利用飞秒激光制备可食品接触的自清洁表面(特邀)  

Preparation of Food-Safe Self-Cleaning Surfaces Using Femtosecond Laser(Invited)

作　　者：张晨初 赵杰 赵强强 刘法亭 潘登 吴东[3] Zhang Chenchu;Zhao Jie;Zhao Qiangqiang;Liu Fating;Pan Deng;Wu Dong(Anhui Province Key Laboratory of Aerospace Structural Parts Forming Technology and Equipment,Institute of Industry&Equipment Technology,Hefei University of Technology,Hefei 230009,Anhui,China;Information Materials and Intelligent Sensing Laboratory of Anhui Province,Anhui University,Hefei 230601,Anhui,China;Key Laboratory of Mechanical Behavior and Design of Materials,Chinese Academy of Sciences,Department of Precision Machinery and Precision Instrumentation,University of Science and Technology of China,Hefei 230022,Anhui,China)

机构地区：[1]合肥工业大学工业与装备技术研究院航空结构件成形制造与装备安徽省重点实验室,安徽合肥230009 [2]安徽大学信息材料与智能感知安徽省实验室,安徽合肥230601 [3]中国科学技术大学精密机械与精密仪器系中国科学院材料力学行为和设计重点实验室,安徽合肥230022

出　　处：《光学学报》2024年第17期322-329,共8页Acta Optica Sinica

基　　金：国家自然科学基金(62105090,62205236);中央高校基本科研业务费专项(JZ2022HGTB0300)。

摘　　要：聚醚醚酮(PEEK)材料因其优异的力学性能和食品接触安全特性而被广泛应用于食品加工领域,但是PEEK材料本身的亲水特性导致其极易残留液体,从而滋生细菌,引发食品安全问题。本研究探讨了飞秒激光加工技术在PEEK材料疏水处理上的应用。通过飞秒激光诱导微纳结构实现非化学处理的疏水PEEK材料表面,使其对牛奶和果汁等液体具备自清洁能力。这种非化学处理的自清洁表面加工方法,在确保食品安全方面具有重要意义。Objective With increasing concern for food safety,the standards for food-safe materials have become more stringent.Polyether ether ketone(PEEK)is a high-performance thermoplastic with advantages such as high mechanical strength,good stability,and low density,making it widely used in aerospace,medical,and food industries.However,traditional PEEK surfaces are inherently hydrophilic,making them prone to attracting liquids like oil or milk,which can lead to contamination risks during food processing.Modifying PEEK surfaces to be hydrophobic can help maintain their self-cleaning properties.However,the traditional preparation of these self-cleaning surfaces often involves chemical methods,such as chemical etching,electrochemical etching,or chemical vapor deposition,which introduce additional chemical reagents and may pose food safety concerns.In this study,we use femtosecond laser processing technology to create micro/nanostructures on the PEEK surface,achieving a chemically-free self-cleaning surface.This method provides high precision,non-contact processing,and high efficiency without the need for chemical reagents,making it highly suitable for applications requiring stringent food safety.Methods In this study,femtosecond laser technology is applied to fabricate micro/nanostructures on PEEK materials to explore their self-cleaning capabilities.Initially,the influence of laser power density on the hydrophobicity of the fabricated structures is examined.Based on these findings,the effects of laser scanning speed and scanning times on hydrophobicity are further investigated.It is observed that rapid surface scanning enhances the self-cleaning properties of the structures.In addition,scanning electron microscopy(SEM)coupled with energy dispersive spectroscopy(EDS)is used to measure the carbon(C)and oxygen(O)content in the structures before and after processing to analyze its influence on self-cleaning ability.Finally,a self-cleaning capability test is conducted using water,juice,and milk to evaluate the performance of th

关 键 词：超快光学 PEEK材料 飞秒激光加工 微纳结构 疏水性 自清洁 

分 类 号：TH162[机械工程—机械制造及自动化]