Granular urea‐formaldehyde slow‐release fertilizer with superabsorbent and moisture preservation
Granular urea‐formaldehyde slow‐release fertilizer with superabsorbent and moisture preservation
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DOI：
10.1002/app.22892
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发表时间：
2006-03
影响因子：
3
通讯作者：
M. Guo;Mingzhu Liu;R. Liang;A. Niu
中科院分区：
文献类型：
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作者：
M. Guo;Mingzhu Liu;R. Liang;A. Niu
为提高肥料和水资源的同时利用率，将缓释技术与高吸水性聚合物相结合，研制出一种新型高吸湿保墒缓释肥料。采用反相聚合技术制备涂层。元素分析结果表明，该产品含氮量为22.58%，在自来水中室温膨胀2 h，其吸水率为自重的94倍。对N的缓释行为及在土壤中的吸水性和保水性能的测试结果表明，该产品不仅具有良好的缓释性能，而且具有优异的吸水性和保水能力。这比普通的缓释或控释肥料有显著的优势。考察并优化了引发剂用量、交联剂用量、反应时间、丙烯酸中和度等因素对吸水性的影响。同时，还采用了一种较为新颖、简便的方法制备均质脲醛颗粒。©2006 Wiley期刊公司生物质化学工程学报，2006,31 (2):393 - 398
To improve the utilization of fertilizer and water resource at the same time, a new type of slow-release fertilizer with superabsorbent and moisture preservation was developed, with the combination of slow-release technique and superabsorbent polymers. The coatings were formed by the inverse phase polymerization technique. The element analysis results showed that the product contained 22.58% nitrogen element, and the water absorbency of the product was 94 times its own weight if it was allowed to swell in tap water at room temperature for 2 h. The results of the slow-release behavior of N and the water absorbency and retention properties in soil showed that the product not only had good slow-release property but also had excellent water absorbency and water retention capacity, which was a significant advantage over the normal slow-release or controlled-release fertilizers. The effects of the amount of initiator, crosslinker, reaction time, and the degree of neutralization of acrylic acid on water absorbency were investigated and optimized. At the same, a rather new and simple method was used to make homogeneous urea-formaldehyde granules. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 99: 3230–3235, 2006