【摘要】 采用超声波分散法制备了聚偏氟乙烯(PVDF)/多壁碳纳米管(MWCNT)复合材料。利用扫描电子显微镜、差示扫描量热法和傅立叶变换红外光谱等方法研究了复合材料的形态,考察了MWCNT用量对复合材料结晶行为和力学性能的影响。结果表明,通过超声处理,PVDF和MWCNTs之间产生了相互作用,复合体以球状的形式存在。MWCNTs的引入导致具有压电性的β相形成和屈服强度的提高。根据实验结果,对PVDF/MWCNT复合球体和β相的形成机理提出了可能的解释。更多还原

【Abstract】 Poly(vinylidene fluoride) /multiwalled carbon nanotube (PVDF/MWCNT) nanocomposites were prepared by sonication dispersion method.Morphology,crystalline structure and mechanical properties of the nanocomposites have been investigated by scanning electron microscope,differential scanning calorimeter,Fourier transform infrared spectroscopy and tensile test.The results indicate that there was an interaction between PVDF molecules and MWCNTs by sonication treatment.A spherical structure was observed in the PVDF/MWCNTs nanocomposites.Also,the crystallization and mechanical behavior were influenced by the addition of MWCNTs into PVDF matrix.The formation of β phase was enhanced with increasing MWCNTs content.The tensile test shows that the yield strength increases with increasing MWCNT loading.For these changes in morphology and crystalline structure,some possible explanations were proposed based on the experimental results.更多还原