抗紫外线透明纸的制备及应用  

Preparation and Application of UV-Resistant Cellulose Transparent Paper

作　　者：管延华 闫莉 韩孝琴 张海峡 司传领[1] 戴林 GUAN Yanhua;YAN Li;HAN Xiaoqin;ZHANG Haixia;SI Chuanling;DAI Lin(State Key Laboratory of Biobased Fiber Manufacturing Technology,Tianjin Key Laboratory of Pulp and Paper,College of Light Industry and Engineering,Tianjin University of Science and Technology,Tianjin 300457,China;Wuzhou Special Paper Group Co.,Ltd.,Quzhou 324000,China)

机构地区：[1]天津科技大学轻工科学与工程学院,生物源纤维制造技术国家重点实验室,天津市制浆造纸重点实验室,天津300457 [2]五洲特种纸业集团股份有限公司,浙江衢州324000

出　　处：《生物质化学工程》2024年第5期28-36,共9页Biomass Chemical Engineering

基　　金：国家自然科学基金面上项目(32171717)。

摘　　要：本研究以硫酸盐针叶木浆抄造的纸为基材,通过浸渍法将单宁酸(TA)和羧甲基纤维素钠(CMC-Na)填充到基材的孔隙中制备高透光率、高雾度的抗紫外线透明纸,并对抗紫外线透明纸的结构与性质进行了全面分析,实验探究了纸基定量、CMC-Na添加量对透明纸透明度和雾度的影响,TA的添加量对透明纸透明度和紫外屏蔽效率的影响以及透明纸的透明度和雾度产生机理。研究结果表明:纸张的透明度和雾度主要受孔径和纤维素结晶区交替排列的影响。CMC-Na浸渍可以提高透明纸的透明度,减少雾度,当纸、CMC-Na和TA的加入量的比例为1∶1.39∶0.07时,透明纸的透明度和紫外线阻隔性能分别达到87.2%(600 nm)和92.9%(320 nm),而雾度保持在71.5%(600 nm)。抗紫外线透明纸具有优异的抗老化能力(365 nm紫外灯,光照强度18.52 W/m^(2)下照射100 h)和优异的力学性能(71.49 MPa),通过乙酸质子交换(10 min)和乙醇脱盐(10 min)的简易工艺,显著提高了材料的水接触角(78.7°),质子化处理改变了材料表面的化学特性,而脱盐工艺则清除了表面杂质,这种双重处理方法有效提升了材料在潮湿环境中的耐水能力。Using sulfate softwood pulp paper as the substrate,high transparency and high haze UV-resistant transparent paper was prepared by filling tannic acid(TA)and sodium carboxymethyl cellulose(CMC-Na)into the pores of the substrate through an impregnation method.The structure and properties of the UV-resistant transparent paper were comprehensively analyzed,exploring the effects of the quantitative amount of the paper substrate and the addition of CMC-Na on the transparency and haze of the transparent paper,as well as the effect of TA addition on the transparency and UV shielding efficiency of the transparent paper.The mechanisms behind the transparency and haze generation of the transparent paper were also investigated.The results showed that the transparency and haze of the paper were mainly affected by pore size and the alternating arrangement of cellulose crystalline zones.CMC-Na impregnation could improve transparency and reduce haze.When the ratio of paper,CMC-Na,and TA was 1∶1.39∶0.07,the transparency and UV-blocking performance of the transparent paper reached 87.2%(600 nm)and 92.9%(320 nm),respectively,while the haze remained at 71.5%(600 nm).The UV-resistant transparent paper exhibited excellent aging resistance(exposed to a 365 nm UV lamp with a light intensity of 18.52 W/m^(2)for 100 h)and outstanding mechanical properties(71.49 MPa).Through a simple process of acetic acid proton exchange(10 min)and ethanol desalination(10 min),the water contact angle of the material significantly increased(78.7°).The protonation treatment altered the chemical properties of the material's surface,while the desalination process removed surface impurities.This dual treatment method effectively enhanced the material's water resistance in humid environments.

关 键 词：纤维素 透明纸 雾度 抗紫外线 透光率 

分 类 号：TQ35[化学工程]