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Paper protection method for improving surface hydrophobicity

A hydrophobic, paper-like technology, used in papermaking, paper coating, physical treatment of paper, etc., can solve the problems of ink marks, dyes, information damage on paper surface, complicated processing technology, etc., and achieve stable hydrophobicity and easy operation. , the effect of simple process

Inactive Publication Date: 2021-02-02
HANGZHOU ZHONGCAI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The treatment processes of the above-mentioned methods are relatively complicated, and most of them are aimed at the hydrophobic modification of the papermaking stage and paper before writing and printing. There are certain limitations in the modification of the paper that has been written or printed. Paper information causes certain damage
And the above modification methods all rely on the hydrophobic groups of organic substances applied on the paper surface, but during use, these hydrophobic groups may react and denature, resulting in poor hydrophobicity, and the application of organic substances will affect Ink, dye, etc. on the surface of the paper, changing the original appearance of the paper

Method used

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  • Paper protection method for improving surface hydrophobicity
  • Paper protection method for improving surface hydrophobicity
  • Paper protection method for improving surface hydrophobicity

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] The filter paper to be treated (double circled filter paper, Waterman Company) was activated with cold plasma, which was generated by air dielectric barrier discharge, with a power supply voltage of 80V and a current of 0.25A. Then soak the filter paper in 0.5 mol / L sodium hydroxide solution to provide an alkaline environment on the surface of the paper, then apply 0.2 mol / L zinc acetate dihydrate solution to the paper, and react for 15 minutes to generate zinc oxide Precursor, and finally put the treated paper into an oven at 80°C for dehydration reaction for 12 hours, so that the zinc oxide precursor on the surface of the paper is dehydrated to form zinc oxide crystals.

[0041] The SEM picture of the filter paper / zinc oxide composite material prepared in this embodiment is as follows figure 1 As shown, it can be seen that the flaky zinc oxide is uniformly distributed on the paper fiber surface, this is because after the paper is pretreated by plasma activation, the s...

Embodiment 2

[0048] The filter paper to be treated (double delimitation filter paper, Waterman company) is soaked in the sodium hydroxide solution of 0.5mol / L, provides an alkaline environment on the paper surface, and then the dihydrate zinc acetate of 0.2mol / L The solution was applied to the paper and reacted for 15 minutes to form a zinc oxide precursor. Finally, the treated paper was placed in an oven at 80°C for 12 hours for dehydration to dehydrate the zinc oxide precursor on the surface of the paper to form zinc oxide crystals.

[0049] The SEM picture of the filter paper / zinc oxide composite material prepared in this embodiment is as follows figure 2 As shown, since the paper has not been pretreated by plasma activation, it can be seen that the distribution of zinc oxide on the paper fibers is not uniform, and the loading amount of zinc oxide is not much compared to that of Example 1.

[0050] Performance Testing:

[0051] Get the untreated filter paper of the same type as in Exa...

Embodiment 3

[0056] The concentration of the zinc acetate dihydrate solution in Example 1 was adjusted to 0.1 mol / L, and the rest of the steps were the same as in Example 1.

[0057] The SEM of the filter paper / zinc oxide composite material finally prepared after the treatment of embodiment 3 is as follows: image 3 As shown, it can be seen that the morphology of the final loaded zinc oxide is similar to that of Example 1, but due to the low concentration of the zinc source solution, zinc oxide lacks power in the process of nucleation and growth, and most of the loaded zinc oxide does not completely form a sheet shape, eventually leading to a decrease in the contact angle of the filter paper with the aqueous solution after loading zinc oxide compared with Example 1.

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Abstract

The invention provides a paper protection method for improving surface hydrophobicity. The paper protection method comprises the following steps: 1) soaking paper with an alkaline solution; 2) applying a zinc acetate dehydrate solution to the paper, and reacting on the surface of the paper to generate a zinc oxide precursor; and 3) carrying out dehydration reaction on the treated paper at 70-85 DEG C to obtain the paper with flaky zinc oxide on the surface. According to the method, sheet-shaped zinc oxide crystals in a specific form are loaded on paper fibers to improve the hydrophobicity of the surface of the paper, so that the hydrophobicity of the surface of the paper can be improved under the condition that ink marks, pigments and paper bodies on the surface of the paper are not damaged.

Description

technical field [0001] The application relates to the field of paper surface treatment, in particular to a paper protection method for improving surface hydrophobicity. Background technique [0002] Paper has a long history. The use of paper in our country can be traced back to more than 2,000 years ago. Since the invention of papermaking, paper has been widely used in human daily life, such as calligraphy and painting, printing books and newspapers, and packaging. The main component of paper is cellulose molecules, and there are a large number of hydrophilic groups on the cellulose molecular chains, so the surface of paper usually presents a certain degree of hydrophilicity. Under normal circumstances, the moisture content of the paper body is about 10%. If the moisture content is too low, the paper body is prone to embrittlement and fracture. However, in some humid environments, the moisture content in the paper is too high, which is not conducive to the writing and print...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H25/06D21H25/02D21H19/14
CPCD21H25/06D21H25/02D21H19/14
Inventor 张溪文陈炳铨施文正徐绍艳
Owner HANGZHOU ZHONGCAI TECH CO LTD
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