A stimulus-responsive helical polyyne infrared radiation material and its preparation method

An infrared radiation and responsive technology, which is applied in the preparation of organic functional polymer materials and the field of infrared stealth materials, can solve the problems of large thickness, low emission colored pigment molecular design difficulty, high infrared emissivity, etc., and achieve mild reaction conditions , good thermal stability and controllability of infrared radiation performance, and the effect of simple preparation process

Active Publication Date: 2021-09-28
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As far as the current situation is concerned, it is very difficult to design low-emission colored pigment molecules. So far, there are very few colored pigments that are really obtained by synthesizing new molecules or changing molecular structures.
In addition, when the infrared stealth paint is coated, the thickness is large, resulting in a large weight, which is inconvenient to carry and apply; the coating made of infrared stealth paint has low physical and mechanical properties and adhesion, and it is difficult to withstand long-term ultraviolet radiation and exposure. Atmospheric corrosion; and the infrared emissivity of microwave and infrared compatible camouflage materials using infrared stealth coatings is high, which is difficult to meet the requirements of military materials

Method used

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  • A stimulus-responsive helical polyyne infrared radiation material and its preparation method
  • A stimulus-responsive helical polyyne infrared radiation material and its preparation method
  • A stimulus-responsive helical polyyne infrared radiation material and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0025] a) Under ice bath, 1.73g (S)-2-(6-hydroxyl-2-naphthalene)propionic acid, 1.51g isobutyl chloroformate, 1.01g N-methylmorpholine were added to a tank containing 50mL tetrahydrofuran In the reaction kettle, after 15 minutes of reaction, add 10 mL of propargylamine tetrahydrofuran solution with a concentration of 0.8 mol / L dropwise into the mixed solution. After 15 minutes of dropwise addition, continue the reaction at 30°C for 12 hours, filter, and distill off the tetrahydrofuran under reduced pressure at 60°C. Then extract with 30mL ethyl acetate each time, combine the extracts 3 times to get the extraction mixture, and successively use 25mL of hydrochloric acid aqueous solution with a mass fraction of 2wt%, 25mL of saturated NaHCO 3 aqueous solution and 25mL saturated NaCl aqueous solution to wash the extract, and the obtained extract was washed with 2.2g of anhydrous MgSO 4Dry for 12 hours, filter, and distill the filtrate to remove ethyl acetate under reduced pressure...

example 2

[0032] a) Under ice bath, 2g (S)-2-(6-hydroxyl-2-naphthalene)propionic acid, 1.8g isobutyl chloroformate, 1.4g N-methylmorpholine were added to the tank containing 100mL tetrahydrofuran solution React in the reaction kettle for 20min, then add 30mL propargylamine tetrahydrofuran solution with a concentration of 1.2mol / L dropwise to the mixed solution, after 20min dropwise, react the reaction mixture at 30°C for 20h, filter, and depressurize at 50°C THF was distilled off, and then extracted with 30 mL of ethyl acetate each time, and the extracts were combined three times to obtain an extraction mixture, which was successively washed with 30 mL of aqueous hydrochloric acid solution with a mass fraction of 3 wt%, and 30 mL of saturated NaHCO 3 aqueous solution and 30mL saturated NaCl aqueous solution to wash the extract, and the obtained extraction mixture was washed with 2g of anhydrous MgSO 4 Dry for 12 hours, filter, distill the filtrate under reduced pressure at 40°C to remov...

example 3

[0039] a) Under ice bath, 1.50g (S)-2-(6-hydroxy-2-naphthalene)propionic acid, 1.37g isobutyl chloroformate, 0.81g N-methylmorpholine were added to a tank containing 40mL tetrahydrofuran In the reaction kettle, after 25 minutes of reaction, add 10 mL of propargylamine tetrahydrofuran solution with a concentration of 1.00 mol / L dropwise into the mixed solution. After 25 minutes of dropwise addition, continue the reaction at 30°C for 18 hours, filter, and distill off the tetrahydrofuran under reduced pressure at 55°C. Then extract with 20mL ethyl acetate each time, combine the extracts 3 times to obtain the extraction mixture, and successively use 20mL of hydrochloric acid aqueous solution with a mass fraction of 2wt%, 20mL of saturated NaHCO 3 aqueous solution and 20mL saturated NaCl aqueous solution to wash the extract, and the washed extract mixture was washed with 3.6g of anhydrous MgSO 4 Dry at 25°C for 12h, filter, evaporate the filtrate to remove ethyl acetate under redu...

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Abstract

The invention is a stimuli-responsive helical polyalkyne infrared radiation material, which is obtained by atom transfer radical polymerization of a bromine-containing alkyne copolymer and an amphiphilic double-bond-containing monomer, and its general structural formula is: R 1 or the degree of polymerization m is an integer of 1 to 1,000, n is an integer of 1 to 1,000, and q is an integer of 1 to 1,000. In the present invention, the bromine-containing alkyne copolymer and the amphiphilic double-bond-containing monomer are polymerized by atom transfer radicals to prepare stimulus-responsive helical polyalkyne infrared radiation materials with different stimulus responses, which are achieved by changing the temperature and pH. Low infrared emissivity adjustment in the 8-14μm band. At the same time, the preparation process of the material is simple, the reaction conditions are mild, and the material has good thermal stability and infrared radiation performance controllability.

Description

technical field [0001] The invention relates to a stimulus-responsive helical polyyne infrared radiation material and a preparation method, which belongs to the preparation category of organic functional polymer materials and can be applied to infrared stealth materials. Background technique [0002] Polyacetylenes are special natural compounds with high unsaturation and chemical activity. It has the characteristics of low density, easy processing, corrosion resistance, large-area film formation, and the conductivity can be adjusted in the range of more than ten orders of magnitude. It can not only be used as a substitute for various metal materials and inorganic conductive materials, but also has become a An indispensable class of materials in many advanced industrial sectors and cutting-edge technology fields. [0003] At present, the research on infrared stealth materials at home and abroad is very active, such as conductive polymers, nano-films, ultrafine particles, fer...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F281/00C08F220/54C08F220/34C08F238/00
CPCC08F238/00C08F281/00C08F2438/01C08F220/54C08F220/34
Inventor 周钰明胡赛春王泳娟卜小海何曼贺强仲洋洋张一卫杨晓明
Owner SOUTHEAST UNIV
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