Glutaraldehyde cross-linked chitosan acetate

Deposition of chitosan on SiOz (0.06-0.02 mm) and ZrOz was performed by multiple steeping of a portion of carrier in a solution of chitosan in 1% acetic acid and filtered. Wet or semi-dry chitosan-coated carrier was added directly to methanol or propanol-2 and stirred for 0.5-2h after addition of the calculated amount of glutaraldehyde. Calculated cross-linking extent was 10-15%. Chemical modification of chitosan was performed by carrier treatment with pyridinealdehyde-2 boiling solution in benzene. 

Fig. 5. Mechanical spectra of chitosan (1% wM in 0.1 mol acetic acid) chemically cross-linked with glutaraldehyde with stoichiometric ratios, R, over the range 0.32 - 5 at 3J°C. G filled circles G open circles t , triangles.

---