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Preparation method of composite microsphere having "crunchy rice candy" like structure, the prepared composite microsphere, and application thereof

A technology of composite microspheres and rice cracker candy, which is applied in the direction of microsphere preparation, microcapsule preparation, chemical instruments and methods, etc., and can solve the problems of difficult separation, strong adsorption, and easy agglomeration

Inactive Publication Date: 2020-03-10
赵晓宁
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, due to the small particle size and strong adsorption of core-shell nanospheres, they are easy to agglomerate and difficult to separate in practical applications.

Method used

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  • Preparation method of composite microsphere having "crunchy rice candy" like structure, the prepared composite microsphere, and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1) Take 100mL deionized water and place it in a 250mL three-neck round bottom flask, blow nitrogen gas for 30min, and add (0.010g azobisisobutyronitrile + 1.00mL monomeric styrene + 0.1 mL methacrylic acid at a constant temperature of 70°C ); (2) Use a pipette to accurately pipette the prepared mixture of 10mL of 5% polyvinyl alcohol, 0.2g of azobisisobutyronitrile, 10mL of styrene and 1g of methacrylic acid into a three-necked bottle and keep it at 400rpm Adjust and control the stirring speed to disperse the liquid droplets into oil droplets of appropriate size, heat-preserve at 70°C for about 24hours, and then undergo centrifugation and washing to obtain the polymer composite microspheres of "rice flower candy".

Embodiment 2

[0023] (1) Take 100mL of deionized water and place it in a 250mL three-neck round bottom flask, blow nitrogen gas for 30min, and add 0.01g of treated Fe at a constant temperature of 70°C 3 o 4 and (0.010g azobisisobutyronitrile + 1.00mL monomeric styrene + 0.1 mL methacrylic acid); (2) Use a pipette to accurately pipette 10mL of prepared 5% polyvinyl alcohol, 0.2g azobis The mixture of isobutyronitrile, 10mL styrene and 1g methacrylic acid was poured into three ports, kept at 70°C for about 24hours, and then centrifuged and washed to obtain magnetic composite microspheres of "rice cracker candy".

Embodiment 3

[0025] (1) Take 100mL of deionized water and place it in a 250mL three-neck round bottom flask, blow nitrogen gas for 30min, and add 0.01g of treated Fe at a constant temperature of 70°C 3 o 4 and (0.010g azobisisobutyronitrile + 1.00mL monomeric styrene + 0.1 mL methacrylic acid); (2) Use a pipette to accurately pipette 10mL of prepared 5% polyvinyl alcohol, 0.2g azobis Pour the mixture of isobutyronitrile, 10mL styrene, 1mL divinylbenzene and 1g methacrylic acid into a three-necked flask, keep 400rpm, adjust and control the stirring speed to disperse the droplets into oil droplets of appropriate size, and keep warm at 70°C for about 24hours. Then through centrifugation and washing, magnetic cross-linked composite microspheres with magnetic "popcorn candy" are obtained.

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Abstract

A synthesis method of a composite microsphere having a "crunchy rice candy" like structure includes steps of: 1) preparing nano or submicron microspheres which may be pure high-molecular microspheresor high-molecular inorganic composite microspheres; 2) on the basis of the prepared microspheres, adding other agents to perform further high-molecular polymerization reaction and hydrolysis reactionto achieve crosslinking of the microspheres, thereby forming a larger "crunchy rice candy" like crosslinked microsphere. The synthesized microspheres have excellent physical and chemical characteristics of small microspheres, such as high specific surface area, a large quantity of active sites and activity accumulation effect, so that the total quantity of the active sites is far larger than thatof single small microsphere. The product has wide application prospect in the fields such as biology, synthesis, separation and the like.

Description

technical field [0001] The invention belongs to the technical field of preparation technology of high-performance composite microspheres, and in particular relates to a preparation method of composite microspheres with a specific "rice cracker candy" structure. Background technique [0002] Nanomaterials refer to materials whose microstructure belongs to nanoscale (1-100nm) in at least one dimension, among which nanospheres are materials with nanoscale in three dimensions, which have physical and chemical properties that traditional materials do not have. . The most widely used type of nano-microspheres is the nano-microspheres with a core-shell structure. Such microspheres generally have a skeleton structure composed of hydrophobic substances, which can wrap and protect core materials such as magnetism from chemical erosion by the external environment. The shell of core-shell nanospheres generally has a hydrophilic structure, and after introducing different surface groups,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J13/14G01N33/52C08F212/08C08F220/06C08F212/36C08F2/18C08F2/20C08F2/44C08K9/00C08K3/22C09K11/06
CPCB01J13/14C08F2/18C08F2/20C08F2/44C08F212/08C08K3/22C08K9/00C08K2003/2275C08K2201/01C09K11/06G01N33/52C08F220/06C08F212/36
Inventor 赵晓宁
Owner 赵晓宁
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