CN112726206A - 一种抗紫外线聚乙烯无纺布及其制备方法 - Google Patents
一种抗紫外线聚乙烯无纺布及其制备方法 Download PDFInfo
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Abstract
本发明公开了一种抗紫外线聚乙烯无纺布，在聚乙烯无纺布表面依次粘附有聚多巴胺层和二氧化钛层。本发明还公开了上述抗紫外线聚乙烯无纺布的制备方法，包括如下步骤：S1、在多巴胺溶液中浸泡聚乙烯无纺布后，洗涤，干燥得到中间布料；S2、在二氧化钛分散液中浸泡中间布料后，洗涤，干燥得到抗紫外线聚乙烯无纺布。本发明具有良好的抗紫外线性能和抗菌性能，且机械性能良好。
Description
技术领域
本发明涉及无纺布技术领域，尤其涉及一种抗紫外线聚乙烯无纺布及其制备方法。
背景技术
聚乙烯(简称PE)是乙烯经聚合制得的一种热塑性树脂。聚乙烯无臭，无毒，手感似蜡，耐低温、化学稳定性好，易加工。常作为无纺布的原料，用于生产包装袋等产品；但是聚乙烯在紫外线作用下容易发生降解，限制其使用。
发明内容
基于背景技术存在的技术问题，本发明提出了一种抗紫外线聚乙烯无纺布及其制备方法，本发明具有良好的抗紫外线性能和抗菌性能，且机械性能良好。
本发明提出了一种抗紫外线聚乙烯无纺布，在聚乙烯无纺布表面依次粘附有聚多巴胺层和二氧化钛层。
优选地，二氧化钛为硅烷偶联剂改性二氧化钛。
优选地，硅烷偶联剂为含氨基硅烷偶联剂、含巯基硅烷偶联剂中的至少一种。
上述含氨基硅烷偶联剂可以为γ-氨丙基三乙氧基硅烷、N-β-(氨乙基)-γ-氨丙基三甲氧基硅烷等；含巯基硅烷偶联剂可以为3-巯丙基三甲氧基硅烷、3-巯丙基三乙氧基硅烷等。
优选地，所述聚乙烯无纺布的原料中含有二氧化钛和炭黑。
优选地，二氧化钛的含量为8-10wt％。
优选地，炭黑的含量为10-15wt％。
本发明还提出了上述抗紫外线聚乙烯无纺布的制备方法，包括如下步骤：
S1、在多巴胺溶液中浸泡聚乙烯无纺布后，洗涤，干燥得到中间布料；
S2、在二氧化钛分散液中浸泡中间布料后，洗涤，干燥得到抗紫外线聚乙烯无纺布。
上述聚乙烯无纺布需经清洗处理后，再浸泡在多巴胺溶液中。
优选地，在S1中，于室温浸泡36-48h。
优选地，在S2中，于40-50℃浸泡15-20h。
优选地，在S1中，多巴胺溶液的浓度为3-3.5mg/ml。
优选地，在S1中，多巴胺溶液的溶剂为pH为8-8.5的Tris-HCl缓冲液。
优选地，在S2中，二氧化钛分散液的质量分数为0.5-1.5wt％。
优选地，在S2中，二氧化钛分散液的溶剂为水。
有益效果：
本发明将聚乙烯无纺布浸泡在多巴胺溶液中，使得多巴胺粘附在聚乙烯无纺布表面，从而在聚乙烯表面引入邻苯二酚、胺基等活性基团；然后在硅烷偶联剂改性二氧化钛分散液中浸泡，硅烷偶联剂中的氨基、巯基与邻苯二酚、胺基等活性基团进行反应接枝，从而在聚乙烯无纺布表面接枝上了二氧化钛，且不易脱落；表面的二氧化钛和聚乙烯原料中的二氧化钛、炭黑相互配合，可以大幅提高本发明的抗紫外线性能，表面的二氧化钛还能提高本发明的抗菌性能，且本发明的操作温度温和，不会降低原聚乙烯无纺布的机械性能。
具体实施方式
下面，通过具体实施例对本发明的技术方案进行详细说明。
实施例1
一种抗紫外线聚乙烯无纺布，在聚乙烯无纺布表面依次粘附有聚多巴胺层和二氧化钛层；所述二氧化钛为γ-氨丙基三乙氧基硅烷改性二氧化钛；所述聚乙烯无纺布的原料中含有8wt％二氧化钛和15wt％炭黑。
上述抗紫外线聚乙烯无纺布的制备方法，包括如下步骤：
S1、用乙醇超声清洗聚乙烯无纺布(10cm×10cm，单位面积质量45g/m2)，然后用水清洗，于35℃烘干备用；
将清洗烘干后的聚乙烯无纺布加入500ml浓度为3mg/ml的多巴胺溶液中，于室温浸泡浸泡48h，然后取出用水冲洗后，于35℃烘干得到中间布料，其中，多巴胺溶液的溶剂为pH为8的Tris-HCl缓冲液；
S2、将中间布料加入500ml质量分数为1.5wt％的二氧化钛水分散液中，于40℃浸泡20h，然后取出用水冲洗后，于35℃烘干得到抗紫外线聚乙烯无纺布。
实施例2
