RESt_3/NiDBC可环境消纳聚乙烯地膜研制及NiDBC晶体结构表征  

Gropingly prepared environmentally digestible PE plastic mulching films with RESt_3-NiDBC compound photosensitizer and the characterization of crystal structure for the NiDBC

作　　者：肖荔人[1] 

机构地区：[1]福建师范大学化学与材料学院,福建省改性塑料技术开发基地,福州350007

出　　处：《环境工程学报》2008年第12期1724-1728,共5页Chinese Journal of Environmental Engineering

基　　金：福建省重大专项专题(2007HZ0001-1);福建省重大前期研究(2005HZ1004)

摘　　要：以硬脂酸共生稀土(RESt3)和二丁基二硫代氨基甲酸镍(NiDBC)为复合光敏剂研制可环境消纳聚乙烯(PE)地膜,采用X-射线单晶衍射仪表征了NiDBC晶体结构,对其光敏调节机理作了初步探讨。将研制的PE地膜进行人工加速老化实验、户外曝晒实验及自然环境土壤填埋试验,以断裂伸长率保留率(F)和羰基指数(CI)作为评价PE地膜的光降解性能指标。结果表明:改变RESt3/NiDBC的用量能生产出不同光降解诱导期的PE地膜,可实现PE地膜降解的可控性;将经生物活性剂表面处理过的白云石粉,N、P、K肥料和RESt3/NiDBC复合光敏剂按一定比例添加到PE地膜中,既能有效提高其降解的彻底性,又可适当改良酸性土壤。The compounds of FeSt3 and NiDBC were employed to be photosensitizer for preparing environmental-friendly PE plastic films. And the PE plastic films were tested by artificial accelerated aging,outdoor exposing and embed testing in the natural environmental soil. The results showed that adjust the proportion of NiDBC to RESt3 could produce various PE plastic films with different photo-initiated degradable period, which might be employed to control the degradable capacity for the PE plastic films, and that the photosensitizer which was the compounds of bio-activated dolomite, fertilizer containing N, P and K, FeSt3 and NiDBC, could not only promote the degradable degree but also improve the nature of acidic soil in a way as its formulation was appropriate. The mechanism of photosensable control was also been discussed based on the crystal structure data characterized for the NiDBC through X-ray diffraction.

关 键 词：稀土复合光敏剂 可环境消纳 聚乙烯地膜 光诱导避光继续降解 晶体结构 

分 类 号：TQ320[化学工程—合成树脂塑料工业]