Unlock instant, AI-driven research and patent intelligence for your innovation.

Static pressure piezochromic material and preparation method thereof

A piezochromic and static pressure technology, applied in the field of materials, can solve the problems of small color changes and the inability to realize the adjustment of visible light bands, and achieve the effect of huge application potential

Inactive Publication Date: 2019-06-25
ZHEJIANG UNIV OF TECH
View PDF2 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the color change of the reported materials is small, and the adjustment of the visible light range (blue to red fluorescence) cannot be realized.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Static pressure piezochromic material and preparation method thereof
  • Static pressure piezochromic material and preparation method thereof
  • Static pressure piezochromic material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Weigh 4.20g (20mmol) of 4,4'-biphenyldicarbaldehyde (II), 5.88g (40mmol) of p-methoxyphenylacetonitrile (III) and 0.27g (5mmol) of sodium methoxide and dissolve them in 30ml of absolute ethanol. The reaction was stirred at room temperature for 10 h, and the reaction was terminated when a large amount of solid particles were precipitated. Then put the reaction system into -20 DEG C refrigerator and let it stand overnight for 12h, then filter, precipitate with methanol rinse (20mL * 3) times, after natural drying, a white powder is obtained, i.e. the target product (I) is 8.4g in total, and the yield is 90.0%. It is piezochromic material. 1 H NMR (500MHz, CDCl 3 ): δ (ppm) 8.00 (d, J = 8.5Hz, 4H), 7.76 (d, J = 8.5Hz, 4H), 7.65 (d, J = 8.5, 4H), 7.49 (s, 2H), 7.00 ( d, J=9Hz, 4H), 3.89(s, 6H); MS m / z: 468.4(M+).

Embodiment 2

[0023] Weigh 4.20g (20mmol) of 4,4'-biphenyldicarbaldehyde (II), 6.03g (41mmol) of p-methoxyphenylacetonitrile (III) and 0.27g (5mmol) of sodium methoxide and dissolve them in 30ml of absolute ethanol. The reaction was stirred at room temperature for 10 h, and the reaction was terminated when a large amount of solid particles were precipitated. Then the reaction system was put into -20 DEG C of refrigerator and left to stand overnight for 12h, then filtered, and the precipitate was rinsed with methanol (20mL × 3) times, and after natural drying, a white powder was obtained, that is, a total of 8.52g of the target product (I), and the yield was 91%. It is piezochromic material.

Embodiment 3

[0025] Weigh 4.20g (20mmol) of 4,4'-biphenyldicarbaldehyde (II), 5.88g (40mmol) of p-methoxyphenylacetonitrile (III) and 0.26g (4.8mmol) of sodium methoxide and dissolve them in 40ml of absolute ethanol . The reaction was stirred at room temperature for 10 h, and the reaction was terminated when a large amount of solid particles were precipitated. Then the reaction system was put into -20 DEG C refrigerator and left to stand overnight for 12h, then filtered, and the precipitate was rinsed with methanol (20mL×3) times, and after natural drying, a white powder was obtained, that is, the target product (I) was 8.18g in total, and the yield was 87.4%. It is piezochromic material.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a static pressure piezochromic material and a preparation method thereof. The material is prepared by: taking p-methoxy phenylacetonitrile and 4, 4'-biphenyldicarboxaldehyde asthe raw materials, and then conducting Knoevenagel condensation. The piezochromic material provided by the invention can cover visible light (from blue to red fluorescence) at different static pressures in a color change interval, and the fluorescence wavelength and static pressure has good quantitative relationship, therefore the static pressure piezochromic material has enormous application potential in pressure sensing systems.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to a static pressure-induced chromic material and a preparation method thereof. Background technique [0002] Pressure (force)-induced fluorescent discoloration refers to the phenomenon of reversible changes in fluorescent color or / and intensity under the action of external mechanical force (friction, shearing, etc.) or static pressure. The piezochromism achieved by grinding is usually subjected to anisotropic forces (stretching, extrusion, shearing) during the grinding process. The piezochromism achieved by static pressure is subjected to isotropic force. Piezochromic fluorescence (PCF) materials have great application potential in deep-sea submersibles, aircraft wind tunnel tests, and ultra-deep exploration wells because their fluorescence can change continuously under pressure. [0003] At present, the currently reported static pressure-induced chromic molecules m...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C09K9/02C07C253/30C07C255/37
Inventor 张诚罗卿卓朝政
Owner ZHEJIANG UNIV OF TECH