Preparation And Cupric Ions Release Performances Of Copper/Low Density Polyethylene Porous Composite

Cu/LDPE porous material is prepared by the injection molding/particulate leachingmethod, its structure and cupric iron release performance are characterized in this paper.During the manufacturing process of Cu/LDPE porous composites,DTBHQ/Cu/LDPE composite is prepared by injection molding with DTBHQ as porogen.And then the DTBHQ/Cu/LDPE composites are extracted with ethyl acetate as extractionsolvent. The influence of extraction time, heating temperature, injection temperature, massfraction of DTBHQ, mass fraction of Cu and other factors on the extraction behavior ofDTBHQ is discussed. The results show that the extraction behaviors of DTBHQ presentcertain laws with the change of heating temperature, mass fraction of DTBHQ, injectiontemperature. For DTBHQ/Cu/LDPE composite injected at220℃, the extraction rate ofDTBHQ can arrive at100%after extraction for14h, with heating temperature of90℃.The Cu/LDPE porous composite was characterized by X-ray diffraction, scanningelectron microscopy, Fourier transform infrared spectroscopy, gas chromatography/massspectrometry and gravimetric analysis. For comparison, a non-porous Cu/LDPE compositewas also characterized in the same way. The results show that the porous structure wassuccessfully introduced into the polymeric base of the non-porous Cu/LDPE composite;the Cu/LDPE porous composite is a simple hybrid of copper particles and porous LDPE;and porosity of the Cu/LDPE porous composite increases with the increase of massfraction of DTBHQ.Porosity, microstructure and mass fraction of Cu have important effect on cupric ionrelease performance. The test result indicates that cupric ion release increases with theincrease of porosity, pore-size, mass fraction of Cu.