Nanocomposite Additives Based on Graphene Sheets and Silica Nanofibers

Patent metadata

Field	Value
Publication number	US-2018346684-A1
Application number	US-201816000975-A
Country	US
Kind code	A1
Filing date	Jun 6, 2018
Priority date	Jun 6, 2017
Publication date	Dec 6, 2018
Grant date	—

Abstract

A method for producing a composite polymeric article, an additive for a polymeric article, and a composite polymeric article are provided. The method generally includes providing a plurality of graphene nanoplatelets, providing a plurality of silica nanofibers, providing a polymeric material, and distributing the plurality of silica nanofibers and the plurality of graphene nanoplatelets within the polymeric material to achieve a composite article. The additive for a polymeric article includes a plurality of graphene nanoplatelets and a plurality of silica nanofibers. The composite polymeric article includes a plurality of graphene nanoplatelets, a plurality of silica nanofibers, and a polymeric matrix. The plurality of graphene nanoplatelets and the plurality of silica nanofibers are distributed within the polymeric matrix. The silica nanofibers have a mean cross sectional diameter of not more than 100 nm.

First claim

1 . A method of producing a composite polymeric article comprising:
providing a plurality of graphene nanoplatelets; providing a plurality of silica nanofibers, wherein the plurality of silica nanofibers have a mean cross sectional diameter of not more than 100 nm; providing a polymeric material; and distributing the plurality of silica nanofibers and the plurality of graphene nanoplatelets within the polymeric material to achieve a composite article.

2 . The method according to claim 1 , wherein the plurality of silica nanofibers are fabricated by electrospinning of a sol-gel precursor.

3 . The method according to claim 2 , wherein the sol-gel precursor is prepared by hydrolysis of a silicate in the presence of a catalyst, an amphiphilic polymer, and a solvent.

4 . The method according to claim 3 , wherein the plurality of silica nanofibers are calcinated and modified to generate hydrophobicity.

5 . The method according to claim 4 , wherein the plurality of silica nanofibers are modified with a silane.

6 . The method according to claim 1 , wherein the plurality of silica nanofibers and the plurality of graphene nanoplatelets are distributed within the polymeric material by solution blending.

7 . An additive for a polymeric article comprising:
a plurality of graphene nanoplatelets; and a plurality of silica nanofibers, wherein the plurality of silica nanofibers have a mean cross sectional diameter of not more than 100 nm.

8 . The additive of claim 7 , wherein the plurality of graphene nanoplatelets comprise graphene oxide covalently modified with an amide or ester functionalized molecule.

9 . The additive of claim 8 , wherein the plurality of graphene nanoplatelets comprises graphene oxide covalently modified with dodecylamine.

10 . The additive of claim 7 , wherein the plurality of graphene nanoplatelets include a surface area per unit weight of up to 1000 m 2 /g.

11 . The additive of claim 7 , wherein the plurality of silica nanofibers have a mean cross sectional diameter of at least 50 nm.

12 . A composite polymeric article comprising:
a plurality of graphene nanoplatelets; a plurality of silica nanofibers, wherein the plurality of silica nanofibers have a mean cross sectional diameter of not more than 100 nm; and a polymeric matrix, wherein the plurality of graphene nanoplatelets and the plurality of silica nanofibers are distributed within the polymeric matrix.

13 . The article of claim 12 , wherein the plurality of graphene nanoplatelets constitutes less than 1 percent by volume of the composite polymeric article.

14 . The article of claim 12 , wherein the plurality of graphene nanoplatelets constitutes less than 5 percent by weight of the polymeric matrix.

15 . The article of claim 12 , wherein the plurality of silica nanofibers constitutes between 20 percent and 25 percent of the volume of the composite polymeric article.

16 . The article of claim 12 , wherein the plurality of silica nanofibers constitutes less than approximately 20 percent by weight of the polymeric matrix.

17 . The article of claim 12 , wherein the polymeric matrix is an elastomeric polymer.

18 . The article of claim 17 , wherein the polymeric matrix is a styrene-butadiene rubber.

19 . The article of claim 12 , wherein the composite polymeric article comprises additional fillers.

20 . The article of claim 12 , wherein the composite polymeric article is a tire or an element thereof, a mechanical belt or an element thereof, a bumper or an element thereof, a shoe sole or an element thereof, a damper or an element thereof, or a shock mount or an element thereof.

Assignees

• Ut Battelle Llc

Inventors

• Polyzos Georgios
• Sharma Jaswinder K
• Vlassiouk Ivan V
• Schaffer Daniel A
• Datskos Panagiotis G
• Laclair Timothy J
• Park Jaehyeung

Classifications

• D01D5/003

  the material being a polymer solution or dispersion (D01D5/0053 takes precedence) · CPC title

• C08K9/06

  with silicon-containing compounds · CPC title

• C08K2201/003

  Additives being defined by their diameter · CPC title

• D10B2101/06

  Glass · CPC title

• C08K2201/006

  Additives being defined by their surface area · CPC title