Self‐Healing and Mendable Supramolecular Polymers

Burattini, Stefano; Colquhoun, Howard M.; Greenland, Barnaby W.; Hayes, Wayne

doi:10.1002/9780470661345.smc134

Cited by 4 publications

(3 citation statements)

References 44 publications

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“…As noted previously, self-healing is an important feature of many biological and artificial materials. ,− There are four approaches that have been used to design and prepare self-healing materials: , (1) using encapsulated-monomer approach; , (2) exploiting irreversible bonds; (3) making use of reversible dynamic covalent bond formation; and (4) taking advantage of supramolecular interactions. , Supramolecular approaches and dynamic covalent bond formation have been exploited by Harada and co-workers to create hydrogels capable of self-healing in both the wet and semi-dry states . Specifically, these researchers reported a self-healing SPN constructed from a α-CD/PEG polyrotaxane and a poly(AAM- co -4-vinylphenylboronic acid) polymeric chain cross-linked with boronate linkages .…”

Section: Supramolecular Polymeric Network Constructed Via the Combina...mentioning

confidence: 99%

Functional Supramolecular Polymeric Networks: The Marriage of Covalent Polymers and Macrocycle-Based Host–Guest Interactions

et al. 2020

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Covalent polymers connected by non-covalent interactions constitute a fascinating set of materials known as supramolecular polymer networks (SPNs). A key feature of SPNs is that the underlying covalent polymers endow the resulting self-assembled materials with features, such as structural and mechanical integrity, good processability, recyclability, stimuli-responsiveness, self-healing, and shape memory, that are not recapitulated in the case of classic covalent polymer systems. The unique nature of SPNs derives from the controlled marriage of traditional covalent polymers and macrocycle-based host−guest interactions. As a consequence, supramolecular polymeric networks have played important roles in a number of diverse fields, including polymer science, supramolecular chemistry, materials science, biomedical materials, and information storage technology. In this Review, we summarize advances made in the area of functional SPNs, with a focus on original literature reports appearing in the past five years. The treatment is organized according to the key macrocycle-based host−guest interactions used to produce various SPNs. The role of the underlying polymer backbones is also discussed.

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Section: Supramolecular Polymeric Network Constructed Via the Combina...mentioning

confidence: 99%

Functional Supramolecular Polymeric Networks: The Marriage of Covalent Polymers and Macrocycle-Based Host–Guest Interactions

et al. 2020

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“…[3,4] The switchable nature of supramolecular polymers has been investigated for a wide range of potential applications including adhesives, surface-coatings and healable materials. [4][5][6] As a consequence of the highly addressable assembly motifs, supramolecular polymers offer a route to novel materials and properties which can be easily processed at relatively low temperatures. [7] Narrow processing windows are afforded through dissociation and subsequent reassociation of recognition motifs when subjected to external stimulus such as heat, light or pressure.…”

Section: Introductionmentioning

confidence: 99%

Property enhancement of healable supramolecular polyurethanes

Salimi

Hart

Feula

et al. 2019

European Polymer Journal

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Low molecular weight additives which can cooperatively self-assemble with supramolecular polyurethanes via complementary hydrogen bonding interactions offer an attractive route to enhancing the properties of addressable polymer networks. Here, we present the design, synthesis, characterisation and mechanical properties of a series of supramolecular polyurethanes with varied loadings of a low molecular weight bis-urea additive. These additives are able to self-assemble with analogous recognition motifs within the supramolecular polyurethanes to form polar 'hard' domains, promoting phase separation within the material and, crucially, increasing the strength of the polymer network. In addition, the bis-urea additive is a by-product within the polymerisation and thus can be synthesised in situ, without the need for complex purification or blending. The mechanical properties of these reinforced polymers were enhanced when compared to the pristine supramolecular polyurethane alone, as a result of higher degrees of order within the polymer matrix. Furthermore, a formulation comprising the small molecule blended with the supramolecular polyurethane was produced to examine the effect of material preparation and filler dispersion within the polymer matrix. Interestingly, the mechanical performance of a blended material was diminished as a result of modest dispersion and incorporation within the polymer matrix. These findings thus demonstrate a facile, one-pot, method that does not require purification to produce reinforced supramolecular polyurethanes. This methodology may find use in industrial applications in which enhancements to the physical and mechanical properties can be easily achieved through the in situ synthesis of low molecular weight additives within the polymerisation.

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“…A significant number of different self-healing systems at elevated [116,[118][119][120][121][122][123][124][125][126][127][128][129][130][131][132][133][135][136][137][138][139][140] (Fig. 13 and Table 1).…”

Section: Bis(urea)-based Hydrogen Bonding Interactionsmentioning

confidence: 97%

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

Enke

Döhler

Bode

et al. 2015

Self-Healing Materials

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Supramolecular polymers are an intriguing class of materials with dynamic behavior as a result of the presence of non-covalent bonds. These bonds include hydrogen bonds, metallopolymers, ionomers, host-guest as well as π-π interactions. The strength of these supramolecular bonds can be tuned by varying the binding motifs. Their reversible and dynamic character can be utilized to engineer self-healing polymers. This review briefly presents the preconditions for design of self-healing polymers and summarizes the development of supramolecular self-healing polymers based on various non-covalent interactions. Furthermore, challenges and perspectives for the understanding of self-healing mechanisms and the preparation of novel materials with enhanced properties are discussed.

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Self‐Healing and Mendable Supramolecular Polymers

Cited by 4 publications

References 44 publications

Functional Supramolecular Polymeric Networks: The Marriage of Covalent Polymers and Macrocycle-Based Host–Guest Interactions

Functional Supramolecular Polymeric Networks: The Marriage of Covalent Polymers and Macrocycle-Based Host–Guest Interactions

Property enhancement of healable supramolecular polyurethanes

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

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