Preparation Of Functional Nanocomposites By Electrospinning And Their Dyes Removal Properties

The application of dyes in chemical industry is indispensable,but their pollutants result in a great threat to the social environment and human life and health,so how to properly handle the increasing dye pollution,especially dye wastewater,has become an urgent problem to be solved.Based on this,during my Master's degree,I devoted myself to the study of sustainable environment-friendly nanocomposite materials with efficiently remove dye molecules,and at the same time,do not produce secondary pollution.In this paper,two kinds of nanocomposites were prepared by electrospinning,and the removal effect of these nanocomposites on dyes was investigated.Two different nanocomposites were prepared by electrospinning,one was PCL/(n%)PCD membrane,and the other one was PVA/PAA/GO-COOH@AgNPs nanocomposites.The former is to add different content of beta-cyclodextrin-based polymer(PCD)in poly(epsilon-caprolactone)(PCL),changing the electrospinning parameters in order to obtain uniform spinning membrane,and successfully prepared a series of nanocomposites for the adsorption of 4-aminoazobenzene and methylene blue(MB).The experiments results show that PCL/(n%)PCD nanocomposites have excellent selective adsorption,which is due to the large number of cavity structure of PCD.At the same time,PCD also greatly improves the mechanical properties of the spinning membrane,contributing to the stability and reusability of the nanocomposites.The latter is based on PVA/PAA/GO-COOH nanocomposites,and a large number of Ag nanoparticles are modified on the surface of obtained PVA/PAA/GO-COOH@AgNPs nanofiber materials.SEM,TEM,XRD and XPS were used to characterizatied and the successful preparation of the naocomposites was proved.In the catalytic degradation of MB and RhB,the PVA/PAA/GO-COOH@AgNPs exhibited excellent dye removal effect and stability.Both the preparation process of these two nanocomposites is simple and environment-friendly,which has great potential applications in dye wastewater treatment.