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Synergistic Microgel-Reinforced Hydrogels as High-Performance Lubricants
ACS Macro Letters ( IF 5.1 ) Pub Date : 2020-11-16 , DOI: 10.1021/acsmacrolett.0c00689 Jing Hu 1 , Efren Andablo-Reyes 1 , Siavash Soltanahmadi 1 , Anwesha Sarkar 1
ACS Macro Letters ( IF 5.1 ) Pub Date : 2020-11-16 , DOI: 10.1021/acsmacrolett.0c00689 Jing Hu 1 , Efren Andablo-Reyes 1 , Siavash Soltanahmadi 1 , Anwesha Sarkar 1
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The ability to create a superlubricious aqueous lubricant is important for various biological and technological applications. Here, a nonlipid biolubricant with strikingly low friction coefficients is fabricated (patented) by reinforcing a fluid-like hydrogel composed of biopolymeric nanofibrils with proteinaceous microgels, which synergistically provide superlubricity on elastomeric surfaces in comparison to any of the sole components. This two-component lubricant composed of positively charged lactoferrin microgels and negatively charged κ-carrageenan hydrogels is capable of exceeding the high lubricating performance of real human saliva in tribo tests using both smooth and textured surfaces, latter mimicking the human tongue’s wettability, topography, and compliance. The favorable electrostatic attraction between mutually oppositely charged microgels and the hydrogel reinforces the mechanical properties of the hydrogel, allowing friction reduction by combining the benefits of both viscous and hydration lubrication. The superlubricity of these microgel-reinforced hydrogels offers a unique prospect for the fabrication of biocompatible aqueous lubricants for dry-mouth therapy and/or designing of nonobesogenic nutritional technologies.
中文翻译：
协同微凝胶增强水凝胶作为高性能润滑剂
产生超润滑性水性润滑剂的能力对于各种生物学和技术应用都很重要。在此，通过用蛋白质微凝胶增强由生物聚合纳米纤维组成的流体状水凝胶和蛋白质微凝胶，来制造（专利）摩擦系数极低的非脂质生物润滑剂，与任何单一成分相比，该凝胶在弹性体表面上均具有超润滑性。由带正电的乳铁蛋白微凝胶和带负电的κ-角叉菜胶水凝胶组成的这种两种成分的润滑剂在摩擦测试中使用光滑的和有纹理的表面，能够超过真实的人类唾液的高润滑性能，后者模仿了人类舌头的润湿性，形貌和合规性。相互相反电荷的微凝胶和水凝胶之间的良好静电吸引增强了水凝胶的机械性能，通过结合粘性润滑和水化润滑的优点来降低摩擦。这些微凝胶增强的水凝胶的超润滑性为制造用于干口疗法和/或设计非肥胖营养技术的生物相容性水性润滑剂提供了独特的前景。
更新日期：2020-12-15
中文翻译：
协同微凝胶增强水凝胶作为高性能润滑剂
产生超润滑性水性润滑剂的能力对于各种生物学和技术应用都很重要。在此，通过用蛋白质微凝胶增强由生物聚合纳米纤维组成的流体状水凝胶和蛋白质微凝胶，来制造（专利）摩擦系数极低的非脂质生物润滑剂，与任何单一成分相比，该凝胶在弹性体表面上均具有超润滑性。由带正电的乳铁蛋白微凝胶和带负电的κ-角叉菜胶水凝胶组成的这种两种成分的润滑剂在摩擦测试中使用光滑的和有纹理的表面，能够超过真实的人类唾液的高润滑性能，后者模仿了人类舌头的润湿性，形貌和合规性。相互相反电荷的微凝胶和水凝胶之间的良好静电吸引增强了水凝胶的机械性能，通过结合粘性润滑和水化润滑的优点来降低摩擦。这些微凝胶增强的水凝胶的超润滑性为制造用于干口疗法和/或设计非肥胖营养技术的生物相容性水性润滑剂提供了独特的前景。
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