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Preparation method of polystyrene microspheres with casein supported on surface

A technology of polystyrene microspheres and surface loading, which is applied in the preparation of microspheres and microcapsule preparations, and can solve the problems of desorption, limited adsorption capacity, troublesome use of microspheres, etc.

Inactive Publication Date: 2014-10-08
IANGSU COLLEGE OF ENG & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Due to the relatively weak van der Waals attraction between molecules, it is not reliable to rely solely on physical adsorption, and there are certain restrictions on the control of the surface adsorption amount of microspheres. The main performance is that the adsorption amount is very limited and desorption will occur during storage, transportation and use. Attached, it brings a lot of trouble to the use of microspheres

Method used

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  • Preparation method of polystyrene microspheres with casein supported on surface
  • Preparation method of polystyrene microspheres with casein supported on surface
  • Preparation method of polystyrene microspheres with casein supported on surface

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Embodiment

[0028] A method for preparing polystyrene microspheres loaded with casein on the surface includes the following steps:

[0029] (1) Add 1.5g casein and 0.05g sodium carbonate to 50ml deionized water, dissolve at 50℃ under stirring, adjust the pH of the solution to 7.8 with 0.1M hydrochloric acid;

[0030] (2) Dissolve 0.1g of benzoyl peroxide (BPO) in a mixture of 11.4g of styrene and 0.6g of divinylbenzene;

[0031] (3) Put the above two components into a three-necked flask with stirring, and stir for 20 minutes to form an O / W white emulsion;

[0032] (4) Slowly raise the temperature to 72°C to carry out the polymerization reaction. The reaction time is 5 hours. During the reaction, the monomer droplets gradually become solid microspheres and partially encapsulate the hydrophobic segments of casein embedded on the surface to realize the loading of macromolecules;

[0033] (5) After the reaction, the microspheres are filtered or centrifuged, washed with deionized water for three times, ...

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Abstract

The invention discloses a preparation method of polystyrene microspheres with casein supported on the surface. The preparation method comprises the following steps: dissolving a casein aqueous solution under an alkalescent condition, preparing the aqueous solution and regulating the pH value of the aqueous solution; adding a little of comonomer divinyl benzene into styrene monomer, adding a proper amount of polymerization initiator and dissolving; adding a proper quantity of two components prepared in advance into a polymerization device, mixing at certain mixing speed and emulsifying uniformly; heating the emulsion till the emulsion reaches reaction temperature, performing polymerization reaction, filtering, washing and drying to obtain the microspheres. Casein macromolecules are inlaid in the surface of the microspheres by the technical method, and the supporting capacity of the surface of the microspheres can be controllably adjusted in a process ratio and through the change of polymerization conditions.

Description

Technical field [0001] The invention relates to the field of polymer materials, in particular to a method for preparing functional polymer microspheres with casein on the surface. Background technique [0002] Since its introduction, polymer microspheres have been attracting the attention of many researchers. They have been widely used in many scientific research and industrial manufacturing fields, especially in life sciences and pharmaceutical manufacturing. Polymer microspheres play an increasingly important role. character of. In recent years, the introduction of functional groups (such as hydrophilic hydroxyl, carboxyl and aldehyde groups, etc.) on the surface of polymer microspheres to change the surface properties or introduce some new functions has attracted wide attention from researchers. [0003] At present, the functionalization of polymer microspheres mainly adopts the technical route of copolymerization, that is, the copolymerization of different polymerized monomers...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J13/14C08F212/08C08F212/36C08F2/18
Inventor 艾亚菲杨晓红张炜栋夏婷婷
Owner IANGSU COLLEGE OF ENG & TECH
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