Analysis of the Character of Film Decomposition of Starch Acetate (SA) Coated Urea by Infrared Spectrum
LI Dong-po1,2, WU Zhi-jie1*, LIANG Cheng-hua2, CHEN Li-jun1, ZHANG Yu-lan1, NIE Yan-xia1, 3
1. Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China 2. College of Land and Environmental Sciences, Shenyang Agricultural University, Shenyang 110161, China 3. Graduate University of Chinese Academy of Sciences, Beijing 100049, China
Abstract：The degradability characteristics of film with 4 kinds of starch acetate coated and inhibitors amended urea were analyzed by FTIR, which was purposed to supply theoretical basis for applying starch acetate coated urea fertilizers in farming. The result showed that the chemical component, molecule structure and material form of the membrane were not changed because of adding different inhibitors to urea. The main peaks of the film degradation process were brought by the H—O, —OH, CO2, CO, —CH2, —CH3, C—O, C—O—H and C—O—C vibrancy in asymmetry and symmetry. In brown soil, the trend of absorbing value of the most high peak was 0＞15＞30＞60＞90＞120＞150＞310 d. The infrared spectra of 4 kinds of fertilizers were not different remarkably, and the film was comparatively slowly degraded before 15 d. But a majority of the film had been already degraded after 150 days. The main components of film materials were degraded fastest in 310 days. The speed of film degradation wasn’t more impacted by different inhibitors. The characteristic of starch acetate film degradation may be monitored entirely and degradation speed difference of the film could be represented through infrared spectrum.
李东坡1，2，武志杰1*，梁成华2，陈利军1，张玉兰1，聂彦霞1, 3 . 红外光谱分析醋酸酯淀粉包膜尿素膜降解特征[J]. 光谱学与光谱分析, 2012, 32(06): 1519-1525.
LI Dong-po1,2, WU Zhi-jie1*, LIANG Cheng-hua2, CHEN Li-jun1, ZHANG Yu-lan1, NIE Yan-xia1, 3 . Analysis of the Character of Film Decomposition of Starch Acetate (SA) Coated Urea by Infrared Spectrum . SPECTROSCOPY AND SPECTRAL ANALYSIS, 2012, 32(06): 1519-1525.
