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Oximidated multi-lamellar polyimide microsphere adsorption material and preparation method thereof

A polyimide microsphere, polyimide technology, applied in chemical instruments and methods, adsorbed water/sewage treatment, inorganic chemistry, etc., to achieve the effects of high adsorption efficiency, broad application prospects, and high-efficiency uranium adsorption capacity

Active Publication Date: 2021-08-10
HARBIN ENG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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However, there is no report on the preparation of uranium ads

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  • Oximidated multi-lamellar polyimide microsphere adsorption material and preparation method thereof

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Embodiment 1

[0021] 1. Preparation process of multi-layer polyimide microspheres: 4 mmol DAAQ was dissolved in 16 mL N-methylpyrrolidone under nitrogen atmosphere. After magnetic stirring for 30 min, 4 mmol BTDA was added to the above solution in 6 times within 1 h for reaction, the reaction temperature was 20° C., and stirring was continued for 12 h. After the reaction was completed, it was transferred to a reactor for solvothermal reaction, the reaction temperature was 180° C., and the reaction time was 10 h. After the reaction, the solid matter was filtered, washed with deionized water and ethanol in sequence, and dried at 60° C. for 12 hours to prepare multi-layer polyimide microspheres.

[0022] 2. The preparation process of oximylated multi-lamellar polyimide microspheres: Disperse 0.1 g of multi-lamellar polyimide microspheres in 15 mL of a mixture of deionized water and ethanol with a volume ratio of 1:4, add 0.6g of hydroxylamine hydrochloride, ultrasonically dispersed for 30s; u...

Embodiment 2

[0026] 1. Preparation process of multi-layer polyimide microspheres: 4 mmol DAAQ was dissolved in 25 mL N-methylpyrrolidone under nitrogen atmosphere. After magnetic stirring for 30 min, 4 mmol BTDA was added to the above solution in 6 times within 1 h for reaction, the reaction temperature was 20° C., and stirring was continued for 12 h. After the reaction was completed, it was transferred to a reactor for solvothermal reaction, the reaction temperature was 180° C., and the reaction time was 12 hours. After the reaction, the solid matter was filtered, washed with deionized water and ethanol in sequence, and dried at 70° C. for 12 hours to prepare multi-layered polyimide microspheres.

[0027] 2. The preparation process of oximylated multi-lamellar polyimide microspheres: disperse 0.1 g of multi-lamellar polyimide microspheres in 13 mL of a mixture of deionized water and ethanol with a volume ratio of 1:4, add 0.7g of hydroxylamine hydrochloride, ultrasonically dispersed for ...

Embodiment 3

[0031] 1. Preparation process of multi-layer polyimide microspheres: 4 mmol DAAQ was dissolved in 10 mL N-methylpyrrolidone under nitrogen atmosphere. After magnetically stirring for 30 min, 4 mmol BTDA was added to the above solution in 6 times within 1 h for reaction. The reaction temperature was 18° C., and the stirring was continued for 12 h. After the reaction was completed, it was transferred to a reactor for solvothermal reaction, the reaction temperature was 180° C., and the reaction time was 12 hours. After the reaction, the solid matter was filtered, washed with deionized water and ethanol in sequence, and dried at 60° C. for 12 hours to prepare multi-layer polyimide microspheres.

[0032] 2. The preparation process of oximylated multi-lamellar polyimide microspheres: disperse 0.1 g of multi-lamellar polyimide microspheres in 10 mL of a mixture of deionized water and ethanol with a volume ratio of 1:4, add 0.6g of hydroxylamine hydrochloride, ultrasonically disperse...

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Abstract

The invention provides an oximidated multi-lamellar polyimide microsphere adsorption material and a preparation method thereof. The preparation method comprises the following steps: taking 2, 6-diamino-anthraquinone (DAAQ) and 3, 3', 4, 4'-benzophenonetetracarboxylic dianhydride (BTDA) as raw materials, and preparing a multi-lamellar polyimide microsphere through a solvothermal method; adopting hydroxylamine hydrochloride (NH2OH.HCl) to carry out oximidation modification treatment on the multi-lamellar polyimide microspheres, so the oximidation multi-lamellar polyimide microspheres are prepared. The prepared oximidated multi-lamellar polyimide microsphere adsorption material is stable in chemical property, has better adsorption performance, and particularly has efficient uranium adsorption capacity under a weak acid condition. The multi-lamella polyimide microsphere adsorption material and the preparation method thereof have the advantages of high adsorption efficiency, high adsorption rate, simple preparation steps, short period, low cost and the like, have wide application prospects, and particularly have obvious advantages in treatment of weakly acidic uranium-containing wastewater.

Description

technical field [0001] The invention belongs to the field of adsorption material preparation, and mainly relates to an oximylated multi-layer polyimide microsphere adsorption material and a preparation method thereof, in particular to an oximylated multi-layer polyimide microsphere with high-efficiency uranium adsorption capacity. Spherical adsorption material and its preparation method. Background technique [0002] The continuous progress and development of society put forward an urgent demand for low-carbon energy. As a low-carbon energy source, nuclear energy has been developed and utilized by countries all over the world. Uranium is an important element in the nuclear energy industry and is a high-efficiency nuclear energy fuel, but it is radioactive and toxic. If the uranium-containing wastewater produced by the nuclear energy industry is directly discharged into the natural environment without treatment, it can exist stably in the soil and water for a long time, pos...

Claims

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Application Information

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IPC IPC(8): B01J20/26B01J20/28B01J20/30C02F1/28
CPCB01J20/265B01J20/28021B01J20/28035C02F1/285C02F2101/006
Inventor 张春红朱立恩马福秋朱睿琪秦非凡刘立佳董红星
Owner HARBIN ENG UNIV
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