Innovative Method for Demineralization of Cellulosic Substrates via Morpholinium Hydrogen Sulfate

Currently, replacement of hazardous chemical treatments with environmentally-friendly alternatives coupled with assimilation of different processes in one step in order to save water and energy and prevent the production of waste is one of the priorities of industries that seek sustainable development and cleaner production. conventional demineralization of cotton fabric is mostly carried out using mineral acids which are corrosive, toxic, and above all, could cause fabric damage. in addition, demineralization as a separate step requires a high rate of water and energy consumption. this study examines the possibility of simultaneous desizing and demineralization using an acidic and nonvolatile ionic liquid. evaluation of different experimental conditions revealed that under proper condition via morpholinium hydrogen sulfate, simultaneous demineralization and starch desizing of the cellulosic substrate could be carried out with a significant decrease in the concentration of cationic metal ions like fe²+, cu²+, mg ²+, ca²+, and zn²+ while the quality of desizing is at the same range as conventional enzymatic hydrolysis (tegewa: 8-9). this new method did not show any negative effects on the substrate tensile properties.