Abstract: In this study,carboxylic wood powder,a cationic exchanging resin,was prepared from hydrolysis of the grafted copolymer(PANW),which was prepared by reacting acrylonitrile with wood powder.Experiments on graft copolymerization and acid/alkaline hydrolysis of PANW were carried out to study the effects of dosage,temperature and time on the yield and properties of the products. Results show that acid value of carboxylic wood powder from alkaline hydrolysis is higher,but its yield is lower than that from acid hydrolysis. The adsorption capacity of carboxylic wood powder for basic pink dye increased with increase of the initial concentration of the adsorbate,and could be kept over 500mg/g after repeated use and regeneration for 4 times.

Key words: acrylonitrile, wood powder, graft copolymerization, ion exchange