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Amphiphilic block polymer nanoparticles with different morphologies and their preparation methods and applications

An amphiphilic block and nanoparticle technology, applied in the field of polymers, can solve problems such as complex processes, and achieve the effects of simple process, clear structure and shortened time.

Active Publication Date: 2022-07-12
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above method needs to be prepared through "two pots and two steps", and the process is complicated

Method used

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  • Amphiphilic block polymer nanoparticles with different morphologies and their preparation methods and applications
  • Amphiphilic block polymer nanoparticles with different morphologies and their preparation methods and applications
  • Amphiphilic block polymer nanoparticles with different morphologies and their preparation methods and applications

Examples

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preparation example Construction

[0036] The invention provides a preparation method of amphiphilic block polymer nanoparticles with different morphologies, comprising the following steps:

[0037] The stabilizing segment monomer, the nucleating segment monomer, the Lewis acid, the Lewis base and the aromatic solvent are mixed, and the obtained mixed reaction solution is subjected to a polymerization reaction to obtain amphiphilic block polymer nanoparticles with different morphologies.

[0038] In the present invention, unless otherwise specified, all raw material components are commercially available commodities well known to those skilled in the art.

[0039] In the present invention, the stable segment monomer is an acrylate monomer, preferably including dimethylaminoethyl acrylate (DMAEA), diethylaminoethyl acrylate (DEAEA), methyl acrylate (MA) ethyl acrylate (EA), butyl acrylate (BA), 2-methoxyethyl acrylate (MEA) or 2-ethylhexyl acrylate (2-EHA). In the present invention, the nucleating segment monome...

Embodiment 1

[0049] At room temperature, DMAEA and TFEMA were added to toluene at the same time, Lewis acid was added for premixing for 2 min, then Lewis base was added, and the obtained mixed reaction solution was subjected to polymerization reaction for 18 min to obtain an amphiphilic block polymer nanoparticle solution. After the morphology of the amphiphilic block polymer nanoparticles in the solution, n-hexane was added to the solution of the amphiphilic block polymer nanoparticles for quenching and then filtered. The obtained solid product was washed 3 times with n-hexane and then drained. , to obtain amphiphilic block polymer nanoparticles (denoted as PDMAEA 75 -b-PTFEMA 265 , where 75 and 265 represent the degree of polymerization), followed by subsequent characterization and testing.

[0050] Among them, Lewis base is Lewis acid as BHTAl i Bu 2 ; The solid content of the mixed reaction solution is 15%; the molar ratio of Lewis base: Lewis acid: DMAEA: TFEMA=1:2:75:265.

Embodiment 2～7

[0052] The amphiphilic block polymer nanoparticles were prepared according to the method of Example 1, and the preparation conditions were shown in Table 1:

[0053] Table 1 Preparation conditions of Examples 1 to 7

[0054]

[0055]

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Abstract

The invention provides amphiphilic block polymer nanoparticles with different morphologies, a preparation method and application thereof, and relates to the technical field of polymers. In the present invention, under the catalysis of Lewis acid-base pair, the acrylate monomer stabilizes the segment monomer and the nucleation segment monomer is polymerized to obtain amphiphilic block polymer nanoparticles with different morphologies; Nucleating segment monomers include trifluoroethyl methacrylate or benzyl methacrylate. The Lewis acid-base pair used in the invention can efficiently synthesize highly asymmetric amphiphilic block polymer nanoparticles with different morphologies through a "one-pot, one-step" method as a catalyst, and the polymer nanoparticles have a clear structure, and the monomers Less mis-insertion, good polymerization control and narrow molecular weight distribution. Amphiphilic block polymer nanoparticles with spherical, worm and vesicle morphologies can be obtained by controlling the dosage ratio of the two monomers.

Description

technical field [0001] The invention relates to the technical field of polymers, in particular to amphiphilic block polymer nanoparticles with different morphologies and a preparation method and application thereof. Background technique [0002] The self-assembly of amphiphilic block copolymers in solution is a powerful method to synthesize polymeric nanomaterials. Conventional solution self-assembly requires the first synthesis and purification of block polymers, followed by their dispersion in selective solvents. , using the selective solvent for the solubility difference of each block in the amphiphilic block polymer and the difference in the relative proportion of each block to obtain assemblies such as spheres and vesicles, but this method requires extremely low assembly concentration (<1%) and the complicated "polymer synthesis + post-polymerization assembly" process, these shortcomings greatly limit its practical application in industry. [0003] The emergence of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F297/00
CPCC08F297/00
Inventor 张越涛李城锴何江华
Owner JILIN UNIV
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