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Preparation method and application of surface SiO2 load modified ardealite fibers papermaking filler

A technology of phosphogypsum and surfactant, which is applied in fiber raw material processing, surfactant addition, papermaking, etc., and can solve problems such as cost disadvantages, low paper retention rate, and easy powder loss

Active Publication Date: 2021-05-11
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still some problems in using phosphogypsum whiskers as paper-making fillers: (1) its water solubility is too large, and 100kg of calcium sulfate whiskers can be dissolved in 400-445kg of water; (2) the retention rate on paper is low , that is, it is easy to lose powder; (3) Compared with the existing widely used mineral paper-making fillers, the cost is slightly inferior

Method used

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  • Preparation method and application of surface SiO2 load modified ardealite fibers papermaking filler
  • Preparation method and application of surface SiO2 load modified ardealite fibers papermaking filler
  • Preparation method and application of surface SiO2 load modified ardealite fibers papermaking filler

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Example 1, see figure 1 .

[0033] (1) Preparation of phosphogypsum fiber powder. Take an appropriate amount of phosphogypsum powder and disperse it in an appropriate amount of water to obtain a suspension with a solid-to-liquid mass ratio of 1:10. Use HCl and NaOH to adjust the pH value of the above dispersion system, and the value is 6.2.

[0034] (2) Subsequently, a surfactant polyethylene glycol (PEG) 200 is added to the system in step (1), and the addition ratio of the surfactant is 1.2 wt%. Subsequently, the above-mentioned phosphogypsum fiber material was prepared through a hydrothermal reaction system, the hydrothermal reaction temperature was 120° C., and the reaction time was 2 hours.

[0035] (3) SiO2 surface loading modification of phosphogypsum fibers. The SiO2 shell loading was achieved by alkaline hydrolysis of tetraethylorthosilicate (TEOS). The steps are: under the protection of a nitrogen atmosphere, add an appropriate amount of phosphogypsum fibe...

Embodiment 2

[0038] Example 2, see figure 1 .

[0039] (1) Preparation of phosphogypsum fiber powder. Take an appropriate amount of phosphogypsum powder and disperse it in an appropriate amount of water to obtain a suspension. The mass ratio of solid to liquid is 1:15. Use HCl and NaOH to adjust the pH value of the above dispersion system, and the value is 7.0.

[0040] (2) Subsequently, a surfactant polyethylene glycol (PEG) 2000 is added to the system in step (1), and the addition ratio of the surfactant is 2.0 wt%. Subsequently, the above-mentioned phosphogypsum fiber material was prepared through a hydrothermal reaction system, the hydrothermal reaction temperature was 140° C., and the reaction time was 6 hours.

[0041](3) SiO2 surface loading modification of phosphogypsum fibers. The SiO2 shell loading was achieved by alkaline hydrolysis of tetraethylorthosilicate (TEOS). The steps are: under the protection of a nitrogen atmosphere, add an appropriate amount of phosphogypsum fib...

Embodiment 3

[0044] Example 3, see figure 1 .

[0045] (1) Preparation of phosphogypsum fiber powder. Take an appropriate amount of phosphogypsum powder and disperse it in an appropriate amount of water to obtain a suspension. The mass ratio of solid to liquid is 1:40. Use HCl and NaOH to adjust the pH value of the above dispersion system, and the value is 8.0.

[0046] (2) Add surfactant polyethylene glycol (PEG) 200-20000 to the system in step (1) subsequently, and the adding ratio of surfactant is 4.5wt%. Subsequently, the above-mentioned phosphogypsum fiber material was prepared through a hydrothermal reaction system, the hydrothermal reaction temperature was 150° C., and the reaction time was 12 hours.

[0047] (3) SiO2 surface loading modification of phosphogypsum fibers. The SiO2 shell loading was achieved by alkaline hydrolysis of tetraethylorthosilicate (TEOS). The steps are: under the protection of a nitrogen atmosphere, add an appropriate amount of phosphogypsum fiber powde...

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Abstract

The invention provides a preparation method and application of a surface SiO2 load modified ardealite fibers papermaking filler. The preparation method comprises the following steps: firstly, preparing ardealite fiber powder, then carrying out SiO2 surface load modification on ardealite fibers, then filtering and separating solid-phase substances in a mixed solution, and carrying out drying treatment. According to the invention, the material is prepared through SiO2 loading modification, and has high particle dispersibility and interface hydrophilic property; in addition, the surface of a SiO2 shell layer is rich in silicon-oxygen bonds and hydroxyl groups, so that the SiO2 shell layer can effectively generate hydrogen bond connection with lignin fibers in paper pulp. The method can be widely applied to the field of papermaking, the powder removal rate of papermaking products is effectively reduced, the mechanical strength of the papermaking products is improved, and the use amount of paper pulp is reduced to a certain extent.

Description

technical field [0001] The invention belongs to the field of preparation of composite inorganic nanometer materials, in particular to a preparation method and application of surface SiO2 loaded modified phosphogypsum fiber papermaking filler. Background technique [0002] Phosphogypsum Phosphogypsum is an industrial solid waste directly produced in the production process of phosphoric acid or phosphate fertilizer. Its main component is CaSO4·2H2O, and its content generally exceeds 90wt% of the phosphogypsum waste residue. The above-mentioned phosphogypsum waste residue has the disadvantages of high viscosity, strong acidity and obvious odor under natural storage conditions. A large amount of phosphogypsum waste slag has not only occupied a large amount of production and construction land, but also caused a large-scale environmental pollution problem due to a large number of heavy metal ions and inorganic salts leached by rainwater. In fact, purified phosphogypsum can be us...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H17/69D21H17/68D21H21/52D21H21/24C01F11/46C01B33/12
CPCD21H17/69D21H17/68D21H21/52D21H21/24C01F11/46C01B33/12C01P2004/10C01P2004/80C01P2004/04Y02W30/64
Inventor 程杨荣高琪邹涛吴魁刘义
Owner WUHAN UNIV OF SCI & TECH
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