| abstract |
A kind of preparation method of the cellulose aerogels ball of controlled diameter obtains cellulose solution comprising steps of 1) cellulose powder is dissolved in NaOH/ urea system；2) a certain proportion of chloroform, acid-mixed conjunction or ethyl acetate, acid-mixed are closed, obtains acid coagulation bath foam, stirring is uniformly mixed coagulating bath；3) cellulose solution is transferred in dispensing syringe, falls into cellulose solution in the coagulation bath of stirring by special nozzle at various pressures, obtain the cellulose gel glueballs of different-diameter；4) cellulose gel glueballs suction filtration, solvent are replaced and is dried, obtain cellulose aerogels ball.For the cellulose aerogels ball for using preparation method of the present invention to be prepared near perfect spherical shape, controlled diameter is uniform in size, can expand the application range of cellulose aerogels significantly, and the preparation efficiency of cellulose gel glueballs is high, experimental facilities is cheap.Cellulose aerogels spherolite diameter is adjustable within the scope of 5 μm~2mm, and crosslinking hole is mesoporous and micropore. |