Metal and ceramic nanofibers

Patent metadata

Field	Value
Publication number	US-12005040-B2
Application number	US-202117330760-A
Country	US
Kind code	B2
Filing date	May 26, 2021
Priority date	Aug 30, 2011
Publication date	Jun 11, 2024
Grant date	Jun 11, 2024

Abstract

Provided herein are nanofibers and processes of preparing nanofibers. In some instances, the nanofibers are metal and/or ceramic nanofibers. In some embodiments, the nanofibers are high quality, high performance nanofibers, highly coherent nanofibers, highly continuous nanofibers, or the like. In some embodiments, the nanofibers have increased coherence, increased length, few voids and/or defects, and/or other advantageous characteristics. In some instances, the nanofibers are produced by electrospinning a fluid stock having a high loading of nanofiber precursor in the fluid stock. In some instances, the fluid stock comprises well mixed and/or uniformly distributed precursor in the fluid stock. In some instances, the fluid stock is converted into a nanofiber comprising few voids, few defects, long or tunable length, and the like.

First claim

What is claimed is:

1. A nanofiber comprising:
a metal containing material comprising one or more metal containing precursors, wherein the one or more metal containing precursors comprise one or more electrophilic moieties or one or more nucleophilic moieties;
a non-metal material comprising a polymer comprising a plurality of nucleophilic moieties or a plurality of electrophilic moieties;
wherein the polymer is configured to react with the one or more metal containing precursors through a non-sol-gel reaction between the nucleophilic moieties and the electrophilic moieties; and
a precursor-polymer bond or a precursor-polymer association between the polymer and the one or more metal containing precursors
wherein the nanofiber is a precursor nanofiber.

2. The nanofiber of claim 1 , wherein the polymer comprises partially or completely ionized forms.

3. The nanofiber of claim 1 , wherein a weight to weight ratio of the one or more metal containing precursors to the polymer is at least 3:1.

4. The nanofiber of claim 1 , wherein the metal containing material further comprises a metal, metal alloy, metal oxide, metal-non-metal alloy, ceramic, or any combination thereof.

5. The nanofiber of claim 1 , wherein the non-metal material further comprises a carbonaceous material.

6. The nanofiber of claim 1 , wherein the precursor-polymer bond or the precursor-polymer association comprises a covalent bond, a metal-ligand complex, an ionic bond, or a Lewis base/Lewis acid interaction formed by the one or more metal containing precursors associating with, or binding to the polymer.

7. A process for producing the nanofiber of claim 1 , comprising:
providing a fluid stock comprising:
1) the one or more metal containing precursors comprising one or more of the electrophilic moieties; and the non-metal material comprising the polymer comprising a plurality of the nucleophilic moieties; or
2) the one or more metal containing precursors comprising one or more of the nucleophilic moieties; and the non-metal material comprising the polymer comprising a plurality of the electrophilic moieties;
mixing the one or more metal containing precursors with the polymer such that the metal containing precursors react with or more of the non-sol-gel reaction between the nucleophilic moieties and the electrophilic moieties;
electrospinning the fluid stock to form the nanofiber.

8. The process of claim 7 , further comprising one of more processes for treating the nanofiber, wherein the processes are selected from heating, calcination, solubilizing the polymer, chemically degrading the polymer or any combination thereof.

Assignees

• Univ Cornell

Inventors

• Joo Yong Lak
• Hansen Nathaniel S
• Cho Daehwan

Classifications

• A61K31/232

  having three or more double bonds, e.g. etretinate · CPC title

• H01B1/08

  oxides · CPC title

• H01B1/026

  Alloys based on copper · CPC title

• H01B1/02

  mainly consisting of metals or alloys · CPC title

• D01F1/10

  Other agents for modifying properties · CPC title