IPBC在溶液及处理材中的紫外光降解特性OA北大核心CSTPCD

The ultraviolet(UV)photolysis characteristics of 3-iodo-2-propynyl butylcarbamate(IPBC)in different solutions and treated wood were studied.High-performance liquid chromatography(HPLC)was used to investigate the effects of UV wavelength,irradiation intensity,solvent type,initial mass concentration of IPBC,and irradiation time on the UV degradation performance of IPBC in solutions,as well as the effects of temperature and initial moisture content on the UV degradation performance of IPBC in treated wood.Finally,ultra-high performance liquid chromatography-tandem mass spectrometry(UPLC-MS/MS)was used to identify the UV degradation products of IPBC in n-hexane.The results showed that as the wavelength of UV decreases,the irradiation intensity increases and the irradiation time prolongs,the retention rate of IPBC decreases;the order of UV degradation rate of IPBC in different solvents was n-hexane>methanol>water.The UV degradation rate of IPBC in solution was in accordance with the first-order kinetic model(R2＞0.99).Raising the temperature and increasing the initial moisture content of wood promotes the UV degradation of IPBC in wood.Eight types of UV degradation products of IPBC were identified.This study provided a theoretical basis for the UV degradation of the IPBC-treated wood in outdoor applications.