Effect of Filler Treatment on the Release Properties of Coating on Urea Granules
Authors:
- 8 June 2018
- journal article
- research article
- Published by Taylor & Francis in Polymer-Plastics Technology and Materials
- Vol. 58 (1) , 77-82
Abstract
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.Keywords
Funding Information
- National Key Research and Development Program of China (2017YFD0200705)
- National Science Foundation of China (31301846, 31301847)
- the national development plan focused on special projects (2017YFD0800604)
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