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Flame-retardant anti-counterfeiting paper preparation method

A technology of anti-counterfeiting paper and paper, which is applied in the field of papermaking, can solve the problems of easy imitation, flammability of anti-counterfeiting paper, and insufficient fluorescence intensity, and achieve the effect of good flame retardancy, good anti-counterfeiting effect and rich raw materials

Active Publication Date: 2017-03-08
江西中竹生物质科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the above situation, in order to overcome the defects of the prior art, the object of the present invention is to provide a method for preparing flame-retardant anti-counterfeiting paper, which can effectively solve the problems of the existing anti-counterfeiting paper being flammable, easy to imitate, and the fluorescence intensity is not high enough

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The preparation method of the flame-retardant anti-counterfeit paper of embodiment 1 of the present invention comprises the following steps:

[0023] (1) Preparation of CdTe quantum dot suspension:

[0024] N 2 Under protection, take 20ml of a mixed solvent of ethanol and water with a volume ratio of 1:0.25-4, add 1-5g of tellurium powder and 4g-8g of sodium borohydride, and heat at 50°C-70°C for 20min-40min to make the tellurium powder and borohydride Sodium reacts to generate sodium telluride hydride, and then injects 30ml-60ml of dilute sulfuric acid with a concentration of 0.1mol / L to convert sodium telluride hydride into hydrogen telluride gas, and the generated hydrogen telluride gas is sent to the tail gas containing sodium hydroxide solution The absorption bottle is absorbed by a sodium hydroxide solution with a concentration of 1mol / L to generate a pure sodium hydride solution with a concentration of 0.01mol / L;

[0025] Under stirring, inject 500ml of 0.01mol...

Embodiment 2

[0037] The preparation method of embodiment 2 flame retardant anti-counterfeiting paper of the present invention comprises the following steps:

[0038] (1) Preparation of CdTe quantum dot suspension

[0039] Under the protection of N2, in 20ml of ethanol and water 1:2 mixed solvent, heat at 70°C for 20min-40min to react 1.27g of tellurium powder and 5.55g of sodium borohydride to form sodium tellurium hydride, and then inject 0.1mol / L into the system 50ml of dilute sulfuric acid converts sodium telluride hydride into hydrogen telluride gas, and the generated hydrogen telluride gas is directly absorbed by the sodium hydroxide solution to form a pure sodium hydride telluride solution with controllable concentration;

[0040] Under strong stirring, inject the sodium telluride hydride solution into the solution containing thioglycolic acid (TGA) stabilizer and cadmium chloride, adjust the pH to 10 with sodium hydroxide, and obtain an orange-yellow transparent CdTe nanocrystal pre...

Embodiment 3

[0044] The present invention in concrete implementation, comprises the following steps:

[0045] (1) Preparation of CdTe quantum dot suspension:

[0046] N 2 Under protection, add 1.27g of tellurium powder and 5.55g of sodium borohydride into 20ml of a mixed solvent of ethanol and water with a volume ratio of 1:2, and heat at 70°C for 20min-40min to make the tellurium powder and sodium borohydride react to form sodium tellurhydride. Then inject 50ml of dilute sulfuric acid with a concentration of 0.1mol / L to convert sodium telluride hydride into hydrogen telluride gas. Sodium hydroxide solution is absorbed to generate a pure sodium hydride telluride solution with a concentration of 0.01mol / L;

[0047] Under stirring, inject 500ml of sodium telluride hydride solution with a concentration of 0.01mol / L into 1.82L-2.2L of an aqueous solution containing 2.2g of thioglycolic acid (TGA) stabilizer and 1.83g of cadmium chloride, and adjust the pH to 10 with sodium hydroxide to obtai...

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Abstract

The invention relates to a flame-retardant anti-counterfeiting paper preparation method, which can effectively solve the problems of easy burning, easy imitating and insufficiently-high fluorescence intensity of the existing anti-counterfeiting paper. The method comprises: under N2 protection, adding tellurium powder and sodium borohydride to ethanol and water, heating, carrying out a reaction to produce sodium tellurium hydride, adding dilute sulfuric acid, absorbing the generated hydrogen telluride by using a sodium hydroxide solution to generate a sodium tellurium hydride solution, injecting the sodium tellurium hydride solution into a thioglycolic acid stabilizer and a cadmium chloride aqueous solution under stirring, carrying out heating reflux, sampling at different reflux times to obtain the suspensions of CdTe quantum dots having different particle sizes and different emission wavelengths, adding a dissolved paper pulp, ammonium polyphosphate, zinc borate, aluminum hydroxide and phosphoric acid to water, respectively adding the CdTe quantum dot suspensions obtained at different reflux times, stirring, carrying out papermaking with a paper machine, and drying to obtain the flame-retardant anti-counterfeiting paper. According to the present invention, the flame-retardant anti-counterfeiting paper has advantages of rich raw material, simple preparation method, easy production, low cost, good anti-counterfeiting effect, good fire resistance, energy saving, and environmental protection.

Description

technical field [0001] The invention relates to papermaking, in particular to a method for preparing flame-retardant and anti-counterfeiting paper. Background technique [0002] With the rapid development of anti-counterfeiting technology, anti-counterfeiting paper has also attracted the attention of scientific researchers. Traditional anti-counterfeiting paper is made by adding organic fluorescent dyes or lanthanide metal complexes. Since paper products are made of fibers, the flammability of the fibers determines the flammability of the paper. Therefore, the current anti-counterfeiting paper is also flammable. Since some important anti-counterfeiting papers must be preserved for a long time, and fire accidents are inevitable, it is necessary to develop flame-retardant anti-counterfeiting papers. However, anti-counterfeiting paper with flame retardant properties has not yet appeared on the market. Two major problems in the preparation of flame-retardant anti-counterfeit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H17/67D21H17/66D21H17/65D21H17/63D21H21/34D21H21/48D21H27/00C09K11/88
CPCC09K11/883D21H17/63D21H17/65D21H17/66D21H17/675D21H21/34D21H21/48D21H27/00
Inventor 刘洁孟艳芳贺文明朱秋荣
Owner 江西中竹生物质科技有限公司
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