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A kind of hydrogen-sensitive composite silica gel material and preparation method thereof

A technology of silica gel and vinyl silicone rubber, which is applied in the field of hydrogen-sensitive composite silica gel materials and its preparation, can solve the problems of limited leakage point location capability, leakage, obvious changes in pressure/consumption, etc., and achieve rapid discoloration of mechanical properties and processes. Non-toxic and harmless, the effect of simple preparation method

Active Publication Date: 2021-11-12
BEIJING INST OF AEROSPACE TESTING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Existing hydrogen leak detection methods are mainly divided into pressure / consumption monitoring and hydrogen concentration gas sensor methods. Hydrogen leak detection methods can prompt the occurrence of leakage for abnormal pressure / consumption, but cannot locate the leak point
In large-volume and high-flow hydrogen transportation equipment, local hydrogen leakage is difficult to cause significant changes in pressure / consumption in the system; while the hydrogen concentration gas sensor method has high installation and maintenance costs, and the ability to locate leak points is limited. It is impossible to find the leak point quickly and accurately due to problems such as locating the approximate range of the leak point

Method used

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  • A kind of hydrogen-sensitive composite silica gel material and preparation method thereof
  • A kind of hydrogen-sensitive composite silica gel material and preparation method thereof
  • A kind of hydrogen-sensitive composite silica gel material and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Raw material ratio:

[0044]

[0045] Among them, the reinforcing whitening filler is compounded by zinc oxide and silicon dioxide in a weight ratio of 1:1.

[0046] Preparation:

[0047] Put 60 parts by weight of vinyl silicone rubber, 10 parts by weight of methyl MQ silicone resin, and 24 parts by weight of a compound of zinc oxide and silicon dioxide into a vacuum drying oven for drying; the drying temperature of the vacuum drying oven is 50 ° C, and the drying time is for 3 hours;

[0048] Put it into the mixer, the speed of the mixer is 180r / min, and the stirring time is 8 minutes; the mixture after stirring is put into the double-roller mill, the speed of the double-roller mill is 100r / min, the roller temperature is 150°C, and the refining time is For 10 minutes, add 2 parts by weight of molybdenum oxide, 2 parts by weight of palladium-gold catalyst, 1 part by weight of hydroxyl silicone oil, and 1 part by weight of hydrogen-containing silicone oil, and carry...

Embodiment 2

[0050] Raw material ratio:

[0051]

[0052] Among them, the reinforcing whitening filler is compounded by zinc oxide and silicon dioxide in a weight ratio of 1:1.

[0053] Preparation:

[0054] Put 50 parts by weight of vinyl silicone rubber, 20 parts by weight of methyl MQ silicone resin, and 24 parts by weight of zinc oxide and silicon dioxide compound into a vacuum drying oven for drying; the drying temperature of the vacuum drying oven is 70 ° C, and the drying time is 8 hours;

[0055] Put it into the mixer, the speed of the mixer is 320r / min, and the stirring time is 20 minutes; the mixture after stirring is added into the double-roller mill, the speed of the double-roller mill is 200r / min, the roller temperature is 210°C, and the refining time is For 20 minutes, add 2 parts by weight of molybdenum oxide, 2 parts by weight of palladium-gold catalyst, 1 part by weight of hydroxyl silicone oil, and 1 part by weight of hydrogen-containing silicone oil, and carry out c...

Embodiment 3

[0057] Raw material ratio:

[0058]

[0059]

[0060] Among them, the reinforcing whitening filler is compounded by zinc oxide and silicon dioxide in a weight ratio of 1:1.

[0061] Preparation:

[0062]Put 40 parts by weight of vinyl silicone rubber, 30 parts by weight of methyl MQ silicone resin, and 24 parts by weight of zinc oxide and silicon dioxide compound into a vacuum drying oven for drying; the drying temperature of the vacuum drying oven is 60 ° C, and the drying time is 4 hours;

[0063] Put into the mixer, the rotating speed of the mixer is 240r / min, and the stirring time is 10 minutes. After stirring, the mixture is added into the double-roller mill. The rotating speed of the double-roller mill is 150r / min, and the roller temperature is 180°C. After 15 minutes, add 2 parts by weight of molybdenum oxide, 2 parts by weight of palladium-gold catalyst, 1 part by weight of hydroxyl silicone oil, and 1 part by weight of hydrogen-containing silicone oil, and the...

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Abstract

The invention relates to a hydrogen-sensitive composite silica gel material and a preparation method thereof. The hydrogen-sensitive composite silica gel material includes a composite silica gel matrix and hydrogen-sensitive active components, and changes color when encountering hydrogen gas. The hydrogen-sensitive composite silica gel material provided by the present invention can rapidly change color within 60 seconds when exposed to hydrogen at room temperature, providing a convenient, fast and sensitive hydrogen detection method for people to intuitively judge the presence of hydrogen with the naked eye.

Description

technical field [0001] The invention relates to a color-changing material and a preparation method thereof, in particular to a hydrogen-sensitive composite silica gel material and a preparation method thereof. Background technique [0002] Hydrogen is also a future new energy with huge application potential. With the improvement and maturity of hydrogen energy-related utilization technologies such as hydrogen-oxygen engine and hydrogen fuel cell, the application demand of hydrogen energy in aerospace, automobile and other fields will also usher in a rapid increase. increase. In the process of hydrogen utilization, the safe storage and transportation of hydrogen are very important links. However, hydrogen is easy to diffuse and difficult to liquefy, so it is prone to leakage during storage and transportation. Hydrogen leakage will not only cause the loss of hydrogen, but also bring great danger due to its flammable and explosive characteristics. Therefore, in the storage a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L83/07C08L83/04C08L83/05C08K13/02C08K3/36C08K3/22
Inventor 申娟时云卿朱晓彤陈静苏嘉南赵康余炳延安刚
Owner BEIJING INST OF AEROSPACE TESTING TECH
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