The Deeply Understanding of the Self‐Healing Mechanism for Self‐Healing Behavior of Supramolecular Materials Based on Cyclodextrin–Guest Interactions

Guo, Kun; Lin, Musong; Feng, Junfeng; Pan, Min; Ding, Li‐Sheng; Li, Bang‐Jing; Zhang, Sheng

doi:10.1002/macp.201600593

Cited by 11 publications

(5 citation statements)

References 47 publications

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“…In this paper, the host–guest interactions were chosen as dynamic healing motifs to endow self-healing ability to materials because they are stable in moisture conditions and then the self-healing of the resulting material is not affected by surface ageing. − The synthesis procedure of DN elastomer is shown is Scheme .…”

Section: Resultsmentioning

confidence: 99%

Tough Self-Healing Elastomers Based on the Host–Guest Interaction of Polycyclodextrin

Hou

Zhang

et al. 2019

ACS Appl. Mater. Interfaces

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Inspired by animal muscles, we developed a kind of tough elastomers combining high strength and high stretchability with autonomous self-healing capability. A key structural feature is the construction of a double network (DN) connected by the hydrogen bond and host−guest interactions. The first network is the classic elastomer polyacrylate matrix cross-linked by strong hydrogen bonding. The second network is formed through the host−guest interactions between polycyclodextrin and the adamantane (Ad) groups on the side of the polyacrylate chain. Supramolecular interactions between two networks make them miscible and interpenetrate in the molecular level and then can share the load as the sample was stretched. The host−guest interactions act not only as sacrificial bonds for energy dissipation but also as self-healing driving forces. The tensile strength of the DN elastomer reaches about 6.7 MPa and the strain is as high as about 950%. The DN elastomer can be easy to repair by touching the damaged surface together at ambient conditions when broken or cut. The recovered tensile strength can reach over 4.5 MPa, which is better than the most pristine strength of existing spontaneous self-healing elastomers.

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Section: Resultsmentioning

confidence: 99%

Tough Self-Healing Elastomers Based on the Host–Guest Interaction of Polycyclodextrin

Hou

Zhang

et al. 2019

ACS Appl. Mater. Interfaces

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“…Such transient bonds are in the dynamic equilibrium between associated and dissociated states. Consequently, supramolecular polymer networks response to the external stimuli and have potential to use for designing electronic, optic‐electronic, drug‐delivery, and/or self‐healing materials. The supramolecular polymer networks are divided in 2 general types.…”

Section: Introductionmentioning

confidence: 99%

Dynamics of entangled supramolecular polymer networks in presence of high‐order associations of strong hydrogen bonding groups

Jangizehi

Ghaffarian

Ahmadi

2017

Polymers for Advanced Techs

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Dynamics of entangled polymer chains in the melt state are deliberately excluded in most of the studies on supramolecular polymer networks by utilizing nonentangled precursor chains. Relaxation of the system mainly depends on the dissociation of the associative groups in latter case and nonentangled chains deliver nothing to resist afterward. Conversely, in an entangled system, relaxation of polymer chains and dissociation of associative groups can occurred parallel.Supramolecular networks based on an entangled precursor polymer with different levels of strong associating ureidopyrimidinone (UPy) groups are synthesized to screen the corresponding effects on the dynamics of the system. Binary-associated UPy groups phase separate into collective assemblies by stacking and form high-order, needle-like domains at higher UPy contents. Relaxation of polymer chains is significantly hindered due to the trapping of polymer segments between UPy stacks. Above a certain threshold of UPy content (~4 mol%), the plateau level and final relaxation time of networks show a significant jump, which is attributed to the onset of high-order association of UPy groups. KEYWORDS chain dynamics, high-order associations, supramolecular networks 1 | INTRODUCTION Supramolecular polymer networks are macromolecular structures in which a fraction of covalent bonds are replaced with transient associations, 1-6 such as ionic attractions, 7-11 metal-ligand coordinations, [12][13][14][15][16][17] hydrogen bondings, 18-21 or π-π interactions. 22,23 Such transient bonds are in the dynamic equilibrium between associated and dissociated states. Consequently, supramolecular polymer networks response to the external stimuli and have potential to use for designing electronic, 24,25 optic-electronic, 26,27 drug-delivery, 28-32 and/or selfhealing 17,33-40 materials. The supramolecular polymer networks are divided in 2 general types. In the first type, the polymeric building blocks have associative groups at both extremities, and the virtual molar mass is increased by chain extension due to the self-assembly of end groups.In the second type, the linear or branched polymer chains carry pendant associative "sticky" groups. 41 Hydrogen bonding moieties are widely used for designing supramolecular polymers, since they demonstrate very broad range of strength, which can be controlled by the number and the configuration of the interactions. 42,43 One of these promising moieties is ureidopyrimidinone (UPy) group, which self-assembles with highstrength, quadruple hydrogen bonds. [44][45][46][47][48][49][50] Low molar mass telechelic polymers that are viscous liquid at room temperature show properties like solid polymers after functionalization with UPy groups. [51][52][53][54][55][56][57] Binary-associated UPy moieties create π-π stacking when the UPy motifs are linked to the building block chains by urethane or urea groups, which can form lateral-secondary interactions. 56,[58][59][60] The formation of micrometer long fibers in the morphology of UPy-functionalized...

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“…It was found that sufficient polymer chains mobility, a small amount of water, and high inclusion constant of host-guest interactions were essential to the self-healing process for this kind of composites [45].…”

Section: Self-healing Composites Based On Cd-guest Interactionsmentioning

confidence: 99%

Cyclodextrins-Based Shape Memory Polymers and Self-Healing Polymers

Zhang¹,

Zeng²,

2019

Handbook of Macrocyclic Supramolecular Assembly

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The Deeply Understanding of the Self‐Healing Mechanism for Self‐Healing Behavior of Supramolecular Materials Based on Cyclodextrin–Guest Interactions

Cited by 11 publications

References 47 publications

Tough Self-Healing Elastomers Based on the Host–Guest Interaction of Polycyclodextrin

Tough Self-Healing Elastomers Based on the Host–Guest Interaction of Polycyclodextrin

Dynamics of entangled supramolecular polymer networks in presence of high‐order associations of strong hydrogen bonding groups

Cyclodextrins-Based Shape Memory Polymers and Self-Healing Polymers

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