FTIR Spectra Study on the Film of Polyurethane Coated Urea Controlled-Release Fertilizer
WU Shu1, LI Qing-shan1*, RU Tie-jun2, WANG Li-min1, XING Guang-zhong1, WANG Jin-ming2
1. State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004, China 2. Sino-Arab Chemical Fertilizer Co., Ltd, (SACF), Qinhuangdao 066003, China
Abstract：The polyurethane films were prepared to wrap the urea in order to achieve a desirable release rate by mixing isocyanate, polyols and wax. The effect of wax, urea and isocyanate on the structure and properties of the films was investigated by FTIR. The structural changes were monitored as the polyurethane films together with the wrapped urea were immersed into ammonia water for 28 days, which is used to model soil conditions. The FTIR results showed that the width and intensity of the NH-free band increased remarkably with time, and all kinds of carbonly bands shifted to high wavenumber and their intensity increased obviously. The results suggest that the structure of the polyurethane films was destroyed more heavily in soil than in water, and this explains the relatively fast release rate of urea in soil. It was observed that the increase in the chemical crosslinking density in the polyurethane films can effectively decrease the release rate of the urea nitrogen in soil.
吴 舒1，李青山1*，茹铁军2，王利民1，邢广忠1，王金铭2 . 聚氨酯包裹尿素缓/控释肥膜结构的FTIR研究[J]. 光谱学与光谱分析, 2011, 31(03): 630-634.
WU Shu1, LI Qing-shan1*, RU Tie-jun2, WANG Li-min1, XING Guang-zhong1, WANG Jin-ming2 . FTIR Spectra Study on the Film of Polyurethane Coated Urea Controlled-Release Fertilizer. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2011, 31(03): 630-634.
[1] SU Xiao-wan, DU Jian-jun, JIA Zhen-yu, et al(粟晓万，杜建军，贾振宇，等). Chinese Agricultural Science Bulletin(中国农学通报), 2007, 23(12): 234. [2] Yan Dong, Wang Zhengyin. Agricultural Sciences in China, 2006, 5(5): 960. [3] Tang Shuanhu, Yang Shaohai, Chen Jiansheng, et al. Agricultural Sciences in China, 2007, 6(5): 586. [4] Wang Yong, Li Jian, Chen Xiaoyao. Journal of Wuhan University of Technolotgy-Mater, 2005, 20(2): 12. [5] NI Xiao-xue, LI Xiao-guang, ZHANG San-ping, et al. Journal of Wuhan University of Technolotgy-Mater, 2009, 24(6): 892. [6] LI Ming-hua, XIA Ru, ZHANG Yu-chuan. Journal of Wuhan University of Technolotgy-Mater, 2009, 24(5): 805. [7] GE Jin-jie, SHI Xing-hai, WU Rui, et al(戈进杰，施兴海，吴 睿，等). Acta Chimica Sinica(化学学报), 2001, 59(11): 2018. [8] XU Yi-fei, YANG Jing-quan, LI Shu-cai, et al(徐一飞，杨荆泉，李树材，等). China Plastics Industry(塑料工业), 2008, 36(11): 58. [9] Ni Boli, Liu Mingzhu, Lü Shaoyu. Chemical Engineering Journal, 2009, 155(3): 892. [10] MIAO Yi, SHI Tie-jun, HANG Guo-pei, et al(苗 毅，史铁钧，杭国培，等). Chemical Propellants & Polymeric Materials(化学推进剂与高分子材料), 2008, 6(2): 40. [11] ZHAO Pei-zhong, WANG Yuan-sheng, ZHU Jin-hua, et al(赵培仲，王源升，朱金华，等). Polymer Materials Science and Engineering(高分子材料科学与工程), 2008, 24(1): 71. [12] ZHAO Pei-zhong, WANG Yuan-sheng, ZHU Jin-hua, et al(赵培仲，王源升，朱金华，等). Polymer Materials Science and Engineering(高分子材料科学与工程), 2008, 24(4): 89. [13] LI Zai-feng, XIN Hao-bo, XING Zheng, et al(李再峰，辛浩波，邢 政，等). Polymer Materials Science and Engineering(高分子材料科学与工程), 1999, 15(4): 84. [14] LUO Ning, WANG De-ning, YING Sheng-kang(罗 宁，王得宁，应圣康). Polymer Bulletin(高分子通报), 1998, (3): 37.
