One-pot synthesis of self-healable and recyclable ionogels based on polyamidoamine (PAMAM) dendrimers via Schiff base reaction

Zhao, Xiaomeng; Guo, Shufei; Li, Hao; Liu, Jiahang; Su, Cuiping; Song, Hongzan

doi:10.1039/c7ra06916b

Cited by 17 publications

(11 citation statements)

References 67 publications

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“…Considering that good mechanical properties are essential for the practical application of ionogels, the conventional matrix material, poly(vinylidene fluoride‐ co ‐hexafluoropropylene) (PVDF‐ co ‐HFP), was chosen as the polymer network to fabricate self‐healing ionogels with extreme strains while possessing an ionic conductivity of 10 −4 S cm −1 . Moreover, polyamidoamine (PAMAM) was also used to fabricate self‐healing ionogels via Schiff base reaction in ILs, which provided the novel ionogel with high ionic conductivity of 10 −2 S cm −1 and good tensile strength . However, the lower strain (about 40%) limited its application in flexible devices.…”

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confidence: 99%

A Highly Ionic Conductive, Healable, and Adhesive Polysiloxane‐Supported Ionogel

Wang

et al. 2019

Macromol. Rapid Commun.

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A new kind of polysiloxane‐supported ionogel is successfully designed via locking ionic liquids (ILs), 1‐ethyl‐3‐methylimidazolium bis(trifluoromethylsulfonyl)imide ([EMIM][Tf2N]), into poly(aminopropyl‐methylsiloxane) (PAPMS) grafted with [2‐(methacryloyloxy)ethyl] trimethylammonium chloride (METAC) in the presence of tannic acid (TA). The novel ionogel exhibits good mechanical and recovery properties, as well as high ionic conductivity (1.19 mS cm−1) at 25 °C. In addition, the totally physical dual‐crosslinked network based on ionic aggregates among METAC and the hydrogen bonds between PAPMS and TA provides excellent self‐healing ability, which allows the damaged ionogel to almost completely heal (≈83%) in 12 h at room temperature. Interestingly, the obtained ionogel also shows satisfactory adhesive behavior to various solid materials. Moreover, this novel ionogel can maintain its high ionic conductivity and recovery property even at subzero temperatures. Therefore, this polysiloxane‐supported ionogel is anticipated to be advantageous in flexible electronic devices such as sensors and supercapacitors, even at low temperatures.

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confidence: 99%

A Highly Ionic Conductive, Healable, and Adhesive Polysiloxane‐Supported Ionogel

Wang

et al. 2019

Macromol. Rapid Commun.

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“…Owing to its linear structure, H-PU exhibited liquid-like behavior (i.e., G′ < G″) over the whole range of available angular frequencies at 180 °C as shown in Figure 6 a. S-PU exhibited similar liquid-like behavior at high frequencies (G′ < G″), but its flow resistance dramatically increased with decreasing angular frequency. After the crossover point (where G′ = G″) at 1.62 rad/s, S-PU exhibited a solid-like property (G′ > G″), which implies the formation of a cross-linked gel-like structure [ 60 , 61 , 62 , 63 ]. This transition of S-PU from G′ < G″ to G′ > G″ at low frequencies was attributed to the exchange reaction accompanying the formation of gels.…”

Section: Resultsmentioning

confidence: 99%

Sorbitol as a Chain Extender of Polyurethane Prepolymers to Prepare Self-Healable and Robust Polyhydroxyurethane Elastomers

2018

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A self-healable polyhydroxyurethane (S-PU) was synthesized from sorbitol, a biomass of polyhydric alcohol, by a simple process that is suitable for practical applications. In the synthesis, only two primary hydroxyl groups of sorbitol were considered for the chain extension of the polyurethane (PU) prepolymers to introduce free hydroxyl groups in PU. As a control, conventional PU was synthesized by hexane diol mediated chain extension. Relative to the control, S-PU showed excellent intrinsic self-healing property via exchange reaction, which was facilitated by the nucleophilic addition of the secondary hydroxyl groups without any catalytic assistance and improved tensile strength due to the enhanced hydrogen bonding. We also investigated the effect of the exchange reaction on the topological, mechanical, and rheological properties of S-PU. The suggested synthetic framework for S-PU is a promising alternative to the conventional poly hydroxyurethane, in which cyclic carbonates are frequently reacted with amines. As such, it is a facile and environmentally friendly material for use in coatings, adhesives, and elastomers.

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“…The use of reversible non-covalent or dynamic covalent interactions in self-healing materials has received significant attention [76][77][78][79][80][81][82][83][84][85]. Although still in its early stages, studies into self-healing ion gels based on supramolecular and dynamic covalent chemistries have gradually increased in number in recent years [86][87][88][89][90]. For example, self-healing ion gels that exploit hydrogen bonding between hydrophilic ILs and biopolymers, such as guar gum [86] and functionalized agarose [87], have been reported.…”

Section: Self-healable Ion Gelsmentioning

confidence: 99%

“…For example, self-healing ion gels that exploit hydrogen bonding between hydrophilic ILs and biopolymers, such as guar gum [ 86 ] and functionalized agarose [ 87 ], have been reported. The formation of dynamic covalent bonds through Schiff-base reactions in ILs was used to form dendrimer-based self-healing ion gels [ 88 ]. Judicious combinations of low-molecular-weight gelators and ILs were also shown to realize self-healable ion gels through hydrogen bonding, π − π stacking, and interactions between alkyl chains [ 89 ].…”

Section: Self-healable Ion Gelsmentioning

confidence: 99%

Recent progress in self-healable ion gels

Tamate

Watanabe

2020

Science and Technology of Advanced Materials

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Ion gels, soft materials that contain ionic liquids (ILs), are promising gel electrolytes for use in electrochemical devices. Due to the recent surge in demand for flexible and wearable devices, highly durable ion gels have attracted significant amounts of attention. In this review, we address recent advances in the development of ion gels that can heal themselves when mechanically damaged. Light-and thermally induced healing of ion gels are discussed as stimuli-responsive healing strategies, after which self-healable ion gels based on supramolecular and dynamic covalent chemistry are addressed. Tough, highly stretchable, and selfhealable ion gels have recently been fabricated through the judicious design of polymer nanostructures in ILs in which polymer chains and IL cations and anions interact. The applications of self-healable ion gels to electrochemical devices are also briefly discussed.

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One-pot synthesis of self-healable and recyclable ionogels based on polyamidoamine (PAMAM) dendrimers via Schiff base reaction

Abstract: Novel ionogels with covalent polymeric networks based on polyamidoamine (PAMAM) dendrimers have been synthesized by the in situ crosslinking of amines via Schiff base reaction in the ionic liquid 1-ethyl-3-methylimidazolium acetate ([EMIM][OAc]).

Cited by 17 publications

References 67 publications

A Highly Ionic Conductive, Healable, and Adhesive Polysiloxane‐Supported Ionogel

A Highly Ionic Conductive, Healable, and Adhesive Polysiloxane‐Supported Ionogel

Sorbitol as a Chain Extender of Polyurethane Prepolymers to Prepare Self-Healable and Robust Polyhydroxyurethane Elastomers

Recent progress in self-healable ion gels

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