二维纳米材料在环氧树脂中的润滑性能研究

RESEARCH ON LUBRICATING PERFORMANCE OF TWO-DIMENTIONAL NANOMATERIALS IN EPOXY RESIN

方政钦

11849085

硕士

材料学

孙大陟

2020-05-30

2020-07-01

哈尔滨工业大学

深圳

近年来，随着时代进步发展，具有优良性能的多功能材料越来越受到欢迎。其中环氧树脂材料由于具有高粘结性，高机械性能，稳定交联网络结构等优点，受到了广泛的关注，并且在多种领域里有日益增多的运用和研究。在新时代中，关于能源节约的需求越来越受到重视，因此提升环氧树脂材料的耐磨损的研究也显得越来越重要，并且具有非常高的实际应用价值。本论文主要的研究内容包括使用两种具有非常高潜力和功能性但是却在润滑方面研究尚不系统完善的二维纳米材料氟化石墨烯，阿尔法磷酸氢锆作为环氧树脂复合材料的增强材料，并探究它们对于复合材料润滑性能的影响以及在其中的润滑机理。在对于环氧树脂复合材料进行的动态力学测试和拉伸试验中，发现了二维纳米材料对复合材料具有增强基体材料机械性能的作用。另外在对于环氧树脂复合材料采用干摩擦，去离子水润滑，液体石蜡润滑三种环境下的往复摩擦测试表征中，发现了二维纳米材料在材料摩擦表面具有有效分散载荷力和剪切力的界面润滑作用。氟化石墨烯复合材料耐磨性能在三种测试环境下的最佳浓度分别为 0.25 wt%，0.5 wt%，0.1 wt%，磨损量分别减少了 57.7%，22.0%，17.2%。磷酸氢锆复合材料耐磨性能在三种测试环境下的最佳浓度均为 3 wt%。磨损量分别减少了 20.6%，19.8%，16.3%。在有润滑的测试条件下，二维纳米材料的界面润滑作用将受到抑制。除了二维纳米材料与环氧树脂结合方式之外，氟化石墨烯具有的低表面能的碳氟键和磷酸氢锆具有的高交换能力的亲水羟基基团也是导致复合材料在润滑性能表现上具有差异的原因。

In recent years, with the development of the modern technology, highperformance multifunctional materials attract more and more attentions. Due to the merits of epoxy resin such as high cohesion, high mechanical property, and stable crosslinked network structure, the applications of epoxy resin cover more and more fields. Meanwhile, the requirements of energy conservation impulses the research on the reduction of friction and wear in practical applications. The main research in this thesis is to study two types of novel two-dimensional nanomaterials-fluorographene and alpha-zirconium phosphate, and to systemically study their tribological properties as fillers on epoxy resin composites under various conditions for understanding their lubrication effects and mechanisms. With dynamic mechanical analysis and tensile test characterization, we found that two-dimensional nanomaterials can increase mechanical property of matrix. With reciprocating friction test under air, deionized water and liquid paraffin conditions on epoxy resin composites, we found that two-dimensional nanomaterials can disperse loading force and shear stress in surface through interfacial lubrication. The optimal concentrations of fluorographene composites under three conditions are 0.25 wt%, 0.5 wt%, 0.1 wt% with 57.7%, 22.0%, 17.2% decrease of wear volume, respectively. The optimal concentrations of zirconium phosphate composites under three conditions are all 3 wt% with 20.6%, 19.8%, 16.3% decrease of wear volume, respectively. Under lubricated condition, the interfacial lubrication effect from two-dimensional nanomaterials is restricted. Except for interfacial interactions between two - dimensional nanomaterials with epoxy network structure, C-F bonds with low surface energy in fluorographene and hydroxyl groups with highly ion-exchange capacity in zirconium phosphate are also the reasons causing different lubricative effect of the corresponding composites.

环氧树脂复合材料 氟化石墨烯 阿尔法磷酸氢锆 耐磨损机理

epoxy resin composites fluorographene alpha-zirconium phosphate tribology mechanism

中文

联合培养

南方科技大学

方政钦. 二维纳米材料在环氧树脂中的润滑性能研究[D]. 深圳. 哈尔滨工业大学,2020.