A sulfonated polystyrene@mesoporous silica microsphere with egg yolk-shell structure and its preparation method

A technology of mesoporous silica and polystyrene microspheres, applied in chemical instruments and methods, chemical/physical processes, cation exchange materials, etc., can solve problems such as unsatisfactory effects, increased production costs, and low exchange capacity , to achieve the effect of mild conditions, cheap raw materials and high ion exchange efficiency

Active Publication Date: 2020-05-08
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the ion exchange resins currently on the market are polymer particles based on styrene / divinylbenzene copolymers or (meth)acrylic acid copolymers, and the purpose of exchange is achieved by modifying charged functional groups, but these The exchange capacity of the resin is relatively low, which will increase production costs, increase energy consumption, waste resources, and the effect is not particularly ideal

Method used

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  • A sulfonated polystyrene@mesoporous silica microsphere with egg yolk-shell structure and its preparation method
  • A sulfonated polystyrene@mesoporous silica microsphere with egg yolk-shell structure and its preparation method
  • A sulfonated polystyrene@mesoporous silica microsphere with egg yolk-shell structure and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] 1) Under the protection of nitrogen, add 0.6g PVP and 50mL deionized water to the container equipped with stirring magnet and condensing reflux device, stir, then continue to add 6.5mL St, heat up to 75°C, keep the temperature for 10min, add The aqueous solution dissolved with 0.15g KPS was reacted for 24 hours, and the product was centrifuged several times with absolute ethanol and deionized water, purified, and vacuum-dried to obtain monodisperse polystyrene microspheres as a milky white solid powder, which was set aside.

[0034]2) Add 0.2g of the above-mentioned monodisperse polystyrene microsphere milky white solid powder, 60mL of deionized water, 20mL of ethanol, 0.2g of CTAB, and 0.7mL of ammonia water into a three-neck flask, stir at 50°C for 30min, then add 0.5g of TEOS and stir for 2h , then add an aqueous phase solution containing 0.08g CTAB and 0.2mL ammonia water, stir for 30min, dissolve 480μL BTME in 2mL ethanol solution, then add to the above reaction sys...

Embodiment 2

[0037] 1) Under the protection of nitrogen, add 0.4g PVP and 70mL deionized water into the container equipped with stirring magnet and condensing reflux device, stir, then continue to add 5mL St, heat up to 70°C, keep the temperature for 12min, add the dissolved The aqueous solution of 0.2g KPS was reacted for 20h, and the product was centrifuged several times with absolute ethanol and deionized water, purified, and dried in vacuum to obtain monodisperse polystyrene microspheres, which were milky white solid powders, which were ready for use.

[0038] 2) Add 0.3g of the above-mentioned monodisperse polystyrene microsphere milky white solid powder, 40mL of deionized water, 30mL of ethanol, 0.1g of CTAB, and 0.9mL of ammonia water into a three-neck flask, stir at 40°C for 45min, then add 0.8g of TEOS and stir for 1h , then add an aqueous phase solution containing 0.05g CTAB and 0.4mL ammonia water, stir for 15min, dissolve 360μL BTME in 0.5mL ethanol solution, then add to the abo...

Embodiment 3

[0041] 1) Under the protection of nitrogen, add 0.8g of PVP and 30mL of deionized water into the container equipped with stirring magnet and condensing reflux device, stir, then continue to add 8mL of St, heat up to 80°C, keep the temperature for 8min, add the dissolved The aqueous solution of 0.1 g KPS was reacted for 26 hours, and the product was centrifuged several times with absolute ethanol and deionized water, purified, and vacuum-dried to obtain monodisperse polystyrene microspheres as a milky white solid powder, which was set aside.

[0042] 2) Add 0.1g of the above monodisperse polystyrene microsphere milky white solid powder, 80mL of deionized water, 10mL of ethanol, 0.3g of CTAB, and 0.5mL of ammonia water into a three-neck flask, stir at 60°C for 15min, then add 0.2g of TEOS and stir for 4h , then add an aqueous phase solution containing 0.11g CTAB and 0.1mL ammonia water, stir for 45min, dissolve 600μL BTME in 3.5mL ethanol solution, then add to the above reaction ...

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Abstract

The invention relates to a preparation method of a sulfonated polystyrene @ mesoporous silica microsphere with an egg yolk-shell structure. The preparation method mainly comprises the following stepsof: (1) using styrene (St) monomers as a raw material, and preparing a monodisperse polystyrene microsphere with a uniform particle size by adopting a soap-free emulsion polymerization method; (2) preparing a phenyl-functionalized polystyrene @ mesoporous silica microsphere with a yolk-shell structure; and (3) sulfonating the phenyl-functionalized polystyrene @ mesoporous silica microsphere by using chlorosulfonic acid to obtain ion exchange resin with a sulfonic acid group-modified polystyrene sphere kernel surface and a sulfonic acid group-modified silica shell surface. The synthesized polymer microsphere has a high specific surface area and a large pore volume, and has certain mechanical strength and chemical stability at the same time, the preparation method is simple, and has mild conditions and simple post-treatment, and the ion exchange efficiency of ion exchange resin can be improved.

Description

technical field [0001] The invention relates to an organic-inorganic hybrid ion exchange material, in particular to a sulfonated polystyrene@mesoporous silica microsphere with egg yolk-shell structure and a preparation method thereof. Background technique [0002] Yolk-shell nanostructures refer to a class of nanomaterials that present a core@void@shell configuration. This endows this material with broad application prospects in catalysis, microreactors, biosensors, water treatment, etc. Ion exchange is particularly important in water treatment processes. Ion exchange resin is a kind of polymer particles with charged functional groups. During water treatment, it can effectively recover heavy metal ions, remove charged organic substances in organic wastewater, and purify water. However, in the actual water treatment process, it is required that the ion exchange resin not only has stable performance, but also has a high exchange capacity. Most of the ion exchange resins cur...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J39/20B01J39/10
CPCB01J39/10B01J39/20
Inventor 戴李宗黄陈洪静鹿振武彭超华许一婷袁丛辉陈国荣曾碧榕罗伟昂
Owner XIAMEN UNIV
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