Abstract:

When dry bamboo particles were irradiated with UV, free radicals produced and the phenomenon of delayed luminescence occurred. Electron spin resonance(ESR)spectrometer and BPCL biological low-light detector were used to measure the free radical spectra and the delayed luminescence spectra of the bamboo particles irradiated with UV. The findings were as follows: the spectrum split factor(g)of bamboo free radicals was 2.003 3; with the irradiation time proceeding,the intensity of the free radicals increased in accordance to the rule of Y=1-e^-α_iPt; bamboo attenuation of delayed luminescence was fitted with a computer software into an ideal formula: I(t)=(A+Bt)^-2. The physical significance of the kinetic parameters was explored so as to study the theoretical basis for the automatic control of bamboo powder grafting copolymerization reaction

Key words: moso bamboo, free radical, delayed luminescence, UV-B