Modulus adaptive lubricating prototype inspired by instant muscle hardening mechanism of catfish skin

Zhang, Yunlei; Zhao, Wei; Ma, Shuanhong; Liu, Hui; Wang, Xingwei; Zhao, Xueyan; Yu, Bo; Zhou, Feng

doi:10.1038/s41467-022-28038-9

Cited by 72 publications

(53 citation statements)

References 53 publications

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“…The biomacromolecules tethered to the cartilage surface can form a polymer brush border, which plays a pivotal role in friction reduction. In order to mimic that unique polymer brush structure, Zhou's group proposed an effective method called sSI-ATRP (subsurface initiated atom transfer radical polymerisation) to graft hydrophilic polymer brushes onto the surface of hydrogels [143][144][145][146][147]. In 2020, Rong et al used the sSI-ATRP method to form a layer of thick hydrophilic polyelectrolyte brushes into the subsurface of a stiff hydrogel (Figure 9a) [148].…”

Section: Surface Modification Of Hydrogelmentioning

confidence: 99%

Recent progress of bioinspired cartilage hydrogel lubrication materials

Zhao

Zhang

et al. 2022

Biosurface and Biotribology

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Hydrogels have been considered as potential candidates for cartilage replacement due to their high-water content, extreme network hydration, excellent biocompatibility and tunable mechanical properties. Currently, the development of high-performance cartilageinspired hydrogel lubrication materials has become a hot topic in the field of biomedical materials. This review focusses on the recent development of cartilage-inspired highstrength hydrogels from the viewpoints of bionic surface/interface and biotribology. Specifically, the composition structure and extraordinary lubrication mechanism of the natural articular cartilage are overviewed first. Subsequently, some of the novel biomimetic design strategies for preparing high strength cartilage hydrogels with various network structures are summarised in detail, while systematic evaluation of lubrication properties and mechanisms are discussed. Furthermore, new surface modification means for improving the lubrication feature of high strength cartilage hydrogel materials are presented. In addition, in order to demonstrate the application potential of cartilage hydrogels in clinical, several bonding methods to decorate hydrogels onto surfaces of natural bone tissues or artificial joint materials are introduced. Finally, current challenges and future research directions are discussed for cartilage-inspired hydrogel lubrication materials. | INTRODUCTIONArticular cartilage in the human body is a layer of soft connective tissue covering the surface of bones, which exhibits excellent superlubricity and wear resistance properties during daily activities. Extremely low friction coefficients (0.001-0.03) can be obtained under variable physiological joint pressure (3-18 MPa) [1, 2], and the superior lubrication properties of the articular cartilage are attributed to its surface chemical composition and specific structure [3][4][5]. Despite its excellent load-bearing and lubricating properties, cartilage may become damaged due to ageing, trauma or disease, which causes a series of joint diseases, such as osteoarthritis, rheumatoid arthritis and so on [6][7][8][9]. Since there are no blood vessels or nerves inside the cartilage tissue, it is difficult to repair itself after damage. At present, the common methods for cartilage tissue repair mainly include cartilage transplantation [10,11], joint fusion [12], and chondrocyte transplantation [13,14]. However, the mechanical properties of cartilage repaired by these treatments often cannot meet the normal needs, which may induce problems such as donor site lesions [15,16]. For patients with severe joint disease, total joint replacement surgery is required.To date, tremendous efforts have been pursued to improve the quality of biomaterials for applications in artificial joints. Although different bearing couples such as 'hard-on-hard'This is an open access article under the terms of the Creative Commons Attribution-NonCommercial License, which permits use, distribution and reproduction in any medium, provided the original work is pr...

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Section: Surface Modification Of Hydrogelmentioning

confidence: 99%

Recent progress of bioinspired cartilage hydrogel lubrication materials

Zhao

Zhang

et al. 2022

Biosurface and Biotribology

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“…Over the past decade of booming development, various kinds of smart hydrogels with stimuli responsiveness have been developed by modifying stimuli-responsive polymers [11][12][13], introducing functional additives [14][15][16] and designing ingenious structures [17][18][19]. At this stage, the stimuli-responsive smart hydrogels show multi-type changes in size, shape, optical properties, mechanical properties and electric properties adapting to various external stimuli [20][21][22][23][24][25][26][27], and they have been widely applied in soft actuators [5,[28][29][30] and other intelligence areas [31][32][33][34][35][36][37][38]. For example, Wu's group [39][40][41] reported a series of smart hydrogels with elaborately ordered structures of nano-additives, which capable of programmed deformations and actuations as soft robots under stimulation of heat, light, and electric field.…”

Section: Introductionmentioning

confidence: 99%

Touch-Responsive Hydrogel for Biomimetic Flytrap-Like Soft Actuator

Wei

et al. 2022

Nano-Micro Lett.

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Stimuli-responsive hydrogel is regarded as one of the most promising smart soft materials for the next-generation advanced technologies and intelligence robots, but the limited variety of stimulus has become a non-negligible issue restricting its further development. Herein, we develop a new stimulus of “touch” (i.e., spatial contact with foreign object) for smart materials and propose a flytrap-inspired touch-responsive polymeric hydrogel based on supersaturated salt solution, exhibiting multiple responsive behaviors in crystallization, heat releasing, and electric signal under touch stimulation. Furthermore, utilizing flytrap-like cascade response strategy, a soft actuator with touch-responsive actuation is fabricated by employing the touch-responsive hydrogel and the thermo-responsive hydrogel. This investigation provides a facile and versatile strategy to design touch-responsive smart materials, enabling a profound potential application in intelligence areas.

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“…Water spiders , evolve superhydrophobic fibered skin to actively capture bubbles and replenish air pockets. Pitcher plants , and fish − are two representative examples of lubricated liquid-repellent surfaces, both of which take advantage of physical multiscale structures or chemical bonds to stably trap and lock liquid lubricants and repel versatile contamination by either liquids or solids. An appealing feature of these liquid-repellent surfaces is the stable and durable repellent medium both in the air and underwater.…”

Section: Introductionmentioning

confidence: 99%

Liquid-Repellent Surfaces

Wang

2022

Langmuir

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Surfaces are vibrant sites for various activities with environments, especially as the transfer station for mass and energy exchange. In nature, natural creatures exhibit special wetting and interfacial properties such as water repellency and water affinity to adapt to various environmental challenges by taking advantage of air or liquid infusion media. Inspired by natural surfaces, various engineered liquid-repellent surfaces have been developed with a wide range of applications in both open and closed underwater environments. In particular, underwater conditions are characterized by high viscosity, high pressure, and complex compositions, which pose more challenges for the design of robust and functional repellent surfaces. In this Perspective, we take a parallel approach to introduce two classical liquid-repellent surfaces: an air-infused repellent surface and a lubricated liquid-repellent surface. Then we highlight fundamental challenges and design configurations of robust liquid-repellent surfaces both in air and underwater. We summarize the advantages and drawbacks of two kinds of repellent surfaces and list several applications of liquid-repellent surfaces for use in the ocean, medical care, and energy harvesting. Finally, we provide an outlook of research directions for robust liquid-repellent surfaces.

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Modulus adaptive lubricating prototype inspired by instant muscle hardening mechanism of catfish skin

Cited by 72 publications

References 53 publications

Recent progress of bioinspired cartilage hydrogel lubrication materials

Recent progress of bioinspired cartilage hydrogel lubrication materials

Touch-Responsive Hydrogel for Biomimetic Flytrap-Like Soft Actuator

Liquid-Repellent Surfaces

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