Preparation And Application Of Multicomponent Modified Graphene Oxide

Graphene is widely used in many fields,such as biomedicine,energy storage materials,aerospace,composite materials and new energy because of its excellent electrical,mechanical,optical and thermal properties.Graphene oxide is the oxidation product of graphene,it’s stronger reactivity than graphene,and water-soluble,more convenient to apply.In this paper,the electrical conductivity of reduced graphene oxide and the anti-ultraviolet and anti-bacterial properties of graphene oxide were used to study,aiming at the problems of easy electrostatic in dry condition,poor anti-ultraviolet,easy growth of bacteria and poor hydrophobic properties of cotton fabric.It is divided into three studies:the antistatic finishing of cotton fabric with graphene oxide reduced by sodium citrate,cotton fabric modified by silane coupling agent and graphene oxide,cotton fabric modified by silane coupling agent KH570 and CTS-GO(chitosan modified graphene oxide).Antistatic finishing of cotton fabric with graphene oxide reduced by sodium citrate:graphene oxide was prepared by modified Hummers method,graphene oxide was treated on cotton fabric and then reduced by sodium citrate and test its antistatic property and washing resistance.The effects of graphene oxide dosage,sodium citrate dosage,reduction temperature and reduction time on antistatic effect were discussed.The optimum technological conditions of graphene oxide reduction with sodium citrate for cotton fabric(20cm×20cm)were determined as graphene oxide 0.4g,sodium citrate 15g/L,and reduction at 100℃for 3.5h.The charged density of the finished fabric is 0.028μC/m~2,which shows excellent antistatic effect.After 40 washes,the charged density is 0.195μC/m~2,and the fabric still has good antistatic property.Silane coupling agent and graphene oxide modified cotton fabrics:firstly,graphene oxide was treated on cotton fabrics by repeated dipping-drying method,then the finished fabrics were modified with silane coupling agent KH570 to make the fabrics have anti-ultraviolet and hydrophobic properties.The effects of graphene oxide dosage,silane coupling agent KH570 dosage and curing temperature on the anti-ultraviolet and hydrophobic properties of fabrics were discussed.The optimum process of cotton fabric modified by graphene oxide and silane coupling agent KH570 was determined.The chemical structure and surface physical structure were analyzed by infrared spectroscopy,scanning electron microscopy and X-ray diffraction.The results showed that the optimum process of cotton fabric(20cm×20cm)modified by graphene oxide and silane coupling agent KH570 was as follows:graphene oxide 0.2g(loading 3.5%),silane coupling agent KH570 1g(loading 16.7%),baking temperature 125℃,UVA transmittance of modified fabric was 0.51%,UVB transmittance was 0.42%,UPF 50+.The contact angle reached138.1°.The fabric showed excellent UV resistance and hydrophobicity.The cotton fabric was modified by silane coupling agent KH570 and CTS-GO.CTS-GO was prepared from chitosan and graphene oxide.Cotton fabric was treated with CTS-GO by repeated dipping-drying,then KH-CTS-GO modified cotton fabrics were obtained by treated with silane coupling agent.The chemical structure and surface physical structure of KH-CTS-GO modified cotton fabric were characterized by infrared spectroscopy,X-ray diffraction and scanning electron microscopy.The results showed that the KH-CTS-GO modified cotton fabric of escherichia coli and staphylococcus aureus antibacterial rate were 99.9%,the static contact Angle reached 143.1°,showed excellent antibacterial and ultraviolet resistant properties.The water-resistant property was also tested.