Catalyst-loaded polyvinyl alcohol vortex ring derivative particles
A technology of supporting catalyst and polyvinyl alcohol, applied in physical/chemical process catalyst, catalytic reaction, organic compound/hydride/coordination complex catalyst, etc. Short mass transfer channels, no irritating effects
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Embodiment 1
[0038] (1) Add 10g of polyvinyl alcohol, 1g of boric acid, and 0.0512g of silver nanoparticles into 89g of water, stir and dissolve completely at 90°C and cool to room temperature to obtain a pre-crosslinking solution;
[0039] (2) Place the pre-crosslinking solution in a syringe and hang it vertically above the sodium hydroxide aqueous solution at a constant temperature of 30 ° C and pH = 10. The vertical height of the needle end of the syringe from the liquid surface of the sodium hydroxide aqueous solution is 6 cm, and then The pre-crosslinking solution is added dropwise into the sodium hydroxide aqueous solution, and the catalyst-loaded polyvinyl alcohol swirl ring-derived particles are collected. It looks like figure 1 As shown, the catalyst-loaded polyvinyl alcohol vortex ring-derived particles prepared in Example 1 are recyclable, and can quickly de-crosslink under acidic conditions of pH=3. The specific process is as follows Figure 8 As shown, in addition, the cataly...
Embodiment 2
[0041] (1) Add 5g of polyvinyl alcohol, 0.2g of boric acid, and 0.0424g of palladium nanoparticles into 89.9g of water, stir and dissolve completely at 90°C and cool to room temperature to obtain a pre-crosslinking solution;
[0042] (2) Place the pre-crosslinking solution in a syringe and hang it vertically above the potassium hydroxide aqueous solution at a constant temperature of 25°C and pH=11. The pre-crosslinking solution was added dropwise to the aqueous sodium hydroxide solution, and the catalyst-loaded polyvinyl alcohol vortex ring-derived particles were collected, whose shape and structure were as follows: figure 2 shown.
Embodiment 3
[0044] (1) Add 6g of polyvinyl alcohol, 0.24g of boric acid, and 0.078g of platinum nanoparticles into 89.9g of water, stir and dissolve completely at 90°C and cool to room temperature to obtain a pre-crosslinking solution;
[0045] (2) Place the pre-crosslinking solution in a syringe and hang it vertically above the sodium hydroxide aqueous solution at a constant temperature of 20°C and pH=12. The pre-crosslinking solution is added dropwise into the sodium hydroxide aqueous solution, and the catalyst-loaded polyvinyl alcohol swirl ring-derived particles are collected. The polyvinyl alcohol vortex ring-derived particles loaded with catalyst were collected and soaked in a sodium silicate solution with a mass concentration of 5% for 24 hours, washed and stored, and its appearance was as follows: image 3 shown.
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