高等学校化学学报Issue(2)：316-321,6.DOI:10.7503/cjcu20150660
聚α烯烃光催化降解的机理研究
Study on the Mechanism of Photocatalytic Degradation of Poly(α-olefin)†
摘要
Abstract
Poly(α-olefin)(PAO, commonly used rolling base oil) attached to the surface of copper foil was degradated using photocatalytic microreactor. The chemical state, free radical and functional groups during the degradation process were detected by X-ray photoelectron spectroscopy ( XPS ), electron spin resonance spectroscopy(ESR) and Fourier transform infrared spectroscopy(FTIR). At last, the photocatalytic degrada-tion mechanism was discussed. The results show that the introduction of oxygen groups and the CO2 desorption exist in the degradation process and the main free radical is hydroxyl radical(·OH). The degradation process is accompanied with the increase of —OH and the decrease of C—H bond. In the process of photocatalytic degradation of PAO, ·OH attacking polymer is from the beginning of substitution reaction, firstly, ·OH substituted the hydrogen atom of methyl group, then the formed —OH changes to carboxyl and aldehyde, and then small organic molecules are formed. This process continues and the polymer molecular chain become shorter and shorter and produce only CO2 , H2 O and other inorganic substances at last.关键词
聚α烯烃/自由基/官能团/降解机理Key words
Poly(α-olefin)(PAO)/Free radical/Functional group/Degradation mechanism分类
化学化工引用本文复制引用
彭展南,刘雪峰,林冠群..聚α烯烃光催化降解的机理研究[J].高等学校化学学报,2016,(2):316-321,6.基金项目
国家科技支撑计划项目(批准号:2011BAE23B02)和中央高校基本科研业务费(批准号：FRF-TP-10-002B)资助.? Supported by the National Key Technology Support Program, China( No.2011BAE23B02) and the Fundamental Research Funds for the Central Universities, China(No. FRF-TP-10-002B) （批准号:2011BAE23B02）
