Strain sensor using nanocomposite and method for manufacturing thereof

Patent metadata

Field	Value
Publication number	US-2016290780-A1
Application number	US-201615072845-A
Country	US
Kind code	A1
Filing date	Mar 17, 2016
Priority date	Apr 1, 2015
Publication date	Oct 6, 2016
Grant date	—

Abstract

A strain sensor and a method of manufacturing the same are provided. The strain sensor includes a substrate, a nanocomposite layer disposed on the substrate, and a protective layer disposed on the nanocomposite layer. The nanocomposite layer includes metallic nanowires, a first polymeric material, and a second polymeric material. The protective layer includes a third polymeric material. The metallic nanowires are randomly arranged in the nanocomposite layer.

First claim

What is claimed is:

1 . A strain sensor, comprising:
a substrate; a nanocomposite layer disposed on the substrate, and comprising metallic nanowires, a first polymeric material, and a second polymeric material; and a protective layer disposed on the nanocomposite layer, and comprising a third polymeric material, wherein the metallic nanowires are randomly arranged in the nanocomposite layer.

2 . The strain sensor of claim 1 , wherein the protective layer further comprises one or more of the first polymeric material and the second polymeric material.

3 . The strain sensor of claim 1 , wherein the first polymeric material is one or more selected from the group consisting of poly(3,4-ethylenedioxythiophene):poly(4-styrenesulfonate) (PEDOT:PSS), polyacetylene, polyparaphenylene, polypyrrole, and polyaniline.

4 . The strain sensor of claim 1 , wherein the second polymeric material is one or more selected from the group consisting of polydimethylsiloxane (PDMS), ecoflex and polyurethane (PU).

5 . The strain sensor of claim 1 , wherein the substrate is one or more selected from the group consisting of PDMS, ecoflex, and PU.

6 . The strain sensor of claim 1 , wherein the third polymeric material is one or more selected from the group consisting of PDMS, ecoflex, and PU.

7 . The strain sensor of claim 1 , wherein the metallic nanowires comprise gold, silver, nickel, copper, platinum, aluminum, or a combination thereof.

8 . A method of manufacturing a strain sensor using a nanocomposite, the method comprising:
forming, on a substrate, a nanocomposite layer comprising metallic nanowires, a first polymeric material, and a second polymeric material; and forming, on the nanocomposite layer, a protective layer comprising a third polymeric material, wherein the metallic nanowires are randomly arranged in the nanocomposite layer.

9 . The method of claim 7 , wherein the forming of a nanocomposite layer comprises:
exposing the substrate to oxygen-plasma; spin-coating a first solution comprising the metallic nanowires on the oxygen-plasma treated substrate and performing a first heat treatment; and spin-coating, on the substrate on which the metallic nanowires are randomly arranged, a second solution comprising the first polymeric material and the second polymeric material, and performing a second heat treatment.

10 . The method of claim 8 , wherein the spin-coating of the first solution is performed at a rotational speed of about 200 to about 400 rpm.

11 . The method of claim 8 , wherein a concentration of the first polymeric material in the second solution is about 10 to about 50%.

12 . The method of claim 8 , wherein a concentration of the second polymeric material in the second solution is about 50 to about 90%.

13 . The method of claim 7 , wherein the forming of a protective layer comprises:
spin-coating a third solution comprising a third polymeric material on the substrate, on which the nanocomposite layer is formed, and performing a second heat treatment.

14 . The method of claim 8 , wherein the first heat treatment comprises heating at about 50 to about 120° C. for about 10 to about 30 minutes.

15 . The method of claim 8 , wherein the second heat treatment comprises heating, under a nitrogen (N 2 ) atmosphere, at about 50 to about 120° C. for about 10 to about 30 minutes and heating at about 120 to about 200° C. for about 60 to about 120 minutes.

Assignees

• Univ Sungkyunkwan Res & Bus

Inventors

• Lee Nae Eung
• Hwang Byeong Ung
• Tran Quang Trung

Classifications

• G01B7/18 Primary

  using change in resistance · CPC title

• G01L1/2287 Primary

  constructional details of the strain gauges (adjustable resistors H01C10/00) · CPC title

• G01L1/22 Primary

  using resistance strain gauges · CPC title

• B82Y30/00

  Nanotechnology for materials or surface science, e.g. nanocomposites · CPC title