Ion exchanger from chemically modified banana leaves.

Cation exchangers from chemically modified banana leaves have been prepared. Banana leaves were treated with different molarities of KMnO4 and cross linked with epichlorohydrin and their effect on metal ion adsorption was investigated. Phosphorylation of chemically modified banana leaves was also studied. The metal ion uptake by these modified banana leaves was clarified. Effect of different varieties, e.g. activation of produced cation exchanger, concentration of metal ions was also investigated. Characterization of the prepared ion exchangers by using infrared and thermal analysis was also taken in consideration.

Electrical insulated paper from cotton linter.

Insulated paper had been prepared from cotton linter containing certain additives. Strength properties had been studied for all paper prepared from cotton linter, before and after impregnating in the linseed oil. Also, the dielectric constant (έ) and AC electrical conductivity with frequencies over the range (100 kHz to 3 MHz) and at different temperatures were studied. Blended cotton linter with glass fiber or polyester fiber increased the dielectric constant. Since the glass fibers lowered the power factor from 0.63 to 0.28% and enhanced dielectric constant. The addition of hydrophilic fibers such as rayon or polyester fiber can be made paper of low porosity, low density and high dielectric resistance. Also, the addition of lead sulphate improved dielectric constant of paper since it has dielectric coefficient >20. The dielectric constant in sample which dipped in oil is higher than the sample without oil.