Thermo- and pH-sensitive shape memory polyurethane containing carboxyl groups

Song, Qiuju; Chen, Hongmei; Zhou, Shaobing; Zhao, Ke‐Qing; Wang, Biqing; Hu, Ping

doi:10.1039/c5py02010g

Cited by 81 publications

(60 citation statements)

References 37 publications

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“…Both the FTIR and 1 H‐NMR results showed that the PEG6000‐ i ‐MDI‐DMPA series polymers are successfully synthesized. The structures of PEG6000‐ i ‐MDI‐DMPA are similar to that of our PEG4000‐ i ‐MDI‐DMPA series reported earlier …”

Section: Resultssupporting

confidence: 82%

“…Poly(ethylene glycol) ( M n = 6000 g/mol) was purchased from the Johnson Matthey Company (London, UK) and the other materials are the same as we reported before …”

Section: Methodsmentioning

confidence: 99%

“…In our group, we have introduced carboxyl groups into polyurethane, which can easily form carboxylic dimers by hydrogen bonding . The carboxylic dimers contribute to the triple‐shape memory and pH‐induced shape memory properties in polyurethane.…”

Section: Introductionmentioning

confidence: 99%

“…In this paper, we aim to use the same carboxylic acid groups with hydrogen‐bonding interactions in polyurethane to achieve a self‐healing effect. A series of polyurethanes containing carboxyl groups were synthesized by the same method reported by our group before . In this study, poly(ethylene glycol) (PEG, M n = 6000 g mol −1 , called PEG6000) as the soft segments, 4,4′‐diphenylmethane diisocyanate (MDI), and dimethylol propionic acid (DMPA) as chain extender are used to synthesize polyurethanes PEG6000‐ i ‐MDI‐DMPA, where i = 20%, 30%, or 40%, representing the weight content of PEG6000 in the polymer.…”

Section: Introductionmentioning

confidence: 99%

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Thermally assisted self‐healing polyurethane containing carboxyl groups

Zhu¹,

Song

Chen

et al. 2017

J of Applied Polymer Sci

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Self‐healing polymer is a kind of intelligent material with the capability to repair damage automatically. In this paper, a type of polyurethane containing carboxyl groups is reported that demonstrates thermally assisted healing effects. This polymer can be healed even 72 h after cutting and also has a repeatable healing property. The self‐healing efficiency can reach 90% when comparing the tensile strength of the healed sample to the original sample. Carboxyl content plays an important role in the self‐healing property; polyurethane with no carboxyl groups cannot be healed. The mechanism of self‐healing showed that hydrogen bonding interactions between carboxyl groups and diffusion of poly(ethylene glycol) chains contribute to the self‐healing behavior. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 45929.

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Section: Resultssupporting

confidence: 82%

“…Poly(ethylene glycol) ( M n = 6000 g/mol) was purchased from the Johnson Matthey Company (London, UK) and the other materials are the same as we reported before …”

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Thermally assisted self‐healing polyurethane containing carboxyl groups

Zhu¹,

Song

Chen

et al. 2017

J of Applied Polymer Sci

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“…Shape memory polymers (SMPs) are another kind of significant intelligent material that has the capability of changing from a temporary shape to a permanent shape when subjected to external stimuli (like pH, heat, water, light, redox agents, etc.) . The stimuli‐responsive nature of SMPs enables them to have a wide range of potential applications ranging from sensors to biological and biomedical engineering .…”

Section: Introductionmentioning

confidence: 99%

Semi‐IPNs with Moisture‐Triggered Shape Memory and Self‐Healing Properties

Jiang

Xiao

Kang

et al. 2017

Macromol. Rapid Commun.

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Moisture or water has the advantages of being green, inexpensive, and moderate. However, it is challenging to endow water-induced shape memory property and self-healing capability to one single polymer because of the conflicting structural requirement of the two types of materials. In this study, this problem is solved through introducing two kinds of supramolecular interactions into semi-interpenetrating polymer networks (semi-IPNs). The hydrogen bonds function as water-sensitive switches, making the materials show moisture-induced shape memory effect. The host-guest interactions (β-cyclodextrin-adamantane) serve as both permanent phases and self-healing motifs, enabling further increased chain mobility at the cracks and self-healing function. In addition, these polyvinylpyrrolidone/poly(hydroxyethyl methacrylate-co-butyl acrylate) semi-IPNs also show thermosensitive triple-shape memory effect.

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Self‐Healing Materials for Energy‐Storage Devices

Mai

Han

et al. 2020

Adv Funct Materials

125

100

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The booming development of electronics, electric vehicles, and grid storage stations has led to a high demand for advanced energy‐storage devices (ESDs) and accompanied attention to their reliability under various circumstances. Self‐healing is the ability of an organism to repair damage and restore function through its own internal vitality. Inspired by this, brilliant designs have emerged in recent years using self‐healing materials to significantly improve the lifespan, durability, and safety of ESDs. Extrinsic and intrinsic self‐healing materials and their working principles are first introduced. Then, the application of self‐healing materials in ESDs according to their self‐healing chemistry, including hydrogen bonds, electrostatic interactions, and borate ester bonds, are described in detail. Based on these, critical challenges and important future directions of self‐healing ESDs are discussed.

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Thermo- and pH-sensitive shape memory polyurethane containing carboxyl groups

Abstract: A type of polyurethane with carboxylic acid, exhibits a thermo-induced triple-shape memory effect and a pH sensitive dual-shape memory effect.

Cited by 81 publications

References 37 publications

Thermally assisted self‐healing polyurethane containing carboxyl groups

Thermally assisted self‐healing polyurethane containing carboxyl groups

Semi‐IPNs with Moisture‐Triggered Shape Memory and Self‐Healing Properties

Self‐Healing Materials for Energy‐Storage Devices

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