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BAHPP type polyimide humidity-sensitive capacitor and preparing method thereof

A technology of humidity-sensitive capacitors and polyimide, which is used in capacitors, variable capacitors, capacitors that change the capacitance by non-mechanical methods, etc., can solve the problems of poor sensitivity, accuracy and resolution, and achieve convenient source, The effect of easy molecular weight and mild reaction conditions

Inactive Publication Date: 2015-10-28
DONGHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition to poor sensitivity, accuracy and resolution, traditional measurement methods are difficult to connect with modern communication record control equipment

Method used

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  • BAHPP type polyimide humidity-sensitive capacitor and preparing method thereof
  • BAHPP type polyimide humidity-sensitive capacitor and preparing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] 2.58 grams (0.01 moles) of 2,2-bis(3-amino-4-hydroxyphenyl) propane (BAHPP), 22.00 grams (0.11 moles) of 3,3'-diaminodiphenyl ether, 63.44 grams (0.122 moles ) 2,2-bis[4-(3,4-dicarboxyphenoxy)phenyl]propane dianhydride and 353 grams of N,N-dimethylacetamide were put into the reactor, and the reaction was stirred at 0°C for 2 After one hour, 440 grams of viscous transparent homogeneous BAHPP type moisture-sensitive polyimide precursor solution was obtained, which was designated as HSBAHPP-1.

Embodiment 2

[0038] 2.58 g (0.01 mol) of 2,2-bis(3-amino-4-hydroxyphenyl)propane (BAHPP), 20.00 g (0.10 mol) of 3,4'-diaminodiphenyl ether and 31.70 g (0.10 mol) ) 2,6-bis(4-aminophenoxy)benzonitrile, 62.62 grams (0.213 moles) of 3,3',4,4'-tetracarboxybiphthalic anhydride, 400 grams of N,N-dimethyl Acetamide and 300 grams of N-methyl-2-pyrrolidone were put into the reactor, and after 5 hours of stirring reaction at 5° C., 818 grams of viscous transparent homogeneous BAHPP type moisture-sensitive polyimide precursor solution was obtained. as HSBAHPP-2.

Embodiment 3

[0040] 2.58 grams (0.01 moles) of 2,2-bis(3-amino-4-hydroxyphenyl) propane (BAHPP), 43.8 grams (0.15 moles) of 1,3-bis(3-aminophenoxy)benzene, 37.82 Gram (0.122 mol) 3,3',4,4'-tetracarboxydiphenyl ether dianhydride and 18.65 gram (0.042 mol) 2,2-bis(3,4-dicarboxyphenyl)hexafluoropropane dianhydride, Put 510 grams of N,N-dimethylformamide into the reaction kettle, stir and react at 2°C for 4 hours, and obtain 612 grams of viscous, transparent and homogeneous BAHPP type moisture-sensitive polyimide precursor solution, denoted as HSBAHPP -3.

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Abstract

The invention relates to a BAHPP type polyimide humidity-sensitive capacitor and a preparing method thereof. The humidity-sensitive capacitor is composed of a substrate, a lower electrode, a BAHPP type humidity-sensing polyimide coating and an upper electrode, wherein 2, 2-bis(3-amino-4-hydroxyphenyl)propane (BAHPP), aromatic diamine and aromatic dianhydride react to obtain BAHPP type humidity-sensing polyimide. The preparing method comprises the steps of: placing the substrate into a drying box for drying after cleaning the substrate; carrying out drying; then preparing the lower electrode by means of vacuum vapor plating; guiding a lower electrode lead by JP-6 conductive adhesive; then coating a BAHPP type humidity-sensing polyimide precursor solution in a spin manner; carrying out imidization; preparing the upper electrode by means of vacuum vapor plating; carrying out slicing; flushing with deionized water; carrying out drying; carrying out screening; carrying out surface modifying; guiding an upper electrode lead with JP-6 conductive adhesive; and preparing the BAHPP type polyimide humidity-sensitive capacitor. The BAHPP type polyimide humidity-sensitive capacitor and the preparing method thereof has the advantages of high sensitivity, small humidity hysteresis, simple preparing process, low cost, good market prospect and the like.

Description

technical field [0001] The invention belongs to the field of functional polymer materials, and in particular relates to a BAHPP type polyimide humidity-sensitive capacitor and a preparation method thereof. Background technique [0002] In the fields of meteorology, environmental protection, national defense, aviation, aerospace, navigation, industry, agriculture, medical care, electronic microelectronics, etc., it is often necessary to measure and control the ambient humidity. The measurement of humidity is much more complicated than the measurement of temperature, mainly because temperature is an independent measurand, while the measurement of humidity cannot be measured due to the partial pressure of water vapor in the air, so it has to be transformed into The humidity value can only be obtained by measuring the secondary parameters related to humidity and then converting them. [0003] There are three main types of traditional humidity measurement tools, namely telescopi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G7/00C08G73/10
Inventor 虞鑫海周志伟
Owner DONGHUA UNIV
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