Radiation Grafting Modification Of PET Fabric And Its Application In Catalysis

Polyethylene terephthalate?PET?fabric is widely used in construction,civil,industrial and military fields because of its excellent performance,which makes it the largest variety of synthetic fiber.However,people are not satisfied with the properties of PET itself,and often develop new functions on the premise of maintaining the properties of the original PET material.This function is mainly realized by radiation grafting.Compared with the traditional surface modification methods,this method has the advantages of simple operation,convenient use and environmental friendliness.At the same time,the demand for polymer materials is increasing in the field of environmental governance.It is one of the main ways to deal with the energy crisis and environmental degradation in the21st century to use polymer materials loaded with nano-metal catalysts to deal with environmental problems.However,how to prepare polymer based catalytic materials is a hot and difficult topic.In this paper,the modification of PET fabric based polymer materials by ⁶⁰Co gamma ray was studied,and PET fabric functional materials with monoatom-like catalysis and photocatalysis were synthesized.It is proved that the nano catalyst is indeed loaded on the surface of PET fabric by means of various material characterization.The organic dye is used as a model to test the degradation ability of modified PET fabric,so as to verify its catalytic performance,and to prove its value in practical industrial use by repeated use.The main conclusions are as follows:1?Glycidyl methacrylate?GMA?was grafted on PET nonwoven fabric via simultaneous radiation induced graft polymerization,then iminodiacetic acid was introduced into GMA graft chain,and then cobalt ion was chelated.The characterization of various materials showed that Co@PET had been successfully synthesized.2?The effects of catalyst dosage,concentration of potassium monopersulfate?Oxone?,reaction temperature and p H on the rate of Co@PET catalyzing Oxone were studied.The activation energy of Co@PET was calculated by the effect of temperature activation.It was proved that the monoatom-like catalysis with high catalytic effect on Oxone was successfully prepared,and the practical application value of Co@PET was shown by pictures.Then through the study of Co@PET at different p H,the amount of Co²⁺precipitation,high concentration of Na Cl on its catalytic efficiency and through the cycle test,the study shows that Co@PET has high stability.Finally,ESR was used to test the types of free radicals,and the main types of free radicals in the degradation of Rh B by Oxone catalyzed by Co@PET were described in detail.In conclusion,the modified PET nonwovens are monoatom-like catalysis with excellent performance and stable performance,and have strong industrial application value.3??-methacryloxypropyltrimethoxysilane?MAPS?was grafted on PET fabric via simultaneous radiation induced graft polymerization,then Ag@Ti O₂ was loaded on the modified PET fabric by solvothermal method.The properties of PET-g-Si/Ag@Ti O₂ were tested by means of characterization.4?According to the test method of photocatalysis,the photocatalysis performance of PET-g-Si/Ag@Ti O₂ was studied.The test results show that the synthesized PET-g-Si/Ag@Ti O₂ has strong photocatalysis performance?stronger than the catalytic activity of Ag@Ti O₂ nanoparticles?,which proves that there is synergism among Si,Ag and Ti O₂,which enhances the photocatalytic performance.Then PET-g-Si/Ag@Ti O₂ was tested for its washing resistance by recycling degradation dyes and aattcc fast washing method.The test results show that the modified PET fabric has strong industrial application value.Finally,the mechanism of PET-g-Si/Ag@Ti O₂ photocatalysis was analyzed by ESR and test results.Therefore,the modified PET non-woven fabric is a kind of photocatalysis with excellent performance and stable performance,which has a strong commercial application value.