Zirconium-modified cationic silica sol and preparation method thereof
A cationic, silica sol technology, applied in chemical instruments and methods, silicon compounds, inorganic chemistry, etc., can solve problems such as the limitations of compound application of cationic systems, improve thermal stability, simple preparation process, and construction process. safe effect
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Embodiment 1
[0037] A preparation method of zirconium-modified cationic silica sol, comprising steps as follows:
[0038] (1) ZrOCl 2 ·8H 2 O was dissolved in water to produce ZrOCl with a mass fraction of 20% 2 ·8H 2 O aqueous solution.
[0039] (2) Alkaline silica sol (pH=9.17, SiO 2 Particle size 10nm, SiO 2 The mass fraction is 40%, Na 2 The mass fraction of O is 0.3%) adding ZrOCl in one go 2 ·8H 2 Stir and mix in O aqueous solution, in which ZrOCl 2 ·8H 2 The mass ratio of O aqueous solution to alkaline silica sol is 1:2.3; then heated to 70°C and reacted for 1 hour to obtain zirconium-modified cationic silica sol.
[0040] Detect the index of the modified silica sol obtained in this embodiment (see attached table 1 for details), pH value=1.02, SiO 2 Particle size is 10nm, SiO 2 The mass fraction of 28%. The Zeta potential diagrams of silica sol before and after modification are as follows: figure 1 , 2 As shown, the Zeta potential value of the alkaline silica sol befo...
Embodiment 2
[0042] A preparation method of zirconium-modified cationic silica sol, comprising steps as follows:
[0043] (1) ZrOCl 2 ·8H 2 O was dissolved in water to produce ZrOCl with a mass fraction of 20% 2 ·8H 2 O aqueous solution.
[0044] (2) Alkaline silica sol (pH=9.50, SiO 2 Particle size is 24nm, SiO 2 The mass fraction is 40%, Na 2 The mass fraction of O is 0.22%) adding ZrOCl in one go 2 ·8H 2 Stir and mix in O aqueous solution, in which ZrOCl 2 ·8H 2 The mass ratio of O aqueous solution to alkaline silica sol is 1:7.6; then heated to 70°C and reacted for 1 hour to obtain zirconium-modified cationic silica sol.
[0045] Detect the index of silica sol modified in this embodiment (see attached table 1 for details), pH value=2.05, SiO 2 The particle size is 24nm, SiO 2 The mass fraction is 35%. The Zeta potential diagrams of silica sol before and after modification are as follows: image 3 , 4 As shown, the Zeta potential value of silica sol before modification is...
Embodiment 3
[0047] A preparation method of zirconium-modified cationic silica sol, comprising steps as follows:
[0048] (1) ZrOCl 2 ·8H 2 O was dissolved in water to produce ZrOCl with a mass fraction of 20% 2 ·8H 2 O aqueous solution.
[0049] (2) Alkaline silica sol (pH=10.71, SiO 2 The particle size is 106nm, SiO 2 The mass fraction is 40%, Na 2 The mass fraction of O is 0.25%) adding ZrOCl in one go 2 ·8H 2 Stir and mix in O aqueous solution, in which ZrOCl 2 ·8H 2 The mass ratio of O aqueous solution to alkaline silica sol is 1:10; then heated to 70°C and reacted for 1 hour to obtain zirconium-modified cationic silica sol.
[0050] Detect the index of silica sol modified in this embodiment (see attached table 1 for details), pH value=2.45, SiO 2 Particle size 106nm, SiO 2 The quality score is 36%. The Zeta potential diagrams of silica sol before and after modification are as follows: Figure 5 , 6 As shown, the Zeta potential value of silica sol before modification is...
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