水环境下纳米SiO2增强超高分子量聚乙烯防滑性能的影响研究

超高分子聚乙烯材料因具有优良的耐磨性、耐蚀性和轻质性而逐渐应用在船舶甲板表面. 船舶甲板的湿滑、海浪冲击和颠簸环境严重影响甲板仪器设备和人员的平衡性，进而挑战其可靠性和船员人身安全. 为了提升超高分子聚乙烯(UHMWPE)材料在湿滑环境下表面防滑性能，采用具有高硬度和优异増摩性能的纳米二氧化硅(SiO2)对其进行共混改性，探究不同体积分数的SiO2在摩擦磨损试验过程中对UHMWPE摩擦系数的影响规律. 试验结果表明：一方面，纳米SiO2在一定程度上削弱了水膜在纳米SiO2改性UHMWPE复合材料的浸润能力和吸附性，使其从亲水性逐步向疏水性转变，改善湿滑环境下的防滑效果；另一方面，纳米SiO2颗粒坚硬且不易变形的特性让其逐渐在摩擦磨损过程中显露出来，在外界载荷的作用下与陶瓷球之间形成啮合摩擦现象，导致UHMWPE的摩擦系数呈现上升趋势，最终表现出与干摩擦相近的摩擦系数，达到防滑需求. 研究结果对设计和制造一种能在湿滑环境下具有优异防滑性能的船舶甲板高分子复合材料提供理论支持.

Ultra-high molecular weight polyethylene (UHMWPE) has been gradually applied to ship deck surfaces due to its excellent wear resistance, corrosion resistance and light weight. The slippery conditions, wave impact and bumpy environment on ship decks severely impair the balance of deck instruments, equipment and personnel, thereby posing challenges to their reliability and the personal safety of crew members. To improve the surface anti-slip performance of ultra-high molecular weight polyethylene (UHMWPE) in wet and slippery environments, nano-silica (SiO₂) with high hardness and excellent friction-enhancing properties was used for blending modification, and the influence law of SiO₂ with different volume fractions on the friction coefficient of UHMWPE during friction and wear tests was investigated. The test results show that: on one hand, nano-SiO₂ weakens the wettability and adsorbability of the water film on the SiO₂-modified UHMWPE composite to a certain extent, gradually changing its surface from hydrophilic to hydrophobic, which improves the anti-slip effect in wet and slippery environments; on the other hand, the hard and non-deformable nature of nano-SiO₂ particles allows them to gradually emerge during the friction and wear process, forming meshing friction with the ceramic ball under external loads, leading to an upward trend in the friction coefficient of UHMWPE. Eventually, the friction coefficient is close to that of dry friction, meeting the anti-slip requirements. The research results provide theoretical support for the design and manufacture of polymer composite materials for ship decks with excellent anti-slip performance in wet and slippery environments.

搜集汇总

背景与挑战

背景概述

该数据集聚焦于水环境下纳米SiO2对超高分子量聚乙烯（UHMWPE）防滑性能的增强研究，通过共混改性实验探究纳米SiO2体积分数对摩擦系数的影响规律。研究发现，纳米SiO2能改善材料的疏水性并形成啮合摩擦，使摩擦系数上升至接近干摩擦水平，从而提升湿滑环境下的防滑效果，为船舶甲板高分子复合材料设计提供理论依据。