Solution based polymer nanofiller-composites synthesis

Patent metadata

Field	Value
Publication number	US-9738762-B2
Application number	US-201514942148-A
Country	US
Kind code	B2
Filing date	Nov 16, 2015
Priority date	May 9, 2013
Publication date	Aug 22, 2017
Grant date	Aug 22, 2017

Abstract

A solution based polymer nanofiller composite processing method to improve mechanical, electrical, thermal and/or chemical properties. The solution based synthesis method may include the steps of surface functionalizing carbon nanomaterials and dissolving a polymer in a solvent. The functionalized carbon nanomaterials and dissolved polymer may be mixed until the mixture is homogenous. The mixture may be cured to form the polymer carbon nano-composite material, which provides significant improvements in modulus, hardness, strength, fracture toughness, wear, fatigue, creep, and damping performance.

First claim

What is claimed is:

1. A polymer nanofiller composite comprising:
a polymer;
one or more vulcanizing agent; and
nanoclay or carbon nanomaterials dispersed within the polymer, wherein the nanoclay or carbon nanomaterials are functionalized to form a first nanofiller solution that improves chemical bonding between the nanoclay or carbon nanomaterials and the polymer, the nanoclay or carbon nanomaterials are carbon nanotubes (CNTs), carbon nanofibers (CNFs), or non-spherical nanoclays;
wherein further the polymer is dissolved ina solvent to form a second polymer solution, the second polymer solution consist of the polymer, solvent, and the one or more vulcanizing agent, the nanoclay or carbon nanomaterials are dispersed within the polymer utilizing a solution based approach where the polymer nanofiller composite is formed from a mixture consisting of the first nanofiller solution and the second polymer solution, which uniformly distributes the nanofillers in the polymeric matrices, that is cured after mixing, and wherein the polymer nanofiller composite equal to or between 25-30 wt % of the nanoclay or carbon nanomaterials and equal to or between 70-99 wt % of the polymer.

2. The composite of claim 1 , wherein the polymer nanofiller composite demonstrates a hardness of 65 or greater (Hardness A, pts).

3. The composite of claim 1 , wherein the polymer nanofiller composite demonstrates a modulus at 100% strain of 600 psi or better.

4. The composite of claim 1 , wherein the nanoclay or carbon nanomaterials are carbon nanofibers (CNFs),and the nanoclay or carbon nanomaterials further include carbon black.

5. The composite of claim 4 , wherein the nanoclay or carbon nanomaterials are functionalized with an agent that improves chemical bonding between the nanoclay or carbon nanomaterials and a polymer.

6. The composite of claim 1 , wherein the vulcanizing agent is sulfur, peroxides, urethane crosslinkers, metallic oxides, acetoxysilane, curatives, and/or accelerators.

7. The composite of claim 1 , wherein the polymer is Nitrile Butadiene Rubber (NBR), Hydrogenated Nitrile Butadiene Rubber (HNBR), Natural polyisoprene, Synthetic polyisoprene, Polybutadiene, Chloropene rubber, Butyl rubber, Halogenated butyl rubbers, or Styrene-butadiene Rubber.

8. The composite of claim 1 , wherein the nanoclay or carbon nanomaterials are functionalized with an oxidizing agent.

9. The composite of claim 8 , wherein the oxidizing agent is nitric acid, sulfuric acid, a mixture of sulfuric acid and nitric acid, ozone, or hydrogen peroxide.

10. The composite of claim 8 , wherein functional groups of the nanomaterials are —OH, —COH, or —COOH.

11. The composite of claim 1 , wherein the nanoclay or carbon nanomaterials are carbon nano-fibers (CNFs), the CNFs are functionalized using nitric acid and sulfuric acid to create —COH and —COOH groups, and the polymer is rubber and the solvent is acetone and/or chloroform.

Assignees

• Sun Li
• Pitta Anil
• Duong Hung
• Univ Houston
• Vetco Gray Inc

Inventors

• Sun Li
• Pitta Anil
• Duong Hung

Classifications

• C08J3/215

  at least one additive being also premixed with a liquid phase · CPC title

• C08K9/02

  Ingredients treated with inorganic substances · CPC title

• C08K2201/011

  Nanostructured additives · CPC title

• C08K3/041

  Carbon nanotubes · CPC title

• C08J2315/00

  Characterised by the use of rubber derivatives (C08J2311/00, C08J2313/00 takes precedence) · CPC title