Humidity responsive self-healing based on intermolecular hydrogen bonding and metal–ligand coordination

Zhu, Yue; Xuan, Hongyun; Ren, Jiaoyu; Liu, Xuefan; Zhao, Bo; Zhang, Jianhao; Ge, Liqin

doi:10.1039/c6ra11418k

Cited by 19 publications

(12 citation statements)

References 42 publications

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“…With the increasing applications of structural polymers in the aquatic environment, the demand for coupling the products with a self-healing ability for strength recovery from damage naturally emerges. However, the researched products in this aspect − (except the nonstructural materials like hydrogels, − adhesives, − and coatings − ) are not as prosperous as those in the absence of water, probably because water causes difficulty in existing healing chemistries. For example, the healing agent released from an extrinsic self-healing system would be deactivated by water, while hydrophobic chains on the fractured surfaces of intrinsically self-healable polymers tend to curl up in water preventing interactions between most available reversible bonds …”

Section: Introductionmentioning

confidence: 99%

Self-Healing of Polymer in Acidic Water toward Strength Restoration through the Synergistic Effect of Hydrophilic and Hydrophobic Interactions

Xia

Xiong

Rong

et al. 2017

ACS Appl. Mater. Interfaces

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To improve reliability, durability, and reworkability of bulk polymers utilized in ubiquitous acidic water, the authors develop a novel hyperbranched polymer capable of self-healing and recycling in a low-pH aqueous environment. The hyperbranched polymer has many hydrophilic and hydrophobic terminal groups. When it is damaged in acidic water, the hydrophilic groups are protonated, forming hydrogen bonds, and closing the crack. Meanwhile, hydrophobic interactions of hydrophobic groups are gradually established across the interface because of the intimate contact of the cracked surface, further reinforcing the rebonded portion. The amphiphilic structure proves to meet both the thermodynamic and kinetic requirements for autonomous rehabilitation. As a result, the unfavored water, which used to impede adhesion between hydrophobic polymeric materials, turns into a positive aid to crack healing. The mechanism involved is carefully analyzed and verified in terms of micro- and macroscopic techniques. The proposed operating environment-oriented design of the stimulus-responsive macromolecule may help to broaden the family of underwater self-healing polymers and their application scope.

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Section: Introductionmentioning

confidence: 99%

Self-Healing of Polymer in Acidic Water toward Strength Restoration through the Synergistic Effect of Hydrophilic and Hydrophobic Interactions

Xia

Xiong

Rong

et al. 2017

ACS Appl. Mater. Interfaces

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“…The CS/CMC polyelectrolyte coatings were fabricated via the LBL assembly technique by Zhu et al 21 First, a glass substrate was immersed in the CS solution for 10 min to obtain the glass-CS, and then it was washed 5 times to take off the residue CS solution. Second, the glass-CS was immersed into the CMC solution for 10 min to obtain the glass-CS/CMC*1 polyelectrolyte coating, then it also was washed 5 times to wash off the residue CMC solution.…”

Section: Fabrication the Cs/cmc Polyelectrolyte Multilayer Coatingmentioning

confidence: 99%

An antibacterial and biocompatible multilayer biomedical coating capable of healing damages

et al. 2020

Self Cite

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“…The GO sheets affect the growth and reactions of oxidative multilayers, enhance the elasticity of the films, and bring about a clear terminating layer effect. In addition, both the (PP/Ce) and (GO/Ce/PP/Ce) LbL films represent rather little studied metal-polymer LbL multilayers based on metal coordination bonds, − and this work yields more insight into the structure and properties of such films.…”

Section: Introductionmentioning

confidence: 96%

Oxidative Layer-By-Layer Multilayers Based on Metal Coordination: Influence of Intervening Graphene Oxide Layers

et al. 2018

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Layer-by-layer (LbL) fabricated oxidative multilayers consisting of successive layers of inorganic polyphosphate (PP) and Ce(IV) can electrolessly form thin conducting polymer films on their surface. We describe the effect of substituting every second PP layer in the (PP/Ce) multilayers for graphene oxide (GO) as a means of modifying the structure and mechanical properties of these (GO/Ce/PP/Ce) films and enhancing their growth. Both types of LbL films are based on reversible coordinative bonding between the metal ions and the oxygen-bearing groups in PP and GO, instead of purely electrostatic interactions. The GO incorporation leads to the doubling of the areal mass density and to a dry film thickness close to 300 nm after 4 (GO/Ce/PP/Ce) tetralayers. The film roughness increases significantly with thickness. The (PP/Ce) films are soft materials with approximately equal shear storage and loss moduli, but the incorporation of GO doubles the storage modulus. PP displays a marked terminating layer effect and practically eliminates mechanical losses, making the (GO/Ce/PP/Ce) films almost pure soft elastomers. The smoothness of the (PP/Ce) films and the PP-termination effects are attributed to the reversible coordinative bonding. The (GO/Ce/PP/Ce) films oxidize pyrrole and 3,4-ethylenedioxythiophene (EDOT) and form polypyrrole and PEDOT films on their surfaces. These polymer films are considerably thicker than those formed using the (PP/Ce) multilayers with the same nominal amount of cerium layers. The GO sheets interfere with the polymerization reaction and make its kinetics biphasic. The (GO/Ce) multilayers without PP are brittle and thin.

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Humidity responsive self-healing based on intermolecular hydrogen bonding and metal–ligand coordination

Abstract: Self-healing process occurring when a self-healing Co–CS/PAA PEM film is integrated (I), damaged (II), self-healing (III), and self-healed (IV).

Cited by 19 publications

References 42 publications

Self-Healing of Polymer in Acidic Water toward Strength Restoration through the Synergistic Effect of Hydrophilic and Hydrophobic Interactions

Self-Healing of Polymer in Acidic Water toward Strength Restoration through the Synergistic Effect of Hydrophilic and Hydrophobic Interactions

An antibacterial and biocompatible multilayer biomedical coating capable of healing damages

Oxidative Layer-By-Layer Multilayers Based on Metal Coordination: Influence of Intervening Graphene Oxide Layers

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