scholarly journals Rücktitelbild: Supramolecular Velcro for Reversible Underwater Adhesion (Angew. Chem. 11/2013)

2013 ◽  
Vol 125 (11) ◽  
pp. 3364-3364
Author(s):  
Youngjoo Ahn ◽  
Yoonjung Jang ◽  
Narayanan Selvapalam ◽  
Gyeongwon Yun ◽  
Kimoon Kim
Keyword(s):  
Underwater Adhesion

Attractive forces slow contact formation between deformable bodies underwater

2021 ◽  
Vol 118 (41) ◽  
pp. e2104975118
Author(s):  
Mengyue Sun ◽  
Nityanshu Kumar ◽  
Ali Dhinojwala ◽  
Hunter King
Keyword(s):  
Three Dimensional ◽  
Adhesive Contact ◽  
Final State ◽  
Underwater Adhesion ◽  
Frustrated Total Internal Reflection ◽  
Solid Deformation ◽  
Hydrophilic Surfaces ◽  
Deformable Bodies ◽  
Adhesive Interactions

Thermodynamics tells us to expect underwater contact between two hydrophobic surfaces to result in stronger adhesion compared to two hydrophilic surfaces. However, the presence of water changes not only energetics but also the dynamic process of reaching a final state, which couples solid deformation and liquid evacuation. These dynamics can create challenges for achieving strong underwater adhesion/friction, which affects diverse fields including soft robotics, biolocomotion, and tire traction. Closer investigation, requiring sufficiently precise resolution of film evacuation while simultaneously controlling surface wettability, has been lacking. We perform high-resolution in situ frustrated total internal reflection imaging to track underwater contact evolution between soft-elastic hemispheres of varying stiffness and smooth–hard surfaces of varying wettability. Surprisingly, we find the exponential rate of water evacuation from hydrophobic–hydrophobic (adhesive) contact is three orders of magnitude lower than that from hydrophobic–hydrophilic (nonadhesive) contact. The trend of decreasing rate with decreasing wettability of glass sharply changes about a point where thermodynamic adhesion crosses zero, suggesting a transition in mode of evacuation, which is illuminated by three-dimensional spatiotemporal height maps. Adhesive contact is characterized by the early localization of sealed puddles, whereas nonadhesive contact remains smooth, with film-wise evacuation from one central puddle. Measurements with a human thumb and alternatively hydrophobic/hydrophilic glass surface demonstrate practical consequences of the same dynamics: adhesive interactions cause instability in valleys and lead to a state of more trapped water and less intimate solid–solid contact. These findings offer interpretation of patterned texture seen in underwater biolocomotive adaptations as well as insight toward technological implementation.

A Biosynthetic Hybrid Spidroin-Amyloid-Mussel Foot Protein for Underwater Adhesion on Diverse Surfaces

2021 ◽  
Author(s):  
Eugene Kim ◽  
Juya Jeon ◽  
Yaguang Zhu ◽  
Ethan D. Hoppe ◽  
Young-Shin Jun ◽  
...  
Keyword(s):  
Underwater Adhesion ◽  
Mussel Foot Protein

Strong underwater adhesion of injectable hydrogels triggered by diffusion of small molecules

2021 ◽  
Author(s):  
Xing Su ◽  
Wenyue Xie ◽  
Pudi Wang ◽  
Zhuoling Tian ◽  
Hao Wang ◽  
...  
Keyword(s):  
Small Molecules ◽  
Tea Polyphenols ◽  
Injectable Hydrogels ◽  
Injectable Hydrogel ◽  
Underwater Adhesion ◽  
Physically Crosslinked

It is challenging for injectable hydrogels to achieve high underwater adhesiveness. Based on this concern, we report a fully physically crosslinked injectable hydrogel composed of gelatin, tea polyphenols and urea,...

scholarly journals Bioinspired Metal–Polyphenol Materials: Self-Healing and Beyond

Biomimetics ◽  
2019 ◽  
Vol 4 (2) ◽  
pp. 30 ◽  
Author(s):  
Amanda Andersen ◽  
Yaqing Chen ◽  
Henrik Birkedal
Keyword(s):  
Amino Acid ◽  
Chemical Bonding ◽  
Smart Materials ◽  
Blue Mussel ◽  
Self Healing ◽  
Short Introduction ◽  
Underwater Adhesion ◽  
Metal Chelating ◽  
Physical Interactions ◽  
Ph Dependent

The blue mussel incorporates the polyphenolic amino acid l-3,4-dihydroxyphenylalanine (DOPA) to achieve self-healing, pH-responsiveness, and impressive underwater adhesion in the byssus threads that ensure the survival of the animal. This is achieved by a pH-dependent and versatile reaction chemistry of polyphenols, including both physical interactions as well as reversible and irreversible chemical bonding. With a short introduction to the biological background, we here review the latest advances in the development of smart materials based on the metal-chelating capabilities of polyphenols. We focus on new ways of utilizing the polyphenolic properties, including studies on the modifications of the nearby chemical environment (on and near the polyphenolic moiety) and on the incorporation of polyphenols into untraditional materials.

