳清蛋白与蜂蜡的共同作用改性了魔芋葡甘聚糖，制得浸渍液通过对原纸进行浸渍，干燥后能够在纸张表面形成一层可降解的薄膜，具有良好的疏水防水性能，同时具有良好的力学性能，拉伸强度与断裂伸长率优异，进一步提高了纸张的强度，制成的产品可生物降解，防水性能优异，安全无毒。
本发明将聚乳酸溶解在氯仿中形成聚乳酸溶液，通过聚己内酯的增塑作用，增强聚乳酸的韧性以及耐温性，对产品进行浸渍后的涂布，可以进一步增强纸张的防水性以及抗张强度，同时耐热性能得到了很大的提高了；本发明采用二次覆膜的方式得到了防水性能、抗张强度极佳的防水纸，同时由于聚乳酸的涂布，增强了产品的耐热性，使得产品可用于一次性包装用品、广告牌等产品的制造，使用范围广，可生物降解，不会对环境造成负担。
具体实施方式
一种聚乳酸增强薄膜防水耐热性能的复合型可降解防水纸，由下列重量份（公斤）的原料制备制成：PAE树脂1.5、聚丙烯酰胺1.5、烷基烯酮二聚体0.2、漂白针叶木浆38、绒毛浆28、竹浆31、云母粉4、轻质碳酸钙12、蒸馏水适量、魔芋葡甘聚糖1.8、浓缩乳清蛋白4.2、蜂蜡4、甘油0.1、吐温800.08、聚乳酸粉末4、聚己内酯0.45、氯仿85、无水乙醇9。
所述一种聚乳酸增强薄膜防水耐热性能的复合型可降解防水纸，由以下具体步骤制成：
（1）将漂白针叶木浆、绒毛浆、竹浆混合，加入打浆机中，然后加入PAE树脂、聚丙烯酰胺、烷基烯酮二聚体以及适量蒸馏水进行打浆，控制纸浆浓度为3.9%，打浆度在38SR，制得浆料；
（2）将魔芋葡甘聚糖溶于10倍量的蒸馏水，加热至80℃，搅拌30分钟后将溶液冷却至室温待用；将浓缩乳清蛋白溶于10倍量的蒸馏水中，搅拌至成分溶解后与上述溶液混合，加入甘油、吐温80，加热至75℃，搅拌60分钟后加入蜂蜡，在高速搅拌器下以1000转/分的速度搅拌50分钟，得到浸渍液；
（3）将聚乳酸粉末加入氯仿与无水乙醇的混合溶液中，搅拌分散均匀后加入聚己内酯，水浴加热至450℃，以600转/分的速度搅拌反应4小时后静置20小时，得到聚乳酸溶液；
（4）将其余剩余成分加入到步骤（1）得到的浆料中，搅拌均匀后通过造纸机内的网部脱水以及压榨成型，然后通过干燥腔干燥制成纸张，再通过压光热压机将纸张挤压，将纸张浸渍在步骤（2）得到的浸渍液中30秒，取出后在50℃下干燥18小时，最后将其放入涂布机中，利用步骤（3）得到的聚乳酸溶液进行表涂布，最后在常温挥发24小时后即得。
经检测，本发明制得的可降解防水纸的纵向抗张强度为2.27KN/m。

Claims (2)

1.一种聚乳酸增强薄膜防水耐热性能的复合型可降解防水纸，其特征在于，由下列重量份的原料制备制成：PAE树脂1.5-1.6、聚丙烯酰胺1.5-1.7、烷基烯酮二聚体0.2-0.25、漂白针叶木浆38-40、绒毛浆28-30、竹浆31-33、云母粉4-5、轻质碳酸钙12-13、蒸馏水适量、魔芋葡甘聚糖1.8-1.9、浓缩乳清蛋白4.2-4.5、蜂蜡4-4.5、甘油0.1-0.12、吐温800.08-0.1、聚乳酸粉末4-5、聚己内酯0.45-0.5、氯仿85-87、无水乙醇9-9.5。
2.根据权利要求1所述一种聚乳酸增强薄膜防水耐热性能的复合型可降解防水纸，其特征在于，由以下具体步骤制成：
（1）将漂白针叶木浆、绒毛浆、竹浆混合，加入打浆机中，然后加入PAE树脂、聚丙烯酰胺、烷基烯酮二聚体以及适量蒸馏水进行打浆，控制纸浆浓度为3.9-4.2%，打浆度在38-400SR，制得浆料；
（2）将魔芋葡甘聚糖溶于10-12倍量的蒸馏水，加热至80-90℃，搅拌30-40分钟后将溶液冷却至室温待用；将浓缩乳清蛋白溶于10-12倍量的蒸馏水中，搅拌至成分溶解后与上述溶液混合，加入甘油、吐温80，加热至75-80℃，搅拌60-80分钟后加入蜂蜡，在高速搅拌器下以1000-1200转/分的速度搅拌50-60分钟，得到浸渍液；
（3）将聚乳酸粉末加入氯仿与无水乙醇的混合溶液中，搅拌分散均匀后加入聚己内酯，水浴加热至450-50℃，以600-800转/分的速度搅拌反应4-4.5小时后静置20-24小时，得到聚乳酸溶液；
（4）将其余剩余成分加入到步骤（1）得到的浆料中，搅拌均匀后通过造纸机内的网部脱水以及压榨成型，然后通过干燥腔干燥制成纸张，再通过压光热压机将纸张挤压，将纸张浸渍在步骤（2）得到的浸渍液中30-40秒，取出后在50-55℃下干燥18-24小时，最后将其放入涂布机中，利用步骤（3）得到的聚乳酸溶液进行表涂布，最后在常温挥发24-36小时后即得。
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