The Structure and Adsorption Properties of Polypropylene Film Drawn in n-Propanol

n-Propanol중에서 연신한 Polypropylene 필름의 구조와 흡착성

Polypropylene(PP) films were drawn in air and n-propanol. The morphological change of drawn PP films was observed with optical microscope and adsorption properties of these films by organic dyes were investigated in terms of morphological structure. The PP films drawn in n-propanol were adsorbed with organic dyes from aqueous solutions, whereas those drawn in air were not. It was found that specific microcracks were formed on the PP films after drawing in n-propanol. Therefore, it may be regarded that films were capable of adsorbing dyes from aqueous solutions. Major changes in adsorption properties of PP films were obtained by varying the hydrophobicity of acid dyes(methyl orange, ethyl orange, and propyl orange). The more hydrophobic, the more adsorbed. So it was proposed that microcracks were effective adsorption sites and the main interaction was dispersive and hydrophobic interaction force.