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Making Sticky-Slippery Switchable Fluorogels Through Self-Adaptive Bicontinuous Phase Separation
Advanced Materials ( IF 27.4 ) Pub Date : 2024-10-14 , DOI: 10.1002/adma.202411273
Xiaoxia Li, Baohu Wu, Shengtong Sun, Peiyi Wu
Advanced Materials ( IF 27.4 ) Pub Date : 2024-10-14 , DOI: 10.1002/adma.202411273
Xiaoxia Li, Baohu Wu, Shengtong Sun, Peiyi Wu
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Developing gel materials with tunable frictional properties is crucial for applications in soft robotics, anti-fouling, and joint protection. However, achieving reversible switching between extreme sticky and slippery states remains a formidable challenge due to the opposing requirements for energy dissipation on gel surfaces. Herein, a self-adaptive bicontinuous fluorogel is introduced that decouples lubrication and adhesion at varying temperatures. The phase-separated fluorogel comprises a soft fluorinated lubricating phase and a stiff yet thermal-responsive load-bearing phase. At ambient temperature, the fluorogel exhibits a highly slippery surface owing to a low-energy-dissipating lubricating layer, demonstrating an ultralow friction coefficient of 0.004. Upon heating, the fluorogel transitions into a highly dissipating state via hydrogen bond dissociation, concurrently releasing adhesive dangling chains to make the surface highly sticky with an adhesion strength of ≈362 kPa. This approach provides a promising foundation for creating advanced adaptive materials with on-demand self-adhesive and self-lubricating capabilities.
中文翻译:
通过自适应双连续相分离制备粘滑可切换荧光凝胶
开发具有可调摩擦特性的凝胶材料对于软机器人、防污和关节保护的应用至关重要。然而,由于凝胶表面的能量耗散要求相反,在极端粘性和光滑状态之间实现可逆切换仍然是一项艰巨的挑战。在此,引入了一种自适应双连续荧光凝胶,可在不同温度下解耦润滑和粘附。相分离的荧光凝胶包括一个软氟化润滑相和一个刚性但热响应性的承载相。在环境温度下,由于具有低能耗散润滑层,荧光凝胶表面非常光滑,具有 0.004 的超低摩擦系数。加热后,荧光凝胶通过氢键解离转变为高度耗散状态,同时释放胶粘剂悬链,使表面具有高度粘性,粘合强度为 ≈362 kPa。这种方法为创建具有按需自粘和自润滑能力的先进自适应材料奠定了有前途的基础。
更新日期:2024-10-14
中文翻译:
![](https://scdn.x-mol.com/jcss/images/paperTranslation.png)
通过自适应双连续相分离制备粘滑可切换荧光凝胶
开发具有可调摩擦特性的凝胶材料对于软机器人、防污和关节保护的应用至关重要。然而,由于凝胶表面的能量耗散要求相反,在极端粘性和光滑状态之间实现可逆切换仍然是一项艰巨的挑战。在此,引入了一种自适应双连续荧光凝胶,可在不同温度下解耦润滑和粘附。相分离的荧光凝胶包括一个软氟化润滑相和一个刚性但热响应性的承载相。在环境温度下,由于具有低能耗散润滑层,荧光凝胶表面非常光滑,具有 0.004 的超低摩擦系数。加热后,荧光凝胶通过氢键解离转变为高度耗散状态,同时释放胶粘剂悬链,使表面具有高度粘性,粘合强度为 ≈362 kPa。这种方法为创建具有按需自粘和自润滑能力的先进自适应材料奠定了有前途的基础。