# US 11,993,866 B2 · Super-amphiphilic fiber-nanowire composite and application

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- Number: US 11,993,866 B2
- Document ID: US11993866B2
- Status: Granted
- Kind: B2
- Application number: 17/552,475
- Filed: 2021-12-16
- Published: 2022-06-16
- Granted: 2024-05-28
- Earliest claimed: 2020-12-16
- Assignees: Korea University Research and Business Foundation
- Applicants: Korea University Research and Business Foundation
- Inventors: Young Keun Kim; Jung Bae Kim; Sang Won Byun; Bum Chul Park; Young Jun Ju
- Web page: https://patentgrep.com/patent/US11993866B2

## CPC

- D01D 5/0007: {Electro-spinning (non-woven fabrics produced by electro-spinning D04H1/728)}
- D01D 5/003: {the material being a polymer solution or dispersion (D01D5/0053 takes precedence)}
- C01G 9/02: Oxides; Hydroxides
- C30B 7/10: by application of pressure, e.g. hydrothermal processes
- C30B 29/16: Oxides
- C30B 29/60: characterised by shape
- D01D 1/02: Preparation of spinning solutions
- D01F 1/02: Addition of substances to the spinning solution or to the melt (addition of substances to viscose D01F2/08)
- D01F 1/10: Other agents for modifying properties
- D01F 11/00: Chemical after-treatment of artificial filaments or the like during manufacture
- D04H 1/728: by electro-spinning {(electro-spinning methods and apparatus D01D5/0007)}
- B82Y 30/00: Nanotechnology for materials or surface science, e.g. nanocomposites
- B82Y 40/00: Manufacture or treatment of nanostructures
- D01F 6/625: {derived from hydroxy-carboxylic acids, e.g. lactones}
- D10B 2401/13: anti-allergenic or anti-bacterial
- D10B 2505/04: Filters
- D01D: MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- C01G: COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F (metal hydrides {monoborane, diborane or addition complexes thereof} C01B6/00; salts of oxyacids of halogens C01B11/00; peroxides, salts or peroxyacids C01B15/00; thiosulfates, dithionites, polythionates C01B17/64; compounds containing selenium, or tellurium C01B19/00; binary compounds of nitrogen with metals C01B21/06; azides C01B21/08; {compounds containing nitrogen, other non-metals and metal C01B21/082}; metal amides C01B21/092; nitrites C01B21/50; {compounds of noble gases C01B23/0005}; phosphides C01B25/08; salts of oxyacids of phosphorus C01B25/16; carbides C01B32/90; compounds containing silicon C01B33/00; compounds containing boron C01B35/00; compounds having molecular sieve properties but not having base-exchange properties C01B37/00; compounds having molecular sieve and base-exchange properties, e.g. crystalline zeolites, C01B39/00; cyanides C01C3/08; salts of cyanamide C01C3/16; thiocyanates C01C3/20)
- C30B: SINGLE-CRYSTAL GROWTH (by using ultra-high pressure, e.g. for the formation of diamonds, B01J3/06); UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL (zone-refining of metals or alloys C22B); PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE (casting of metals, casting of other substances by the same processes or devices B22D; working of plastics B29; modifying the physical structure of metals or alloys C21D, C22F); SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE (for producing semiconductor devices or parts thereof H10); APPARATUS THEREFOR
- D01F: CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D04H: MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL (weaving D03; knitting D04B; braiding D04C; net-making D04G; sewing D05B; tufting D05C; finishing non-woven fabrics D06); FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING {; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION}(non-woven fabrics having an intermediate or external layer of a different kind, e.g. of woven fabric, B32B)
- B82Y: SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- D10B: INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES

## Abstract

The present invention relates to a fiber-nanowire composite-based sheet having super-amphiphilic characteristics. In the present invention, fibers including metal nanoparticles or metal oxide nanoparticles embedded in the fibers or located on the surface of the fibers are synthesized, and a sheet based on a composite in which metal nanowires or metal oxide nanowires have been grown from the above fibers is provided. A sheet of the present invention has super-amphiphilic characteristics and can be used in various fields such as the antibacterial filter field, the antibacterial film field, the antiviral filter field, the antiviral film field, the antifouling coating field, the drug delivery vehicle field, or the water treatment filter field.

## Claims

### Claim 1

A method of manufacturing a fiber-nanowire composite-based sheet, comprising the steps of:
electrospinning an electrospinning solution including metal nanoparticles or metal oxide nanoparticles and a polymer and thus preparing a fiber-nanoparticle composite;
adding the fiber-nanoparticle composite to a nanowire synthesis solution containing metal ions and then performing sonication; and
growing metal nanowires or metal oxide nanowires from metal nanoparticles or metal oxide nanoparticles located inside and/or on the surface of the fiber-nanoparticle composite,
wherein the sonication is performed at an intensity of 1 kHz to 100 kHz for 1 second to 600 seconds.

### Claim 2 (depends on 1)

The method of claim 1, wherein the metal or the metal oxide includes one or more selected from the group consisting of zinc oxide (ZnO), zirconium oxide (ZrO2), aluminum oxide (Al2O3), manganese oxide (MnO2), titanium oxide (TiO2), copper oxide (CuO), tungsten oxide (WO3), vanadium oxide (V2O5), iron oxide (Fe3O4), cobalt oxide (Co3O4), nickel oxide (NiO), nickel (Ni), copper (Cu), silver (Ag), and gold (Au).

### Claim 3 (depends on 1)

The method of claim 1, wherein an average diameter of the metal nanoparticles or the metal oxide nanoparticles is in the range of 2 nm to 200 nm.

### Claim 4 (depends on 1)

The method of claim 1, wherein the polymer includes one or more selected from the group consisting of polylactic acid (PLA), polyglycolic acid (PGA), polycaprolactone (PCL), poly(lactic-co-glycolic acid) (PLGA), polyhydroxybutyrate (PHB), polyurethane (PU), polyacrylonitrile (PAN), polyvinyl alcohol (PVA), polyethylene oxide (PEO), polyaniline (PANI), polystyrene (PS), polymethyl methacrylate (PMMA), polyvinylidene fluoride (PVDF), and polycarbonate (PC).

### Claim 5 (depends on 1)

The method of claim 1, wherein an average diameter of the fiber is in the range of 50 nm to 5,000 nm.

### Claim 6 (depends on 1)

The method of claim 1, wherein, in the nanowire synthesis solution, the metal ions include one or more selected from the group consisting of zinc ions (Zn2+), zirconium ions (Zr2+), aluminum ions (Al3+), manganese ions (Mn2+), itanium ions (Ti2+), copper ions (Cu2+), tungsten ions (W6+), vanadium ions (V4+), iron ions (Fe2+, Fe3+), cobalt ions (Co2+, Co3+), nickel ions (Ni2+), silver ions (Ag+), and gold ions (Au+).

### Claim 7 (depends on 1)

The method of claim 1, wherein the sonication is performed at an intensity of 1 kHz to 100 kHz for 1 second to 100 seconds.

### Claim 8 (depends on 1)

The method of claim 1, wherein the growth of the metal nanowires or metal oxide nanowires is performed at a temperature of 30° C. to 99° C. for 1 minute to 1,200 minutes.

### Claim 9 (depends on 1)

The method of claim 1, wherein a length of the metal nanowires or the metal oxide nanowires is in the range of 50 nm to 7,000 nm, and a diameter thereof is in the range of 10 nm to 500 nm.