PET薄膜的亲水改性研究  

Hydrophilic Modification of PET Film

作　　者：丁蕊蕊 潘均安 阳范文 苏昊橼 陈志琪 卓志宁 丁华畅 郑皙月 周馨怡 冯泳婷 DING Rui-rui;PAN Jun-an;YANG Fan-wen;SU Hao-yuan;CHEN Zhi-qi;ZHUO Zhi-ning;DING Hua-chang;ZHENG Xi-yue;ZHOU Xin-yi;FENG Yong-ting(Department of Biomedical Engineering,Basic Medical School,Guangzhou Medical University,Guangzhou 511436,China)

机构地区：[1]广州医科大学基础医学院生物医学工程系,广州511436

出　　处：《表面技术》2023年第4期374-380,共7页Surface Technology

基　　金：2022年度广东省攀登计划项目(pdjh2022b0424);2020年度广医大-睿康医疗公司联合研究项目(J20172011)。

摘　　要：目的 探索对聚对苯二甲酸乙二醇酯(PET)薄膜亲水改性的制备工艺,研究其是否能有效提高PET薄膜表面的亲水性。方法 将PET薄膜裁剪成1 cm×4 cm的矩形样条,样条放入盛有无水乙醇的离心管中超声清洗,经烘干后再放入叔丁基过氧化氢(TBHP)溶液中进行引发反应,引发完成的PET薄膜样条依次用无水乙醇、水超声清洗后放入PVP溶液进行改性,最后超声清洗并烘干放置24 h进行接触角测试与红外光谱测试,分别评价PET薄膜的亲水性与表面成分变化。结果 使用不同PVP进行改性,PVP-K90对PET薄膜的改性效果最佳,接触角下降最明显,其接触角为21.3°。研究不同浓度TBHP对接触角的影响,随着TBHP浓度增加,接触角逐渐减小,TBHP浓度为1%时,其接触角为28°。探究不同浓度PVP-K90对接触角的影响,随着PVP-K90浓度增加,接触角呈现先减小后略有增大的变化趋势,PVP-K90浓度为5%时达到最小值(24.2°)。最佳配方和工艺为:5%PVP-K90+1%TBHP,温度80℃,转速600 r/min,反应时间1 h。PET薄膜的接触角从改性前的81.7°下降到改性后的29.5°,亲水性显著提高。亲水改性PET薄膜超声清洗20 min以上,接触角仍保持不变,红外光谱在3 427、1 608 cm^(-1)的特征峰明显增强,PVP以化学键合方式接枝在PET表面。结论 以TBHP作引发剂,PVP-K90作改性剂,通过表面接枝方法可有效提高PET薄膜的亲水性。It is a hydrophilic modification method with simple process,good effect and cleaning resistance,which can effectively improve the hydrophilicity of the surface of the polyethylene glycol terephthalate(PET)film.Due to the defects of the existing PET hydrophilic modification methods,such as high equipment cost,complicated operation,this paper studies the use of polyvinyl pyrrolidone(PVP)as modifier and tert-butyl hydroperoxide(TBHP)as initiator for the shortcomings of the existing methods,the hydrophilicity of the PET film is significantly improved by grafting.Cut the PET film into a 1 cm×4 cm rectangle spline,put the spline into a centrifuge tube filled with absolute ethanol,clean it with an ultrasonic cleaner(SB-5200DTDN),and dry it in a vacuum drying oven(DHG-9075A).Put it into TBHP solution to initiate the reaction.The PET film strips that have been initiated are sequentially cleaned with absolute ethanol and water ultrasonically,and then put into PVP solution for modification.Finally,ultrasonically cleaned and dried for 24 hours using a contact angle measuring instrument(JC2000D1)and Fourier transform infrared spectrometer(TENSOR 27)to conduct contact angle test and infrared spectrum test to evaluate the hydrophilicity and surface composition changes of PET films respectively.First,the PET film is cut and pretreated with ultrasonic cleaning,followed by initiation and modification reactions;Second,during the initiation reaction,different amounts of TBHP(0%,1%,2%,3%,4%)were added,and the temperature-controlled magnetic stirrer(ZNCL-DB230)was used at 40℃and the rotation speed was 450 r/min with heating and stirring;Third,after ultrasonic cleaning,change the type of PVP(PVP-K17,PVP-K30,PVP-K90)and dosage(0%,2.5%,5%,7.5%,10%),the modification reaction is carried out under the condition of rotating speed 600 r/min,80℃,the final sample can be obtained by ultrasonic cleaning and drying and placing for 24 h.During the contact angle test of the sample,drop 2μL of water droplets on the sample to be tested at least

关 键 词：PET薄膜 聚乙烯吡咯烷酮 亲水改性 表面接枝 接触角 

分 类 号：TB34[一般工业技术—材料科学与工程]