Preparation method and application of nano TiO2 opal compound for improving paper performance

An opal and composite technology, which is applied in the field of preparation of nano-TiO2/opal composites, can solve problems such as poor dispersibility of large-scale agglomerated composites, achieve good industrial production value and application prospects, high whiteness, and weather resistance. Good results

Inactive Publication Date: 2021-08-13
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a preparation method and application of a nano-TiO2 / opal composite that improves the performance of paper, so as to solve the technical problems of large-scale agglomeration and poor dispersion of the composite in the composite process of nano-rutile titanium dioxide and opal

Method used

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  • Preparation method and application of nano TiO2 opal compound for improving paper performance
  • Preparation method and application of nano TiO2 opal compound for improving paper performance
  • Preparation method and application of nano TiO2 opal compound for improving paper performance

Examples

Experimental program
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Effect test

Embodiment 1

[0028] Add 30g of opal to 100ml of distilled water, stir at 35°C for 30min to form a slurry, filter through a 200-mesh screen, add 1.5g of rutile titanium dioxide, 0.03g of dispersant PEG-1000, transfer to a quartz glass tube, and place it in a water bath at 35°C Add air flow (vN2:vCO2=2:1) ​​and continue to stir for 1 hour to obtain a white slurry. After vacuum filtration, place it in an oven at 80°C for 12 hours to obtain TiO 2 / opal composite product. The whiteness of the obtained composite was 86.6.

Embodiment 2

[0030] Add 30g of opal to 100ml of distilled water, stir at 35°C for 30min to form a slurry, filter through a 200-mesh screen, add 3.0g of rutile titanium dioxide, 0.03g of dispersant PEG-1000, transfer to a quartz glass tube, and place it in a water bath at 35°C Add air flow (vN2:vCO2=2:1) ​​and continue to stir for 1 hour to obtain a white slurry. After vacuum filtration, place it in an oven at 80°C for 12 hours to obtain TiO 2 / opal composite product. The whiteness of the obtained composite was 87.1.

Embodiment 3

[0032] Add 30g of opal to 100ml of distilled water, stir at 35°C for 30min to form a slurry, filter through a 200 mesh screen, add 4.5g of rutile titanium dioxide, 0.03 dispersant PEG-1000, transfer to a quartz glass tube, and place it in a water bath at 35°C. Into the air flow (vN2:vCO2 = 2:1) and continue to stir for 1h to obtain a white slurry. After vacuum filtration, place it in an oven at 80°C for 12h to obtain TiO 2 / opal composite product, the whiteness of the obtained composite is 89.5.

[0033] The compound gained in embodiment 3 is carried out ultraviolet absorption test, from Figure 5 It can be seen that rutile titanium dioxide exhibits a strong ultraviolet absorption ability in the wavelength range of 200-400nm, and the ultraviolet absorption ability of opal in this range is far less than that of rutile titanium dioxide, but it can be clearly seen by depositing titanium dioxide on the surface of opal. Improve its UV absorption capacity.

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Abstract

The invention relates to a preparation method and application of a nano TiO2 / opal compound for improving paper performance, and belongs to the technical field of inorganic synthesis. The preparation method comprises the following steps: adding dispersing agents PEG (polyethylene glycol) and titanium dioxide into opal slurry, conducting heating in a water bath at 35 DEG C, and conducting stirring by air flow to prepare a TiO2 / opal compound with good dispersity and a good deposition state. The TiO2 / opal compound has the characteristics of high whiteness, high ultraviolet absorption intensity, good weather resistance and the like. The compound can be used as a papermaking filler to improve the covering power of paper. The preparation method is simple in operation process, mild in reaction condition and low in equipment requirement, and has very good industrial production value and application prospect.

Description

technical field [0001] The invention belongs to the technical field of inorganic synthesis, and in particular relates to a nano-TiO which can improve the performance of paper 2 / Preparation method of opal composite and its application. Background technique [0002] Opal is mainly an active mineral material composed of silica crystals and colloids. Opal has high porosity, good adsorption and strong water absorption. It has low density and stable chemical properties. It can be used in many fields such as coatings and building materials. , is a green and environmentally friendly material. TiO 2 It has the characteristics of high whiteness, good refractive index, and high hiding power. It is a good paper-making filler. Rutile TiO 2 The refractive index is 2.7. With a much higher index of refraction than any other mineral, the high contrast between the index of refraction of rutile titanium dioxide and the other components of paper makes this mineral particularly effective ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/28C09C1/36C09C3/06C09C3/10D21H21/14
CPCC09C1/28C09C1/3653C09C3/006C09C3/063C09C3/10D21H21/14
Inventor 周兵张丽李政昊
Owner JILIN UNIV
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