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摘要
为提高填料与水性聚氨酯(WPU)之间的相容性和增加涂层防腐和抗静电性能,采用聚醚胺对氧化石墨烯(GO)边缘的羧基进行化学改性制备改性氧化石墨烯(AGO),并进一步制备了聚苯胺/改性氧化石墨烯复合材料(PANI/AGO)用于涂层制备。采用傅里叶变换红外光谱(FT-IR)、X射线衍射(XRD)、扫描电子显微镜(SEM)、热重分析(TG)法表征复合材料结构,并分析了涂层的力学性能、抗静电性能和防腐性能。结果表明:当PANI/AGO加入质量为涂料的2%时,表面电阻为3.46×108Ω,附着力0级,铅笔硬度5H,腐蚀电位为-0.446mV,腐蚀电流为8.293×10-9A/cm2。与单一填料相比,PANI/AGO能在更低的添加量下表现出显著的性能优势。添加仅2% PANI/AGO的涂层在物理性能和防腐性能方面均显著优于传统单一填料,此外,PANI/AGO的引入有效改善了纳米填料与WPU之间的相容性,从而增强其力学性能和防腐性能。
Abstract
To enhance the compatibility between fillers and waterborne polyurethane (WPU) and to improve the anti-corrosion and antistatic properties of the coating,polyetheramine was used to chemically modify the carboxyl groups on the edges of graphene oxide (GO) to prepare modified graphene oxide (AGO).Further,a modified graphene oxide/polyaniline (PANI/AGO) composite was obtained for coating preparation.The structure of the composite was characterized using Fourier transform infrared spectroscopy (FT-IR),X-ray diffraction (XRD),scanning electron microscopy (SEM),and thermogravimetric analysis (TGA).The mechanical properties,antistatic properties,and anti-corrosion performance of the coating were analyzed.The results showed that when the PANI/AGO composite was added at 2wt% of the coating,the surface resistance was 3.46×108Ω,the adhesion was grade 0,the pencil hardness was 5H,the corrosion potential was -0.446mV,and the corrosion current was 8.293×10-9A/cm2.Compared to single fillers,the PANI/AGO composite demonstrated significant performance advantages at lower addition levels.The coating with only 2wt% PANI/AGO exhibited superior physical and anti-corrosion properties compared to traditional single fillers.Additionally,the introduction of PANI/AGO effectively improved the compatibility between the nanofiller and waterborne polyurethane,thereby enhancing its mechanical properties and anti-corrosion performance.
关键词
水性聚氨酯
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复合材料
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导电填料
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防腐性能
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抗静电性能
Key words
waterborne polyurethane
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composites
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conductive fillers
/
corrosion resistance
/
antistatic properties
改性氧化石墨烯/聚苯胺复合材料增强水性聚氨酯涂层防腐和抗静电性能研究[J].
化工新型材料, 2026, 54(2): 136-143 DOI:10.19817/j.cnki.issn1006-3536.2026.02.035
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基金资助
国家自然科学基金青年项目(61904130);湖北省重点研发专项项目(2023BAB122)
