Highly permeable nanoscale silicon carbide ceramic flat sheet membrane and method of making same

By utilizing the interaction between bacterial cellulose and polyaspartic acid in the prepared dispersible sol, the problem of silicon carbide particle dispersion was solved, forming a network of interconnected pores, which improved the porosity and flux performance of the silicon carbide ceramic flat sheet membrane.

CN121972027BActive Publication Date: 2026-07-07ZHEJIANG JIANMO TECH CO LTD
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Patent Information

Application Number
CN202610451203.5
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2026-04-08
Publication Date
2026-07-07
Estimated Expiration
2046-04-08

AI Technical Summary

Technical Problem

The silicon carbide particles exhibit dispersion issues during preparation, leading to uneven pore size distribution and reduced connectivity in the membrane, which in turn affects the membrane's high-throughput performance and separation stability.

Method used

A dispersion sol was prepared by reacting bacterial cellulose with epoxy silane and polyaspartic acid, followed by mixing with polyacrylonitrile dispersion and zinc ion aqueous solution. The uniform dispersion of silicon carbide particles was achieved through hydrogen bonding and dipole-dipole interactions, and a network of interconnected channels was formed during sintering.

Benefits of technology

It improves the porosity and flux of silicon carbide ceramic flat sheet membranes, reduces the risk of clogging, and enhances the membrane's antifouling resistance and service life.

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Abstract

The application belongs to the technical field of ceramic membrane and specifically provides a high-permeability nanoscale silicon carbide ceramic flat membrane and a preparation method thereof. The preparation method of the high-permeability nanoscale silicon carbide ceramic flat membrane comprises the following steps: 1) mixing silicon carbide and an additive, then adding a dispersion sol and deionized water to obtain a mud; 2) after the mud is aged, extrusion-second aging-extrusion molding is performed to obtain an original main body; and 3) the original main body is sintered, immersed in a coating solution to obtain the high-permeability nanoscale silicon carbide ceramic flat membrane; the dispersion sol comprises bacterial cellulose-epoxy silane-polyaspartic acid polymer and polyacrylonitrile dispersion liquid. The high-permeability nanoscale silicon carbide ceramic flat membrane prepared by the application has higher porosity and pure water flux.
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