阳极氧化铝基光学压强传感涂层的制备及其性能

Preparation and Performance of Anodized Alumina-Based Optical Pressure Sensitive Coatings

光学压强传感涂料压力测量技术具有可连续、准确、定量获取表面压力分布,不影响表面流场,空间解析度高等优点,目前国内少有研究。通过二次阳极氧化法制备了阳极氧化铝膜层作为压强传感涂料的载体,通过有机方法合成了四苯基卟啉镁作为发光体,并通过浸渍方法制备出多孔氧化铝基压强传感涂层。对所得的氧化铝膜的表面形貌和XRD物相分析表明,氧化铝膜层排列有序,分布均匀,孔径大小一致,约为100～120 nm;通过紫外-可见分光光度计和荧光分光光度计对合成的四苯基卟啉镁进行吸收和发射光谱分析,确定了其激发光波长为560 nm;对该多孔氧化铝基光学压强传感涂层的压敏性能测试表明:多孔氧化铝载体使发光分子均匀地分布于整个涂层中,降低了双位猝灭现象的发生,涂层的压敏灵敏度A值约为0.3。

Anodizing alumina coating was prepared by two-step anodizing process and used as a carrier of pressure sensitive paint.Magnesium tetraphenylporphyrin luminophore was obtained via organic synthesis.Porous alumina-based pressure sensitive coating was then prepared via a soaking route.The surface morphology and phase composition of as-prepared anodizing alumina coating were analyzed.The absorption and emission spectra of as-synthesized magnesium tetraphenylporphyrin were measured using an ultraviolet-visible light spectrophotometer and a fluorescence spectrophotometer.The pressure sensitive performance of the porous alumina-based pressure sensitive coating was evaluated.Results indicate that as-prepared anodizing alumina coating is well ordered and has a narrow pore size distribution of about 100~120 nm.As-synthesized magnesium tetraphenylporphyrin had an exciting light wavelength of 560 nm.The porous anodizing alumina coating as a carrier was able to ensure uniform distribution of the luminophore molecules in the pressure sensitive coating and thereby inhibit double-site quenching effect.As-prepared pressure sensitive coating had a pressure sensitivity index of about 0.3.