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Preparation of amphiphilic copolymer self-assembled micelle wedding agent

A copolymer and amphiphilic technology, which is applied in the field of preparation of amphiphilic copolymer self-assembled micelle emulsifiers, can solve the problems of difficult environmental responsiveness of particle emulsifiers, and achieve the effect of increasing the application range.

Inactive Publication Date: 2008-11-12
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But the former step involves many problems, such as dispersion, stabilization of nanoparticles, etc., and, most importantly, functionalization of the surface of the particles—making particle emulsifiers environmentally responsive is extremely difficult

Method used

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  • Preparation of amphiphilic copolymer self-assembled micelle wedding agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (1) Preparation of amphiphilic copolymer

[0032] An amphiphilic copolymer poly(styrene-alt-maleic anhydride) with alternating structure was synthesized by radical precipitation polymerization. Weigh styrene 2.08g (0.02mol), maleic anhydride 1.96g (0.02mol), initiator azobisisobutyronitrile 0.020g (0.00012mol, calculated by 0.3% of the total molar weight of the reaction monomer) in 28mL toluene , filled with nitrogen for 20 minutes, reacted at 65°C for 12h, filtered off the toluene, dissolved in 15mL of dimethylformamide, precipitated in ether 8 times the volume of dimethylformamide, filtered, and dried in vacuo at 30°C. The product was dissolved in dimethylformamide, precipitated, filtered and dried. Repeat the above steps three times to obtain a pure amphiphilic alternating copolymer.

[0033] (2) Preparation of amphiphilic copolymer micellar emulsifier

[0034] Dissolve the copolymer obtained in (1) in dimethylformamide to make a solution with a mass concentration...

Embodiment 2

[0038] (1) The preparation of amphiphilic copolymer is the same as Example 1.

[0039] (2) The preparation of amphiphilic copolymer micelle emulsifier is the same as Example 1.

[0040] (3) Emulsion preparation

[0041] Take 3mL of the dispersed emulsifier solution described in step (2), add sodium chloride and adjust its concentration in the micellar aqueous solution, and take an equal volume of toluene, and homogenize it for 2min at a speed of 15000 rpm to obtain extremely stable Microemulsions, such polyelectrolytes can greatly improve the emulsification effect by adding small molecule electrolytes (such as sodium chloride).

Embodiment 3

[0043] (1) Preparation of amphiphilic copolymer

[0044] Synthesis of poly(maleic anhydride-co-styrene-co-(4-methyl-7-p-vinylbenzylideneoxycoumarin)) with alternating polymerization propensity. Weigh maleic anhydride 2.352g (0.024mol), styrene 1.56g (0.015mol), 4-methyl-7-p-vinylbenzylideneoxycoumarin 1.33g (0.005mol), initiator azo Diisobutyronitrile 0.072g (0.00044mol, 1.0% of the total molar weight of monomers) in 25mL dioxane, filled with nitrogen for 50 minutes, reacted at 65°C for 8h, in methanol 8 times the volume of dioxane / water (volume ratio: 1:1) mixed solvent, filtered, and vacuum dried at 30°C. The product was dissolved in THF, precipitated, filtered and dried. Repeat the above steps three times to obtain a pure amphiphilic copolymer with alternating structure tendency.

[0045] (2) Preparation of amphiphilic copolymer micellar emulsifier

[0046] The obtained copolymer was dissolved in dioxane to form a solution with a mass concentration of 5%, and gradually...

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Abstract

The invention provides a method for preparing an amphiphilic copolymer self-assembly micelle emulsifying agent, belonging to the polymer material technical field. An amphiphilic copolymer is formed by copolymerization of a hydrophilic monomer and a hydrophobic monomer, or a plurality of hydrophilic monomers in different types, or a plurality of hydrophobic monomers in different types; the self assembly of an amphiphilic copolymer solution is made in a selective solvent, an amphiphilic copolymer micelle is obtained; the copolymer self-assembly micelle can be stably dispersed on the oil-water boundary to isolate the oil phase and the water phase, forming a stable emulsification disperse system. The grain diameter of the copolymer self-assembly micelle is in the micro-nano scale, so that the copolymer self-assembly micelle can be solely used as an emulsifying agent or jointly used together with other emulsifying agents.

Description

technical field [0001] The invention relates to a preparation method of an amphiphilic copolymer self-assembled micelle emulsifier, which synthesizes a polymer with special functionality through molecular design, and obtains an environment-responsive micelle through self-assembly, which can be used as an emulsifier and belongs to Polymer material technology field. Background technique [0002] Emulsifiers are widely used in food, pharmaceuticals, cosmetics, coatings, energy and other fields. However, most of the existing emulsifiers are small molecule surfactants, which have fatal flaws in the field of food safety and hygiene due to their instability and migration characteristics. In recent years, with the rapid development of nanotechnology, particle emulsifiers have gradually demonstrated their excellent performance, attracting more and more researchers' attention. [0003] As early as the beginning of the 20th century, Pickering realized that fine solid particles could ...

Claims

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Application Information

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IPC IPC(8): C08J3/02C08J3/12C08L25/08C08L35/00C08L33/14C08L25/00C08L33/02C08L33/24B01F17/52C09K23/52
Inventor 刘晓亚易成林江金强朱洁莲杨逸群宁超张永威刘铸李小杰
Owner JIANGNAN UNIV
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