Preparation method and application of nano-sulfonated polystyrene microspheres

A technology of sulfonated polystyrene and polystyrene microspheres, applied in chemical instruments and methods, inorganic chemistry, alkali metal compounds, etc., can solve the problems of slow adsorption speed, small exchange capacity, limited effect, etc., and achieve processing speed Fast, large capacity, high sulfonation effect

Inactive Publication Date: 2017-12-22
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, heavy metals in drinking water are mainly treated by millimeter-level activated carbon, ion exchange resin and other methods, which have problems such as slow adsorption speed, small exchange capacity and limited effect.

Method used

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  • Preparation method and application of nano-sulfonated polystyrene microspheres
  • Preparation method and application of nano-sulfonated polystyrene microspheres
  • Preparation method and application of nano-sulfonated polystyrene microspheres

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) Take 0.1g SDS, 0.05g Na 2 CO 3 Dissolve in a three-necked flask filled with 150mL of distilled water, stir, fill with nitrogen for 30min, add 15mL of styrene and raise the temperature to 60°C, stir and mix for 30min. Add 7.5mL of hot solution containing 0.031g of potassium persulfate, mix well, react at 72°C and 300r / min for 20h, wash the solid product with absolute ethanol and water alternately for several times, and dry it in vacuum at 60°C for 12h. The powdered milky white nano-sized polystyrene microspheres were obtained.

[0031] (2) Add PS into concentrated sulfuric acid according to the ratio of PS microspheres to concentrated sulfuric acid: 1:40g / mL, and react for 3 hours at 28°C under magnetic stirring. It was vacuum dried at ℃ for 12 hours to obtain nano-sized sulfonated polystyrene microspheres.

[0032] Gained nanoscale polystyrene microspheres and nanoscale sulfonated polystyrene microspheres were tested by scanning electron microscope respectively, ...

Embodiment 2

[0034] (1) Take 0.15g SDS, 0.05g Na 2 CO 3 Dissolve in a three-necked flask filled with 150mL of distilled water, stir, fill with nitrogen for 30min, add 15mL of styrene and raise the temperature to 60°C, stir and mix for 30min. Add 7.5mL hot solution containing 0.080g potassium persulfate, mix well, react at 72°C and 300r / min for 18h, wash the solid product with absolute ethanol and water alternately for several times, and dry it in vacuum at 60°C for 12h. The powdered milky white nano-sized polystyrene microspheres were obtained.

[0035] (2) Add PS into concentrated sulfuric acid according to the ratio of PS microspheres to concentrated sulfuric acid: 1:30g / mL, and react for 4 hours at 20°C under magnetic stirring. It was vacuum dried at ℃ for 12 hours to obtain nano-sized sulfonated polystyrene microspheres.

Embodiment 3

[0037] (1) Take 0.12g SDS, 0.05g Na 2 CO 3 Dissolve in a three-necked flask filled with 150mL of distilled water, stir, fill with nitrogen for 30min, add 15mL of styrene and raise the temperature to 60°C, stir and mix for 30min. Add 7.5mL hot solution containing 0.080g potassium persulfate, mix well, react at 68°C and 300r / min for 24h, wash the solid product with absolute ethanol and water alternately several times, and dry it in vacuum at 60°C for 12h. The powdered milky white nano-sized polystyrene microspheres were obtained.

[0038] (2) Add PS into concentrated sulfuric acid according to the ratio of PS microspheres to concentrated sulfuric acid: 1:40g / mL, and react for 3 hours at 25°C under magnetic stirring. It was vacuum dried at ℃ for 12 hours to obtain nano-sized sulfonated polystyrene microspheres.

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Abstract

The invention belongs to the technical field of nano-adsorption materials and discloses a preparation method and an application of nano-sulfonated polystyrene microspheres. The preparation method comprises the steps of: adding a styrene monomer, an emulsifier, a buffer agent and an initiator to water, heating the mixture to 68-78 DEG C and performing a reaction for 15-24 h, and washing and drying a solid product to prepare nano polystyrene microspheres; and adding the nano polystyrene microspheres to concentrated sulfuric acid, performing a sulfonation reaction at 20-50 DEG C for 0.5-12 h, and washing and drying a reaction product to obtain the nano-sulfonated polystyrene microspheres. In the method, a sulfonic group is introduced to the surfaces of the polystyrene microspheres so as to prepare the nano-sulfonated polystyrene microspheres. The microspheres have uniform particle size, allows nano-scale self-assembly to form an orderly-arranged array, has high adsorption capacity to heavy metal ions in water, and is high in processing speed.

Description

technical field [0001] The invention belongs to the technical field of nano-adsorption materials, and in particular relates to a preparation method and application of nano-scale sulfonated polystyrene microspheres. Background technique [0002] Among many nanomaterials, polystyrene microspheres have attracted much attention due to their high rigidity, high mechanical strength, acid and alkali resistance, and stable chemical properties. Among them, the raw material styrene is rich in resources and low in price, and polystyrene microspheres have properties such as large specific surface area, uniform particle size and controllability. The preparation methods of polystyrene microspheres are generally divided into dispersion polymerization, seed polymerization, and emulsion polymerization. Among them, the preparation of polystyrene microspheres by seed polymerization is cumbersome and requires secondary swelling. However, the polystyrene prepared by this method The particle siz...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F112/08C08F2/26C08F8/36B01J20/28B01J20/26C02F1/28C02F101/10C02F101/20
CPCB01J20/261B01J20/28007B01J20/28021C02F1/285C02F2101/10C02F2101/103C02F2101/20C08F2/26C08F8/36C08F112/08
Inventor 肖凯军彭尧天龚斌董浩何家鹏
Owner SOUTH CHINA UNIV OF TECH
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