【摘要】 在超声改善MWCNT在不饱和聚酯树脂的分散性的基础上,通过非共价官能团化的方法引入处理过的天然填料柠檬酸化纤维素(CNFCA)来增强不饱和聚酯树脂,并采用偏光显微镜、旋转流变仪、透射电子显微镜、扫描电子显微镜、万能试验机等对不饱和聚酯树脂纳米复合材料的结构和性能进行了研究。结果表明,MWCNT的加入可以使不饱和聚酯复合材料的拉伸性能提高,通过溶剂辅助超声的方法可以使MWCNT的分散性提高,从而进一步提高不饱和聚酯纳米复合材料的力学性能;CNFCA的加入使得不饱和聚酯树脂纳米复合材料的力学性能得到较大程度的提高;超声分散和研磨的方法可以有效地将CNFCA和MWCNT结合在一起,从而提高其在不饱和聚酯中的分散能力。更多还原

【Abstract】 A surface modification was performed to improve the dispersibility of multi-walled carbon nanotubes(MWCNT)using an ultrasonic method. Citrated cellulose(CNFCA)as a natural filler was also surface modified by means of a noncovalent functionalization method. MWCNT/CNFCA-reinforced unsaturated polyester resin(UPR)nanocomposites were prepared and their structure and performance were investigated by using polarizing optical microscope,rotation rheometer,SEM,TEM and universal test machine. The results indicated that the tensile properties of the nanocomposites were improved with the addition of MWCNT. The dispersibility of MWCNTs could be improved with the aid of solvent ultrasound,resulting in a further improvement in the mechanical properties of the nanocomposites. The addition of CNFCA greatly improved the mechanical properties of UPR/MWCNT composites. A combination of ultrasonic dispersion and grinding method can make CNFCA and MWCNT bind together,improving their dispersibility in UPR resin.更多还原