论文部分内容阅读
研究硝酸铵表面单分子层自组装膜对硝酸铵晶型转变的影响 ,分析单分子层组装前后硝酸铵表面形貌 ,了解单分子层与硝酸铵相互作用机理 .利用单分子层自组装技术对硝酸铵表面改性 ,用 DSC研究改性硝酸铵晶型的变化 ,用扫描电子显微镜观察了改性硝酸铵颗粒表面的表面形貌 ;用光电子能谱测定了改性硝酸铵的表层结构 .用十八胺 /二甲苯体系包覆的硝酸铵的吸湿率降至纯硝酸铵的 58.6% ;它的 → 相的转变温度 ( 56.0 0℃ )较未包覆的 ( 53.67℃ )明显后移 ,而且 → 相的转变消失 ;颗粒表面变得光滑 ;十八胺分子通过氢键与硝酸铵的 NH+4 相互作用 ,而 CTAB分子通过静电作用力与硝酸铵的 NO-3相互作用 .用单分子层自组装技术改性硝酸铵具有潜在应用价值
The effect of monolayer self-assembled monolayer on the crystal transition of ammonium nitrate was investigated, and the surface morphology of ammonium nitrate before and after monolayer assembly was analyzed to understand the interaction mechanism between monolayer and ammonium nitrate. The surface modification of ammonium nitrate was studied. The morphology of modified ammonium nitrate was investigated by DSC. The surface morphology of the modified ammonium nitrate particles was observed by scanning electron microscopy. The surface structure of the modified ammonium nitrate was determined by photoelectron spectroscopy The hygroscopicity of ammonium nitrate coated with octadecylamine / xylene system decreased to 58.6% of that of pure ammonium nitrate. The transition temperature of its phase (56.0 ℃) was obviously higher than that of uncoated (53.67 ℃), and → the phase transition disappears; the particle surface becomes smooth; the octadecylamine molecule interacts with the NH + 4 of ammonium nitrate via hydrogen bonding and the CTAB molecule interacts with NO-3 of ammonium nitrate by electrostatic force. Self-assembly technology modified ammonium nitrate has potential application value