文献类型： 外文期刊
作者： Li, Lixia 1 ; Cao, Bing 1 ; Sun, Yumeng 1 ; Yi, Wenping 1 ; Ni, Xiaohui 1 ; Xiao, Qiang 1 ;
作者机构： 1.Beijing Acad Agr & Forestry Sci, Inst Plant Nutr & Resources, Beijing, Peoples R China
2.Res Ctr Beijing Municipal Slow & Controlled Relea, Beijing, Peoples R China
关键词： Calcination; coating; composite; controlled release; urea
期刊名称：POLYMER-PLASTICS TECHNOLOGY AND MATERIALS （ 影响因子：2.371； 五年影响因子：2.371 ）
ISSN： 2574-0881
年卷期： 2019 年 58 卷 1 期
页码：
收录情况： SCI
摘要： Polyurethane composite coatings on urea granules were prepared by SBA-15 mesoporous silica (in as-synthesized and calcined forms) as a pseudo-crosslinker without any other chain extenders. The calcination of mesoporous silica leaded to reduction of hydroxyl groups and increase of mesopores. The composite coating containing calcined SBA-15 showed enhanced controlled release properties compared with the other two coatings. At the loading content of 1 wt%, the initial release rate and release duration of urea coated by polyurethane/calcined SBA-15 composite were 0.08% and 83 d, respectively. It is shown that the calcination played an important role in controlling the properties of composite coating.
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