一种抗紫外线聚乙烯无纺布，在聚乙烯无纺布表面依次粘附有聚多巴胺层和二氧化钛层；所述二氧化钛为3-巯丙基三乙氧基硅烷改性二氧化钛；所述聚乙烯无纺布的原料中含有10wt％二氧化钛和10wt％炭黑。
上述抗紫外线聚乙烯无纺布的制备方法，包括如下步骤：
S1、用乙醇超声清洗聚乙烯无纺布(10cm×10cm，单位面积质量45g/m2)，然后用水清洗，于35℃烘干备用；
将清洗烘干后的聚乙烯无纺布加入500ml浓度为3.5mg/ml的多巴胺溶液中，于室温浸泡浸泡36h，然后取出用水冲洗后，于35℃烘干得到中间布料，其中，多巴胺溶液的溶剂为pH为8.5的Tris-HCl缓冲液；
S2、将中间布料加入500ml质量分数为0.5wt％的二氧化钛水分散液中，于50℃浸泡15h，然后取出用水冲洗后，于35℃烘干得到抗紫外线聚乙烯无纺布。
实施例3
一种抗紫外线聚乙烯无纺布，在聚乙烯无纺布表面依次粘附有聚多巴胺层和二氧化钛层；所述二氧化钛为γ-氨丙基三乙氧基硅烷改性二氧化钛；所述聚乙烯无纺布的原料中含有9wt％二氧化钛和12wt％炭黑。
上述抗紫外线聚乙烯无纺布的制备方法，包括如下步骤：
S1、用乙醇超声清洗聚乙烯无纺布(10cm×10cm，单位面积质量45g/m2)，然后用水清洗，于35℃烘干备用；
将清洗烘干后的聚乙烯无纺布加入500ml浓度为3.2mg/ml的多巴胺溶液中，于室温浸泡浸泡42h，然后取出用水冲洗后，于35℃烘干得到中间布料，其中，多巴胺溶液的溶剂为pH为8.2的Tris-HCl缓冲液；
S2、将中间布料加入500ml质量分数为1wt％的二氧化钛水分散液中，于45℃浸泡17h，然后取出用水冲洗后，于35℃烘干得到抗紫外线聚乙烯无纺布。
实验
取实施例1-3中经多巴胺和二氧化钛处理前后的聚乙烯无纺布，进行抗紫外线性能和机械性能检测，结果如表1所示。
a.按照GB/T18830-2009测定紫外防护系数(UPF)和紫外线透过率。
b.按照GB/T24218.3-2010测试其断裂强力。
表1检测结果
由上表可以看出，本发明具有良好的抗紫外线性能，且机械性能与处理前无明显变化。
以上所述，仅为本发明较佳的具体实施方式，但本发明的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本发明揭露的技术范围内，根据本发明的技术方案及其发明构思加以等同替换或改变，都应涵盖在本发明的保护范围之内。
Claims (10)
1.一种抗紫外线聚乙烯无纺布，其特征在于，在聚乙烯无纺布表面依次粘附有聚多巴胺层和二氧化钛层。
2.根据权利要求1所述抗紫外线聚乙烯无纺布，其特征在于，二氧化钛为硅烷偶联剂改性二氧化钛；硅烷偶联剂为含氨基硅烷偶联剂、含巯基硅烷偶联剂中的至少一种。
3.根据权利要求2所述抗紫外线聚乙烯无纺布，其特征在于，所述聚乙烯无纺布的原料中含有二氧化钛和炭黑；优选地，二氧化钛的含量为8-10wt％；优选地，炭黑的含量为10-15wt％。
4.一种如权利要求1-3任一项所述抗紫外线聚乙烯无纺布的制备方法，其特征在于，包括如下步骤：
S1、在多巴胺溶液中浸泡聚乙烯无纺布后，洗涤，干燥得到中间布料；
S2、在二氧化钛分散液中浸泡中间布料后，洗涤，干燥得到抗紫外线聚乙烯无纺布。
5.根据权利要求4所述抗紫外线聚乙烯无纺布的制备方法，其特征在于，在S1中，于室温浸泡36-48h。
6.根据权利要求4或5所述抗紫外线聚乙烯无纺布的制备方法，其特征在于，在S2中，于40-50℃浸泡15-20h。
7.根据权利要求4-6任一项所述抗紫外线聚乙烯无纺布的制备方法，其特征在于，在S1中，多巴胺溶液的浓度为3-3.5mg/ml。
8.根据权利要求4-7任一项所述抗紫外线聚乙烯无纺布的制备方法，其特征在于，在S1中，多巴胺溶液的溶剂为pH为8-8.5的Tris-HCl缓冲液。
9.根据权利要求4-8任一项所述抗紫外线聚乙烯无纺布的制备方法，其特征在于，在S2中，二氧化钛分散液的质量分数为0.5-1.5wt％。
10.根据权利要求4-9任一项所述抗紫外线聚乙烯无纺布的制备方法，其特征在于，在S2中，二氧化钛分散液的溶剂为水。
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