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, f

Method used

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  • Preparation of amphiphilic copolymer self-assembled micelle wedding agent

Examples

Experimental program
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Example Embodiment

[0030] Example 1

[0031] (1) Preparation of amphiphilic copolymer

[0032] Through radical precipitation polymerization, an amphiphilic copolymer poly(styrene-alt-maleic anhydride) with an alternating structure is synthesized. Weigh 2.08g (0.02mol) of styrene, 1.96g (0.02mol) of maleic anhydride, 0.020g (0.00012mol, 0.3% of the total molar amount of reacted monomers) as the initiator, in 28mL of toluene It was filled with nitrogen for 20 minutes, reacted at 65°C for 12h, filtered off the toluene, dissolved in 15mL dimethylformamide, precipitated in ether with 8 times the volume of dimethylformamide, filtered, and dried under vacuum 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 prepare a solution with a mass co...

Example Embodiment

[0037] Example 2

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

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

[0040] (3) Emulsion preparation

[0041] Take 3mL of the dispersing 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, homogenize at a speed of 15000 revolutions / min for 2 minutes to obtain an extremely stable Micro-emulsion, this type of polyelectrolyte can greatly improve the emulsification effect by adding small molecule electrolytes (such as sodium chloride).

Example Embodiment

[0042] Example 3

[0043] (1) Preparation of amphiphilic copolymer

[0044] Synthesize poly(maleic anhydride-co-styrene-co-(4-methyl-7-p-vinylbenzylideneoxycoumarin)) with the tendency of alternating polymerization. Weigh 2.352g (0.024mol) of maleic anhydride, 1.56g (0.015mol) of styrene, 1.33g (0.005mol) of 4-methyl-7-p-vinylbenzylideneoxycoumarin, and initiator azo Diisobutyronitrile 0.072g (0.00044mol, 1.0% based on the total molar amount of monomer) in 25mL dioxane, filled with nitrogen for 50 minutes, reacted at 65℃ for 8h, in methanol 8 times the volume of dioxane Precipitate in a mixed solvent of water / water (volume ratio 1:1), filter, and vacuum dry at 30°C. The product was dissolved in tetrahydrofuran, 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 t...

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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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