Preparation and Property Study of Hydroxylation Modified Cotton Fiber Base Absorbent.

Preparation process and property of hydroxylation modified cotton fiber base absorbent were discussed. Cotton Fibers were used as the base material. Epoxidation and dialdehyde oxidation were performed for the cotton fibers with epoxy chloropropane and sodium periodate. Then, epoxy chloropropane was used as cross-linking agent to graft β-cyclodextrin and aldolization was adopted to graft hydroxy end hyperbranched polymer. Through the adsorption experiment on heavy metal ion, the optimized preparation process was obtained as 40 °C for oxidizing temperature, 0.6% for sodium periodate mass fraction and 3.5 h for dialdehyde oxidation. When 0.4 mol/L HCl was used as desorption reagent and 5% NaOH mass fraction was used as regenerant, the desorption and regeneration efficiency were better. It is considered that the absorption capability of the modified cotton fiber base absorbent on heavy metal ion is higher than cotton fiber. Through desorption of HCl and regeneration of NaOH regenerant, the absorption effect is still quite high. [ABSTRACT FROM AUTHOR]