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Recyclable color development method based on metal-polyphenol network structure

A network structure, metal technology, applied in the fields of printing, writing, and printing, can solve the problems of color density and sharpness limitation, high cost, precipitation, etc., to achieve high color sharpness and density, easy operation, and high stability. Effect

Active Publication Date: 2019-06-14
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Dye ink is widely used because of its good fluency and bright colors in use. The disadvantages of this type of ink are: poor optical stability, chemical stability and water resistance, and the color density and color of the finished product printed with dye ink Sharpness is limited, and its color will fade or even lose its color over time
The tannins in traditional iron tannin inks come from natural plants, the cost of raw materials is high, the processing technology is complicated, the quality of the prepared ink is not easy to control, and this type of ink is prone to precipitation during long-term storage, and it is easy to block the tip of the pen when writing, affecting the quality of writing. feel and effect
[0005] At present, whether it is applied to writing, marking or printing, the colorants selected by traditional dye inks, pigment inks and iron tannate inks are difficult to decolorize, the colorants are difficult to degrade, and it is difficult to decolorize and modify when writing is wrong. Therefore, using traditional ink for writing and printing is often not reusable, and waste paper is not easy to decolorize when recycled
This not only leads to high costs, but also causes a series of environmental pollution problems

Method used

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  • Recyclable color development method based on metal-polyphenol network structure
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  • Recyclable color development method based on metal-polyphenol network structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Example 1 Recyclable black and white inkjet printing

[0045] (1) Dissolve 1g of tannic acid in 10mL of ethanol, polyphenol solution, put the polyphenol solution in a watering can and spray it onto the surface of A4 printing paper, and let it dry naturally at room temperature;

[0046] (2) 2g ferric chloride hexahydrate is dissolved in the ethanol of 10mL, obtains color developing ink, and the color developing ink is injected in the empty ink cartridge (HP803) of common ink jet printer (HP Desk Jet 1112) with syringe;

[0047] (3) Connect the computer and the printer normally, install the color ink cartridge into the printer, put the dried printing paper treated with the polyphenol solution into the printer's paper storage box, select the document to be printed, and print in black and white.

[0048] The printing effect of embodiment 1 is as follows figure 1 shown.

Embodiment 2

[0049] Example 2 Recyclable color stamps

[0050] (1) 1g of tannic acid was dissolved in 10mL of ethanol, polyphenol solution, the polyphenol solution was installed in a watering can and sprayed onto the surface of the self-adhesive paper, and air-dried at room temperature;

[0051] (2) Add 8 mL of water to bis(2-hydroxypropionic acid) diammonium dihydroxide titanium complex solution (50wt.% aqueous solution, 2 mL); dissolve 1 g of copper sulfate pentahydrate and 1 g of ferric trichloride hexahydrate into In 10 mL of water, color inks of yellow, brown and black stamps were obtained.

[0052] (3) Use a brush to apply different color developing inks to the surface of the dry stamp respectively, and then print clear icons of corresponding colors on the above-mentioned adhesive paper treated with tannin acid. stamp effect figure 2 shown.

Embodiment 3

[0053] Embodiment 3 can recycle soft pen calligraphy and painting

[0054] (1) 1g of tannic acid was dissolved in 10mL of ethanol, polyphenol solution, the polyphenol solution was installed in a watering can and sprayed onto the surface of the rice paper, and it was ventilated and dried at room temperature;

[0055] (2) 1.5g ferric chloride hexahydrate, 1.5g copper sulfate pentahydrate (dissolved in 10mL water / ethanol mixed solution with 10% ethanol volume fraction respectively; bis(2-hydroxypropionic acid) dihydrogen 7mL of water was added to the diammonium oxide titanium solution (50wt.% aqueous solution, 3mL) to obtain black, brown and yellow color inks respectively;

[0056] (3) Dip black ink with a writing brush, and create calligraphy and ink painting on the rice paper treated in step (1) (effects such as image 3 shown), when you need to add other colors to the painting, replace the brush or wash the brush and dip it in brown and yellow ink for use.

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Abstract

The invention relates to a recyclable color development method based on a metal-polyphenol network structure. According to the method, a polyphenol solution is used for performing spray coating or soaking treatment on a substrate; metal salt solution ink is used as color development ink; the metal salt solution ink is in contact with the substrate; a metal-polyphenol network structure is formed insitu on the substrate; color development is performed; the substrate requiring decoloring recovery is subjected to decoloring by an acid solution; after the color development elimination, excessive acid solution on the substrate is removed; the repeated utilization of the substrate is realized. The method can be applied to the fields of writing, spray coating, stamps and ink spraying printing. The color development stability of the color development method is high; after the color development, the color sharpness and the density of a finished product are high; the fast decoloring can be performed by using conventional decoloring agents; the cyclic utilization is realized; the operation is simple and convenient; the implementation is easy; the environment-friendly effect is good; the effects of low cost, high efficiency, green effect and repeated utilization are achieved.

Description

Technical field: [0001] The invention relates to a recyclable color developing method based on a metal-polyphenol network structure, belonging to the technical fields of printing, printing and writing. Background technique: [0002] With the rapid development of science and technology, we have entered the era of electronic information technology, and various electronic media have been widely used in people's daily life. However, the thousand-year-old paper medium is still irreplaceable and occupies an indispensable position in people's daily communication, information recording and transmission, and cultural transmission. [0003] At present, traditional inks widely used in printing are mainly divided into two types: dye inks and pigment inks. Dye inks are widely used due to their good fluency in use and bright colors. The disadvantages of such inks are: poor optical stability, chemical stability and water resistance, and the color density and color density of the finished ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D11/16C09D11/32C09D11/037C09D11/03C09D9/00
Inventor 崔基炜戴琼郝京诚
Owner SHANDONG UNIV
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