Abstract The coating processing condition was used for the research of coating ammonium nitrate particles by means of the surfactants as coating materials which have the same polar heads with different non-polar straight hydrocarbon tails or the same non-polar straight hydrocarbon tails with different polar heads, in order to investigate the relationships between structures of surfactants and their anti-hygroscopicity used in ammonium nitrate particles coated. Furthermore, the relationships and possibly mechanism were analyzed and discussed based on both the experimental results and the selected coating processing, basic property of materials and behaviors of material in coating processes. The experimental results indicated that, the anti-hygroscopicity performance of C16-alchol and C18-acid were best ones within the all groups of selected surfactants with polar heads. The best declines of hygroscopicity of ammonium nitrate particles coated were 29.26% for C16-alcohol and 24.0% for C18-acid. And for the later, the anti-hygroscopicity performance of C18-acid and C20-acid were best ones within the all groups of selected surfactants with longer tails, and that of C16-alcohol and C14-amine were best ones with shorter tails, their best declines were 24.0%, 20.39%, 29.26% and 18.6%, respectively. The mechanism analysis results indicated that the decline of hygroscopicity were influenced by both the coating processing condition and the material properties, such as the polarity, hydroscopicity, solublity in solves and especially the surfactivity of the used surfactants, and the later, i.e. the material properties would play an important role when the processing condition and solvent used in coating ammonium nitrate particles were fixed. Therfore, the property of coating materials which are depending on their structures and the bahaviours of coating material molecules in coating processes dominated commonly and ultimatly anti-hydroscopicity of coated ammonium nitrate particles, under a selected coating processing condition. This work provides new insights on understanding the relationship between structure of surfactants and anti-hygroscopicity performance to further improve the anti-hygroscopicity performance of ammonium nitrate particles.

中文翻译：

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表面活性剂结构与硝酸铵颗粒抗吸湿性能的关系

摘要 采用包衣工艺条件，研究以表面活性剂为包覆材料，极性头相同而非极性直烃尾不同或非极性直烃尾相同而极性头不同的包覆工艺。 ，为了研究表面活性剂的结构与其在硝酸铵颗粒包覆中使用的抗吸湿性之间的关系。此外，基于实验结果和所选的涂层工艺、材料的基本性质和材料在涂层过程中的行为，分析和讨论了它们之间的关系和可能的机制。实验结果表明，C16-醇和C18-酸的抗吸湿性能在所有选择的极性头表面活性剂中是最好的。包覆的硝酸铵颗粒吸湿性的最佳下降为 C16-醇为 29.26%，C18-酸为 24.0%。而对于后者，C18-酸和C20-酸的抗吸湿性能在所有选择的长尾表面活性剂中最好，而C16-醇和C14-胺的抗吸湿性能则是短尾，它们的最佳跌幅分别为 24.0%、20.39%、29.26% 和 18.6%。机理分析结果表明，吸湿性的下降受涂层加工条件和材料性质的影响，如极性、吸湿性、溶液中的溶解度，特别是所用表面活性剂的表面活性，后者，即当包覆硝酸铵颗粒所用的工艺条件和溶剂固定时，材料性能将起重要作用。因此，在选定的涂层工艺条件下，涂层材料的性能取决于其结构和涂层过程中涂层材料分子的行为，通常并最终决定了涂层硝酸铵颗粒的抗吸湿性。该工作为理解表面活性剂结构与抗吸湿性能之间的关系提供了新的见解，以进一步提高硝酸铵颗粒的抗吸湿性能。在选定的涂层工艺条件下，涂层材料的性能取决于涂层材料的结构和涂层工艺中涂层材料分子的行为，通常并最终决定涂层硝酸铵颗粒的抗吸湿性。该工作为理解表面活性剂结构与抗吸湿性能之间的关系提供了新的见解，以进一步提高硝酸铵颗粒的抗吸湿性能。在选定的涂层工艺条件下，涂层材料的性能取决于涂层材料的结构和涂层工艺中涂层材料分子的行为，通常并最终决定涂层硝酸铵颗粒的抗吸湿性。该工作为理解表面活性剂结构与抗吸湿性能之间的关系提供了新的见解，以进一步提高硝酸铵颗粒的抗吸湿性能。