Preparation Of Conductive Composite Substrate Electrode Based On 3D Print Manufacturing And Its Application In Copper Eletrorefining

Electrolytic refining of copper is an effective means to achieve high purification of copper.The copper cathode substrate is mostly industrial pure titanium in the electrolytic copper equipment,but the industrial pure titanium is expensive and will be lost in the electrolytic process.Moreover,the copper needs to be stripped from the titanium substrate after electrolysis by special equipment.In this paper,the conductive 3D printing material was prepared by mixing ABS and multi walled carbon nanotubes(MWNTs)by blending twin-screw.Laboratory copper electrolytic cell and substrate had been prepared by 3D printing technology,the substrate conductive nano composite materials take the place of pure titanium on the electrodeposition process of MWNTs/ABS conductive substrate of copper and copper surface.The electrodeposition of copper on MWNTs/ABS conductive substrate and the morphology of copper were studied in the process of electrolytic refining of nano conductive composite substrate instead of pure titanium.Around the preparation of conductive 3D printing consumables,several materials had been prepared,the MWNTs/granular ABS composites,MWNTs/blending ABS composites,and the SBS(styrene)thermoplastic elastomer toughening mixing type MWNTs/ABS composite material.The following conclusions could been drawn through the study of the mechanical properties of materials testing,dynamic mechanical performance testing,Raman spectroscopy test and fracture surface SEM test.1.While conductive composite material prepared by ABS granular,the conductivity,tensile strength,hardness,energy storage modulus,loss modulus,glass transition temperature of the composite were improved with the increase of MWNTs content.The thermal stability of the composites was not affected obviously,but the toughness and melt flow rate decreased;The conductivity of the composite is improved with the increase of blending times.2.The tensile strength and bending strength of mixed ABS decrease with the increasing of content of ABS high glue powder,and the impact strength increased.When the ABS high glue powder: SAN resin is 25:75,the performance of the mixed ABS close to the general level of ABS.The conductivity?tensile strength?hardness?energy storage modulus?loss modulus?glass transition temperature of the mixed ABS/MWNTs composite were improved with the increase of MWNTs content.However,the impact strength and melt flow rate become smaller,and the composite become brittle.The thermal stability of the composites decreases when the content of the composites is more than 5%.3.After the adding of SBS in the composite material,the toughness and thermal stability of composite had been improved,but the electrical conductivity,tensile strength,bending strength,storage modulus and loss modulus decreased with the increasing of SBS content,The dispersion of MWNTs in ABS was worse.4.Under the optimized conditions,the conductive 3D printing material(1.75 mm of diameter)meeted the requirements of FDM type 3D printing had been prepared,and copper electrolytic cell and conductive composite substrate had been printed directly in laboratory.5.Refined copper electrolysis experiment with conductive composite as a substrate experimented in the system of sulphuric acid electrolyte.The results show that the conductivity of the conductive composite substrate is good,and the XRD analysis shows that the composition of the deposit is cubic crystalline copper,and the structure is compact and easy to peel off.The results of cyclic voltammetry show that the grain nucleation and grain growth of Cu2+ are similar to that of pure titanium substrate.The SEM analysis showed that the deposition of copper on the surface of the conductive composite substrate was more smooth after adding a small amount of gelatin and thiourea into the electrolyte...