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Method for preparing radar absorbing materials with hide glue fibril

A radar absorbing material and skin collagen technology, applied in chemical instruments and methods, other chemical processes, etc., can solve the problems of unsuitable paint use, limited wide application, loss of wave absorbing effect, etc., and achieve strong absorption capacity and strong wave absorption. performance, effect of absorbing frequency bandwidth

Active Publication Date: 2012-10-03
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main reason is that the nature of the Schiff base and its salt is very unstable, and it is easy to undergo addition reaction with water, hydrogen halide, bisulfite and hydrogen cyanide, etc., so that its chemical structure changes and loses a certain wave-absorbing effect. , so not suitable for use as a coating
In addition, because the price of ethylenediamine, aniline, phenylenediamine, etc. used in the preparation of Schiff base and its salts is also relatively expensive, thus limiting its wide application

Method used

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  • Method for preparing radar absorbing materials with hide glue fibril
  • Method for preparing radar absorbing materials with hide glue fibril
  • Method for preparing radar absorbing materials with hide glue fibril

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] After removing hair and non-collagen components, the cowhide is crushed, washed, treated with NaAc-Hac buffer solution of pH 4.2 for 6 hours, and then vacuum-dried at 40°C for 12 hours to obtain hide collagen fibers with a particle size of 0.2-2.0 mm.

[0027] Add 50 grams of the obtained skin collagen fibers and 800 grams of absolute ethanol into a reaction kettle with a stirrer, a thermometer and a reflux condenser, adjust the pH to 8.0, then add 50 grams of salicylaldehyde, heat up and stir at 50°C React for 6 hours, then add 55 grams of ferric chloride, continue to stir and react at 50°C for 3 hours, and finally vacuum-dry the reactant at 50°C for 14 hours to obtain salicylaldehyde and Fe(III)-modified bovine collagen fibers Fe-Sa-CF radar absorbing material.

Embodiment 2

[0029] Wash waste pigskin scraps, crush and wash them, treat them with NaAc-Hac buffer solution with pH 4.2 for 6 hours, and then dry them under vacuum at 40°C for 12 hours to obtain skin collagen fibers with a particle size of 0.2-2.0 mm .

[0030] Add 50 grams of the obtained skin collagen fibers and 800 grams of absolute ethanol into a reaction kettle with a stirrer, a thermometer and a reflux condenser, adjust the pH to 10.0, then add 50 grams of salicylaldehyde, heat up and stir at 60°C React for 2 hours, then add 34 grams of silver nitrate, continue to stir and react at 60°C for 2 hours, and finally dry the reactant in vacuum at 60°C for 12 hours to obtain salicylaldehyde and Ag(I)-modified pigskin collagen fibers Ag -Sa-CF radar absorbing material.

Embodiment 3

[0032] Remove the hair and non-collagen components from the pigskin, crush and wash it, treat it with NaAc-Hac buffer solution with pH 4.2 for 6 hours, and then dry it under vacuum at 40°C for 12 hours to obtain skin collagen fibers with a particle size of 0.2-2.0 mm .

[0033] Add 50 grams of the obtained skin collagen fibers and 900 grams of absolute ethanol into a reaction kettle with a stirrer, a thermometer and a reflux condenser, adjust the pH to 9.0, then add 40 grams of glutaraldehyde, heat up and stir at 40°C React for 8 hours, then add 55 grams of ferric chloride, continue to stir and react at 40°C for 5 hours, and finally dry the reactant in vacuum at 40°C for 16 hours to obtain glutaraldehyde and Fe(III)-modified pigskin collagen Fiber Fe-Gl-CF radar absorbing material.

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Abstract

The invention discloses a method for preparing radar absorbing materials with hide glue fibril, comprising the following steps: the hide glue fibril is absolutely dried into 100 parts, and 100 parts of the hide glue fibril and 1000-2000 parts of dispersing agents are added in a reaction device, the pH is adjusted to 7.5-10.0, and then 80-300 parts of aldehydes compound are added in the device, the mixture is stirred and reacted for 2-8 hours at the 30-60 DEG C, and then 68-110 parts of metal salt are added, and the mixture is stirred and reacted for 2-6 hours at the 30-60 DEG C, and is dried.The radar absorbing materials prepared by the hide glue fibril has wide frequency band and strong adsorption capacity to radar waves, and the source of the raw material is wide, the price is low, thedensity is low, the quality is light, the processability is good, and the material can be filmed directly, thereby well solving the problems that the wave-absorbing material can lose the wave adsorption efficiency in the formation of the application and in the disposition and using process when being used as coating material.

Description

technical field [0001] The invention belongs to the technical field of preparation of radar absorbing materials, and in particular relates to a method for preparing radar absorbing materials with skin collagen fibers. Background technique [0002] Radar absorbing materials can be used not only for the stealth of aircraft, missiles, ships, vehicles, etc., but also for the wall materials of microwave anechoic chambers to reduce interference and improve the accuracy of measurement. They can also be used as anti-radiation clothing, appliances, mobile phones, Anti-radiation materials for electronic products such as computers and televisions, etc. [0003] Generally, radar absorbing materials can be divided into two categories: inorganic absorbing materials and organic absorbing materials. Inorganic radar absorbing materials include iron-based (such as polycrystalline iron fiber, carbonyl iron), carbon-based (such as graphite, carbon fiber) and ceramic-based (such as silicon carb...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K3/00
Inventor 廖学品石碧刘一山唐晓蓉曹明蓉
Owner SICHUAN UNIV
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