Eco-friendly process for facile pore control in thermally stable cellulose acetate utilizing zinc(II) nitrate for water-treatment

摘要

The generation of pores in cellulose acetate (CA) using water pressure and inorganic materials was investigated and succeeded in fabricating straight nanopores in polymer. In this study, we researched Zn(NO3)(2)center dot 6H(2)O to have relatively larger ionic size instead of Ni(NO3)(2)center dot 6H(2)O. When the CA/Ni(NO3)(2)center dot 6H(2)O membrane was employed, the water flux was about 95 L/m(2)h at water-pressure of 8 bar. However, the water flux through the CA/Zn(NO3)(2)center dot 6H(2)O membrane was about 182 L/m(2)h at the same water-pressure. This indicated that Zn(NO3)(2)center dot 6H(2)O was more easily able to control the pore size than Ni(NO3)(2)center dot 6H(2)O since both zinc salts and the plasticized parts by salts were readily removed by water-pressure. (C) 2019 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.