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Free Radical and Delayed Luminescence of Fibre of Moso Bamboo after UV-B Irradiation

紫外光下毛竹颗粒的自由基与延迟发光


利用ESR电子自旋共振波谱仪和BPCL生物弱光探测仪分别测量紫外光辐照后毛竹颗粒的自由基波谱和延迟发光的光谱。经测试,毛竹自由基的光谱分裂因子g=2.003 3,自由基的强度随着辐照时间按Y=1-eiPt规律增加;毛竹延迟发光的衰减规律通过计算机软件拟合筛选出最理想的数学公式I(t)=(A+Bt)-2,并对各动力学参数的物理意义进行深入探讨,为实现竹粉接枝共聚反应的自动控制探索了理论基础。

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-eiPt; 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


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