Nanofiber-nanowire composite and preparation method therefor

Patent metadata

Field	Value
Publication number	US-2018347075-A1
Application number	US-201816043623-A
Country	US
Kind code	A1
Filing date	Jul 24, 2018
Priority date	Aug 30, 2016
Publication date	Dec 6, 2018
Grant date	—

Abstract

Provided are a nanofiber-nanowire composite and a method for producing the same. The method includes preparing a nanoparticle using a dipolar solvent, producing a nanofiber-nanoparticle composite in an electrospinning synthesis solution including the nanoparticle through electrospinning, and growing a nanowire from the nanoparticle by hydrothermally synthesizing a dried nanofiber-nanoparticle composite.

First claim

What is claimed is:

1 . A method for producing a nanofiber-nanowire composite, the method comprising:
preparing a nanoparticle using a dipolar solvent; producing a nanofiber-nanoparticle composite in an electrospinning synthesis solution including the nanoparticle through electrospinning; and growing a nanowire from the nanoparticle by hydrothermally synthesizing a dried nanofiber-nanoparticle composite.

2 . The method as set forth in claim 1 , wherein the nanoparticle is a metal-oxide nanoparticle, and
wherein the nanofiber includes a biodegradable polymer.

3 . The method as set forth in claim 2 , wherein preparing the nanoparticle comprises:
dissolving a zinc-oxide precursor in the dipolar solvent to prepare a zinc-oxide precursor solution; heating hexadecyltrimethylammonium bromide ((C 16 H 33 )N(CH 3 ) 3 Br) as a cation surfactant and the zinc-oxide precursor solution at a temperature between 40 and 60 degrees Celsius; dissolving sodium hydroxide (NaOH) in the dipolar solvent to prepare and heat a sodium hydroxide solution at a temperature between 40 and 60 degrees Celsius; precipitating the nanoparticle by mixing the sodium hydroxide with the zinc-oxide precursor solution in which the cation surfactant is mixed and reacting the mixed solution at a temperature between 40 and 60 degrees Celsius; and cleaning the precipitated nanoparticle with a cleaning agent and drying the cleaned nanoparticle to extract a zinc-oxide nanoparticle.

4 . The method as set forth in claim 1 , wherein producing the nanofiber-nanoparticle composite in the electrospinning synthesis solution including the nanoparticle through the electrospinning comprises:
dissolving a nanofiber synthesis polymer in an organic solvent to produce an electrospinning composite solution; dissolving a dried nanoparticle in the dipolar solvent; dispersing the nanoparticle in the dipolar solvent; injecting a solution including the nanoparticle into the electrospinning composite solution and agitating the injected solution with the electrospinning composite solution; and producing a nanofiber-nanoparticle composite from the electrospinning composite solution using an electrospinning device, wherein the nanofiber synthesis polymer is a poly(L-lactide) (PLLA) polymer, and wherein the organic solvent is chloroform (CHCl 3 ).

5 . The method as set forth in claim 1 , wherein growing the nanowire from the nanoparticle by hydrothermally synthesizing the dried nanofiber-nanoparticle composite comprises:
adding the nanofiber-nanoparticle composite to a nanowire composite aqueous solution including a zinc-oxide precursor and hexamethylenetetramine (HMTA).

6 . The method as set forth in claim 5 , wherein the zinc-oxide precursor is zinc nitrate hexahydrate ((Zn(NO 3 ) 2 +6H 2 O), and
wherein the nanowire synthesis aqueous solution includes ammonium chloride (NH4Cl2) and polyethylenimine (H(NHCH 2 CH 2 ) n NH 2 ) (PEI).

7 . The method as set forth in claim 1 , wherein the dipolar solvent includes at least one of ethanol, methanol, dimethylformamide (DMF), and tetrahydrofuran (THF).

8 . The method as set forth in claim 2 , wherein the biodegradable polymer includes at least one of PLLA, polyhydroxybutyrate (PHB), polyurethane (PU), and polycarbonate (PC).

9 . The method as set forth in claim 1 , wherein the nanofiber is synthesized from a polymer whose melting point is higher than or equal to 90 to 92 degrees Celsius.

10 . A nanofiber-nanowire composite produced by claim 1 .

Assignees

• Univ Korea Res & Bus Found

Inventors

• Kim Young Keun
• Park Bum Chul
• Shin Ji-Beom

Classifications

• C01P2002/72

  by d-values or two theta-values, e.g. as X-ray diagram · CPC title

• C01P2004/04

  obtained by TEM, STEM, STM or AFM · CPC title

• C01P2004/16

  Nanowires or nanorods, i.e. solid nanofibres with two nearly equal dimensions between 1-100 nanometer · CPC title

• C04B35/62231 Primary

  based on oxide ceramics · CPC title

• C04B2235/5264

  characterised by the diameter of the fibers · CPC title