The low-dimensional materials tribology group led by Yan Xingbin, a researcher at the State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, has made new progress in the tribological study of graphene oxide ultrahigh molecular weight polyethylene (UHMWPE) composites. Related results were published in the international journal Tribology News. Ultra-high molecular weight polyethylene is used as a material for artificial articular cartilage (joint articular cartilage), and is combined with a metal or ceramic artificial joint head to form an artificial joint commonly used in clinical practice. However, clinical practice has shown that artificial joints have an effective working life of 10 to 15 years. Polyethylene abrasions generated during long-term use can cause bone inflammation, aseptic loosening and prosthesis loss, which requires replacement of new artificial joints. The cost of surgery and failure rate of replacing the artificial joint again is much higher than the first replacement, resulting in economic loss and damage to the patient's body. In order to enhance the wear resistance of medical ultra-high molecular weight polyethylene, Yan Xingbin et al. used nano-particle reinforced composite technology to make full use of the outstanding characteristics of high-strength, high-modulus, high-hardness and low-friction coefficient of the new two-dimensional nano-material graphene. The friction and wear properties of graphene/UHMWPE composites were improved. At the same time, they studied the evolution of composition, structure and properties of graphene reinforcements in the friction process of polymer matrix composites, as well as the lubrication mechanism and chemical and physical changes of graphene. .
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The present invention provides a multifunctional pull faucet, comprising: a faucet body, a drawing part is provided at the water outlet port thereof, and the drawing part is connected to a main channel, wherein at least three are provided in the faucet body A branch channel, and the three branch channels are all connected to the main channel. A multifunctional pull faucet provided by the present invention, wherein the hot water channel, the cold water channel and the water purification channel (pure water channel) are all connected to the main channel , And the main channel is connected with the drawing part on the main body of the faucet, so that the drawing part can obtain the water quality (hot water, cold water, purified water or pure water) required by different users, thereby improving the user experience, and , By integrating the hot water channel, cold water channel and pure water channel (pure water channel) into the main channel, the internal structure of the faucet is simplified, and the production cost of the faucet is reduced.
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