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A kind of fluorine-containing polyimide humidity sensitive capacitor and preparation method thereof
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A humidity-sensitive capacitor and polyimide technology, applied in capacitors, electrical components, etc., can solve the problems of poor sensitivity, accuracy, and resolution, and achieve the effects of convenient source, mild reaction conditions, and easy molecular structure
Inactive Publication Date: 2018-01-02
DONGHUA UNIV +1
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In addition to poor sensitivity, accuracy and resolution, traditional measurement methods are difficult to connect with modern communication record control equipment
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Embodiment 1
[0031] 3.66 g (0.01 mole) of 2,2-bis(3-amino-4-hydroxyphenyl) hexafluoropropane (BAHPFP), 22.00 g (0.11 mole) of 3,3'-diaminodiphenyl ether, 35.89 g ( 0.122 moles) of 3,3',4,4'-tetracarboxybiphenyl dianhydride and 248 grams of N,N-dimethylacetamide were put into the reactor, and after stirring and reacting for 2 hours at 0°C, 309.55 grams of viscous Thick transparent homogeneous fluorine-containing moisture-sensitive polyimide precursor solution, denoted as HSP-1.
Embodiment 2
[0033] 3.66 g (0.01 mol) of 2,2-bis(3-amino-4-hydroxyphenyl)hexafluoropropane (BAHPFP), 20.00 g (0.10 mol) of 3,4'-diaminodiphenyl ether and 31.70 g ( 0.10 moles) 2,6-bis(4-aminophenoxy) benzonitrile, 66.07 grams (0.213 moles) 3,3',4,4'-tetracarboxydiphenyl ether dianhydride, 428 grams of N,N- Dimethylacetamide and 300 grams of N-methyl-2-pyrrolidone were put into the reaction kettle, and after stirring and reacting at 5°C for 5 hours, 849.43 grams of viscous, transparent and homogeneous fluorine-containing moisture-sensitive polyimide precursors were obtained solution, denoted as HSP-2.
Embodiment 3
[0035] 3.66 g (0.01 mol) of 2,2-bis(3-amino-4-hydroxyphenyl)hexafluoropropane (BAHPFP), 29.7 g (0.15 mol) of 4,4'-diaminodiphenylmethane, 35.89 g ( 0.122 moles) of 3,3',4,4'-tetracarboxybiphenyl dianhydride and 18.65 grams (0.042 moles) of 2,2-bis(3,4-dicarboxyphenyl)hexafluoropropane dianhydride, 440 grams of N , N-dimethylacetamide was put into the reaction kettle, and after stirring and reacting at 2°C for 4 hours, 527.90 g of a viscous, transparent and homogeneous fluorine-containing moisture-sensitive polyimide precursor solution was obtained, which was designated as HSP-3.
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Abstract
The invention relates to a fluorine-containing polyimide humidity-sensitive capacitor and a preparation method thereof. The humidity-sensitive capacitor is composed of a substrate, a lower electrode, a fluorine-containing moisture-sensitive polyimide coating and an upper electrode; wherein, the fluorine-containing Moisture-sensitive polyimide is formed by reacting 2,2-bis(3-amino-4-hydroxyphenyl)hexafluoropropane, aromatic diamine and aromatic dianhydride. The preparation method includes: cleaning the substrate with a cleaning solution, putting it in a drying oven to dry, drying, and then vacuum evaporation to make the lower electrode, JP-6 conductive adhesive to guide the lead wire of the lower electrode, and then spin-coating fluorine-containing moisture-sensitive polyimide Amine precursor solution, imidization, vacuum evaporation to make the upper electrode, sectioning, rinsing with deionized water, drying, screening, surface modification, JP‑6 conductive glue lead the upper electrode lead, and prepare the fluorine-containing polyimide moisture sensitive capacitance. The invention has the advantages of high sensitivity, small hysteresis, simple manufacturing process, low cost, etc., and has good market prospects.
Description
technical field [0001] The invention belongs to the field of functional polymer materials, in particular to a fluorine-containing 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 telescopic h...
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