Homopolymer nanoparticles by self-emulsion polymerization reaction and preparation method thereof

Patent metadata

Field	Value
Publication number	US-10093752-B2
Application number	US-201414304265-A
Country	US
Kind code	B2
Filing date	Jun 13, 2014
Priority date	Jun 13, 2013
Publication date	Oct 9, 2018
Grant date	Oct 9, 2018

Abstract

Disclosed herein is a preparation method of homopolymer nanoparticles without using a surfactant. The homopolymer nanoparticles prepared thereby are expected to be widely used not only as a template of a semiconductor metal oxide, a drug delivery system (DDS), an electron transport layer (ETL), and a seed having vertical structural shape, but also in a high precision field such as replacement of an organic device polystyrene bead film.

First claim

What is claimed is:

1. A preparation method of homopolymer nanoparticles comprising:
(i) preparing a deoxygenated mixture of water and an amphiphilic monomer selected from the group consisting of vinylpyridine, 4-vinylpyridine, acrylic acid, methacrylic acid, styrene sulfonic acid, 4-styrene sulfonic acid, 2-hydroxyethyl methacrylate, hydroxypropyl methacrylate, hydroxybutyl methacrylate, methacrylamide, n-vinylpyrrolidone, acrylonitrile, 4-(4-vinylphenyl)pyridine, and 6-vinylpyridine-3-carbonitrile;
(ii) adding a hydrophilic initiator to said mixture to initiate a surfactant-free polymerization reaction of amphiphilic monomers;
(iii) carrying out the surfactant-free polymerization reaction at constant temperature ranging from 55° C. to 95° C. for 50-160 minutes to form the homopolymer nanoparticles.

2. The preparation method of homopolymer nanoparticles of claim 1 , wherein the homopolymer is represented by one of the following Chemical Formulae 1-7:

wherein n is an integer of 10 to 10,000.

3. The preparation method of homopolymer nanoparticles of claim 1 , wherein the hydrophilic initiator is at least one selected from the group consisting of 2,2′-azobis[2-(2-imidazolin-2-yl)propane]dihydrochloride, 4,4-azobis(4-cyanovaleric acid), ammonium persulfate, potassium persulfate, sodium persulfate, ammonium bisulfate, sodium bisulfate and 1,1-azobis(1-methylbutyronitrile-3-sodium sulfonate).

4. Homopolymer nanoparticles comprising a homopolymer represented by one of the following Chemical Formulae 1-7:

wherein n is an integer of 10 to 10,000; and
wherein said nanoparticles consist of 2-1,000 homopolymers; have a spherical shape having a diameter of 1-800 nm; and have a shell composed of hydrophilic pendants of said homopolymers and an inner layer composed of 70-95 vol % of hydrophobic main chains of said homopolymers and 5-30 vol % of hydrophilic pendants of said homopolymers.

5. The homopolymer nanoparticles of claim 4 prepared by the preparation method of claim 1 .

6. A drug delivery material comprising the homopolymer nanoparticles of claim 4 and a pharmaceutical active material collected in the inner layer of the homopolymer nanoparticles.

7. A preparation method of homopolymer nanoparticles comprising:
(i) preparing a deoxygenated mixture of water and an amphiphilic monomer selected from the group consisting of vinylpyridine, 4-vinylpyridine, acrylic acid, methacrylic acid, styrene sulfonic acid, 4-styrene sulfonic acid, 2-hydroxyethyl methacrylate, hydroxypropyl methacrylate, hydroxybutyl methacrylate, methacrylamide, n-vinylpyrrolidone, acrylonitrile, 4-(4-vinylphenyl)pyridine, and 6-vinylpyridine-3-carbonitrile;
(ii) adding a hydrophilic initiator to said mixture to initiate a surfactant-free polymerization reaction of amphiphilic monomers;
(iii) carrying out a surfactant-free polymerization reaction at constant temperature ranging from 55° C. to 95° C. for 50-160 minutes to form the homopolymer nanoparticles;
(iv) swelling the homopolymer nanoparticles and collecting a pharmaceutical active material in an inner layer of said nanoparticles.

8. The preparation method of homopolymer nanoparticles of claim 7 , wherein the hydrophilic initiator is at least one selected from the group consisting of 2,2′-azobis[2-(2-imidazolin-2-yl)propane]dihydrochloride, 4,4-azobis(4-cyanovaleric acid), ammonium persulfate, potassium persulfate, sodium persulfate, ammonium bisulfate, sodium bisulfate and 1,1-azobis(1-methylbutyronitrile-3-sodium sulfonate).

Assignees

• Gwangju Inst Science & Tech

Inventors

• Lee Jae-Suk
• Kumar Santosh
• Kim Dong Woo
• Changei Mohammad
• Lee Hong-Joon

Classifications

• A61K9/5138

  obtained by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polyvinyl pyrrolidone, poly(meth)acrylates · CPC title

• C08F120/42

  Nitriles · CPC title

• C08F2/22 Primary

  Emulsion polymerisation · CPC title

• C08F126/10

  N-Vinyl-pyrrolidone · CPC title

• C08F120/20

  of polyhydric alcohols or {polyhydric} phenols {, e.g. 2-hydroxyethyl (meth)acrylate or glycerol mono-(meth)acrylate} · CPC title