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Method for preparing solid particle emulsifier by compounding random copolymer with homopolymer

A technology of random copolymers and solid particles, applied in chemical instruments and methods, transportation and packaging, chemical/physical processes, etc., can solve the problems of uneven distribution, large particle size of micelles, unstable micelles, etc. The reaction conditions are easy to control, the preparation method is simple, and the conditions are mild.

Inactive Publication Date: 2014-12-31
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a method for self-assembling and preparing a solid particle emulsifier after mixing amphiphilic random copolymers with a higher content of hydrophilic monomers and homopolymers. It provides a simple and easy-to-control solution to the problem of unstable random copolymerized self-assembled micelles, and the micellar particle size is large and unevenly distributed.

Method used

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  • Method for preparing solid particle emulsifier by compounding random copolymer with homopolymer
  • Method for preparing solid particle emulsifier by compounding random copolymer with homopolymer

Examples

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Embodiment 1

[0018] (1) Preparation of amphiphilic random copolymer P(St-co-DM): Weigh 6.24g styrene (St) (30mmol) and 9.42g dimethylaminoethyl methacrylate (DM) (30mmol) respectively Add to a 50mL single-necked flask, add initiator AIBN (0.0783g, 0.5mmol), dissolve in 15mL of dioxane, fill with nitrogen, vacuumize, repeat 3 times to remove oxygen in the system, and react in an oil bath at 70°C 24h. After the reaction, use petroleum ether (30-60°C) as a precipitant, tetrahydrofuran (THF) as a solvent, dissolve and precipitate three times repeatedly, and finally dry in vacuum at 40°C to remove the solvent to obtain an amphiphilic random copolymer P (St-co-DM).

[0019] (2) Preparation of homopolymer PSt: Weigh 12.48g styrene and add it to a 100mL single-necked flask, add initiator AIBN (0.13g, 1mmol), dissolve in 30mL dioxane, fill with nitrogen, vacuumize, repeat 3 times Once, to remove the oxygen in the system, react in a 70°C oil bath for 24h. After the reaction, use petroleum ether (30...

Embodiment 2

[0023] (1) Prepare amphiphilic random copolymer P(St-co-AA) with 6.24g styrene and 4.32g acrylic acid, and prepare polystyrene with 12.48g styrene. Dissolve 100mg of amphiphilic random copolymer P(St-co-DM) and 25mg of homopolymer PSt in 10mL of co-solvent N,N-dimethylformamide self-assembly, and use self-assembly to obtain micellar particle emulsifier Make lotion.

[0024] (2) Refer to Example 1 for the specific preparation method.

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Abstract

The invention relates to a method for preparing a solid particle emulsifier by compounding a random copolymer with a homopolymer. The method comprises the following steps: 1, synthesizing an amphiphilic random copolymer; 2, synthesizing a hydrophobic homopolymer; and 3, respectively adding the amphiphilic random copolymer and the hydrophobic homopolymer into a cosolvent, adding a precipitation agent to self-assemble in order to form micelles with uniform size, and freezing the micelles in a large amount of deionized water. The particles of the assembled micelles prepared in the invention are stable, and have small particle size of 30-200[mu]m. The micelles have a good emulsifying effect as a particle emulsifier.

Description

technical field [0001] The invention belongs to the field of self-assembly of amphiphilic random copolymers, in particular to a method for preparing solid particle emulsifiers by self-assembly after mixing amphiphilic random copolymers and homopolymers. The solid particles prepared by the method are stable in aqueous solution and can be used as emulsifiers, belonging to the technical field of polymer materials. Background technique [0002] Copolymers with environmental responsiveness have attracted extensive attention of scientists in the past decade due to their special properties and potential application value in applications. Due to its size effect and surface and interface effect, amphiphilic copolymer self-assembled nanomaterials can produce special materials with different properties from conventional materials. Under different conditions, amphiphilic copolymers can self-assemble in selective solvents through hydrogen bonding, electrostatic interactions, hydrophilic...

Claims

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Application Information

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IPC IPC(8): C08G81/02C08F220/34C08F220/06C08F220/54C08F220/18C08F212/08C08F120/18C08F112/08B01F17/36B01F17/00C09K23/00C09K23/36
Inventor 陈美玲耿志鑫孙萌刘晓亚
Owner JIANGNAN UNIV
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