氧化石墨烯改性脲醛树脂复合材料研制及力学性能研究

Preparation and Mechanical Properties of Urea-Formaldehyde Resin Composites Modified by Graphene Oxide

以脲醛树脂为基体,氧化石墨烯为活性增强相,首先合成氧化石墨烯改性脲醛树脂复合材料(GO-UF),然后分析了不同因素(固化剂含量、氧化石墨烯含量)对复合材料力学性能(抗冲击强度、抗拉伸强度、表面硬度)影响,最后采用傅里叶变换红外光谱(FTIR)、X射线衍射(XRD)等多种表征分析手段对复合材料进行组成分析。研究结果表明:(1)加入氧化石墨烯后,复合材料的冲击强度,拉伸强度和表面强度得到了改善。(2)通过FT-IR和XRD表征分析氧化石墨烯和脲醛树脂产生了较强的相互作用。(3)根据TGA表征分析结果发现,氧化石墨改性脉醛树脂与其相比热稳定性能提高。

The urea-formaldehyde resin was used as the matrix and graphene oxide was used as the active reinforcer. Urea-formaldehyde （UF） composites modified by graphene oxide （GO-UF） were synthesized, and then the effects of different factors （curingagent content, graphene oxide content） on the mechanical properties （impact strength, tensile strength, surface hardness） of the com-posites were studied. Finally, Fourier transform infrared spectroscopy （FTIR） and X-ray diffraction （XRD） were used to analyze thecomposition of the composites. The results showed that： （1） the impact strength, tensile strength and surface strength of the compositeswere improved after the addition of graphene oxide; （2） the interaction between graphene oxide and urea-formaldehyde resin was ana-lyzed by FT-IR and XRD; and （3） according to the results of TGA characterization, it was found that the thermal stability of graphiteoxide modified veinaldehyde resin was higher than that of graphite oxide modified veinaldehyde resin.