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A kind of preparation method and application of carbon quantum dot light stabilizer

A technology of carbon quantum dots and light stabilizers, which is applied in the field of preparing carbon quantum dot light stabilizers for paper by hydrothermal method, can solve the problems of poor light resistance, poor water solubility, low yield, etc., and achieves photo-induced yellowing of paper. The effect of suppressing and improving initial whiteness and good application prospects

Active Publication Date: 2017-08-04
SHAANXI UNIV OF SCI & TECH
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Problems solved by technology

But there are also certain disadvantages. First, from the perspective of molecular structure, light stabilizers are organic compounds with aromatic structures, and their water solubility is poor.
Second, poor structural stability and poor light resistance
Third, most of them have certain toxicity, which poses a huge threat to the ecological environment and human health
This method uses biomass as a carbon source, and uses strong acid and strong base to prepare carbon quantum dots through a top-down method. During the preparation process, a large amount of waste acid and waste alkali are produced, which has a certain impact on the environment.
Carbon quantum dots are prepared from biomass resources through a top-down method, and the particle size distribution of the obtained carbon quantum dots is uneven and the yield is low

Method used

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  • A kind of preparation method and application of carbon quantum dot light stabilizer
  • A kind of preparation method and application of carbon quantum dot light stabilizer
  • A kind of preparation method and application of carbon quantum dot light stabilizer

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preparation example Construction

[0029] The invention provides a preparation method of a carbon quantum dot light stabilizer.

[0030] 1. Preparation method

Embodiment 1

[0032] Step 1, weigh 1.26g of citric acid and dissolve it in 30mL of deionized water, stir and mix evenly at room temperature (10min) to obtain a precursor solution (citric acid concentration: 0.2mol / L).

[0033] Step 2: Place the precursor solution in a p-polyphenylene-lined hydrothermal reactor, raise the temperature to 200°C in an oven, keep it warm for 5 hours, and then cool it naturally to room temperature to obtain a carbon quantum dot solution.

[0034] Step 3, 0.2g 2,2,6,6-tetramethylpiperidinamine was added to the carbon quantum dot solution, and magnetically stirred and mixed uniformly (10min) at room temperature to obtain solution A (2,2,6,6- The concentration of tetramethylpiperidinamine is 0.04mol / L).

[0035] Step 4: Place the solution A in a p-polyphenylene-lined hydrothermal reaction kettle, raise the temperature to 180°C in an oven, keep it warm for 1 hour, and then cool it naturally to room temperature to obtain a modified carbon quantum dot solution.

[003...

Embodiment 2

[0044] Step 1: Dissolve 0.55g of oxalic acid in 30mL of deionized water, stir and mix evenly (10min) at room temperature to obtain a precursor solution (oxalic acid concentration: 0.2mol / L).

[0045] Step 2: Place the precursor solution in a p-polyphenylene-lined hydrothermal reactor, raise the temperature to 220°C in an oven, keep it warm for 5 hours, and then cool it naturally to room temperature to obtain a carbon quantum dot solution.

[0046] Step 3, 0.2g 2,2,6,6-tetramethylpiperidinamine was added to the carbon quantum dot solution, and magnetically stirred and mixed uniformly (10min) at room temperature to obtain solution A (2,2,6,6- The concentration of tetramethylpiperidinamine is 0.04mol / L).

[0047] Step 4: Place the solution A in a p-polyphenylene-lined hydrothermal reaction kettle, raise the temperature to 180°C in an oven, keep it warm for 1 hour, and then cool it naturally to room temperature to obtain a modified carbon quantum dot solution.

[0048] Step 5, adju...

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Abstract

The invention discloses a preparation method and application of a carbon quantum dot light stabilizer. Cheap organic carboxylic acid is adopted as a carbon source, piperylhydrazine is adopted as a modifier, and a carbon quantum dot is synthesized and modified to obtain a nitrogen-doped carbon quantum dot containing a radical scavenger fragment by hydrothermal reaction. The prepared carbon quantum dot light stabilizer is light in color and high in water solubility and light fastness, and has broad application prospect, and when the carbon quantum dot light stabilizer is applied to paper pattern coating as a high-yield pulp paper light stabilizer, a result shows that the carbon quantum dot light stabilizer has a certain inhibition effect on light-induced color reversion of paper and the initial whiteness of the paper can be improved.

Description

technical field [0001] The invention relates to the field of high-yield pulp light stabilizers, in particular to a method and application of a carbon quantum dot light stabilizer for paper prepared by a hydrothermal method. Background technique [0002] With the improvement of people's living standards, the demand for paper products continues to rise. At the same time, the area of ​​forests used for papermaking is constantly shrinking, and the problem of shortage of raw materials has become increasingly prominent, which has become one of the important factors restricting the sustainable development of the global papermaking industry. For this reason, how to make full use of forest resources to obtain low-cost, high-brightness, good-quality high-yield pulp has been paid more and more attention by papermaking researchers. [0003] High-yield mechanical pulp has the advantages of high yield, less environmental pollution, and low cost. However, high-yield pulp retains a large a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21H21/30
CPCD21H21/30
Inventor 张光华王子儒郭明媛赵馨王彬
Owner SHAANXI UNIV OF SCI & TECH
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