光谱学与光谱分析 |
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FTIR Spectra Study on the Swellbility and Controlled-Release Mechanism of Polyurethane Coated Urea |
WU Shu, RU Tie-jun, WANG Jin-ming |
Sino-Arab Chemical Fertilizer Co., Ltd., (SACF), Qinhuangdao 066003, China |
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Abstract The nutrient release experiment of polyurethane coated urea (PCU) was carried out in pure water at 25 ℃. With the release of urea, the structural variation of polyurethane coating was investigated by Fourier transform infrared spectroscopy (FTIR), then a series of curves were collated and compared so as to better reflect the relation between diffusion rate of urea and coating structure. It was found that when the nutrient was released by 50% wt, new absorption peaks at 3 435, 3 342, 1 671, 1 621, 1 448 and 1 159 cm-1 appear in the FTIR spectra of polyurethane coating, moreover, the height of these absorption peaks was increased gradually when the nutrient was released by 70% wt, more importantly, these new absorption peaks are consistent with the characteristic absorption peaks of urea fertilizer, the spectra of urea were mainly characterized by bands at 3 440, 3 346, 1 672, 1 621 and 1 461 cm-1. The results show that the IR spectra variation was caused by the content of urea, existing in the polyurethane coating, and was increased gradually, The more the urea content, the greater the swelling degree of the polyurethane coating. The swelling of polyurethane coating leads to the pores size change, and release rate is increased, so the “S” pattern curve of the nitrogen accumulative release is formed.
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Received: 2012-10-21
Accepted: 2013-01-20
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Corresponding Authors:
WU Shu
E-mail: qhdwushu@163.com
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[1] RU Tie-jun, WANG Jin-ming, CAO Yi-ping(茹铁军, 王金铭, 曹一平). Phosphate & Compound Fertilizer(磷肥与复肥), 2010, 25(6): 50. [2] CHEN Jian-hui,CAO Yi-ping,XU Han, et al(陈剑慧, 曹一平, 许 涵, 等). Plant Nutrition and Fertilizing Science(植物营养与肥料学报), 2002, 8(1): 44. [3] ZHANG Hai-jun, WU Zhi-jie, CHEN Li-jun(张海军, 武志杰, 陈利军). Scientia Agricultura Sinica(中国农业科学), 2003, 36(10): 1177. [4] Ni Boli, Liu Mingzhu, Lü Shao. Chemical Engineering Journal, 2009, 155(3): 892. [5] LI Dong-po, WU Zhi-jie, LIANG Cheng-hua, et al(李东坡, 武志杰, 梁成华, 等). Transactions of the Chinese Society of Agricultural Engineering(农业工程学报), 2007, 23(12): 218. [6] LI Qing-shan, WU Shu, RU Tie-jun, et al(李青山, 吴 舒, 茹铁军, 等). Journal of Wuhan University of Technolotgy-Mater. Sci.Ed.(武汉理工大学学报·材料科学版), 2012, 21(1): 126. |
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