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Adjusting and controlling method for forming circular or rod-shaped micelles by block polymer solution through self assembly

A block polymer and self-assembly technology, applied in the field of macromolecular self-assembly, can solve problems such as complex technology and lack of shape control

Active Publication Date: 2012-06-13
天津渤化讯创科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the above-mentioned technologies are relatively complex and lack control over specific forms.

Method used

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  • Adjusting and controlling method for forming circular or rod-shaped micelles by block polymer solution through self assembly
  • Adjusting and controlling method for forming circular or rod-shaped micelles by block polymer solution through self assembly
  • Adjusting and controlling method for forming circular or rod-shaped micelles by block polymer solution through self assembly

Examples

Experimental program
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Effect test

Embodiment 1

[0026] At room temperature 20°C, PS-b-PEO was dissolved in toluene / ethanol (volume ratio 95:5), and the concentration of the polymer was 1000 mg / L. After complete dissolution, raise the temperature to 90°C, let it stand for 10 minutes, and then cool it to 25°C. After standing the solution at this temperature for 4 hours, it is confirmed by optical microscope and atomic force microscope that ring-shaped micelles are formed. Micellar structure. figure 1 It is an atomic force microscope image of the annular micelles obtained in Example 1. The micelles are regular ring structures with a diameter of about 300nm.

Embodiment 2

[0028] At room temperature 23°C, PS-b-PEO was dissolved in toluene / ethanol (volume ratio 90:10), and the concentration of the polymer was 1000 mg / L. After complete dissolution, the temperature was raised to 40°C and left for 10 minutes, then cooled to 18°C, and the solution was left at this temperature for 3 hours, and characterized by optical microscopy and atomic force microscopy, it was confirmed that ring-shaped micelles and rod-shaped micelles were formed. The diameter of the annular micelles is 400nm, the axial length of the rod-shaped micelles is 600-800nm, and the radial length is 100nm.

Embodiment 3

[0030] At room temperature 25°C, PS-b-PEO was dissolved in toluene / ethanol (volume ratio 95:5), and the concentration of the polymer was 2000mg / L. After complete dissolution, raise the temperature to 80°C, let it stand for 10 minutes, then cool it to 20°C, and let the solution stand at this temperature for 4 hours. After optical microscope and atomic force microscope characterization, it is confirmed that ring-shaped micelles are mainly formed. structure. The ring-shaped micelles have a diameter of 400 nm.

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Abstract

The invention discloses an adjusting and controlling method for forming circular or rod-shaped micelles by a block polymer solution through self assembly. The adjusting and controlling method comprises the steps of: dissolving block polymer polystyrene-b- polyoxyethylene (PS-b-PEO) in a solvent, dissolving an inorganic salt in another solvent, then mixing two solutions, heating to 40-90 DEG C, then cooling to room temperature and standing. According to the invention, micelles of different shapes can be prepared by adjusting the concentration of the polymer solution, the composition of the solvent and the ratio of the inorganic salt, thus nano structures of different limited conditions are obtained to meet different requirements.

Description

technical field [0001] The invention belongs to the field of self-assembly of macromolecules, and more specifically relates to a technology for self-assembly of block polymers in solution. Background technique [0002] Block copolymers can self-assemble into micelles of various shapes in selective solvents, such as spherical, rod-shaped, cyst-shaped, onion-shaped, disc-shaped, tubular, and ring-shaped micelles. Various forms of micelles have attractive application prospects in the fields of nanotechnology, biomedicine, bionics, surface modification and modification, especially in the field of biomedicine, such as drug delivery and release, targeted drug delivery, etc. drug carrier, etc. In recent years, ring and rod micelles have attracted more and more attention because of their unique confinement conditions and electrical, magnetic and optical properties, which have potential application value in the preparation of nanomaterials. For example, Jiang et al. reported the in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L53/00C08K5/098C08K3/30C08K3/24C08J3/09C08J3/215
Inventor 毛虎李景庆李宏飞蒋世春
Owner 天津渤化讯创科技有限公司
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