Phase inversion pore-forming agent and pore-forming method for fly ash-based ceramic flat membrane support
AssigneeCentral South University
InventorsZhiguo He, Hui Zhong, Weiqi Xie
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Abstract
The present disclosure provides a phase inversion pore-forming agent and a pore-forming method for a fly ash-based ceramic flat membrane support. The phase inversion pore-forming agent includes poly(oxyphenylene sulfone) and N-methylpyrrolidone (NMP), and is used in a preparation process of the fly ash-based ceramic flat membrane support. Pores can be formed through phase inversion, forming straight-through pores with gradient distribution inside the ceramic flat membrane support, thus avoiding a low porosity, a poor water flux, and uneven pore formation of the existing fly ash-based ceramic flat membrane support.
Claims4
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.
Dependencies are inferred from the claim text.