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A kind of nanowire polymer micelle and preparation method thereof

A polymer glue and polymer technology, applied in the field of nanowire polymer micelles and their preparation, can solve the problems of difficult parameter control, many influencing factors, low cost, etc., and achieve simple operation, simple process and large load capacity. Effect

Active Publication Date: 2020-05-12
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Electrospinning method is the most commonly used method to prepare nanofibers, but it has many influencing factors and parameters are difficult to control; template synthesis method can solve the problems of particle size, shape control and dispersion stability at the same time; self-assembly method is the most promising method. One of the technologies for preparing micro-nano materials, which has the advantages of low cost and easy scale-up

Method used

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  • A kind of nanowire polymer micelle and preparation method thereof
  • A kind of nanowire polymer micelle and preparation method thereof
  • A kind of nanowire polymer micelle and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The preparation method of the nanowire polymer micelle of the present embodiment comprises the following steps:

[0033] Carry out the synthesis of the macromolecular initiator of polyethylene glycol modified by RAFT reagent before experiment, specifically as follows: Get RAFT reagent DDMAT (3.65g, 10.0mmol) to be dissolved in 30mL methylene dichloride DCM, to wherein slowly dropwise 8.5mL oxalyl chloride (COCl) 2 (100.0mmol), reacted at room temperature for 2h; after the reaction ended, excess (COCl) was removed by rotary evaporation 2 ; Finally, add 2g polyethylene glycol PEG in above-mentioned reactant, after room temperature reaction 24h, precipitate in n-hexane and obtain the polyethylene glycol macromolecular initiator PEG-CTA that RAFT reagent is modified, also be referred to as PEO 44 -CTA, the synthetic chemical formula is as follows:

[0034]

[0035] 1. Synthesis of block polymers

[0036] In a clean Schlenk reaction flask with a magnetic stirrer, add t...

Embodiment 2

[0044] Step 3 in Example 1: adding 0.1 mL of NaCl solution with a concentration of 0.04 mol / L to the initial micellar solution; in this step, replace the NaCl solution with potassium bromide solution of the same concentration, and implement the same for other steps Example 1 is the same; the polymer micelles prepared in this example become vesicles with a diameter of about 360nm and a wall thickness of about 50nm, such as image 3 shown.

Embodiment 3

[0046] Step 3 in Example 1: Adding 0.1 mL of NaCl solution with a concentration of 0.04 mol / L to the initial micellar solution; in this step, replace the NaCl solution with potassium iodide solution of the same concentration, and the other steps are the same as in Example 1 Identical; The polymer micelle form that present embodiment makes becomes worm-like micelle, as Figure 4 shown.

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Abstract

The invention relates to a preparation method of a nanowire polymer micelle. The preparation method comprises following steps: a RAFT reagent modified polyethylene glycol large-molecular initiator, styrene, 1-(chloromethyl)-4-ethenylbenzene, tetrahydrofuran, and azodiisobutyronitrile are introduced into a reaction bottle successively, an obtained mixture is subjected to a plurality of times of liquid nitrogen cooling, vacuum pumping, nitrogen filling, and unfreezing circulation, and is subjected to reaction in oil bath at nitrogen atmosphere, after reaction, an obtained product is added into liquid nitrogen to stop reaction, and deposition is carried out; dissolving and deposition operation is repeated for a plurality of times, and filtering is carried out so as to obtain a double block polymer; the double block polymer and 4-methyl-dipyridyl is introduced into a reaction bottle, DMF is added at nitrogen atmosphere for reaction, an obtained reaction product is subjected to dialysis, after dialysis, freeze drying is carried out so as to obtain an ionic amphiphilic block polymer; the ionic amphiphilic block polymer is dissolved in a good solvent, ultrapure water is added drop by dropat a preset speed so as to obtain an initial micelle solution; a chloride ion containing solution is added drop by drop, and stirring is carried out so as to obtain the nanowire polymer micelle. Thepreparation method is simple and rapid.

Description

technical field [0001] The invention belongs to the technical field of polymer material synthesis, and in particular relates to a nanowire polymer micelle and a preparation method thereof. Background technique [0002] Amphiphilic block copolymers are composed of two blocks, a hydrophilic segment and a hydrophobic segment, and have the characteristics of micellization and microphase separation; therefore, they have the properties of bulk phase, solution, film and air / liquid interface. Very rich self-assembly behavior. Polymer micelles are a kind of nanoparticles formed spontaneously by amphiphilic block copolymers in aqueous solution above the critical micelle concentration. Polymer molecules can form spherical micelles, rod micelles, and disc micelles in solution. Aggregates such as vesicles and nanotubes; micelle arrays will be formed in spin-coated films and dip-coated films, or columnar or strip structures arranged in parallel or vertically through microphase separation...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F8/30C08F293/00C08F212/08C08F212/14C08J3/09C08L53/00
CPCC08F8/30C08F212/08C08F212/14C08F293/005C08J3/095C08J2353/00
Inventor 童再再钟佳幸周峻毅唐秋菊江国华
Owner ZHEJIANG SCI-TECH UNIV