Natural articular cartilages exhibit extraordinary lubricating properties and excellent load-bearing capacity based on their penetrated surface lubricated biomacromolecules gradient-oriented hierarchical structure. Hydrogels are considered as the most promising cartilage replacement materials due to flexibility, good biocompatibility, low friction coefficient. However, construction of high-strength, low-friction hydrogels mimic is still a great challenge. Here, inspired by structure...

Abstract The polyetheretherketone (PEEK)-highly cross-linked polyethylene (XLPE), all-polymer knee prosthesis has excellent prospects for replacing the traditional metal/ceramic-polyethylene joint prosthesis, improving service life of and quality patients’ life. long-term wear mechanism PEEK-XLPE is comprehensively evaluated from amount, morphology, debris compared to that CoCrMo-XLPE prosthesis. After 5 million cycles in vitro wear, loss XLPE (30.9±3.2 mg) lower than (32.1±3.1 mg). Compared...

Bone and cartilage are highly organized tissues with gradient layered, which makes have good lubrication bearing capacity. Inspired by the structure of natural articular cartilage, PVA–HA PVA–HA–PAA composite hydrogels were selected to prepare a hierarchical bionic material physical bonding. The lower hydrogel upper provide excellent loading-bearing ability materials, respectively. Furthermore, cartilage–bone was constructed grafting multilayer onto UHMWPE after oxidation esterification...

Abstract Inspired by the cartilage-bone structure in natural joints, soft-hard integrated materials have received extensive attention, which are most promising candidates for artificial joints due to their combination of excellent load-bearing properties and lubricating properties. The latest progress showed that hydrogel titanium alloy can realize a bionic joint lubrication system on surface alloy. However, obtaining tough interface between (soft wet) substrate (hard dry) is still great...

The mechanical properties of PPG-4 hydrogel were comparable to natural cartilage. friction coefficient is low as 0.039. could be widely used in tissue engineering such cartilage replacement.

The combination of fluid lubricants and textured amorphous carbon (a-C) can provide an ultralow friction state, which improve the reliability service life dynamic machinery. However, coupling effects contact pressure oil content on friction-reducing efficiency is still lack study, corresponding mechanism also not fully understood, cannot be achieved by experiment due to limitation in situ characterization. In this using reactive molecular dynamics simulation, insight into evolution...

Poly(ether ether ketone) (PEEK) has excellent biological and mechanical properties good fatigue resistance. It is expected to replace metal as an artificial joint prosthesis material. But its poor wear resistance antibacterial limit application. In this paper, ZnO was synthesized on the surface of acidified short carbon fiber (SCF) by in situ synthesis combined with hydrothermal method. The nano-ZnO-modified SCF powder used a reinforcement filler. melt-blended PEEK then injection-molded...

Hydrogels with sustained lubrication, high load-bearing capacity, and wear resistance are essential for applications in soft tissue replacements material devices. Traditional tough or lubricious hydrogels fail to balance the lubrication functions. Inspired by gradient-ordered multilayer structures of natural tissues (such as cartilage ligaments), a tough, smooth, low-permeability, low-friction anisotropic layered electrospun fiber membrane-reinforced hydrogel was developed using...

The complex movement of artificial joints is closely related to the wear mechanism prosthesis material, especially for polymer prosthesis, which sensitive motion paths. In this paper, “soft-soft” all-polymer XLPE/PEEK are selected study influence paths on friction and performance. Based periodic characteristics coefficient morphology, paper reveals XLPE/peek under multi-directional path, obtains quantitative relationship between aspect ratios “∞”-shape great significance reveal analyze...

Artificial joint replacement is the most effective way to treat osteoarthritis. However, these artificial joints are too stiff with high interfacial contact stress and poor surface lubrication, resulting in shielding severe wear tear lead an extremely failure rate. At present, hydrogels considered promising substitute for prostheses owing their good biocompatibility, adjustable mechanical properties, excellent flexibility. Nevertheless, a traditional single-layer hydrogel has bearing...

The friction lining is a critical component of the hoist, serving as driving force for lifting through its interaction with wire rope. Monitoring state between rope and crucial it directly impacts capacity, work efficiency, overall safety. By employing finite element simulation creating surface microstructures on triboelectric nanogenerators (TENG) using ultraviolet laser, this study demonstrats that microstructure can improve voltage output. Compared TENG without morphology, increased by...

Hydrogels with high water content, excellent permeability and biocompatibility, are widely used in the biomedical field. In this study, a kind of ordered structure reinforced HA composite hydrogel strength, low friction fatigue resistance was developed through molecular network design, combined temperature field induced orientation nano reinforcement technology. The has honeycomb vertically orientation, showing higher regularity, greater freedom cross-linking points, enhanced flexibility...

Aseptic loosening caused by the wear and tear of artificial joint prosthesis after implantation is one main causes failure. Therefore, it important to investigate debris generated due when developing new materials. related size, number, morphology debris, this study proposed separation extraction mixed with different density ratios joints centrifugation characteristics rates. The results showed that multiple centrifugations separate were able reintroduce on wall centrifuge tube into solution...

Fretting crevice corrosion of total hip joints has been associated with joint replacement failure. However, researchers have not considered the interaction between fretting and corrosion. In this study, an artificial system that could perform in center was designed, fretting-initiated (FICC) under different widths, along effect on corrosion, were studied. The results showed FICC more obvious a smaller crevice, pitting initiated at shear band, resulting Furthermore, pre-treatment...

The roller is an important part of the belt conveyor used in coal transportation. Due to harsh environment mines, rollers are a state high load and friction for long time, which causes wear failure has serious impact on reliability safety equipment. In order prepare material with excellent bearing performance performance, CF/PUE composites were prepared by pouring method polyurethane as matrix carbon fiber reinforcement. low surface activity unmodified fibers poor bonding matrix, MoS2 was...