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Open AccessReview

Coating Methods for Surface Modification of Ammonium Nitrate: A Mini-Review

by Baha I. Elzaki 1,2 and Yue Jun Zhang 1,*
1
School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, Jiangsu, China
2
Department of Chemical Engineering, College of Engineering, Karary University, Omdurman 12304, Sudan
*
Author to whom correspondence should be addressed.
Academic Editor: Jiyoung Kim
Materials 2016, 9(7), 502; https://doi.org/10.3390/ma9070502
Received: 20 April 2016 / Revised: 6 June 2016 / Accepted: 15 June 2016 / Published: 23 June 2016
Using ammonium nitrate (AN) as a propellant oxidizer is limited due to its hygroscopicity. This review consolidated the available information of various issues pertaining to the coating methods of the surface modification of ammonium nitrate for reducing its hygroscopicity. Moreover this review summarizes the recent advances and issues involved in ammonium nitrate surface modification by physical, chemical and encapsulation coating methods to reduce the hygroscopicity. Furthermore, coating materials, process conditions, and the hygroscopicity test conditions are extensively discussed along, with summaries of the advantages and disadvantages of each coating method. Our findings indicated that the investigation and development of anti-hygroscopicity of AN, and the mechanisms of surface modification by coating urgently require further research in order to further reduce the hygroscopicity. Therefore, this review is useful to researchers concerned with the improvement of ammonium salts’ anti-hygroscopicity. View Full-Text
Keywords: ammonium nitrate; chemical coating; encapsulation coating; hygroscopicity; modification surface; physical coating ammonium nitrate; chemical coating; encapsulation coating; hygroscopicity; modification surface; physical coating
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Elzaki, B.I.; Zhang, Y.J. Coating Methods for Surface Modification of Ammonium Nitrate: A Mini-Review. Materials 2016, 9, 502.

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