Fe^(3+)/g-C_(3)N_(4)改性环氧树脂复合材料的制备及性能

Preparation and Performance of Fe^(3+)/g-C_(3)N_(4) Modified Epoxy Nanocomposites

为改善环氧树脂的力学性能,将Fe^(3+)修饰的氮化碳(Fe^(3+)/g-C_(3)N_(4))引入到吲哚基环氧树脂网络中,以FeCl 3和三聚氰胺为前驱体制备了Fe^(3+)/g-C_(3)N_(4)。利用X射线衍射仪、红外光谱仪、X射线光电子能谱仪、透射电镜、扫描电镜对材料的形貌和结构进行了表征,通过拉伸试验测试了环氧树脂复合材料的机械性能,同时对复合材料的光催化性能进行了测试。研究结果表明:实验成功制备了Fe^(3+)/g-C_(3)N_(4)改性环氧树脂复合材料;纯环氧树脂(EPI0)的拉伸强度和断裂伸长率分别为64 MPa和6.0%,与EPI0相比,Fe^(3+)/g-C_(3)N_(4)掺杂质量分数为0.15%环氧树脂复合材料(EPI20-FeCN0.15)的拉伸强度和断裂伸长率分别提高了42%和35%;将环氧树脂复合材料涂覆在聚丙烯船舶模型的外表面,在可见光条件下8 h内环氧树脂复合材料完全降解了罗丹明B,因此可将其作为可循环利用的光催化平台,降解有机污染物罗丹明B。

In order to improve the mechanical properties of epoxy resin,this paper introduced Fe^(3+)modified carbon nitride(Fe^(3+)/g-C_(3)N_(4))into indole-based epoxy resin matrix.Fe^(3+)/g-C_(3)N_(4) was prepared by using FeCl 3 and melamine as precursors.The structure and morphology of prepared Fe^(3+)/g-C_(3)N_(4) were characterized by X-ray diffraction,Fourier transform infrared spectroscopy,X-ray photoelectron spectroscopy,transmission electron microscope.The mechanical performance of as-prepared epoxy composites was characterized by scanning electron microscope and tensile test.The results indicate that the tensile strength and elongation at break of pure epoxy resin(EPI0)were 64 MPa and 6.0%respectively;compared with EPI0,the tensile strength and elongation at break of EPI20-FeCN0.15 doped with 0.15%Fe^(3+)/g-C_(3)N_(4) increased by 42%and 35%respectively.In addition,epoxy nanocomposites were coated onto the outer surface of polypropylene ship model,and the photocatalytic performance of the epoxy nanocomposites was studied through the degradation of rhodamine B under visible light.It was found that epoxy resin composites completely degraded rhodamine B within 8 hours,which can serve as a recyclable photocatalytic platform to decompose organic contaminants rhodamine B.