Study On The Preparation And Performance Of Functional Fabrics Based On Zeolite-like Imidazole Organic Frameworks(ZIFs)

The rapid development of industry and energy shortage are issue that society needs to pay attention to.As a major printing and dyeing country,wastewater treatment has become a major problem.ZIF-8 has a large specific surface area,high porosity and good chemical stability.It is often used for photocatalytic degradation of dyes.However,the difficulty of recycling and reuse of ZIF-8 powder limits its development.The fabric has a large specific surface area,strong adsorption capacity,and cost.Low and easy to shape and other advantages,suitable for loading catalysts.In this article,the ZIF-8series of functional fabrics are prepared by in-situ bionics method,and the properties of functional fabrics such as photocatalytic degradation of methylene blue（MB）,antibacterial,heavy metal adsorption,and UV resistance are explored.The main contents and results of the research are as follows:1.Using cotton fabric as a substrate to grow ZIF-8 nanoparticles in situ.First,the cotton fabric is modified with dopamine,Zn²⁺crystal nucleus is introduced during the formation of polydopamine,and then activated by 2-methylimidazole（2-MI）.The surface of the cotton fabric is in-situ in the Zn²⁺and 2-MI reaction solution.Grow ZIF-8 nanoparticles to prepare ZIF-8 functional cotton fabric.Finally,explore the photocatalytic degradation of MB,antibacterial,anti-ultraviolet and other properties of functional cotton fabrics.The results show that:under full light,the degradation efficiency of ZIF-8 functional cotton fabric for MB can reach 92.6%at 190 min,and the degradation efficiency can still reach 90.7%after three cycles,indicating that ZIF-8 functional cotton fabric has a good performance.The photocatalytic degradation performance,and has good cycle stability and chemical stability.The antibacterial test showed that the ZIF-8 functional cotton fabric has an obvious antibacterial zone against E.coli,which is more than 7 mm,showing good antibacterial properties.Through the anti-ultraviolet test,the UPF value of ZIF-8 functional cotton fabric is far greater than50,and T（UVA）=0.05%,indicating that ZIF-8 functional cotton fabric has good anti-ultraviolet performance.2.Using non-woven fabric as the substrate,first modify dopamine,then introduce Zn²⁺,then after 2-MI activation,grow ZIF-8 nanoparticles on the surface of non-woven fabric in situ,and finally reduce Ag⁺with dopamine to prepare Ag/ZIF-8 Functional fabric.The performances of Ag/ZIF-8 functional fabrics for photocatalytic degradation of MB,antibacterial,anti-ultraviolet,and heavy metal adsorption were investigated.The results showed that under visible light,Ag/ZIF-8 functional fabrics degraded MB,and the degradation efficiency reached 93.4 at 170 min.%,after three cycles,the degradation efficiency still reaches 90.2%,with good cycle stability.The antibacterial test showed that the antibacterial rate of Ag/ZIF-8 functional fabric to Escherichia coli and Staphylococcus aureus bacteria reached more than 90%,indicating good antibacterial performance.The anti-ultraviolet test results show that the UPF value is far greater than 50,and T（UVA）=0.05%,indicating good anti-ultraviolet performance.The Ag/ZIF-8 functional fabric was used to adsorb Pb²⁺,and the Pb²⁺removal rate reached 99.5%within 7 minutes,indicating that this functional fabric has good adsorption performance.Compared with ZIF-8 functional cotton fabric,Ag doping speeds up the flow of photogenerated carriers,inhibits the recombination of electron-hole pairs,improves the photocatalytic degradation efficiency,and has good cycle stability,which is an expansion of textile materials.It is of reference significance.