Water‐Triggered Hyperbranched Polymer Universal Adhesives: From Strong Underwater Adhesion to Rapid Sealing Hemostasis

2019 ◽  
Vol 31 (49) ◽  
pp. 1905761 ◽  
Author(s):  
Chunyan Cui ◽  
Chuanchuan Fan ◽  
Yuanhao Wu ◽  
Meng Xiao ◽  
Tengling Wu ◽  
...  
Keyword(s):  
Hyperbranched Polymer ◽  
Underwater Adhesion ◽  
Universal Adhesives

scholarly journals Recent Advances in Mussel-Inspired Synthetic Polymers as Marine Antifouling Coatings

Coatings ◽  
2020 ◽  
Vol 10 (7) ◽  
pp. 653 ◽  
Author(s):  
Ioannis Manolakis ◽  
Usaid Azhar
Keyword(s):  
Amino Acid Derivative ◽  
Self Healing ◽  
Underwater Adhesion ◽  
Marine Biofouling ◽  
Recent Advances ◽  
Antifouling Coatings ◽  
The Common ◽  
Active Research ◽  
Research Domain ◽  
Marine Antifouling

Synthetic oligomers and polymers inspired by the multifunctional tethering system (byssus) of the common mussel (genus Mytilus) have emerged since the 1980s as a very active research domain within the wider bioinspired and biomimetic materials arena. The unique combination of strong underwater adhesion, robust mechanical properties and self-healing capacity has been linked to a large extent to the presence of the unusual α-amino acid derivative l-DOPA (l-3,4-dihydroxyphenylalanine) as a building block of the mussel byssus proteins. This paper provides a short overview of marine biofouling, discussing the different marine biofouling species and natural defenses against these, as well as biomimicry as a concept investigated in the marine antifouling context. A detailed discussion of the literature on the Mytilus mussel family follows, covering elements of their biology, biochemistry and the specific measures adopted by these mussels to utilise their l-DOPA-rich protein sequences (and specifically the ortho-bisphenol (catechol) moiety) in their benefit. A comprehensive account is then given of the key catechol chemistries (covalent and non-covalent/intermolecular) relevant to adhesion, cohesion and self-healing, as well as of some of the most characteristic mussel protein synthetic mimics reported over the past 30 years and the related polymer functionalisation strategies with l-DOPA/catechol. Lastly, we review some of the most recent advances in such mussel-inspired synthetic oligomers and polymers, claimed as specifically aimed or intended for use in marine antifouling coatings and/or tested against marine biofouling species.

Complex coacervates based on recombinant mussel adhesive proteins: their characterization and applications

Soft Matter ◽  
2017 ◽  
Vol 13 (42) ◽  
pp. 7704-7716 ◽  
Author(s):  
Hyo Jeong Kim ◽  
Byeongseon Yang ◽  
Tae Yoon Park ◽  
Seonghye Lim ◽  
Hyung Joon Cha
Keyword(s):  
Practical Applications ◽  
Adhesive Protein ◽  
Underwater Adhesion ◽  
Significant Potential ◽  
Mussel Adhesive Proteins ◽  
Mussel Adhesive Protein ◽  
Mussel Adhesive ◽  
Adhesive Proteins

Recombinant mussel adhesive protein-based complex coacervates are an effective underwater adhesive and have significant potential in practical applications that require underwater adhesion.

scholarly journals Tough Hydrogels with Fast, Strong, and Reversible Underwater Adhesion Based on a Multiscale Design

2018 ◽  
Vol 30 (32) ◽  
pp. 1801884 ◽  
Author(s):  
Ping Rao ◽  
Tao Lin Sun ◽  
Liang Chen ◽  
Riku Takahashi ◽  
Gento Shinohara ◽  
...  
Keyword(s):  
Underwater Adhesion
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