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Preparation method of submicron carboxyl functionalized polystyrene microspheres

A polystyrene microsphere and carboxyl functionalization technology, which is applied in the preparation of microspheres and microcapsule preparations, can solve the problems of unsuitable ideal template raw materials and small particle size of polystyrene microspheres, and achieve high sphericity, Synthetic conditions are mild, the operation is simple and easy to repeat the effect

Pending Publication Date: 2022-07-22
CHINA CATALYST HLDG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patented process allows creating small particles with specific sizes that are easy to handle during manufacturing processes. These tiny particles also exhibit excellent properties such as being dispersed well even when mixed into water or other solvents like ethanol. They may then serve as templates for making porous material through chemical reactions on them.

Problems solved by technology

This patented describes various techniques that make use of special chemicals called surfactants or amphitropic agents (also known collectively as solvent) during the process of creation of these types of microparticles. These processes aim to control how well they behave when introduced into solutions like biological fluids such as bloodstreams. However, current methods require expensive equipment and complicated procedures, resulting in low yields and poor quality products.

Method used

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  • Preparation method of submicron carboxyl functionalized polystyrene microspheres
  • Preparation method of submicron carboxyl functionalized polystyrene microspheres
  • Preparation method of submicron carboxyl functionalized polystyrene microspheres

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Embodiment 1

[0035] A preparation method of submicron carboxyl functionalized polystyrene microspheres, comprising the following steps:

[0036] (1) 20g of styrene was added to the four-hole glass kettle, and nitrogen was bubbled for 10min under the standing state;

[0037] (2) in step (1), add 200g deionized water, and turn on stirring, continue to feed nitrogen 30min, obtain the styrene solution that concentration is 0.96mol / L;

[0038] (3) add 1.20g methacrylic acid to step (2), then add 0.30g sodium dodecyl sulfonate and 0.03g n-butanol, stir until dissolved, and raise the reaction temperature to 50 ° C;

[0039] (4) adding 0.20g potassium persulfate and 0.2g polyvinyl alcohol to step (3), and making the reaction solution react at 75°C for 5h;

[0040] (5) The emulsion in step (4) was centrifuged and washed three times with ethanol, and then dried at 50° C. to obtain submicron carboxyl-functionalized polystyrene spheres.

[0041] see figure 1 , 1# submicron carboxyl functionalized p...

Embodiment 2

[0043] A preparation method of submicron carboxyl functionalized polystyrene microspheres, comprising the following steps:

[0044] (1) 20g of styrene was added to the four-hole glass kettle, and nitrogen was bubbled for 10min under the standing state;

[0045] (2) in step (1), add 200g deionized water, and turn on stirring, continue to feed nitrogen 30min, obtain the styrene solution that concentration is 0.96mol / L;

[0046] (3) add 1.20g methacrylic acid to step (2), then add 0.30g sodium dodecyl sulfonate and 0.03g n-butanol, stir until dissolved, and raise the reaction temperature to 50 ° C;

[0047] (4) adding 0.30g potassium persulfate and 0.2g polyvinyl alcohol to step (3), and making the reaction solution react at 75°C for 5h;

[0048] (5) The emulsion in step (4) was centrifuged and washed three times with ethanol, and then dried at 50° C. to obtain submicron carboxyl-functionalized polystyrene spheres.

[0049] see figure 2 , 2# submicron carboxyl-functionalized ...

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Abstract

The invention discloses a preparation method of submicron carboxyl-functionalized polystyrene microspheres, which mainly comprises the following steps: uniformly mixing a styrene monomer without a flame retardant with deionized water, then mixing with methacrylic acid, an emulsifier, a co-emulsion and a dispersant, finally adding an initiator at 30-60 DEG C, and reacting at 60-90 DEG C for 2-12 hours to obtain the submicron carboxyl-functionalized polystyrene microspheres. A nitrogen environment is kept in the whole experiment process, and the obtained emulsion is washed with ethanol and dried to prepare the submicron carboxyl functionalized polystyrene microspheres. The microspheres prepared by the method have the characteristics of uniform size, high sphericity, mild synthesis conditions, simplicity in operation, easiness in repetition and the like, and have great application potential in preparation of porous materials.

Description

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Claims

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Application Information

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Owner CHINA CATALYST HLDG CO LTD
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