Intrinsic Self-Healing Polymers Based on Supramolecular Interactions: State of the Art and Future Directions

Enke, Marcel; Döhler, Diana; Bode, Stefan; Binder, Wolfgang H.; Hager, Martin D.; Schubert, Ulrich S.

doi:10.1007/12_2015_345

Cited by 39 publications

(36 citation statements)

References 255 publications

(346 reference statements)

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“…The parameters used for modeling the labile slip and catch bonds are shown in Table . For all labile bonds, the bond energy is set to

U_{0}^{l} = 39 k_{normalB} T

, which lies within the range of energies characteristic of thiol/disulfide exchange reactions and supramolecular interactions that are used for fabricating self‐healing polymers . As in our previous studies, the sensitivity of the rupture of slip bonds to an applied force is set

γ_{0} = 6 F_{0}^{- 1}

, where

F_{0}

is the unit of force (see Table ).…”

Section: Methodsmentioning

confidence: 99%

Tailoring the mechanical properties of nanoparticle networks that encompass biomimetic catch bonds

Zhang

Mbanga

Yashin

et al. 2017

J Polym Sci B Polym Phys

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Biological "catch" bonds display the distinctive attribute that the bond lifetime can increase under an applied force. Insertion of biomimetic catch bonds into hybrid materials could lead to composites that exhibit remarkable mechanical properties. We model the tensile behavior of polymergrafted nanoparticle (PGN) networks interconnected by a mixture of catch bonds and conventional "slip" bonds, whose lifetimes decrease with force. We formulate a kinetic master equation that provides the complete probabilistic description of a system of two PGNs. The master equation is used to analyze the parameter space that determines the rupture behavior of the catch bonds in the two-particle system. We then utilize two exemplary sets of catch bond parameters in threedimensional computer simulations of larger PGN networks under strain-controlled tensile deformation. We demonstrate that the strain at break and toughness of the networks can be altered by "tuning" the attributes of the catch bonds and varying the fraction of catch bonds in the network. We show that networks encompassing the catch bonds could exhibit a several-fold increase in the strain-at-break and toughness relative to those interconnected solely by the slip bonds. Our studies can provide valuable guidelines for tailoring the mechanical properties of novel, bio-inspired nanocomposites.

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“…The parameters used for modeling the labile slip and catch bonds are shown in Table . For all labile bonds, the bond energy is set to

U_{0}^{l} = 39 k_{normalB} T

γ_{0} = 6 F_{0}^{- 1}

, where

F_{0}

is the unit of force (see Table ).…”

Section: Methodsmentioning

confidence: 99%

Tailoring the mechanical properties of nanoparticle networks that encompass biomimetic catch bonds

Zhang

Mbanga

Yashin

et al. 2017

J Polym Sci B Polym Phys

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“…Whereas extrinsic self‐healing polymers are based on an encapsulated healing agent, intrinsic self‐healing polymers require a specific polymer design, i.e., the incorporation of reversible interactions into the polymeric structure . These reversible units can be either based on reversible supramolecular interactions, such as hydrogen bonds and metal‐ligand interactions, respectively . Alternatively, reversible covalent bonds, which feature a bonding‐debonding behavior triggered by an external stimulus (e.g., light or heat) can be utilized .…”

Section: Introductionmentioning

confidence: 99%

Increased stability in self‐healing polymer networks based on reversible Michael addition reactions

Kuhl

Geitner

Vitz

et al. 2017

J of Applied Polymer Sci

Self Cite

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A reversible thiol-ene click reaction is utilized to design novel self-healing polymers. These materials are based on a new methacrylate monomer featuring a benzylcyanoacetamide derivative, which is copolymerized with butyl methacrylate. Afterwards, the crosslinking is performed by the addition of a dithiol and a tetrathiol, respectively. Self-healing behavior is obtained by heating the crosslinked polymers to 100 8C (150 8C) for several hours and is monitored by scratch healing experiments utilizing an optical microscope. The thermal properties are studied in detail by differential scanning calorimetry as well as thermogravimetric analysis. Moreover, depth-sensing indentation measurements are performed to determine the mechanical properties. The healing process is based on the reversible cleavage/closing of the bonds (i.e., thiol-ene reaction), which could be demonstrated by Raman spectroscopy. V C 2017Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017, 134, 44805. Recently, also the reversible thiol-Michael addition was utilized for the fabrication of novel intrinsic self-healing polymers. 26 Kuhl et al. prepared a crosslinked network by the reaction of a bis-benzylcyanoacetamide linker with a trithiol, which features self-healing properties. 26 However, the applicable healing temperature was limited to 60 8C because of thermal instabilities at higher temperatures, which results in a depolymerization of the network accompanied by H 2 S formation and a subsequent irreversible thiol-ene click reaction.In order to overcome this problem, two new crosslinked polymers based on the reversible Michael addition were designed, Additional Supporting Information may be found in the online version of this article.

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“…Very precise design of dynamics and responsiveness can be obtained by fabricating highly well‐defined transparent films by layer‐by‐layer assembly . Binder and co‐workers reported a synthetic strategy of soft‐hard‐soft triblock copolymers with a reversible supramolecular healing motif in the central part of the hard block …”

Section: Introductionmentioning

confidence: 99%

Adaptive Polymeric Coatings with Self‐Reporting and Self‐Healing Dual Functions from Porous Core–Shell Nanostructures

Wang

Zhou

et al. 2018

Macro Materials & Eng

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In biological system, early detection and treatment at the same moment is highly required. For synthetic materials, it is demanding to develop materials that possess self‐reporting of early damage and self‐healing simultaneously. This dual function is achieved in this work by introducing an intelligent pH‐responsive coatings based on poly(divinylbenzene)‐graft‐poly(divinylbenzene‐co‐methacrylic acid) (PDVB‐graft‐P(DVB‐co‐AA)) core–shell microspheres as smart components of the polymer coatings for corrosion protection. The key component, synthesized PDVB‐graft‐P(DVB‐co‐AA) core–shell microspheres are porous and pH responsive. The porosity allows for encapsulation of the corrosion inhibitor of benzotriazole and the fluorescent probe, coumarin. Both loading capacities can be up to about 15 wt%. The polymeric coatings doped with the synthesized microspheres can adapt immediately to the varied variation in pH value from the electrochemical corrosion reaction and release active molecules on demand onto the damaged cracks of the coatings on metal surfaces. It leads simultaneously to the dual functions of self‐healing and self‐reporting. The corrosion area can be self‐reported in 6 h, while the substrate can be protected at least for 1 month in 3.5 wt% NaCl solution. These pH‐responsive materials with self‐reporting and self‐healing dual functions are highly expected to have a bright future due to their smart, long‐lasting, recyclable, and multifunctional properties.

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Intrinsic Self-Healing Polymers Based on Supramolecular Interactions: State of the Art and Future Directions

Cited by 39 publications

References 255 publications

Tailoring the mechanical properties of nanoparticle networks that encompass biomimetic catch bonds

Tailoring the mechanical properties of nanoparticle networks that encompass biomimetic catch bonds

Increased stability in self‐healing polymer networks based on reversible Michael addition reactions

Adaptive Polymeric Coatings with Self‐Reporting and Self‐Healing Dual Functions from Porous Core–Shell Nanostructures

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