CAJ | 학술논문

叙述了TiO2表面发生光催化反应的反应过程，对PVC—U管材进行了紫外灯照射试验。结果表明：①TiO2在表面发生光催化反应过程中与样品含有的铅化合物发生氧化还原反应生成了黑色的单质铅，从而产生灰黑色斑；②金红石型钛白粉只能减缓变色速度，不能完全避免问题的发生；③采用PVC收缩膜包装PVC—U管材时会促进灰黑色斑的产生。
서술료TiO2표면발생광최화반응적반응과정，대PVC—U관재진행료자외등조사시험。결과표명：①TiO2재표면발생광최화반응과정중여양품함유적연화합물발생양화환원반응생성료흑색적단질연，종이산생회흑색반；②금홍석형태백분지능감완변색속도，불능완전피면문제적발생；③채용PVC수축막포장PVC—U관재시회촉진회흑색반적산생。
The photocatalyfic reaction process on surface of TiCh is described. PVC,-U tubes were experimented on exposure to a UV lamp. The results showed that （1） black elemental lead is generated from the rcdoxreaction between TiO2 and lead compounds contained in samples during the photoeatalytic reaction of TiO2 on surface, and thus forming gray-black spots; （2） rutile type of titanium white powder can only slow the rate of discoloration and can not completely prevent discoloration; （3） wrapping PVC-U tubes with shrinkable PVC films will prompt the formation of gray-black spots.