1，3-丙二胺-纳米金刚石衍生物的合成与分散性研究

Synthesis and dispersibility of derivative of 1,3-propanediamine with nanodiamond

分散性差是严重制约纳米金刚石应用的重要原因。采用1,3-丙二胺修饰纳米金刚石(ND),合成出结构新颖的1,3-丙二胺-纳米金刚石衍生物(ND-NH2)。FTIR分析表明,1,3-丙二胺分子通过酰胺键与ND共价键接。ND-NH2中ND的含量约为29.97%(质量分数),并可溶于无机或有机酸水溶液,以及丙酮、CH2Cl2、NMP、DMF、DMAc、DMSO等有机溶剂。激光粒度和TEM分析表明,经1,3-丙二胺改性后,纳米金刚石的分散性显著改善,其平均粒径从3.301μm降低至0.166μm,为在复合电镀和润滑领域的进一步研究与应用提供了良好基础。

Bad dispersibility is a major cause that hinders the application of nanodlamond （ND） severely, in tins paper nanodiamond was covalently functionalized with 1,3-propanediamine to obtain a novel derivative （ND-NH2）. FTIR results showed that the 1,3-propanediamine molecules were covalently attached to the nanodia-monds through amide linkages. Content of the nanodiamond in the ND-NH2 is about 29.97wt%. The ND-NH2 dissolves not only in inorganic or organic acidic aqueous solution, but also organic solvents such as acetone, CH2 Cl2 ,NMP, DMF,DMAc and DMSO. Laser Granularity and TEM results further indicated the dispersibility of the nanodiamond was much improved： the average granularity of the nanodiamond decreased from 3. 301-0. 166μm by the modification of 1,3-propanediamine. This might be a beneficial base for next study and application of nanodiamond in fields of complex electroplating and lubrication.