聚乙烯/CaO复合材料在堆肥条件下的降解性能初探  

Preliminary study on degradation property of PE/CaO composite materials under composting conditions

作　　者：杨文卿[1,2] 卓倩[1,2] 肖荔人[2] 许兢[2] 陈庆华[1,2] 

机构地区：[1]福建师范大学闽南科技学院,闽南科技学院资源高值化研究所,福建泉州362332 [2]福建师范大学化学与材料学院,福建师范大学环境材料开发研究所,福建福州350007

出　　处：《环境污染与防治》2012年第7期24-28,35,共6页Environmental Pollution & Control

基　　金：福建省科技重大专项专题(No.2007HZ0001-1)

摘　　要：以光钙型环境友好塑料——聚乙烯(PE)/CaO复合材料作为研究对象,通过自制的污泥堆肥与材料老化综合反应器,利用扫描电镜(SEM)与傅立叶红外光谱(FTIR)分析仪对比研究了其在高温好氧堆肥条件下的降解情况。结果表明,PE/CaO复合材料在受控高温好氧堆肥条件下,具有比纯PE材料更优的可堆肥性能。PE/CaO复合材料的CaO颗粒能吸收堆肥环境中的H2O和CO2而生成相应的产物Ca(OH)2或CaCO3,发生涨大与脱落,从而使复合材料的表面产生孔洞,而这些孔洞不仅增大了材料与环境的接触面积,同时更为降解细菌进入材料内部提供了通道,大大加速了材料的降解速度。The degradation of polyethylene（PE）/CaO composite material, a typical photo-calcium degradable plastic,during the high temperature aerobic composting process was studied in self-made sludge eomposting and mate- rial aging integrate reactor. The scanning electron microscope （SEM） and fourier transform infrared spectrum （FTIR） were applied to characterize the variation of the composite material during the composting process. The results showed that compare to pure PE,PE/CaO composite materials was much more compostable under the condition of controlled aerobic composting. Because the CaO particle in PE/CaO composite materials could absorb H2O and CO2 in compos- ting environment,the corresponding product Ca（OH）2 and CaCO3 enlarged the material particle and then slipped off, and lots of holes were produced on the surface of PE/CaO composite materials. These holes not only increased the contact area between material and environment, but also provide passage for degradable bacteria to enter the inside of material, which enchanced the degradation rate of materials.

关 键 词：光钙型环境友好塑料 堆肥 降解 可环境消纳 

分 类 号：X705[环境科学与工程—环境工程]