Several soft tissues residing in the living body have excellent hydration lubrication properties and can provide effective protection during relative motion. In order to apply this advantage of soft matters in practical applications and try to avoid its disadvantage, such as swelling and weakening in water, a design strategy of a soft/hard double network (DN) hydrogel microsphere modified ultrahigh molecular weight polyethylene (UHMWPE) composite is proposed in this study. A series of microspheres of urea-formaldehyde (UF), polyacrylamide (PAAm) hydrogel, UF/PAAm double network, and their composites were prepared. The mechanical properties, swelling, wettability, friction properties, and the lubrication mechanisms of the composites were investigated. The results show that DN microspheres can have an excellent stability and provide hydration lubrication. The performance of 75 DN-1 composite was superior to others. This finding will provide a novel strategy for the development of water-lubricated materials and have wide application in engineering fields.

居住在生物体内的几种软组织具有出色的水合作用润滑性能，可以在相对运动期间提供有效的保护。为了将软物质的这种优势应用到实际应用中，并设法避免其诸如在水中溶胀和变弱的缺点，一种软/硬双网络（DN）水凝胶微球改性超高分子量聚乙烯（UHMWPE）的设计策略本研究提出了复合材料。制备了一系列脲醛（UF），聚丙烯酰胺（PAAm）水凝胶，UF / PAAm双网络微球及其复合材料。研究了复合材料的机械性能，溶胀性，润湿性，摩擦性能以及润滑机理。结果表明，DN微球可以具有出色的稳定性并提供水合润滑。75 DN-1复合材料的性能优于其他材料。这一发现将为开发水润滑材料提供一种新颖的策略，并在工程领域得到广泛的应用。