A fungicide-resistant hollow fiber membrane and its preparation method, characterized by synergistic effects of targeted adsorption and physical cell disruption using nanocrystals.

Abstract

This invention relates to the field of water treatment technology, specifically to a fungicide-resistant hollow fiber filtration membrane and its preparation method that combines targeted adsorption with physical cell disruption via nanocrystals. The method includes the following steps: S1, dissolving chitosan in an acidic solution to partially degrade the chitosan molecular chains, stirring until a homogeneous chitosan solution is formed; S2, immersing a hollow fiber membrane in the chitosan solution from S1, adding an alkaline solution to adjust the system to alkaline conditions, causing the chitosan molecular chains to align and form chitosan nanocrystals on the surface of the hollow fiber membrane; S3, placing the solution system from S2 in a crystallization container and controlling the temperature for crystallization; S4, separating the crystallized hollow fiber membrane from the solution to obtain a fungicide-resistant hollow fiber filtration membrane loaded with chitosan nanocrystals. This invention improves the long-term reliability of the membrane material under complex water quality conditions by combining the targeted adsorption function of chitosan with the physical cell disruption function of nanocrystals.

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