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Method for preparing nano TiO2/wollastonite compound used for papermaking

A wollastonite and composite technology, which is applied in the field of preparation of nano-TiO2/wollastonite composites for papermaking, can solve the problems of easy agglomeration and coating effect, high cost of composite particles, unsuitable for industrial application, and poor performance, and achieves weather resistance. Good performance, high output, uniform coating effect

Active Publication Date: 2019-01-11
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a kind of nano-TiO 2 The preparation method of the wollastonite composite is used to solve the problem that nano-rutile titanium dioxide is easy to agglomerate during coating and the coating effect is not good when preparing titanium dioxide-coated wollastonite composite particles in the prior art; the precursor is hydrolyzed and calcined The technical problem of preparing titanium dioxide-coated wollastonite composite particles is high in cost and unsuitable for industrial application

Method used

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  • Method for preparing nano TiO2/wollastonite compound used for papermaking
  • Method for preparing nano TiO2/wollastonite compound used for papermaking
  • Method for preparing nano TiO2/wollastonite compound used for papermaking

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Add 30g of wollastonite to 270ml of distilled water to prepare a 10% slurry, filter through a 200-mesh screen, add 1.5g of rutile titanium dioxide, 0.01g of dispersant PEG-1000, 5g of sodium hydroxide, stir in a water bath at 50°C for 30min, and then The slurry was transferred to a quartz glass carbonization tube, and air and CO were introduced in a water bath at 50°C. 2 Mix the gas with a volume ratio of 2:1 to pH = 7 to obtain a white slurry. After vacuum filtration, place it in an oven at 80°C for 12 hours to obtain nano-TiO 2 / wollastonite composite products. The whiteness value of the obtained product was 92.2, and the yield was 88.49%. The obtained compound was used as the main filler of paper in papermaking, and the whiteness of the obtained paper was 81.3, the hiding power was 90.5, and the tearing degree was 16mN.

Embodiment 2

[0038] Add 30g of wollastonite to 270ml of distilled water to prepare a 10% slurry, filter through a 200-mesh screen, add 3g of rutile titanium dioxide, 0.01g of dispersant PEG-1000, 5g of sodium hydroxide, stir in a water bath at 50°C for 30min, and then dissolve the slurry Transfer to a quartz glass carbonization tube, and pass air and CO under the condition of a 50°C water bath 2 Mix the gas with a volume ratio of 2:1 to pH = 7 to obtain a white slurry. After vacuum filtration, place it in an oven at 80°C for 12 hours to obtain nano-TiO 2 / wollastonite composite products. The whiteness value of the obtained product was 92.8, and the yield was 90.66%. The obtained compound is used as the main filler of paper in papermaking, and the whiteness of the obtained paper is 82.1, the hiding power is 91.2, and the tearing degree is 40mN.

Embodiment 3

[0040] Add 30g of wollastonite to 270ml of distilled water to prepare a 10% slurry, filter through a 200-mesh screen, add 4.5g of rutile titanium dioxide, 0.01g of dispersant PEG-1000, 5g of sodium hydroxide, stir in a water bath at 50°C for 30min, and then The slurry was transferred to a quartz glass carbonization tube, and air and CO were introduced in a water bath at 50°C. 2 Mix the gas with a volume ratio of 2:1 to pH = 7 to obtain a white slurry. After vacuum filtration, place it in an oven at 80°C for 12 hours to obtain nano-TiO 2 / wollastonite composite products. The whiteness value of the obtained product was 93.3, and the yield was 91.85%. The obtained compound was used as the main filler of paper in papermaking, and the whiteness of the obtained paper was 86.4, the hiding power was 91.8, and the tearing degree was 48mN.

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Abstract

The invention relates to a method for preparing nano TiO2 / wollastonite compound used for papermaking, which belongs to the technical field of inorganic synthesis. The invention discloses a new methodwhich is not reported yet, and the method successfully synthesizes a novel nano TiO2 / wollastonite compound product with uniform coating, and the properties of the compound product can reach the standard. The compound product obtained by the preparation method is in a plate-like structure, and has the characteristics of high whiteness, uniform coating and good weather resistance. When the obtainedcompound product is used as a papermaking filler, the properties of the paper are similar to those of titanium dioxide as a filler. The production process of the invention is simple, and the rate forintroducing gas and the addition amount of titanium dioxide can be controlled, so that the size of the titanium dioxide particles and the coating rate of wollastonite can be adjusted, the wollastonitesurface is uniformly coated, the yield is high, the reaction condition is mild, and industrial production is easy to be realized.

Description

technical field [0001] The invention belongs to the technical field of inorganic synthesis, in particular to a kind of nano-TiO for papermaking 2 / Wollastonite composite preparation method. Background technique [0002] TiO 2 It has the characteristics of high whiteness, high refractive index, and high hiding power. It is a kind of pigment with high optical properties and plays an important role in the field of papermaking. TiO 2 Applied in paper, it can not only enhance the physical strength of paper, but also improve the whiteness and opacity of paper, and enhance the softness of paper. It is a kind of advanced paper-making filler, but due to the high price of titanium dioxide, it is only used in high-grade paper. use. For this reason people try to find the substitute product of titanium dioxide. Wollastonite belongs to a kind of metasilicate with fibrous, needle-like and plate-like shapes, and its special crystal shape and structure determine its properties. Wollast...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H17/69C09C1/28C09C3/06
CPCC09C1/28C09C3/06D21H17/69
Inventor 周兵樊青秋李晓琪郭立杰
Owner JILIN UNIV
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