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Porous functional microcapsule, preparation method and application

A functionalized, microcapsule technology, applied in microcapsule preparations, microsphere preparation, chemical instruments and methods, etc., can solve the problems of waste of raw materials, time-consuming, many steps, etc., and achieve easier size control, simple preparation process, and low price. cheap effect

Inactive Publication Date: 2014-02-12
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this preparation method has many steps, is cumbersome, takes a long time, wastes raw materials, and the preparation process easily leads to the aggregation of particles and eventually forms aggregates of microcapsules. Therefore, its promotion and application are limited.

Method used

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  • Porous functional microcapsule, preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Example 1: Porous functionalized microcapsules of polyacrylamide-co-styrene-co-methyl methacrylate copolymer

[0023] (1) Mix 85.7g of deionized water, 5mg of sodium polyacrylate, and 14.3g of porous calcium carbonate filter cake with a solid content of 35wt%, and fully disperse them to make a porous calcium carbonate water suspension with a solid content of 5wt% and good dispersibility liquid, spare;

[0024] (2) Stir the aqueous suspension of porous inorganic particles prepared in step (1) under nitrogen gas, control the speed at 300 r / min, add 5 g of acrylamide, raise the temperature to 60°, stir for 1 hour, and then add azobisiso Butyamidine hydrochloride 40mg and start timing, and dropwise add styrene 3g and methyl methacrylate 2g therein within 0.5h, keep warm at 60 ° of reaction 4h after dropwise addition, vacuum suction filter after the reaction solution is cooled, get filter cake for use;

[0025] (3) Add 0.1N hydrochloric acid solution dropwise to the filter...

Embodiment 2

[0026] Example 2: Porous functionalized microcapsules of polyacrylamide-co-dimethyldiallylammonium chloride-co-methyl methacrylate copolymer

[0027] (1) Mix 33.3g of deionized water, 60mg of sodium hexametaphosphate, and 66.7g of porous calcium carbonate filter cake with a solid content (that is, inorganic powder) of 30wt%, and fully disperse it to make a solid content of 20wt with good dispersion performance. % porous calcium carbonate aqueous suspension, set aside. In this embodiment, 66.7g solid content is that the pure calcium carbonate contained in the filter cake of 30wt% is 66.7g * 30%=20g, and water should be 66.7g-20g=44.7g, then the total amount of water in the system is 44.7+33.3=80g, at this time the ratio of deionized water: sodium hexametaphosphate: porous calcium carbonate should be 4:0.003:1.

[0028] (2) Stir the aqueous suspension of porous inorganic particles prepared in step (1) under nitrogen, control the speed at 1000 r / min, add 15 g of acrylamide and 5...

Embodiment 3

[0030] Example 3: Porous functionalized microcapsules of poly-N-isopropylacrylamide-co-dimethyldiallylammonium chloride-co-methyl methacrylate copolymer

[0031] (1) Mix 92g of deionized water, 80mg of sodium silicate, and 8g of porous aerosol silica, and fully disperse to prepare a porous aerosol silica aqueous suspension with a solid content of 8wt% and good dispersibility, and set aside;

[0032] (2) Stir the aqueous suspension of porous inorganic particles prepared in step (1) under nitrogen, control the speed at 600 r / min, add 6 g of N-isopropylacrylamide and dimethyl diallyl chloride Ammonium 2g, heat up to 40 °, after stirring for 1h, add 0.16g of azobisisobutylimidazoline hydrochloride and start timing, and add 16g of methyl methacrylate dropwise to it within 0.5h, keep the temperature after the dropwise addition React at 50° for 12 hours, vacuum filter after the reaction solution is cooled, and obtain a filter cake for later use;

[0033](3) Add 0.1N hydrofluoric aci...

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Abstract

The invention discloses a porous functional microcapsule, a preparation method and application. The porous functional microcapsule, taking porous inorganic microparticles as a template, is prepared from various monomers which are taken as wall material raw materials through mixing the template and the wall material raw materials, implementing in situ polymerization and removing the template. The microcapsule, due to thick capsule wall and many active groups, has the characteristics of being easy for loading of functional materials, and controllable and adjustable in release of the functional materials.

Description

technical field [0001] The invention relates to a microcapsule and a preparation method thereof, in particular to a microcapsule and a preparation method thereof, and belongs to the field of preparation of functionalized microcapsules. Background technique [0002] The preparation technology of microcapsules originated in the 1950s and developed rapidly in the following decades. During this time many microencapsulated products and processes emerged. Since the first microencapsulated product, carbonless copy paper, was developed in 1954, many functional microcapsule technologies have been widely used in the fields of food, medicine, textile dyeing and finishing, catalysts, liquid crystal display, bioengineering and tissue engineering. [0003] Microcapsules are substances that separate the space inside the capsule from the space outside the capsule to form a specific geometric structure by a film-forming substance. The shape of the microcapsules is mainly spherical, and can...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J13/18B01J20/26B01J20/28C08F220/56C08F212/08C08F220/14C08F226/02C08F220/54C08F220/34C08J9/26
Inventor 肖惠宁潘远凤
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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