酸度、温度对液压油和润滑油荧光特性的影响

通过分析HyJet V磷酸酯液压油的环境(润滑油等)及干扰因素(酸度和温度等)的影响，研究荧光法检测飞机用液压油泄漏的可行性。利用荧光分光光度计，获得不同酸度和温度时HyJet V磷酸酯液压油、Jet Oil II润滑油、2197润滑油的荧光特性，实验结果：HyJet V磷酸酯液压油、Jet Oil II润滑油、2197润滑油的荧光峰分别在362，405和456 nm。温度对HyJet V磷酸酯液压油影响较小；Jet Oil II润滑油、2197润滑油荧光强度随温度升高逐渐减小。酸度增加时，HyJet V磷酸酯液压油荧光峰从370 nm渐变为362 nm，荧光强度逐渐减小；Jet Oil II润滑油荧光峰保持405 nm不变，荧光强度逐渐减小；2197润滑油荧光峰由456 nm处红移至523 nm，出现双荧光峰，直至荧光特性消失。结果表明：在环境及干扰因素的影响下，HyJet V磷酸酯液压油的荧光特性基本保持不变，并且区别于Jet Oil II润滑油、2197润滑油。因此，实验证明利用荧光法检测HyJet V磷酸酯液压油泄漏是可行的。

Acidity and Temperature Effect on the Fluorescence Characteristics of Hydraulic Oils and Lubricants

By analyzing HyJet V phosphate ester hydraulic oil environmental impacts (oil, etc.) and confounding factors (pH, temperature, etc.), the feasibility was studied for the fluorescence detection of aircraft hydraulic oil leaks. By using the fluorescence spectrophotometer at various acidities and temperatures, the fluorescence properties of HyJet V phosphate ester hydraulic oil, Jet Oil II lubricant and 2197 lubricant were gained. The experimental results are shown as following: The fluorescence peaks of HyJet V phosphate ester hydraulic oil, Jet Oil II lubricant and 2197 lubricant are at 362, 405 and 456 nm, respectively. The impact of temperature on HyJet V phosphate ester hydraulic oil is less effective; Jet Oil II lubricant and 2197 lubricant fluorescence intensity decreases with increasing temperature. When acidity increases, the fluorescence peak of HyJet V phosphate ester hydraulic oil gradient shifts from 370 to 362 nm, and the fluorescence intensity decreases; the fluorescence peak of Jet Oil II lubricant is always 405 nm, while the fluorescence intensity decreases; the fluorescence peak of 2197 lubricant at 456 nm red shifts to 523 nm, and double fluorescence peaks appeare. The results are shown as following: under the influence of the environment and interference factors, the fluorescence characteristics of HyJet V phosphate ester hydraulic oil remain unchanged, and distinguish from Jet Oil II lubricant and 2197 lubricant. Therefore, the experiments indicate that the detection of HyJet V phosphate ester hydraulic oil leak is feasible by using fluorescence method.