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Preparation method of special carbon black water-phase dispersion liquid for fruit cultivating bag paper

A technology for growing fruit bag paper and carbon black water, applied in chemical instruments and methods, papermaking, paper coatings, etc., can solve problems such as unevenness, loss and dispersion of carbon black, and achieve improved uniformity, low production cost, and simple operation. Effect

Active Publication Date: 2021-03-26
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the serious loss and uneven dispersion of carbon black in slurry / coating, the present invention provides a method for preparing a special carbon black aqueous phase dispersion liquid for fruit bag paper. phase dispersion stability

Method used

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  • Preparation method of special carbon black water-phase dispersion liquid for fruit cultivating bag paper
  • Preparation method of special carbon black water-phase dispersion liquid for fruit cultivating bag paper
  • Preparation method of special carbon black water-phase dispersion liquid for fruit cultivating bag paper

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Prepare sodium lauroyl sarcosinate solution: Dissolve 0.6 wt.% (to absolute dry carbon black) sodium lauroyl sarcosinate in 40 ml deionized water, adjust the pH to 8.0~8.5, 1200 r / min Stir at a shear rate for 15 min to obtain a sodium lauroyl sarcosinate solution;

[0029] (2) Preparation of hydroxypropyl methylcellulose solution: Dissolve 1.4 wt.% (to absolute dry carbon black) of hydroxypropyl methylcellulose in 40 ml of deionized water, adjust the pH to 8.0-8.5, 1200 r Stir 15 min under the shear speed of / min, obtain hydroxypropyl methylcellulose solution;

[0030] (3) Preparation of dispersant: Mix the sodium lauroyl sarcosinate solution obtained in step (1) with the hydroxypropyl methylcellulose solution obtained in step (2), adjust the pH to 8.0~8.5, and Continue stirring for 30 min under the min shear rate to obtain a dispersant;

[0031] (4) Preparation of carbon black aqueous dispersion: Add carbon black to the dispersant prepared in step (3), continue s...

Embodiment 2

[0033] (1) Prepare sodium lauroyl sarcosinate solution: Dissolve 0.8 wt.% (relative to absolute dry carbon black) sodium lauroyl sarcosinate in 40 ml deionized water, adjust the pH to 8.0~8.5, 1200 r / min Stir at a shear rate for 15 min to obtain a sodium lauroyl sarcosinate solution;

[0034] (2) Preparation of hydroxypropyl methylcellulose solution: Dissolve 1.2 wt.% (relative to absolute dry carbon black) of hydroxypropyl methylcellulose in 40 ml of deionized water, adjust the pH to 8.0~8.5, 1200 r Stir 15 min under the shear speed of / min, obtain hydroxypropyl methylcellulose solution;

[0035] (3) Preparation of dispersant: Mix the sodium lauroyl sarcosinate solution obtained in step (1) with the hydroxypropyl methylcellulose solution obtained in step (2), adjust the pH to 8.0~8.5, and Continue stirring for 30 min under the min shear rate to obtain a dispersant;

[0036] (4) Preparation of carbon black aqueous dispersion: Add carbon black to the dispersant prepared in st...

Embodiment 3

[0038] (1) Prepare sodium lauroyl sarcosinate solution: Dissolve 1.0 wt.% (relative to absolute dry carbon black) sodium lauroyl sarcosinate in 40 ml deionized water, adjust the pH to 8.0~8.5, 1200 r / min Stir at a shear rate for 15 min to obtain a sodium lauroyl sarcosinate solution;

[0039] (2) Preparation of hydroxypropyl methylcellulose solution: Dissolve 1.0 wt.% (to absolute dry carbon black) of hydroxypropyl methylcellulose in 40 ml of deionized water, adjust the pH to 8.0-8.5, 1200 r Stir 15 min under the shear speed of / min, obtain hydroxypropyl methylcellulose solution;

[0040] (3) Preparation of dispersant: Mix the sodium lauroyl sarcosinate solution obtained in step (1) with the hydroxypropyl methylcellulose solution obtained in step (2), adjust the pH to 8.0~8.5, and Continue stirring for 30 min under the min shear rate to obtain a dispersant;

[0041] (4) Preparation of carbon black aqueous dispersion: Add carbon black to the dispersant prepared in step (3), c...

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Abstract

The invention relates to a preparation method of a special carbon black water-phase dispersion liquid for fruit cultivating bag paper, and belongs to the field of functional pigments for papermaking coatings. Based on the DLVO dispersion stability theory, the electrostatic interaction formed by sodium lauroyl sarcosine and the steric hindrance effect formed by hydroxypropyl methyl cellulose are innovatively utilized, the synergistic effect of sodium lauroyl sarcosine and hydroxypropyl methyl cellulose is fully exerted by optimizing the dispersion process, and the high-stability carbon black water-phase dispersion liquid is prepared. The raw materials are environment-friendly, pollution-free and wide in source and are environment-friendly materials, so that the synthesized dispersing agentis environment-friendly and safe, the environment-friendly property of the dispersing agent is guaranteed from the source, and the trend requirement of modern environmental protection is met; the carbon black water-phase dispersion liquid prepared on the basis of the method is uniform and stable in dispersion, and good conditions are created for subsequent functional application.

Description

technical field [0001] The invention relates to the field of functional pigments for papermaking coatings, in particular to a method for preparing a special carbon black aqueous phase dispersion liquid for fruit bag paper. Background technique [0002] As a high value-added agricultural technical paper, fruit bag paper is more and more widely used in my country. The black layer of fruit bag paper is dyed with carbon black to improve the ability to shield light and improve fruit quality. [0003] There are two main methods for preparing the black layer paper of fruit bag paper: one is the wet end forming method, which mainly deposits carbon black and other fillers between or on the surface of plant fibers by physical and / or chemical methods, and passes through the traditional wet end forming method. Forming technology to obtain a thin layer of paper with a certain strength; second, the surface coating method, with fillers such as carbon black as the main raw material, supplem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/56C09C1/58C09C3/04C09C3/08C09C3/10D21H17/69D21H19/38D21H19/42
CPCC09C1/56C09C1/58C09C3/006C09C3/04C09C3/08C09C3/10D21H17/69D21H19/38D21H19/42
Inventor 唐艳军黄梦乐周益名陈天影朱先梅
Owner ZHEJIANG SCI-TECH UNIV
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