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首页> 外文期刊>Tribology International >Synthesis and characterizations of zwitterionic copolymer hydrogels with excellent lubrication behavior
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Synthesis and characterizations of zwitterionic copolymer hydrogels with excellent lubrication behavior

机译：两性离子共聚物水凝胶具有优异的润滑行为的合成与特征

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摘要

Various studies on hydrogel applications as cartilage substitutes and artificial joints have been previously conducted. In this study, a copolymer hydrogel comprising zwitterionic sulfobetaine methacrylate (SBMA) and 2-methacryloyloxyethyl phosphorylcholine (MPC) polymers is synthesized in an aqueous system via free-radical polymerization. A P(MPC-co-SBMA) copolymer hydrogel network is formed via the additional polymerization of the alkane carbon-carbon double bond from the combination of MPC and SBMA polymer chains using ethylene glycol dimethacrylate (EGDMA) as the crosslinker. Introduction of MPC in the PSBMA hydrogel under water lubrication improved the compressive stress by almost double and considerably lowered the coefficient of friction (COF) to approximately 0.011. This phenomenon was attributed to the fact that MPC could intertwine with SBMA to increase the crosslink density of the hydrogel and preferentially adhere to the water to reduce the adhesion of the contact between hydrogels, leading to an intertwined copolymer network structure with excellent load-bearing capacity and superior hydration lubrication capability. This study might provide potentially useful information relating to cartilage replacement applications requiring high mechanical strength and excellent friction behavior.
机译：先前已经进行了对软骨替代物和人工关节作为软骨替代品的各种研究。在该研究中，通过自由基聚合在水性体系中在水性体系中合成包含两性离子磺基甲酸甲酯（SBMA）和2-甲基丙烯酰氧基乙基磷素（MPC）聚合物的共聚物水凝胶。通过使用乙二醇二甲基丙烯酸乙酯（EGDMA）作为交联剂，通过使用乙二醇二甲基丙烯酸乙二醇（EGDMA）来形成P（MPC-Co-SBMA）共聚物水凝胶网络。在水润滑下在PSBMA水凝胶中引入MPC在水润滑下改善了压缩应力几乎双倍并且显着降低了摩擦系数（COF）至约0.011。这种现象归因于MPC可以与SBMS交织在一起以增加水凝胶的交联密度并优先粘附到水中以减少水凝胶之间接触的粘附，导致具有优异承载能力的交织共聚物网络结构和卓越的水合润滑能力。该研究可以提供与需要高机械强度和优异摩擦行为的软骨替换应用有关的潜在有用的信息。

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