A mxene@cs@pdms three-dimensional porous composite material and its preparation method and application

A composite material, three-dimensional technology, applied in the application field, can solve the problems of large sensor use limitations, difficult to achieve mass production, cumbersome preparation methods, etc., to achieve the effect of small hysteresis, simple method and simple process

Active Publication Date: 2021-01-12
BEIJING UNIV OF CHEM TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the research on using cube sugar as the matrix template as the sensor skeleton (document 1, 2, 3) and the research on using MXene as the conductive filler (document 4, 5) the preparation method is cumbersome, the cost is high, and the prepared The use of sensors is limited and it is difficult to achieve mass production

Method used

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  • A mxene@cs@pdms three-dimensional porous composite material and its preparation method and application
  • A mxene@cs@pdms three-dimensional porous composite material and its preparation method and application
  • A mxene@cs@pdms three-dimensional porous composite material and its preparation method and application

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Experimental program
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Effect test

Embodiment 1

[0047] The preparation method of MXene nanosheets is as follows:

[0048] (1) Add 10ml of deionized water into a polytetrafluoroethylene container, and put it in an ice bath to lower the temperature of the deionized water to below 5°C. Slowly add 20ml of 9 moles per liter of HCl under the condition of magnetic stirring, and continue to stir Lower the temperature below 5 degrees Celsius, add 1g LiF, and stir for 1h;

[0049] (2) Slowly add 1gMAX precursor into the Teflon container;

[0050] (3) After adding the MAX precursor, naturally raise the temperature to room temperature for about 30 minutes, then raise the temperature to 35°C, and maintain the reaction for about 25 hours;

[0051] (4) Centrifuge the reacted product at 3500rpm for 5min, and repeat it several times until the pH of the supernatant is greater than 6;

[0052] (5) Collect the final neutral or near-neutral suspension, and ultrasonically strip it under the protection of argon;

[0053] (6) Centrifuge the sus...

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Abstract

The invention relates to an MXene@CS@PDMS three-dimensional porous composite material and a preparation method and application thereof. A high-sensitivity and high-reliability piezoresistive sensor isprepared by using the material. Since the cube sugar micro-pore granularity is proper and the structure is loose, the prepared PDMS has a three-dimensional sponge-like porous structure by using the cube sugar as a template and has the high flexibility and deformability. With introduction of the MXen@CS@PDMS system, an MXene nanosheet is attached to the PDMS surface tightly after successful loading of the MXene, so that a reliable three-dimensional conductive material is formed. Moreover, reaction parameters in the process of preparing the sensor are optimized to obtain the MXene@CS@PDMS composite three-dimensional structure with good stress and strain is obtained.

Description

technical field [0001] The invention belongs to the field of flexible and wearable electronics and the technical field of new materials, and specifically relates to a MXene@CS@PDMS three-dimensional porous composite material and its preparation method and application, more specifically a novel composite piezoresistive MXene@CS@ A PDMS three-dimensional porous composite material, a preparation method thereof, and a low-cost piezoresistive pressure sensor assembled using the composite material. Background technique [0002] As a new type of conductive material, the flake nanomaterial MXene is a two-dimensional transition metal carbide / nitride. The first MXene was discovered in 2011 by Prof. Yuri Gao Guoqi from Drexel University and his colleagues. MXene is obtained by etching the MAX phase of its precursor material. Among them, M is a transition group metal, A is mainly a group III or IV element, and X is a C or N element. Because MXene has a two-dimensional sheet structure...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01L1/18G01L9/06B82Y30/00B82Y40/00B82Y15/00
CPCB82Y15/00B82Y30/00B82Y40/00G01L1/18G01L9/06
Inventor 李晓锋贾雪芹李晓鹏宋德奎于中振
Owner BEIJING UNIV OF CHEM TECH
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