MWCNTs／PMMA复合材料制备及力学性能研究

目的：制备多壁纳米碳管（MWCNTs），并将其用于聚甲基丙烯酸甲酯（PMMA）增强，研究其力学性能变化。方法：用化学气相沉积（ChemicalVaporDeposition，CVD）法制备MWCNTs，将1mgMWCNTs均匀分散于15mL牙托水中，制备MwCNTs／PMMA复合材料，测试复合材料的力学性能，观察断面形貌。结果：制备出MWCNTs均匀分散的MwCNTs／PMMA复合材料，复合材料的拉伸强度、延伸率较对照组有显著提高（P〈0．05），弯曲强度与对照组相比无明显差异（P〉0．05）。复合材料断面可见碳管与树脂之间结合良好，MWCNTs均匀弥散分布在树脂基体中。结论：应用CVD法制备MWCNTs用于增强基托树脂，可有效改善其力学性能。

Fabrication and mechanical properties of MWCNTs/PMMA composite materials

Objective:To fabricate multi-walled carbon nanotubes(MWCNTs) for the reinforcement of polymethyl methacrylate(PMMA) and study its mechanical properties.Methods:The chemical vapor deposition(CVD) technique was used to fabricate MWCNTs.MWCNTs(1mg) were evenly distributed into methyl methacrylate(15mL)to fabricate MWCNTs/PMMA composite materials.The mechanical properties were tested and its fracture morphology was studied.Results:MWCNTs/PMMA composite with absolutely diffused MWCNTs was fabricated.Both tensile strength and elongation of the material were obviously increased than the control group(P <0.05).The bending strength had no obviously difference with the control group(P >0.05).The carbon nanotubes and matrices were well-integrated and MWCNTs were distributed evenly into resin matrices.Conclusion:The mechanical properties of base resins strengthened by CVD technique fabricated MWCNTs can be effectively improved.