Homogeneous core-shell composite material PPy @ PANI and preparation method thereof

A composite material, core-shell technology, applied in chemical instruments and methods, other chemical processes, etc., can solve the problems of low polyaniline usage, increased polyaniline usage, uneven particles, etc., and achieves strong absorption capacity and wide absorption bandwidth. , the effect of enhancing absorption

CN105131901AInactive Publication Date: 2015-12-09HARBIN INST OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2015-12-09
Estimated Expiration
Not applicable · inactive patent

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Abstract

A homogeneous core-shell composite material PPy @ PANI and a preparation method thereof. The invention relates to a core-shell composite material and a preparation method thereof and solves the problems that when a wave-absorbing material is prepared from polyaniline, a large quantity of auto-polymerization exists due to increase of the use amount of the polyaniline, thereby causing low use amount of the polyaniline, less coating quantity and non-uniformity of particles. In the homogeneous core-shell composite material PPy @ PANI, polypyrrole is employed as a core material and polyaniline is employed as a wall material. The preparation method includes following steps: (1) preparing PPy micro-spheres; and (2) dispersing the PPy micro-spheres into an acid solution, stirring the dispersion in ice-water bath, adding an aniline monomer and ammonium persulfate, performing a reaction in the ice-water bath, and cleaning and drying a reaction product to obtain the homogeneous core-shell composite material PPy @ PANI. A wave-absorption material prepared from the homogeneous core-shell composite material PPy @ PANI is thin in wave-absorption layer, is light in weight, is wide in absorption band and is strong in adsorption capability. The material can be used in the field of stealth technology and electromagnetic wave shielding.
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Description

technical field

[0001] The invention relates to a core-shell composite material and a preparation method thereof. Background technique

[0002] With the rapid development of science and technology, radio technology has been widely used in various fields such as national defense technology, industrial and agricultural production, transportation, communication, information industry, etc., and has penetrated into thousands of households. It has created a huge material civilization for mankind. It also brings people into an environment full of electromagnetic radiation. Electromagnetic radiation is harmful to human life. It will affect the circulatory system, immunity, reproduction and metabolic functions of the human body. In severe cases, it will induce cancer and accelerate the proliferation of human cancer cells; it will also interfere with electronic equipment and cause signal distortion, affecting flammable and flammable Explosives, causing missile systems to fail, etc. ...

Examples

specific Embodiment approach 1

[0036] Embodiment 1: In this embodiment, the homogeneous core-shell composite material PPyPANI uses polypyrrole as the core material and polyaniline as the wall material.

specific Embodiment approach 2

[0037] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the mass ratio of polypyrrole as the core material to polyaniline as the wall material is 1:(0.2-2). Other steps and parameters are the same as those in Embodiment 1.

specific Embodiment approach 3

[0038] Specific embodiment three: The uniform core-shell composite material PPyPANI of this embodiment is prepared according to the following steps:

[0039] 1. Preparation of PPy balls: 0.08~0.12g FeCl 2 4H 2 O was dispersed in 60mL deionized water, then 0.8-1.2mL pyrrole monomer was added, and then 5-8mL H 2 o 2 React for 12 hours, then wash with acetone, and dry at 60°C for 12 hours;

[0040] 2. Disperse the polypyrrole microspheres prepared in step 1 into the hydrochloric acid solution, stir for 1 h under ice-water bath conditions, then add aniline monomer and ammonium persulfate under ice-water bath conditions and react for 24 hours, then wash with distilled water and ethanol, Then place it in an environment of 60° C. and dry for 12 hours; the homogeneous core-shell composite material PPyPANI is obtained.

[0041] The concentration of the hydrochloric acid solution in Step 2 of this embodiment is 0.1 mol / L.