Color rendering fluorescence silica gel and preparation method thereof, and application of color rendering fluorescence silica gel in aerocraft oil leakage detection

A technology of aircraft and silica gel, which is applied in the direction of detecting the appearance of fluid at the leak point, conducting material analysis by optical means, and using liquid/vacuum degree for liquid tightness measurement, etc., to achieve good color rendering effect, obvious fluorescence effect, and improve The effect of test flight efficiency

Active Publication Date: 2018-12-14
THE SECOND RES INST OF CIVIL AVIATION ADMINISTRATION OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0012] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a color-developing fluorescent silica gel and its preparation method and its application in the detection of oil leakage of aviation aircraft, so as to solve the conditions of high humidity, high and low temperature, and high airspeed during the flight of the aircraft. It can effectively detect the problem of fuel overflow detection at the vent scoop of the fuel tank during the flight process of the aircraft, which ensures that the test tasks can be arranged reasonably and flexibly during the flight test, improves the efficiency of the test flight, and fills the gap in China

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  • Color rendering fluorescence silica gel and preparation method thereof, and application of color rendering fluorescence silica gel in aerocraft oil leakage detection
  • Color rendering fluorescence silica gel and preparation method thereof, and application of color rendering fluorescence silica gel in aerocraft oil leakage detection
  • Color rendering fluorescence silica gel and preparation method thereof, and application of color rendering fluorescence silica gel in aerocraft oil leakage detection

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preparation example Construction

[0072] The preparation method of chromogenic fluorescent silica gel comprises the steps of: mixing a fluorescent chromogenic agent and silica gel, stirring in a dry and light-proof environment, stopping stirring when the silica gel is uniform reddish brown, and then depositing to obtain chromogenic fluorescent silica gel; preferably, Chromogenic fluorescent silica gel should be stored in a dark place or under normal pressure nitrogen without light for future use.

[0073] It should be noted that when some substances are illuminated, in addition to absorbing light of a specific wavelength, they will also emit light with a longer wavelength than the absorbed light. This phenomenon is called photoluminescence. The most common photoluminescence phenomenon is is fluorescent. The phenomenon of fluorescence was first recorded in 1575 by the Spanish botanist and physician N. Monardes, who mentioned that an aqueous solution of wood slices called "Lignum Nephriticum" would appear sky bl...

Embodiment 1

[0102]This embodiment provides a color-developing fluorescent silica gel. The raw material components include: 1 part of fluorescent color-developing agent (such as oil red AB4) and 10 parts of activated colorless silica gel.

[0103] The selection of colorless silica gel should meet the specification requirements shown in the following table 1. The method of measuring the pH value: calibrate the pH meter with standard buffers with pH values ​​of 4 and 7 respectively, put 5g of silica gel in a 250mL beaker, add 100mL of water Drink a stirring bar, place it on a magnetic device and stir for 20 minutes, and then measure its pH value with a calibrated pH meter.

[0104] Silica gel should be activated before use, put it in a shallow container, dry at 175°C for 3 hours, and put it in a sealed container while it is hot to avoid moisture.

[0105] Table 1 Silicone performance table

[0106]

[0107]

Embodiment 2

[0109] This embodiment provides the preparation method of the chromogenic fluorescent silica gel of Embodiment 1, including steps:

[0110] Mix 1 part of fluorescent color developer (such as oil red AB4) and 10 parts of activated colorless silica gel, stir for 0.5h in a dry and dark environment, stop stirring when the silica gel is uniform reddish brown, and then place it in a dry and dark place Deposit under nitrogen pressure for 5-15 days to obtain chromogenic fluorescent silica gel. Chromogenic fluorescent silica gel should be stored in a dark place under normal pressure nitrogen for future use.

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Abstract

The present invention relates to a color rendering fluorescence silica gel and a preparation method thereof, and an application of color rendering fluorescence silica gel in aerocraft oil leakage detection. The raw material components of the color rendering fluorescence silica gel comprise a fluorescence color rendering agent and silica gel, and the mass ratio of the fluorescence color rendering agent and the silica gel is (0.8-1.2): / (9-21). The preparation method comprises the steps of: mixing the fluorescence color rendering agent and the silica gel, stirring the mixture until the silica gelbecomes uniform red brown, and performing deposition of the mixture to obtain color rendering fluorescence silica gel. After the color rendering fluorescence silica gel absorbs aircraft fuel, the color rendering fluorescence silica gel has a good fluorescence color rendering effect in a condition of a 365nm conventional ultraviolet lamp, has high discrimination for two phases of water and oil, can rapidly absorb overflowing fuel oil liquid drops and can maintain fuel oil trace in a high-humidity and high-steam condition, can store the fluorescence color rendering effect for long time, can beeffectively used on the ground in a range from a high temperature to a low temperature, cannot generate phenomena such as 'cowardice' and falling-off in the high-humidity and large-airspeed high-altitude flight conditions, and has no corrosivity for the oil paint of the skin and the surface of the aircraft.

Description

technical field [0001] The invention relates to the technical field of chemical detection, in particular to a color-developing fluorescent silica gel, a preparation method thereof, and an application in the detection of oil leakage of aviation aircraft. Background technique [0002] Commercial aircraft fuel tank venting systems use an "open vent system" that communicates the oil-free space above the fuel level in each fuel tank with the outside atmosphere. Proper fuel tank venting is critical throughout the operational flight envelope of the aircraft. Within the envelope, this facility allows the fuel tanks to "breathe" as the aircraft climbs and descends. Without such a facility, it would A large pressure difference develops between the oil-free space and the outside atmosphere, resulting in very large forces acting on the tank structure. The vent system plays a key role in protecting the fuel tank structure from structural failure when the aircraft is transitioning betwee...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M3/20G01N21/64G01N21/78
CPCG01M3/20G01N21/643G01N21/78
Inventor 柳华曾泰吴海涛曾萍李志强夏祖西王文武
Owner THE SECOND RES INST OF CIVIL AVIATION ADMINISTRATION OF CHINA
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