US 11,987,530 B1
Phase inversion pore-forming agent and pore-forming method for fly ash-based ceramic flat membrane support
Zhiguo He, Changsha (CN); Hui Zhong, Changsha (CN); and Weiqi Xie, Changsha (CN)
Assigned to Central South University, Changsha (CN)
Filed by Central South University, Changsha (CN)
Filed on Dec. 28, 2023, as Appl. No. 18/398,832.
Claims priority of application No. 202211737587.5 (CN), filed on Dec. 30, 2022.
Int. Cl. C04B 35/622 (2006.01); B28B 11/24 (2006.01); C04B 35/18 (2006.01); C04B 35/626 (2006.01); C04B 35/64 (2006.01); C04B 38/04 (2006.01)
CPC C04B 35/18 (2013.01) [B28B 11/247 (2013.01); C04B 35/62204 (2013.01); C04B 35/6264 (2013.01); C04B 35/6269 (2013.01); C04B 35/64 (2013.01); C04B 38/04 (2013.01); C04B 2235/3463 (2013.01); C04B 2235/6021 (2013.01); C04B 2235/606 (2013.01)] 4 Claims
OG exemplary drawing
 
1. A pore-forming method for a fly ash-based ceramic flat membrane support, comprising: mixing fly ash with a phase inversion pore-forming agent and an oil additive, and then conducting aging and extrusion molding to obtain a green body; and subjecting the green body to static curing in a constant-temperature and constant-humidity environment, placing in water to allow phase inversion, and then conducting drying and sintering; wherein
the phase inversion pore-forming agent comprises poly(oxyphenylene sulfone) and N-methylpyrrolidone (NMP) at a mass ratio of 1:(3.5-5);
the oil additive comprises glycerol, oleic acid, and tung oil at a mass ratio of (1.2-2):1:(1.5-2.5); and
the phase inversion pore-forming agent and the fly ash are at a mass ratio of (1-2):4.