Weak Coordination-Induced Dynamic Crosslinked, Adjustable Strength, Reversible Adhesion Supramolecular Hydrogel

2021 ◽  
Author(s):  
Wenzhuo Zhu ◽  
Shuai Zhou ◽  
Jian Wang ◽  
Wen Sun ◽  
Jinxing Chen ◽  
...  
Keyword(s):  
Supramolecular Hydrogel ◽  
Reversible Adhesion ◽  
Weak Coordination

Skin and dry adhesion

2018 ◽  
Author(s):  
Changhyun Pang ◽  
Chanseok Lee ◽  
Hoon Eui Jeong ◽  
Kahp-Yang Suh
Keyword(s):  
Material Properties ◽  
Structural Features ◽  
Mechanical Interlocking ◽  
Multi Scale ◽  
Skin Patch ◽  
Reversible Adhesion ◽  
Dry Adhesion ◽  
Close Observation ◽  
Dry Adhesives ◽  
Shed Light

Close observation of various attachment systems in animal skins has revealed various exquisite multi-scale architectures for essential functions such as locomotion, crawling, mating, and protection from predators. Some of these adhesion systems of geckos and beetles have unique structural features (e.g. high-aspect ratio, tilted angle, and hierarchical nanostructure), resulting in mechanical interlocking mediated by van der Waals forces or liquid secretion (capillary force). In this chapter, we present an overview of recent advances in bio-inspired, artificial dry adhesives, and biomimetics in the context of nanofabrication and material properties. In addition, relevant bio-inspired structural materials, devices (clean transportation device, interlocker, biomedical skin patch, and flexible strain-gauge sensor) and microrobots are briefly introduced, which would shed light on future smart, directional, and reversible adhesion systems.

Luminescent Polymorphic Aggregates of Trinuclear Cu(I)-pyrazolate Tuned by Intertrimeric Cu···NPy Weak Coordination Bonds

2021 ◽  
Author(s):  
Shun-Ze Zhan ◽  
Wei Chen ◽  
Ji Zheng ◽  
Seik Weng Ng ◽  
Dan Li
Keyword(s):  
Coordination Bonds ◽  
Weak Coordination

Five luminescent polymorphic aggregates of trinuclear Cu(I)-pyrazolate, namely [anti-Cu3L3]2 (1), [syn-Cu3L3·C2H5OH]2 (2), [anti-Cu3L3·C2H5OH]n (3), [anti-Cu3L3·0.5C7H8]n (4) and [syn-Cu3L3·C8H10]n (5) (HL = 4-(pyridin-4-ylthio)-3,5-dimethyl-1H-pyrazole), were reported. The trimeric Cu3L3 fragments present syn-...

scholarly journals Harnessing reversible dry adhesion using shape memory polymer microparticles

RSC Advances ◽  
2021 ◽  
Vol 11 (32) ◽  
pp. 19616-19622
Author(s):  
Wenbing Li ◽  
Junhao Liu ◽  
Wanting Wei ◽  
Kun Qian
Keyword(s):  
Shape Memory ◽  
Shape Memory Polymer ◽  
Shape Memory Polymers ◽  
Memory Effects ◽  
Reversible Adhesion ◽  
Dry Adhesion ◽  
Bonding Property ◽  
Shape Memory Effects ◽  
Polymer Microparticles

Shape memory polymers can provide excellent bonding property because of their shape memory effects. This paper proposes an adhesive unit that is capable of repeatable smart adhesion and exhibits reversible adhesion under heating.

scholarly journals Selective release of a potent anticancer agent from a supramolecular hydrogel using green light

RSC Advances ◽  
2021 ◽  
Vol 11 (15) ◽  
pp. 8546-8551
Author(s):  
Johannes Karcher ◽  
Susanne Kirchner ◽  
Anna-Lena Leistner ◽  
Christian Hald ◽  
Philipp Geng ◽  
...  
Keyword(s):  
Anticancer Agent ◽  
Green Light ◽  
Supramolecular Hydrogel ◽  
Triggered Release ◽  
Physiological Conditions

Selective green-light triggered release of an anticancer agent under physiological conditions from a supramolecular hydrogel.

Host–guest interaction-mediated fabrication of a hybrid microsphere-structured supramolecular hydrogel showing high mechanical strength

Soft Matter ◽  
2020 ◽  
Vol 16 (14) ◽  
pp. 3416-3424
Author(s):  
Xiongzhi Zhang ◽  
Yuanxun Liu ◽  
Junwei Wen ◽  
Zhiyong Zhao ◽  
Hongxiang Chen ◽  
...  
Keyword(s):  
Mechanical Strength ◽  
Supramolecular Hydrogel ◽  
High Mechanical Strength

The introduction of structured microsphere composites into hydrogels is found to improve their mechanical strength capability.

A colon-targeted podophyllotoxin nanoprodrug: synthesis, characterization, and supramolecular hydrogel formation for the drug combination

2021 ◽  
Vol 9 (14) ◽  
pp. 3200-3209
Author(s):  
Wei Ha ◽  
Xiao-Bo Zhao ◽  
Wei-Hua Zhao ◽  
Jiang-Jiang Tang ◽  
Yan-Ping Shi
Keyword(s):  
Self Assembly ◽  
Drug Combination ◽  
Therapeutic Agents ◽  
Supramolecular Hydrogel ◽  
Assembly Strategy ◽  
Hydrogel Formation

An ingeniously designed podophyllotoxin nanoprodrug was synthesized and offered an effective platform for co-delivery of multiple therapeutic agents for drug combination via the hierarchical self-assembly strategy.

Bioinspired self-assembly supramolecular hydrogel for ocular drug delivery

2021 ◽  
Author(s):  
Xianglian Li ◽  
Hui Liu ◽  
Ailing Yu ◽  
Dan Lin ◽  
Zhishu Bao ◽  
...  
Keyword(s):  
Drug Delivery ◽  
Self Assembly ◽  
Ocular Drug Delivery ◽  
Supramolecular Hydrogel
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