Treatment of Ramie Fabric with Supercritical Carbon Dioxide and Its Application to Electroless Metal-Plating

By treating ramie fabric in supercritical carbon dioxide, about 60% of lignin contained in the fiber could be removed. When the ramie fabrics were treated in supercritical carbon dioxide containing an organo-metal complex, their cupper plating has been successfully done by immersing them in electroless copper plating solution much easier. Using KEC-Method, it has proved that the electromagnetic shielding effectiveness of the Cu-plated ramie fabric was 93∼67 dB in the range of frequency 10∼1000MHz, and the surface resistivity reached 0.07∼0.1Ω⁄□. The effect of ethanol as a modifier in carbon dioxide fluid was also discussed.