Spectral sensitivity of chitosan photodegradation

✍ Scribed by Anthony L. Andrady; Ayako Torikai; Takahiro Kobatake

• Publisher: John Wiley and Sons
• Year: 1996
• Tongue: English
• Weight: 473 KB
• Volume: 62
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/(sici)1097-4628(19961128)62:9<1465::aid-app16>3.0.co;2-y

✦ Synopsis

The wavelength sensitivity of photodegradation of solvent-cast chitosan films exposed to monochromatic UV-visible radiation is reported. Measurements were made of changes in absorption spectra, both in the UV-visible region and in the infrared region, as well as changes in dilute solution viscosity of samples, on irradiation at selected wavelengths. Action spectra are reported for these processes. A mechanism of photodegradation based on changes in Fourier transform infrared (FTIR) spectra of irradiated chitosan is presented.