A recyclable color development method based on metal-polyphenol network structure

A network structure and metal technology, applied in the fields of printing, printing, and writing, can solve the problems of waste paper that is not easy to decolorize, easy to clog the tip of the pen, and difficult to decolorize the colorant, etc., and achieves a simple and easy treatment method, which is conducive to recycling and good chemistry. The effect of stability

Active Publication Date: 2022-03-11
SHANDONG UNIV
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  • 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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  • A recyclable color development method based on metal-polyphenol network structure
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  • A recyclable color development method based on metal-polyphenol network structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Embodiment 1 can recycle black and white inkjet printing

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

[0046] (2) Dissolve 2g of ferric chloride hexahydrate in 10mL of ethanol to obtain a color-developing ink, and inject the color-developing ink into an empty ink cartridge (HP803) of an ordinary inkjet printer (HP Desk Jet 1112) with a syringe;

[0047] (3) Connect the computer to the printer normally, install the ink cartridge containing the chromogenic ink into the printer, put the dried printing paper treated with the polyphenol solution into the printer 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] Embodiment 2 recyclable color stamps

[0050] (1) 1g of tannic acid is dissolved in 10mL of ethanol, and the polyphenol solution is sprayed on the surface of the adhesive paper in a watering can, and the room temperature is ventilated and dried naturally;

[0051] (2) Add 8 mL of water to two (2-hydroxypropionic acid) diammonium dihydroxide titanium solution (50wt.% aqueous solution, 2 mL); 1 g of copper sulfate pentahydrate and 1 g of ferric chloride hexahydrate are dissolved in In 10mL of water, the colored inks of yellow, brown and black stamps were obtained.

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

Embodiment 3

[0053] Embodiment 3 can recycle soft brush calligraphy, painting

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

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

[0056] (3) Dip black ink with a brush, and perform calligraphy and ink painting on the rice paper processed in step (1) (effects such as image 3 Shown), when you need to add other colors to the painting, replace the brush or clean the brush and dip it in brown or 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. The method adopts a polyphenol solution to spray or infiltrate a substrate, uses a metal salt solution ink as a color development ink, and the metal salt solution ink and the substrate Contact, metal-polyphenol network structure is formed on the substrate in situ and color develops; the substrate that needs to be decolorized and recovered is decolorized with an acid solution, and after the color is eliminated, the excess acid solution on the substrate is removed to realize the reuse of the substrate. The method can be applied to the fields of writing, spraying, stamping and inkjet printing. The color development method of the present invention has high stability after color development, and the color sharpness and density of the finished product after color development are high, and can be processed by conventional decolorizers. Quickly decolorize, realize recycling, easy to operate, environment-friendly, low-cost, high-efficiency, green, and reusable.

Description

Technical field: [0001] The invention relates to a recyclable color development method based on a metal-polyphenol network structure, and belongs 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, paper media with a history of thousands of years is still irreplaceable and plays an indispensable role in people's daily communication, information recording and transmission, and cultural transmission. [0003] Traditional inks widely used in printing are mainly divided into two types: dye ink and pigment ink. 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 produ...

Claims

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Application Information

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Patent Type & Authority Patents(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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