Effect of Filler Treatment on the Release Properties of Coating on Urea Granules

被引：5
|
作者：
Li, Lixia [1 ,2 ]
Cao, Bing [1 ,2 ]
Sun, Yumeng [1 ,2 ]
Yi, Wenping [1 ,2 ]
Ni, Xiaohui [1 ,2 ]
Xiao, Qiang [1 ,2 ]
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
来源：
POLYMER-PLASTICS TECHNOLOGY AND MATERIALS | 2019年 / 58卷 / 01期
基金：
美国国家科学基金会;
关键词：
Calcination; coating; composite; controlled release; urea; MESOPOROUS SILICA; PERFORMANCE; NANOPARTICLES; FERTILIZER;
D O I：
10.1080/03602559.2018.1466164
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
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.
引用
收藏
页码：77 / 82
页数：6
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