Functionalization Of AgNWs With Amino Groups And Their Appilication In An Epoxy Matrix For Antistatic And Thermally Conductive Nanocomposites

In the past ten years, there was the rapid development of polymer nanocomposites, for becoming a new interdisciplinary science. Since the polymer nanocomposites have no conventional polymer materials structure and form, at the same time, compared with ordinary, single polymer material, a polymer nanocomposites, generally it has superior thermal performance, thus showing a more important scientific significance and more broad application prospects. Based on the surface of silver nanowires functionalized silver nanowires and epoxy matrix through chemical bonds, reducing the contact resistance both to enhance the silver nanowires in an epoxy resin matrix dispersion, thereby greatly enhancing the the thermal and electrical conductivity properties of composite materials, thereby preparing high performance antistatic nanocomposite.Firstly, using polyols to prepare one-dimensional line of high aspect ratio silver under optimal reaction conditions. Through the coordination between the thiol group from thioglycolic acid bond and silver nanowirs, thus of silver nanowires were preliminary surface functionalization, made the silver nanowires'surface with carboxyl groups in order to enhance the surface reactivity of silver nanowires. Followed by amide reaction, triethylenetetramine ?TETA? were successfulil modified onthe surface of silver nanowires. The use of high-resolution transmission electron microscopy, infrared-visible extinction spectroscopy, UV-visible spectrometer extinction, EDS, X-ray diffraction, scanning electron microscopy, thermal gravimetric analysis after surface functionalization of silver nanowires topography, crystallization behavior, mechanical properties and thermal stability were studied.The TETA grafted onto the surface of the silver nanowires, thereby introducing highly reactive amino groups, at the same time, TETA is also adopted in this paper the triethylenetetramine curing agent.By reaction of the epoxy groups of the amino group with an epoxy resin matrix, such that silver nanowires and epoxy matrix could connected with each otherwith chemical bonding, thus greatly it enhancing the silver nanowires in a resin matrix dispersion helpful within the composite material to form a more complete conductive network, greatly improving the antistatic properties of the composites. Experimental results show that, compared with the composite material pure silver nanowires after filling, seepage flow through the threshold surface functionalized nanocomposites after dropped to 0.5Vt%, surface resistivity at this time was 1.24×10⁵?. While the fill level is reached 10Vt%, the thermal conductivity of nanocomposites also rose to 0.67 W/m·k. The addition of AgNWs@NH₂ in epoxy matrix could obviously improved the mechanical properties of the nanocomposite materials, the tensile modulus increased to 1122MP when the volum loading was 1.5%.