Polyaniline microspheres and preparation method thereof
A polyaniline and microsphere technology, applied in the field of polymer materials, can solve the problems of small size of polyaniline, difficult to modify, limited application, etc., and achieve the effects of easy operation, mild conditions and pure system
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[0028] The invention provides a preparation method of polyaniline microspheres, comprising: irradiating aniline aqueous solution with gamma-rays to obtain polyaniline microspheres; the pH of the aniline aqueous solution is weakly acidic, neutral or alkaline.
[0029] Among them, the present invention has no special limitation on the sources of all raw materials, which can be commercially available.
[0030] The aniline aqueous solution is an aniline aqueous solution well-known to those skilled in the art, and there is no special limitation. In the present invention, it is preferred to dissolve the aniline monomer in a weakly acidic, neutral or alkaline aqueous solution, or dissolve the aniline monomer in water, and then adjust the pH value to obtain an aniline aqueous solution; the pH value of the aniline aqueous solution is preferably 6-13, more preferably 6.5-12, and more preferably 6.8-11; the aniline aqueous solution is preferably adjusted by sodium hydroxide aqueous soluti...
Embodiment 1
[0039] Use a pipette gun to measure 0.23mL aniline monomer, put it into a 50mL sample bottle, measure 25mL deionized water and add it to the sample bottle, after the aniline monomer is dissolved, add 3mol / L NaOH solution dropwise to adjust the pH of the system to 11. After purging nitrogen for 10 minutes, place the vial directly into the 60 In the Coγ-ray radiation source, the reaction solution was taken out after irradiating for 24 hours (the total absorbed dose was 57.6 kGy) at an absorbed dose rate of 40 Gy / min. The irradiated reaction solution was centrifuged with a CT15RT high-speed centrifuge (10000 rpm, 10 min), and the lower precipitate was collected and washed with deionized water. The above centrifugation and washing steps were repeated twice, and a solid powder product, polyaniline microspheres, was obtained after freeze-drying, with a yield of 74%.
[0040] Adopt infrared spectrum to analyze the polyaniline microsphere obtained in embodiment 1, obtain its FTIR infr...
Embodiment 2
[0043] Measure 0.23mL of aniline monomer with a pipette gun, put it into a 50mL sample bottle, measure 25mL of deionized water into the sample bottle, and wait for the aniline monomer to dissolve (system pH 6.8). After purging nitrogen for 10 minutes, place the vial directly into the 60 In the Coγ-ray radiation source, the reaction solution was taken out after irradiating for 24 hours (the total absorbed dose was 57.6 kGy) at an absorbed dose rate of 40 Gy / min. The irradiated reaction solution was centrifuged with a CT15RT high-speed centrifuge (10000 rpm, 10 min), and the lower precipitate was collected and washed with deionized water. The above centrifugation and washing steps were repeated twice, and a solid powder product, polyaniline microspheres, was obtained after freeze-drying, with a yield of 81%.
[0044] The polyaniline microsphere obtained in embodiment 2 is analyzed with infrared spectrum, obtains its FTIR infrared spectrogram as image 3 shown. Depend on ima...
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Abstract
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