| Abstract:Nanosilver particles were supported by dialdehyde cellulose which was prepared by using bleached kraft softwood pulp (BKSP) as raw material, and being oxidized by sodium periodate. Then silver nanoparticles/dialdehyde cellulose aerogels loaded with 24.78 % nanosilver were obtained by high pressure homogenization method. The impacts of sodium periodate oxidation pretreatment reaction time on the cellulose and fiber of BKSP were investigated and the examples were characterized by using FT-IR, XRD, UV-vis, SEM, TEM and BET. The results showed that with the increase of oxidation time, the aldehyde group content of cellulose increased to 3300 µmol/g, the degree of polymerization of the pulp decreased significantly from 1447 to 525. At the same time, the zero span tensile strength and fiber length also showed a downward trend. Nanometer silver particles in cellulose aerogels were spherical structures. The specific surface area of aerogels was 35.40 m2/g and the average pore diameter was 19.62 nm. |
