Layered Hydrogel with Controllable Surface Dissociation for Durable Lubrication,Chemistry of Materials

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Layered Hydrogel with Controllable Surface Dissociation for Durable Lubrication
Chemistry of Materials ( IF 7.2 ) Pub Date : 2020-08-31 , DOI: 10.1021/acs.chemmater.0c02450
Minghai Qu _{1,

2} , Hui Liu _{2,

3} , Changyou Yan _{2,

3} , Shuanhong Ma ₂ , Meirong Cai ₂ , Zhengfeng Ma ₂ , Feng Zhou ₂

Affiliation

Developing bioinspired hydrogel materials with extraordinary lubrication, load-bearing, and antiwear property is necessary for durable lubricious implants or devices. Despite the extensive research focus on lubrication of hydrogel materials, achieving a balance between lubrication and load-bearing for the current system is commonly difficult because of their poor mechanical property. Herein, a cartilage-inspired layered hydrogel material composed of a soft and porous top layer and a robust bottom layer is easily prepared by employing an alkali-induced network dissociation strategy. The thickness of the top soft layer increases with extending the alkali treatment time, along with differential surface and cross-sectional morphologies and mechanical property. The top soft and porous layer ensures that the surface shows extremely low friction (coefficient of friction (COF) ∼ 0.009, 3 N; COF ∼ 0.035, 20 N) against a hard steel ball contact pair, while the bottom layer acts as an excellent load-bearing function. Therefore, the layered hydrogels can achieve extraordinary wear resistance features, resulting from a combination of surface lubrication and bottom load-bearing. It is demonstrated that the method can be used to develop a layered hydrogel lubrication catheter, for which both of its inner and outer surfaces exhibit a slippery feature. The extraordinary lubricious performance of the layered hydrogels implies their potential application in the field of tissue engineering and medical devices.

中文翻译：

具有可控表面解离性的分层水凝胶，可持久润滑

开发具有持久润滑，承重和抗磨性能的生物启发水凝胶材料对于耐用的润滑性植入物或设备而言是必要的。尽管对水凝胶材料的润滑进行了广泛的研究，但是由于其较差的机械性能，通常难以在当前系统的润滑和承重之间达到平衡。在此，通过采用碱诱导的网络解离策略容易地制备由柔软且多孔的顶层和坚固的底层组成的软骨启发的层状水凝胶材料。顶部软层的厚度随着碱处理时间的延长而增加，以及不同的表面和横截面形态以及机械性能。顶部的柔软多孔层确保表面对硬钢球接触对的摩擦力极低（摩擦系数（COF）〜0.009，3 N; COF〜0.035，20 N），而底层则表现出优异的摩擦力承重功能。因此，由于表面润滑和底部承重的结合，层状水凝胶可以获得非凡的耐磨性。证明了该方法可用于开发层状水凝胶润滑导管，该导管的内外表面均具有光滑的特征。层状水凝胶的非凡润滑性能表明它们在组织工程和医疗设备领域的潜在应用。而底层则具有出色的承重功能。因此，由于表面润滑和底部承重的结合，层状水凝胶可以获得非凡的耐磨性。证明了该方法可用于开发层状水凝胶润滑导管，该导管的内外表面均具有光滑的特征。层状水凝胶的非凡润滑性能表明它们在组织工程和医疗设备领域的潜在应用。而底层则具有出色的承重功能。因此，由于表面润滑和底部承重的结合，层状水凝胶可以获得非凡的耐磨性。证明了该方法可用于开发层状水凝胶润滑导管，该导管的内外表面均具有光滑的特征。层状水凝胶的非凡润滑性能表明它们在组织工程和医疗设备领域的潜在应用。证明了该方法可用于开发层状水凝胶润滑导管，该导管的内外表面均具有光滑的特征。层状水凝胶的非凡润滑性能表明它们在组织工程和医疗设备领域的潜在应用。证明了该方法可用于开发层状水凝胶润滑导管，该导管的内外表面均具有光滑的特征。层状水凝胶的非凡润滑性能表明它们在组织工程和医疗设备领域的潜在应用。

更新日期：2020-09-22

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