查看更多>>摘要：Lignin is a typical biological macromolecule with a three-dimensional network structure and abundant functional groups.It has excellent ionic complexation ability and amphiphilic molecular structure characteristics.In this study,the carbon steel anticorrosion performance of sodium lignosulfonate(SLS)in an acid solution was evaluated using the weight loss method,electrochemical measurements,scanning vibration electrode technique(SVET),and surface characterization methods.SLS exhibited excellent corrosion inhibition efficiency for Q235 carbon steel in 1 mol·L-1 HCl,reaching a maximum value of 98％.A low SLS concentration of 20 mg·L-1 resulted in the maximum corrosion inhibition efficiency,which remained nearly constant at higher SLS concentrations.The SVET test demonstrated that the formation of an SLS adsorption film can impede corrosion.This study confirms the significance of the application of green biomass resources in the field of metal corrosion protection and green functional materials.
查看更多>>摘要：The configuration and quality of reinforce-ments,as well as the robustness of interfacial bonding,holding a critical significance in determining the concur-rence between electrical conductivity and mechanical strength in metal matrix composites.In this study,citric acid was employed as the precursor for synthesizing multi-scale carbon nanomaterials(graphene quantum dots and graphene,abbreviated as GQDs and GN).The GQDs@GN/Cu composites were fabricated through a segmented ball milling process in conjunction with subsequent spark plasma sintering(SPS).The intragranular GQDs and intergranular GQDs@GN had synergistically reinforced Cu composites through Orowan strengthening,load transfer strengthening and refinement strengthening.Furthermore,the robust interface bonding between GQDs@GN and Cu effectively mitigated interfacial impedance stemming from electron-boundary scattering.The yield strength and ulti-mate tensile strength of the GQDs@GN/Cu composites were recorded as 270 and 314 MPa,respectively,repre-senting an improvement of 92 and 28％over pure Cu,while maintaining electrical conductivity at a level comparable to that of pure Cu.This study advances the understanding of the possibility of realizing a synergistic compatibility between electrical conductivity and mechanical strength in Cu composites.
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