光热自愈合超疏水膜的制备和防冰性能  

Preparation and anti-icing performance of a photothermal self-healing superhydrophobic membrane

作　　者：刘黎明 陈盛龙 潘炜 LIU Liming;CHEN Shenglong;PAN Wei(School of Mechanical Engineering,Guangxi University,Nanning 530004,China;Key Laboratory of Manufacturing System and Advanced Manufacturing Technology,Guangxi University,Nanning 530004,China)

机构地区：[1]广西大学机械工程学院,南宁530004 [2]广西大学制造系统与先进制造技术重点实验室,南宁530004

出　　处：《复合材料学报》2025年第3期1436-1447,共12页Acta Materiae Compositae Sinica

基　　金：广西青年科学基金项目(2023JJB160178);广西科技基地和人才专项项目(AE30100196);广西大学引进人才科研项目(A3010051020)。

摘　　要：针对柔性超疏水膜基材料在户外防冰应用中面临动态抗润湿能力、机械耐久性和因紫外线氧化引起的化学耐久性不足等问题。本文通过对石墨烯、TiO_(2)和SiO_(2)等纳米颗粒氟化修饰,并将修饰后的颗粒分布在热塑性聚氨酯(TPU)基质内,通过优化激光加工参数,制备了一种可大变形的光热自愈合超疏水膜(PTHSHM)。本文研究了PTHSHM的动态抗润湿性、机械耐久性、防/除冰性能以及在物理/化学损伤下的愈合性能。PTHSHM在400%应变下,经1000次循环拉伸后表面水接触角不低于156.4°。同时,断裂后的PTHSHM在0.4 W/cm^(2)红外光照射下8 min后愈合效率达到97.6%。此外,在化学损伤-愈合方面,经过10次氧等离子刻蚀-修复循环后,其表面水接触角仍在5°±2°和155°之间可逆转换。此外,在-15℃的环境下,PTHSHM表面延迟结冰时间为350 s,冰粘附强度低至55 kPa,20μL冰滴在0.1 W/cm2的太阳光下的融化并滚落时间为77 s。综上,PTHSHM表现出良好的机械和化学耐久性,在延迟结冰时间和降低冻结粘附方面优势显著。To address challenges related to dynamic anti-wetting,mechanical durability,and chemical resistance due to UV oxidation faced by flexible superhydrophobic membrane materials in outdoor anti-icing applications,this paper presents a study on the fabrication and performance of a photothermal self-healing superhydrophobic membrane(PTHSHM).The membrane was prepared by fluorinated-graphene,TiO_(2)and SiO_(2)nanoparticles,and dispersing them in a thermoplastic polyurethane(TPU)matrix,followed by optimizing laser processing parameters to achieve the hydrophobic modification.The PTHSHM exhibited impressive performance in terms of dynamic antiwetting,maintaining a water contact angle of 156.4°even after 1000 cycles of stretching with a 400%strain.Moreover,it demonstrated efficient self-healing abilities,achieving a healing efficiency of 97.6%in 8 min under 0.4 W/cm^(−2)infrared illumination.Moreover,the membrane showed strong resistance to chemical damage,retaining a water contact angle of at least 155°after 10 cycles of oxygen plasma etching and repair.In anti-icing tests,the delayed freezing time and ice adhesion strength of PTHSHM is measured as 350 s and 55 kPa.A 20μL ice droplet melted and rolled off in 77 s under 0.1 W/cm^(2) sunlight.Overall,the PTHSHM displays excellent mechanical and chemical durability,along with significant advantages in delaying ice formation and facilitating ice removal,making it a promising candidate for various outdoor anti-icing applications.

关 键 词：超疏水 氟化石墨烯 大应变 自修复 光热除冰 自清洁 

分 类 号：O647[理学—物理化学] TB332[理学—化学]