Lipoic acid@Cu-MOF material with dual response to pH and humidity and its preparation method and application

Abstract

The present invention discloses a thioctic acid @Cu-MOF material with dual response to pH and humidity, and its preparation method and application. The preparation method comprises: fully mixing and reacting a copper source solution with an organic ligand solution, followed by washing, a first drying treatment, and then soaking in dichloromethane and vacuum drying treatment to obtain Cu-MOF crystals; dispersing the Cu-MOF crystals in ethanol, then ultrasonically mixing with a thioctic acid solution, then adding water under stirring and continuing to react, and then washing and vacuum drying treatment to obtain a thioctic acid @Cu-MOF material with dual response to pH and humidity. The preparation method provided by the present invention has low energy consumption, simple operation, and low cost; at the same time, the thioctic acid @Cu-MOF material has a high loading capacity and tight coordination, and can control the release of thioctic acid by responding to changes in pH and humidity in the environment, so that it has good application prospects in the field of fruit and vegetable preservation.

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