Supramolecular adhesive materials from small‐molecule self‐assembly

SmartMat, Journal Year: 2020, Volume and Issue: 1(1)

Published: Nov. 25, 2020

Abstract Developing high‐performance adhesive materials not only aims at industrial and social requirements but also bears the fundamental importance of understanding chemical factors biological adhesion to develop biomimetic materials. Owing wide development supramolecular chemistry, numerous tools are exploited proved be reliable in replacement traditional covalent by reversible noncovalent or dynamic Taking advantage these ready‐to‐use toolboxes, rising promising toward “smart” adhesives, that is, enabling responsiveness, reversibility, recyclability. Compared with polymeric materials, low‐molecular‐weight adhesives feature chemically precise structure, easier engineering molecular design, hence higher reproducibility. However, it remains highly challenging make feedstocks. This review will focus on recent advancement construction small‐molecule self‐assembly. The design guidelines consideration scale discussed summarized how enhance strength adhesives. Meanwhile, owing nature self‐assembly, several functions such presented, as stimuli–responsiveness adaptiveness. Finally, current challenges future perspectives this emerging field proposed.

Language: Английский

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A Mortise‐and‐Tenon Joint Inspired Mechanically Interlocked Network

Angewandte Chemie International Edition, Journal Year: 2021, Volume and Issue: 60(29), P. 16224 - 16229

Published: May 12, 2021

Abstract Mortise‐and‐tenon joints have been widely used for thousands of years in wooden architectures virtue their artistic and functional performance. However, imitation similar structural mechanical design philosophy to construct mechanically adaptive materials at the molecular level is a challenge. Herein, we report mortise‐and‐tenon joint inspired interlocked network (MIN), which [2]rotaxane crosslink not only mimics structure, but also reproduces its function modifying properties MIN. Benefiting from hierarchical energy dissipative ability along with controllable intramolecular movement crosslink, resultant MIN simultaneously exhibits notable adaptivity stability single system, as manifested by decent stiffness, strength, toughness, deformation recovery capacity.

Language: Английский

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Force-Induced Near-Infrared Chromism of Mechanophore-Linked Polymers

Journal of the American Chemical Society, Journal Year: 2021, Volume and Issue: 143(42), P. 17337 - 17343

Published: Sept. 29, 2021

A near-infrared (NIR) mechanophore was developed and incorporated into a poly(methyl acrylate) chain to showcase the first force-induced NIR chromism in polymeric materials. This mechanophore, based on benzo[1,3]oxazine (OX) fused with heptamethine cyanine moiety, exhibited mechanochromism solution, thin-film, bulk states. The mechanochemical activity validated using UV–vis–NIR absorption/fluorescence spectroscopies, gel permeation chromatography (GPC), NMR, DFT simulations. Our work demonstrates that mechanochromic polymers have considerable potential mechanical force sensing, damage detection, bioimaging, biomechanics.

Language: Английский

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Amine-Cured Glycidyl Esters as Dual Dynamic Epoxy Vitrimers

Macromolecules, Journal Year: 2022, Volume and Issue: 55(2), P. 523 - 534

Published: Jan. 4, 2022

It is of greater significance to develop amine-cured epoxy vitrimers than conventional epoxy-carboxylic acid because amines are the most widely curing agents carboxylic acids. Considering that reaction with glycidyl esters can skillfully create dynamic hydroxyl esters, so we synthesized aliphatic and aromatic then cured them by amine-curing containing disulfide bonds. Here, besides generated bonds also integrated into cross-linked network form dual vitrimers. The show very high-efficiency reactivity due lower activation energy. properties be easily tuned via proportion realize transition from rubber state glass state. Moreover, combinations enhancement toughening achieved addition without sacrificing activity reprocessing property. Compared single vitrimers, exhibit excellent performances unique rheological characteristics exchange reactions transesterification at high temperatures, which enables reprocessed 180 °C for only 5 min.

Language: Английский

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Supramonomers for controllable supramolecular polymerization and renewable supramolecular polymeric materials

Progress in Polymer Science, Journal Year: 2021, Volume and Issue: 124, P. 101486 - 101486

Published: Nov. 14, 2021

Language: Английский

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