Multi-stimuli responsive and multi-functional oligoaniline-modified vitrimers

Chen, Qiaomei; Yu, Xiaowen; Pei, Zhiqiang; Yang, Yang; Wei, Yen; Ji, Yan

doi:10.1039/c6sc02855a

Cited by 193 publications

(134 citation statements)

References 73 publications

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“…One issue relates to making large, even, and defect free films on transparent electrodes that are sufficient for device applications. [17][18][19][20][21] Introducing oligoanilines in a variety of polymeric architectures can endow them with attractive electroactivity and stimuli-responsiveness, while featuring superior solubility, processability, and tunability. This should result in a robust silica/organic composite with characteristics determined by the electroactive units chosen.…”

Section: Introductionmentioning

confidence: 99%

Flexible and Robust Electro‐Optically Responsive Films Based on Novel Silica/Oligoaniline/Carbon Dots Composite

Zhou

Berda

et al. 2019

ChemElectroChem

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We report a new electro-optical composite film based on silica, oligoaniline, and carbon dots prepared by a hydrolytic crosslinking reaction under electrokinetic potentials. The electroactive oligoaniline and fluorescent carbon dots are covalently linked through hydrolysis of siloxane, resulting in multifunctional composite films. The resultant crosslinked architecture endows the films with high flexibility and robust durability. These films display good electrochromic behavior with an obvious color contrast, quick switching rate, and acceptable cycling stability. Moreover, these films reveal an interesting electrofluorochromic performance in continuous potential ranges, attributed to the interaction between oligoaniline and carbon dots, and the change in structure that occurs with changing redox potentials. Further, an enhanced photocurrent response is observed in these materials, as a result of the organic-inorganic interfaces.

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Section: Introductionmentioning

confidence: 99%

Flexible and Robust Electro‐Optically Responsive Films Based on Novel Silica/Oligoaniline/Carbon Dots Composite

Zhou

Berda

et al. 2019

ChemElectroChem

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“…Vitrimers are not traditional cross‐linked polymer networks, in which dynamic chemical bonds are introduced, leading to rearrange their topology via thermally triggered exchange reactions without changing the cross‐link density . Thus, dynamic chemical bonds not only realize the reprocessing of thermosetting material but also endow it with some excellent properties, such as multishape memory, healing, and surface welding, which is an amazing breakthrough for welding technology of thermosets. However, most of the vitrimers require some special processing conditions that hindered its practical application during the surface welding in order to get a perfect effect of contact between the surfaces.…”

Section: Introductionmentioning

confidence: 99%

Carbon Nanotubes‐Polyurethane Vitrimer Nanocomposites with the Ability of Surface Welding Controlled by Heat and Near‐Infrared Light

Yan

Zhao

Wang

et al. 2017

Macro Chemistry & Physics

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Welding technology of polymer materials, serving as an exceedingly good tactics to save materials, reduce cost, and reduce material loss, is only extensively applied in thermoplastic materials for the moment. Recently, a new class of polymer, known as vitrimer, has attracted the eye of researchers because it realizes the reprocessing and reshape of thermosets and possesses many excellent functions, such as multishape memory, healing, and surface welding. Among these, the vitrimer makes the surface welding of thermosetting material possible. In this paper, carbon nanotubes‐polyurethane vitrimer nanocomposites with the capability of surface welding controlled by heat and near‐infrared (NIR) light are successfully prepared. Here, the effects of surface welding are characterized by lap shear tests and optical microscope. In addition, from the control experiments, it is found that the shear strength of the light‐welding sample under NIR illumination for 1 min is greater than that of the heat‐welding sample at 110 °C for 10 min. Furthermore, thermosetting polyurethane has been applied in many fields, and it is hoped that the findings, especially near‐infrared welding technology, will make some contributions for welding technology of polymer.

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“…On the other hand, in the case of associative CANs, a cross‐linking bond does not break until a new bond forms, which makes the network permanent and dynamic. Vitrimers are polymeric associative covalent adaptive networks that exhibit a gradual viscosity decrease upon heating, which is a distinctive character of vitreous silica. The cross‐linking bonds of such networks have an associative nature which results in the ability of the material to change its topology via exchange reactions.…”

Section: Selected Fast Self‐healing Systems For Mechanical Property Rmentioning

confidence: 99%

“…Alternative self‐healing methods have been proposed for vitrimers with the addition of functional materials into vitrimers. Organoaniline was added into epoxy vitrimer and self‐healing was triggered by near infrared (NIR) radiation . In this case, organoaniline absorbed NIR and produced the required heat for self‐healing.…”

Section: Selected Fast Self‐healing Systems For Mechanical Property Rmentioning

confidence: 99%

Ultra‐Fast Microwave Assisted Self‐Healing of Covalent Adaptive Polyurethane Networks with Carbon Nanotubes

Bonab

Karimkhani

Manas‐Zloczower

2018

Macro Materials & Eng

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Vitrimers are a class of covalent adaptive networks which, unlike other covalent networks, can be thermally reprocessed, recycled, and are self‐healing. In this research, a polyurethane vitrimer network is prepared using 1,4‐phenylene diisocyanate and excess amount of polycaprolactone polyol. The dynamic nature of this network is provided by a dual effect of dynamic transesterification reactions as well as dynamic transcarbamoylation reactions. This vitrimer can be reshaped, be recycled, and heal potential defects at high enough temperatures. A fast healing strategy is developed by the addition of small amounts (0.05 wt%) of carbon nanotubes (CNTs) which enables the use of microwave radiation for an efficient fast healing process. Using this strategy the healing time decreases more than 30 times compared to using a conventional oven. CNTs also enhance the vitrimer mechanical properties and compensate for the mechanical property loss of the dynamic PU network in comparison to the permanent PU network.

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Multi-stimuli responsive and multi-functional oligoaniline-modified vitrimers

Abstract: Introducing oligoaniline into a vitrimer resulted in a smart material that simultaneously responds to six different stimuli and performs six different functions.

Cited by 193 publications

References 73 publications

Flexible and Robust Electro‐Optically Responsive Films Based on Novel Silica/Oligoaniline/Carbon Dots Composite

Flexible and Robust Electro‐Optically Responsive Films Based on Novel Silica/Oligoaniline/Carbon Dots Composite

Carbon Nanotubes‐Polyurethane Vitrimer Nanocomposites with the Ability of Surface Welding Controlled by Heat and Near‐Infrared Light

Ultra‐Fast Microwave Assisted Self‐Healing of Covalent Adaptive Polyurethane Networks with Carbon Nanotubes

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