Preparation And Properties Of Wear-resistant Graphene/Glass Fiber

Glass fiber has advantages such as high mechanical properties,low cost,corrosion resistance and high temperature resistance.It is widely used as a reinforcing material worldwide.But there are some shortages.For example,the electrical insulation of the glass fiber and polymer matrix makes components such as electronic instrument housings made of glass fiber reinforced composites extremely susceptible to external electromagnetic signals,which not only affects the normal operation of the device but may also cause data Information leakage or even instrument failure.Therefore,the preparation of conductive glass fibers can undoubtedly solve these problems.In recent years,methods such as electroless plating are mainly used to prepare conductive glass fibers by plating conductive materials on the surface.But this method is not only complicated in process,but also easy to peel off the surface coating,so it is of great significance to develop a wear-resistant conductive fiber.Since graphene was discovered in 2004,it has been widely concerned because of its special structure and excellent performance.It has a huge and specific surface area(theoretical value of 2630 m²g^-1),high breaking strength?125 GPa?,excellent charge carrier mobility,and is very suitable as a conductive filler to prepare conductive glass fibers.However,the two-dimensional structure of graphene is prone to curling and agglomeration,which makes it difficult to disperse uniformly in the matrix.In this paper,3-aminopropyltriethoxysilane was used to surface-modify the soda lime silica glass particles obtained by ball milling of soda lime silicon slides so that the surface carries positively charged amino groups in aqueous solution and negatively charged graphite oxide The ene nanosheets are combined by electrostatic self-assembly to produce graphene oxide/soda lime silica glass composite particles,and then generate reduced graphene oxide/soda lime silica glass bulk composite materials in situ in a hot press furnace,and finally draw down at high temperature to make composite glass fibers.The results confirm that the reduced graphene oxide sheet is well distributed in the fiber,greatly improving the mechanical properties of the prepared reduced graphene oxide/sodium calcium silicon fiber,and the tensile strength of the reduced graphene oxide/sodium calcium silicon fiber is pure sodium calcium Three times the silicon fiber.As the concentration of reduced graphene oxide increases,the conductive network of reduced graphene oxide continues to grow.Provides a conduction path across the reduced graphene oxide/sodium calcium silicon optical fiber,which shows a high sensitivity to temperature.Compared with the current fragile reduced graphene oxide coated glass fiber,the conductivity of the newly produced reduced graphene oxide/sodium calcium silicon conductive fiber can withstand strong wear and tear,showing the potential for practical application.More importantly,these expected conductive glass fibers can be used as built-in sensors to monitor stress and strain and cracks in large buildings in real time,making the building smarter and safer.