基于水性光敏聚合物的MCNTs分散液的制备及性能研究

以丙烯酸(AA)、对苯乙烯磺酸钠(SS)、甲基丙烯酸缩水甘油酯(GMA)为原料合成了一种水性光敏聚合物PSAG用于分散多壁碳纳米管(MCNTs)。采用核磁共振对PSAG进行了结构表征。研究发现,在水溶液中,PSAG对MCNTs有很好的分散性能,在相同分散条件下,其分散性能不逊色于商用聚合物分散剂:聚乙二醇辛基苯基醚(Triton X-100)和聚苯乙烯磺酸钠(PSS)。并且,PSAG-MCNTs涂层经紫外光曝光后可以形成交联结构,大大提高涂层的耐水性,同时具有较高的导电性能。     

A Study on the Wear Resistance of Nano-Material/E51

Epoxy resin modified by nanometric γ-alumina or multi-walled carbon nanotubes (MCNTs) was prepared with solution mixingmethod, and the wear resistance of the composite was studied. The results show that when an optimum amount of nanometricalumina or MCNTs is filled in epikote51 (E51), the wear resistance of the composite will increase. When 8 wt pct nanometricγ-alumina is filled in E51, the wear resistance of the composite increases to 230%. When 10% MCNTs is filled in E51, thewear resistance of the composite increases to 226%. When nanometric alumina is filled in, the wear resistance of modifiedepikote51 will increase as the cure temperature is heightened.     

低速球磨对多壁碳纳米管球磨特性的影响研究

利用低速球磨机对催化化学气相沉积法制备的多壁碳纳米管进行了球磨。透射电子显微镜实验结果表明。低速球磨机球磨可以使多壁碳纳米管开口和变短，球磨5h后碳纳米管开口和变短效果已经很明显；球磨20h后，发现碳纳米管变短到出现明显的团聚现象。X射线衍射实验结果表明，球磨20h后仍为多壁碳纳米管，每一层碳管仍为规则的石墨化结构。     

MnO2/MCNTs的制备及电容性能的研究

利用酸处理使多壁碳纳米管(MCNTs)表面功能化,继而结合原位化学液相沉淀法,成功制备了MnO2/MCNTs二元复合材料,并采用XRD、FTIR、SEM和TEM研究了材料的晶体结构和表面形态,运用循环伏安和交流阻抗方法研究其电化学性能.结果表明:MnO2/MCNTs二元复合材料的电容性能优于纯MnO2,且不同的MCNTs管径及长度对MnO2/MCNTs二元复合材料电化学性能及表面有影响.