自然光和土培条件下膜材红外吸收光谱变化  

Variations in IR Spectra of Three Coating Materials under Outdoor Illumination and Pot Incubation

作　　者：刘兴斌[1,2] 陈利军[1] 武志杰[1] 王月[3] 张玉兰[1,2] 李东坡[1] 

机构地区：[1]中国科学院沈阳应用生态研究所,辽宁沈阳110016 [2]中国科学院研究生院,北京100039 [3]沈阳农业大学土地与环境学院,辽宁沈阳110161

出　　处：《光谱学与光谱分析》2010年第2期323-326,共4页Spectroscopy and Spectral Analysis

基　　金：财政部、农业部国家公益性行业科研专项计划项目(2007-3);国家科技支撑计划项目(2006BAD10B01)资助

摘　　要：新型可降解包膜肥料是目前肥料研究领域中的热点。相关研究主要集中在包膜材料对包膜肥养分释放的作用机制上,而膜材施入土壤后结构是否发生变化的可用信息较少,这些信息是评价膜材是否环境友好的关键。研究分别以聚乳酸(PLA)、聚丁二酸丁二醇酯(PBS)和聚碳酸酯(PC)为主要材料配制的膜材为对象,研究它们在自然光照、土培前后红外吸收光谱的变化,来研究这3类物质在自然光照和土培条件下的降解。为期4个月培养后膜材的红外光谱显示:3种膜材在培养期间都有不同程度的结构变化,这说明3种膜材均具有降解性能,且膜材土培降解强度大于自然光照降解。PC的降解性能最强,其次是PLA和PBS。PLA和PC在黑土中的降解性能强于棕壤,而PBS则相反。In the present paper, polylactie acid （PLA）, poly （butylenes succinate） （PBS） and polycarbonate （PC） were selected as test coating materials, and the variations in their IR spectra under conditions of outdoor illumination and pot incubation were studied, aimed to approach the degradability of these coating materials under sunlight and in soil. The IR spectra showed that af- ter 4 months under outdoor illumination and pot incubation with brown soil and black soil, all the test coating materials had defi- nite variations in their structural configuration, being more obvious under pot incubation than under outdoor illumination, which suggested that the test materials were degradable, and the degradability was greater in soil than under sunlight. PC had the grea- test degradability, followed by PLA, and PBS. The degradability of PLA and PC was greater in black soil than in brown soil, while that of PBS was reverse.

关 键 词：红外光谱 降解 聚乳酸 聚丁二酸丁二醇酯 聚碳酸酯 

分 类 号：O657.3[理学—分析化学]