Abstract
In industrial production, the use of enzyme-catalyzed reactions to prepare biochemical products often faces many difficulties. Traditional immobilization technology showed the non-ideal immobilization effect, the activity of the enzyme may be greatly affected, and the final production efficiency is still not ideal. For these dilemmas, this research takes aldo-keto reductase as the object, and tries to use the fast-developing 3D printing technology to optimize the immobilization rate of enzyme, increase the activity of the immobilized enzyme, and open up its potential for industrial applications. In order to ensure that the enzyme activity after immobilization is not affected, single factor experiments and orthogonal experiments were set up, and the optimal conditions for 3D printing were determined through response surface analysis. In addition, the repeated use performance of the printed aldo-keto reductase was also studied, and the results showed that it still retains about 50% of the enzyme activity after six times, reflecting the huge industrial application potential. Finally, the immobilized enzyme was further characterized by SEM to explore the loading of aldo-keto reductase on the printing material. The results are of great significance for the immobilization of catalysts, the production of chiral alcohols, and the application of 3D printing.
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