柴辉,王新华,孙涛,程一启,杨林,齐勇胜.Ti–CNF增强环氧树脂复合涂层的制备及性能研究[J].表面技术,2022,51(5):166-176.
CHAI Hui,WANG Xin-hua,SUN Tao,CHENG Yi-qi,YANG Lin,QI Yong-sheng.Preparation and Performance Study of Ti-CNF Reinforced Epoxy Resin Composite Coating[J].Surface Technology,2022,51(5):166-176
Ti–CNF增强环氧树脂复合涂层的制备及性能研究
Preparation and Performance Study of Ti-CNF Reinforced Epoxy Resin Composite Coating
  
DOI:10.16490/j.cnki.issn.1001-3660.2022.05.018
中文关键词:  环氧树脂  复合涂层  硬度和附着力  断裂韧度  摩擦学性能  耐酸碱腐蚀
英文关键词:epoxy resin  composite coating  hardness and adhesion  fracture toughness  tribological performance  seawater corrosion resistance
基金项目:
作者单位
柴辉 北京工业大学 材料与制造学部智能机械研究院,北京 100124 
王新华 北京工业大学 材料与制造学部智能机械研究院,北京 100124 
孙涛 北京工业大学 材料与制造学部智能机械研究院,北京 100124 
程一启 北京工业大学 材料与制造学部智能机械研究院,北京 100124 
杨林 北京工业大学 材料与制造学部智能机械研究院,北京 100124 
齐勇胜 北京工业大学 材料与制造学部智能机械研究院,北京 100124 
AuthorInstitution
CHAI Hui Institute of Intelligent Machinery, Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing 100124, China 
WANG Xin-hua Institute of Intelligent Machinery, Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing 100124, China 
SUN Tao Institute of Intelligent Machinery, Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing 100124, China 
CHENG Yi-qi Institute of Intelligent Machinery, Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing 100124, China 
YANG Lin Institute of Intelligent Machinery, Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing 100124, China 
QI Yong-sheng Institute of Intelligent Machinery, Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing 100124, China 
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中文摘要:
      目的 提高海水轴向柱塞泵摩擦副的耐磨和耐蚀性能,以钛纳米颗粒(Ti)和碳纳米纤维(CNF)为原料,设计并制备Ti–CNF增强环氧树脂复合涂层。方法 借助红外光谱仪分析纯树脂和Ti–CNF增强环氧树脂复合材料中官能团的变化,通过硬度、附着力、断裂韧度、摩擦磨损和耐酸碱溶液浸渍测试,分别评价不同含量的Ti–CNF增强环氧树脂复合涂层的硬度、附着力、断裂韧度、摩擦学性能和耐腐蚀性能,并利用扫描电子显微镜揭示复合涂层的断裂、磨损和腐蚀机理。结果 Ti–CNF混合填料与树脂基体的结合方式为物理黏合;当添加填料的质量分数为6%时,复合材料的增强效果最佳,硬度、附着力、断裂韧度、摩擦因数和磨损率分别为668HL、5.8 MPa、0.937 MPa.m1/2、0.354、7.52×1013 m3/(N.m),耐酸碱溶液浸渍测试后未观察到明显的锈点。当添加填料的质量分数增加到8%时,复合涂层的性能逐渐下降,耐酸碱溶液浸渍测试后观察到明显的锈点。结论 添加适量的Ti–CNF混合填料能够有效提高环氧树脂的硬度、断裂韧度、摩擦学性能和耐酸碱溶液腐蚀性能;Ti纳米颗粒与氧气产生化学反应,有效抑制了微裂纹的持续扩展;CNF填料由于尺寸上的差异,限制了周围树脂基体的运动,延长了酸碱溶液在树脂中的扩散路径,2种填料相互作用,在很大程度上提高了复合涂层的性能。
英文摘要:
      To improve the wear resistance and corrosion resistance of the friction pair of seawater axial piston pump, Ti-CNF reinforced epoxy resin composite coating is designed and prepared with titanium nanoparticles (Ti) and carbon nanofibers (CNF) as raw materials.To improve the resistance of wear and corrosion for the frictional pairs of seawater hydraulic pumps, a combination of inorganic nanoparticles and metal nanoparticles is proposed. Ti-CNF reinforced epoxy resin composite coatings with different filler contents are prepared by mixing the two nanomaterials in equal amounts based on the obstructing effect of carbon nanofibers (CNF) of different lengths on the diffusion path of seawater, as well as the phenonmen that the protective effect of titanium nanoparticles (Ti) can form a dense oxide film by rapid passivation with oxygen at room temperature, and the volume expansion of titanium nanoparticles during their own oxidation can achieve the filling effect of microcracks in the composite coating. The evolution of functional groups in pure resin and Ti-CNF reinforced epoxy resin composites are analyzed with employing the infrared spectroscopy. The hardness, adhesion, fracture toughness, tribological characteristics and corrosion resistance of some kinds of epoxy resin composite coatings reinforced with variant Ti-CNF contents are evaluated by experiments. The fracture, wear and corrosion mechanisms of composite coatings are revealed using scanning electron microscopy. The bonding of Ti-CNF hybrid filler with the resin matrix is a process of physical reaction. Pure resin composites have great brittleness. And the hardness, adhesion, fracture toughness, friction coefficient and wear rate at this point can respectively reach 374HL, 3.5 MPa, 0.738 MPa.m1/2, 0.487 and 12.23×10−13 m3/(N.m). After immersion test with acid and alkali resistant solution, the composite coating appears obvious peeling and cracking. With the increase of Ti-CNF nanohybrid filler content, the hardness, adhesion, fracture toughness, friction wear and acid and alkali solution impregnation resistance of the composites showed a trend of increasing and then decreasing. The hardness, adhesion, fracture toughness and friction wear properties of the composites are substantially improved when the filler additionsare 2wt.% and 4wt.% compared to the pure resin. However, obvious bubbles and pitting are still observed on the surface of the composite coating after the acid and alkali resistant solution impregnation test. The bonding mode between Ti-CNF mixed filler and resin matrix is physical bonding. The optimum effects of reinforcement for composite can be obtained when the additive filler is 6wt.%. And the hardness, adhesion, fracture toughness, friction coefficient and wear rate at this point can respectively reach 668HL, 5.8 MPa, 0.937 MPa.m1/2, 0.354 and 7.52×10−13 m3/(N.m). No obvious rust spots are observed after immersion test in acid and alkali resistant solutionAlso, the rust spots are unconspicuously observed after seawater dipping corrosion test. However, the performance of the composite coating gradually decreases with the additive filler increased to 8wt.%. And the hardness, adhesion, fracture toughness, friction coefficient and wear rate at this point can respectively reach 643HL, 4.4 MPa, 0.84 MPa.m1/2, 0.427 and 8.86×10−13 m3/(N.m). Also, the rust spots are obviously observed by the seawater dipping corrosion test. The obtained results show that the suitable content of Ti-CNF hybrid filler can effectively enhance the hardness, fracture toughness, tribological performance and corrosion resistance of the composite epoxy resin. The chemical reaction of Ti nanoparticles with oxygen can effectively inhibit the continued growth of micro-cracks. The surrounding resin matrix motion and extends diffusion path of the acid-base solution within the resin is restrained due to the variation of the CNF filler in dimension. Thus, the performance of the composite coating can be improved greatly after the combination of the two fillers.
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