Stude Of Electroless Metal Plating Of Polymer Fibre And Powder

Modern electronic instrument,apparatus,communicational equipment and handle official business equipment are developing in subminiature and light-duty direction.The electric linked parts which were used by welding method are replaced by conductive adhensive.The compound electrical conductive adhensive was usually made by filling electric conductive particles in the polymer,the electrical conductive particles are aurum,silver, copper, nickel metallic particles etc. It is high cost because silver is noble metal, and a volume resistivity of 10^-3Ω·cm was obtained until 60 wt% silver powder filled into polymer matrix. So the electrical conductive adhensive is costliness at the present market. On the other hand, the silver particles were easy sinking down in the polymer matrix because it's density are more bigger than the polymer matrix which made the transportation and preservation of the conductive adhensive being very discommodiousness. In this work, we prepared two kinds of low density and high electrical conductive metal/polymer materials by electroless plating technique: Cu-coated polyester powder and Ag-coated PAN electrospun fiber, the optimal plating solution and influence factors were studied. The size, surface morphology and electrical conductive property are also studied in this paper.1. A Cu-coated polyester micro-powder with low density and good electrical conductive was prepared by electroless plating technique, but it can be easy oxidation in the atmosphere so we have to improve its oxidation resistivity through surface disposal. The size and surface morphology of the powder were studied by laser particle size analyzer, XRD and microscopy with a hot stage. The results show that the size of the Cu-coated polyester powder is between 0.1-2.8μm. The Cu-coated polymester powder possess a good heat resistances between 25-300℃. A electrical conductive adhesive was obtained by blending epoxy resin and Cu-coated polyester powder. The electrical conductive property of the adhesive was improved by using surface treated on Cu-coated polyester powder. The volume resistivity of 1.6×10^-3Ω·cm was obtained by blending 50wt% Cu-coated polyester and epoxy resin. The change of volume resistivity is under 20% in the range of 20℃-120℃, and the ability of conductivity was not reduced after conserved three months.2. An Ag-coated PAN electrospun fiber with low density and good electrical conductive was prepared by electroless plating technique. The surface morphology of the fiber was studied by SEM and microscopy with a hot stage. The results show that the fiber has suitable length- diameter ratio. The Ag-coated PAN electrospun fiber possess a good heat resistances between 25-300℃. The electrical conductive adhesive was prepared by blending the Ag-coated PAN electrospun fiber and polymer matrix. The volume resistivity of 2.0×10^-3Ω·cm was obtained by blending 30wt% Ag-coated PAN electrospun fiber and epoxy resin. The change of volume resistivity is under 20% in the range of 20oC-150oC. The shear strength of the conductive adhensive changed with the change of different polymer.