用于纸质文档保护的原位静电纺废旧聚对苯二甲酸乙二醇酯膜  

In-situ electrospun membranes from recycled polyethylene terephthalate for conservation of paper documents

作　　者：孟鑫 朱淑芳 徐英俊 闫旭 MENG Xin;ZHU Shufang;XU Yingjun;YAN Xu(College of Textiles&Clothing,Qingdao University,Qingdao,Shandong266071,China;State Key Laboratory of Bio-Fibers and Eco-Textiles,Qingdao University,Qingdao,Shandong266071,China)

机构地区：[1]青岛大学纺织服装学院,山东青岛266071 [2]青岛大学省部共建生物多糖纤维成形与生态纺织国家重点实验室,山东青岛266071

出　　处：《纺织学报》2023年第9期20-26,共7页Journal of Textile Research

基　　金：中国博士后科学基金项目(2020M671998);生物多糖纤维成形与生态纺织国家重点实验室自主课题项目(ZKT35);山东省重大科技创新工程项目(2019JZZY020220)。

摘　　要：针对纸质文档易受潮、易撕裂、易老化等保护难题,以回收废旧聚对苯二甲酸乙二醇酯(rPET)为原料,通过原位静电纺丝工艺将rPET纳米纤维直接沉积到纸质文档表面形成纤维保护膜。分析了原位静电纺处理前后纸质文档的形貌、表面润湿性、力学性能以及防紫外线性能。结果表明:制备的rPET纤维膜不会遮盖字迹,纤维膜的孔径为(5.53±0.38)μm,可阻挡常见灰尘和霉菌;最优条件下制备的rPET纤维膜可将纸质文档的水接触角提高到135.1°;沉积rPET纤维膜后纸质文档的拉伸强度和撕裂强度较未处理文档分别提高了129.1%和161.1%,紫外线防护系数可达到71.4。研究发现原位静电纺rPET纤维膜到纸质文档表面达到了较好的保护效果,该方法为矿泉水瓶的回收再利用及纸质文档保护提供了新途径。Objective Paper documents,such as old books,archives,and paper-based commemorative items are a rich source of human knowledge and passion.It is challengeable to protect paper documents from moisture,tear and aging.This paper proposes a straightforward and cost-effective approach for paper documents protection by in-situ electrospinning,which directly deposited as-spun nanofibrous membranes onto the paper documents surface.Method Used mineral water bottles which are transparent and hydrophobic were selected as the raw material(mainly polyethylene terephthalate,rPET)and were dissolved to form solutions with different concentrations.The rPET solution was electrospun into fibers under different spinning parameters,which were directly deposited onto the paper document surface to form a transparent protective membrane using a portable electrospinning device(Fig.1).The morphology,surface wettability,mechanical properties and UV resistance of the paper documents before and after in-situ electrospinning were analyzed to evaluate the protective effect of the membranes.Results The optimized spinning parameters were the rPET mass fraction of 8%,spinning distance of 15 cm,spinning time of 10 min,spinning voltage of 15 kV,and solution feeding rate of 10μL/min.Under these parameters,the prepared rPET fiber membrane was almost transparent without covering the prints on paper(Fig.2)but would block common dust and mold effectively due to the small membrane pore diameters of about(5.53±0.38)μm(Fig.3).The as-spun rPET nanofibrous membranes under optimal conditions made the paper′s surface hydrophobic with the water contact angle about 135.1°(Fig.4)to avoid water immersion.It was also found that the deposited rPET fibers could form an interlocking grid structure,increasing the tensile strength in the horizontal and vertical directions by 129.1%and 16.1%.Tear resistance was also improved in both transverse(86%)and longitudinal(161.1%)directions,respectively(Fig.6).The study also revealed that the as-spun rPET nanofibrous membran

关 键 词：原位静电纺丝 回收聚对苯二甲酸乙二醇酯 纳米纤维 纸质文档保护 覆膜 

分 类 号：TS179[轻工技术与工程—纺织材料与纺织品设计] TQ342[轻工技术与工程—纺织科学与工程]