Cellulose nanocrystalline-modified ceramic blank and preparation method thereof
A ceramic green body and cellulose technology, which is applied in the field of high-performance ceramic green body and its preparation, can solve the problems such as the performance gap of ceramic green body, and achieve the effects of simplifying the industrial production process, enhancing water retention, and improving mechanical properties
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Embodiment 1
[0034] ① Accurately weigh 3.75 g of cellulose nanocrystal suspension with a mass fraction of 1.5%, add 3.75 g of N,N-dimethylacrylamide, 0.075 g of N,N-methylene bisacrylamide, and poly Ammonium acrylate 0.3g, after stirring for 10 minutes, adjust the pH value to 9.3 with ammonia water to prepare the premix;
[0035] ②Alumina powder (spherical α-Al 2 o 3 , white powder, d 50 ≈5 μm, α-Al 2 o 3 Content > 99.8%. ) mixed with the premixed solution at a solid-to-liquid volume ratio of 1:1; adding grinding balls at a ball-to-material mass ratio of 1.5:1, ball milling for 30 minutes, and a rotating speed of 500 rpm to prepare a slurry;
[0036] ③ Add 0.0375g of initiator ammonium persulfate to the slurry, stir for 15 minutes and then vacuum defoam, then pour into the mold and heat and solidify at 70°C;
[0037] ④ The cured wet body is demolded, machined, dried at 40°C for 12 hours, and vacuum-dried at 90°C for 24 hours to obtain a high-strength ceramic green body.
Embodiment 2
[0042] ① Accurately weigh 15g of cellulose nanocrystal suspension with a mass fraction of 1.5%, add 25g of distilled water, and stir for 10 minutes; add 7.5g of N,N-dimethylacrylamide, N,N-methylenebis 0.15 g of acrylamide, 0.6 g of ammonium polyacrylate, and after stirring for 10 minutes, adjust the pH value to 9 with ammonia water to prepare a premix;
[0043] ②Alumina powder (spherical α-Al 2 o 3 , white powder, d50≈5μm, α-Al 2 o 3 Content > 99.8%. ) mixed with the premixed solution at a solid-to-liquid volume ratio of 1:1; adding grinding balls at a ball-to-material mass ratio of 1.5:1, ball milling for 30 minutes, and a rotating speed of 400 rpm to prepare a slurry;
[0044] ③Add the initiator ammonium persulfate to the slurry, the solid mass of which is 0.075g, stir for 15 minutes, vacuum defoam, then pour into the mold, heat and solidify at 70°C.
[0045] ④ The cured wet body is demolded, machined, dried at 40°C for 12 hours, and vacuum-dried at 90°C for 24 hours to ...
Embodiment 3
[0050] ① Accurately weigh 30g of cellulose nanocrystal suspension with a mass fraction of 1.5%, add 10g of distilled water, and stir for 10 minutes; add 7.5g of N,N-dimethylacrylamide, N,N-methylenebispropylene Amide 0.15g, ammonium polyacrylate 0.6g, after stirring for 10 minutes, adjust the pH value to 9.2 with ammonia water to prepare a premix;
[0051] ②Alumina powder (spherical α-Al 2 o 3 , white powder, d50≈5μm, α-Al 2 o 3 Content > 99.8%. ) mixed with the premixed solution at a solid-to-liquid volume ratio of 1:1; adding grinding balls at a ball-to-material mass ratio of 1.5:1, ball milling for 30 minutes, and a rotating speed of 400 rpm to prepare a slurry;
[0052] ③Add the initiator ammonium persulfate to the slurry, the solid mass of which is 0.075g, stir for 15 minutes, vacuum defoam, then pour into the mold, heat and solidify at 70°C.
[0053] ④ The cured wet body is demolded, machined, dried at 40°C for 12 hours, and vacuum-dried at 90°C for 24 hours to obta...
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