Electrified constant-temperature test paper base material and preparation method thereof

A technology of test paper and constant temperature, applied in chemical instruments and methods, papermaking, paper coating, etc., can solve problems such as no solution reported in literature, and achieve improvement of poor dispersion, low process maturity, and low environmental pollution Effect

Inactive Publication Date: 2020-01-03
ZHEJIANG UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The heating rate of the conductive heating paper substrate after energization and whether the final temperature is maintained at 40°C are the two main

Method used

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  • Electrified constant-temperature test paper base material and preparation method thereof
  • Electrified constant-temperature test paper base material and preparation method thereof
  • Electrified constant-temperature test paper base material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0050] Example 1:

[0051] Preparation of ToCN (cellulose nanofibers): prepare 100mL of cotton pulp suspension with a mass concentration of 1%, add 0.1g sodium bromide and 0.02g tempo(2,2,6,6-tetramethylpiperidine oxygen free radical) ) Reagent, stir well and then add 5 mL of sodium hypochlorite solution with a concentration of 0.15 mol / L, and after mixing, adjust the pH of the mixed solution to 10 with a concentration of 0.1 mol / L dilute hydrochloric acid solution to obtain a mixed reaction solution; The mixed reaction solution was placed in an ice-water bath and stirred for 6 hours. During the stirring process, a NaOH solution with a concentration of 0.1 mol / L was continuously added dropwise to maintain the pH of the mixed reaction solution at 10. After the reaction, 1% ToCN solution can be obtained.

[0052] CNTs (carbon nanotubes) modification: dissolve naphthalene sulfonic acid in water, and control the concentration of naphthalene sulfonic acid at 20 g / L. The carbon nanotub...

Example Embodiment

[0056] Embodiment two:

[0057] Preparation of ToCN: prepare 100mL of cotton pulp suspension with a mass concentration of 1%, add 0.1g of sodium bromide and 0.02g of tempo (2,2,6,6-tetramethylpiperidinyloxy radical) reagent, stir well and then Add 5 mL of sodium hypochlorite solution with a concentration of 0.15 mol / L, and after mixing, adjust the pH of the mixed solution to 10 with a concentration of 0.1 mol / L dilute hydrochloric acid solution to obtain a mixed reaction solution; then set the mixed reaction solution The reaction was stirred in an ice-water bath for 6 hours, and NaOH solution with a concentration of 0.1 mol / L was continuously added dropwise during the stirring process to maintain the pH of the mixed reaction solution at 10. After the reaction, 1% ToCN solution can be obtained.

[0058] Modification of CNTs: Dissolve naphthalenesulfonic acid in water, and control the concentration of naphthalenesulfonic acid at 30g / L. The carbon nanotubes were added to the naphtha...

Example Embodiment

[0062] Embodiment three:

[0063] Preparation of ToCN: prepare 100mL of cotton pulp suspension with a mass concentration of 1%, add 0.1g of sodium bromide and 0.02g of tempo (2,2,6,6-tetramethylpiperidinyloxy radical) reagent, stir well and then Add 5 mL of sodium hypochlorite solution with a concentration of 0.15 mol / L, and after mixing, adjust the pH of the mixed solution to 10 with a concentration of 0.1 mol / L dilute hydrochloric acid solution to obtain a mixed reaction solution; then set the mixed reaction solution The reaction was stirred in an ice-water bath for 6 hours, and NaOH solution with a concentration of 0.1 mol / L was continuously added dropwise during the stirring process to maintain the pH of the mixed reaction solution at 10. After the reaction, 1% ToCN solution can be obtained.

[0064] Modification of CNTs: Dissolve naphthalenesulfonic acid in water, and control the concentration of naphthalenesulfonic acid at 40g / L. The carbon nanotubes are added to the naphth...

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Abstract

The invention discloses an electrified constant-temperature test paper base material, which comprises filtering paper and a coating material dispersed on the filtering paper, wherein the coating material is prepared from the following components: 1-5 parts of graphene oxide, 1 part of cellulose nano-fibers and 10-50 parts of modified carbon nano-tubes. The invention further discloses a preparationmethod of the electrified constant-temperature test paper base material, wherein the preparation method comprises: modifying carbon nano-tubes; adding a mixed solution of graphene oxide and cellulosenano-fibers into the modified carbon nano-tube solution to obtain a coating material; preparing an electric-conducting heating layer, and coating; and drying, and cutting the dried coated paper to obtain the electrified constant-temperature test paper. According to the invention, with the method, the electrified constant-temperature test paper can be prepared; the carbon nano-tubes are modified,so that the problem of dispersibility of the carbon nano-tubes is solved, and the firmness of the heating layer is further ensured; and the regulation and control model of the electrified constant-temperature test paper can be used for quickly and effectively designing an electric-conducting layer and improving the temperature rise efficiency.

Description

【Technical field】 [0001] The invention relates to the technical field of heating test paper, in particular to the technical field of the electrified constant temperature test paper base material and a preparation method thereof. 【Background technique】 [0002] Microfluidic detection technology is an analytical detection technology that uses microchannels to control, process and analyze extremely small amounts of fluid, and has high scientific and commercial potential. Microfluidic devices are small in size, low in energy consumption, and highly portable, and can complete biological or chemical experiments that can only be achieved with large-scale instruments in conventional laboratories on a chip of several square centimeters. Through the realization of the concept of "Lab-on-a-chip (LOC)" or "micro-total analysis system (μTAS)", microfluidic technology has been demonstrated in the fields of molecular biology, analytical chemistry, and on-site instant medical diagnosis. a ...

Claims

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Application Information

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IPC IPC(8): D21H19/38D21H19/52D21H25/06C01B32/168B01L3/00
CPCB01L3/5027C01B32/168D21H19/38D21H19/52D21H25/06Y02P20/10
Inventor 许银超张微李国毅沙力争张学金金光范寇顺利王黎航
Owner ZHEJIANG UNIVERSITY OF SCIENCE AND TECHNOLOGY
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