Recyclable and self-healing polyurethane composites based on Diels-Alder reaction for efficient solar-to-thermal energy storage

Yang, Shenghai; Du, Xiaosheng; Deng, Sha; Qiu, Jinghong; Du, Zongliang; Cheng, Xu; Wang, Haibo

doi:10.1016/j.cej.2020.125654

Cited by 169 publications

(80 citation statements)

References 47 publications

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“…Going further, retro Diels-Alder has never been revealed for chitosan-based compounds even if its use has been recognized for many applications such as self-healing of various polymers (Gandini et al, 2018) (Vauthier et al, 2019) (Yang et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Diels-Alder-Chitosan based dissociative covalent adaptable networks

Chapelle

Quienne

Bonneaud

et al. 2021

Carbohydrate Polymers

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Four different films were prepared from chitosan modified with furfuryl glycidyl ether (FG) by Diels Alder reaction with different maleimide-based cross linker. At first, a preliminary study led to structural identification and better understanding of the reaction. For the first time, Diels-Alder and retro Diels-Alder reactions were evidenced by NMR spectroscopy and DSC on chitosan based systems. Then, chitosan of 30,000 g/mol and 150,000 g/mol were modified by FG with 20% substitution degree (DS). The resulting products were then crosslinked with bis and trimaleimide cross-linkers to produce films possessing interesting mechanical properties. For the first time for chitosan-based films, DMA measurement highlighted retro Diels-Alder between 110 and 130°C. Film also showed interesting hydrophobicity and fat absorption. They also exhibited resistance in acidic media whereas crude chitosan films were destroyed.

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Section: Introductionmentioning

confidence: 99%

Diels-Alder-Chitosan based dissociative covalent adaptable networks

Chapelle

Quienne

Bonneaud

et al. 2021

Carbohydrate Polymers

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show abstract

“…[11][12][13] The extrinsic self-healing materials generally require repairing agents stored in pre-embedded microcapsules or microvascular networks to achieve the self-healing process, showing a drawback of single/few-time healing with the exhaustion of repairing agents. [14][15][16] In contrast, the intrinsic self-healing materials can achieve repeated repair without external repairing agents by dynamic reversible covalent bonds and non-covalent interactions, such as hydrogen bond, 17,18 supramolecular interaction, 19,20 metal-ligand interaction, 21 p-p interaction, 22 Diels-Alder chemistry, 23 host-guest interactions, 24 and disulde bond exchange. [25][26][27] Recently, aromatic disulde bonds have been determined to be a promising reversible bond to achieve self-healing at room temperature owing to their low bond dissociation energy and stable free radicals.…”

Section: Introductionmentioning

confidence: 99%

Bioinspired modified graphene oxide/polyurethane composites with rapid self-healing performance and excellent mechanical properties

et al. 2021

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“…Similar findings were observed for PWPU 5000 ( Figure S10 ), indicating excellent recyclability of PWPU. Although other research groups recycled waterborne polyurethane by hot-pressing [ 37 ], solution casting [ 11 ] (dissolved by DMF or other high-boiling organic solvents) and other traditional polymer-processing methods [ 38 ], these methods typically have to be implemented accompanied by negative effects, such as operational difficulty, high-cost, environmental pollution and health hazards. Tensile strength and breaking elongation were significantly reduced after recycling multiple times.…”

Section: Resultsmentioning

confidence: 99%

Recyclable Shape-Memory Waterborne Polyurethane Films Based on Perylene Bisimide Modified Polycaprolactone Diol

Kang

Zhang

et al. 2021

Polymers

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Currently, much attention is given to the functionality and recyclability of waterborne polyurethane (WPU). Herein, ε-caprolactone was used as a chain extender for grafting onto perylene bisimide (PBI) and 1,4-butanediol (BDO) via ring-opening reactions to obtain PBI-PCL and BDO- PCL. Then, two kinds of WPU, namely PBI-WPU (PWPU) and BDO-WPU (BWPU), were fabricated using PBI-PCL/polytetrahydrofuran ether glycol (PTMG) and BDO-PCL/PTMG, respectively, as mixed soft segments. The properties and appearance of PWPU and BWPU emulsions were analyzed in terms of particle size, zeta potential and TEM images, and the results showed that PWPU emulsions had uniform particle size distribution and decent storage stability. AFM and DMA results revealed that PWPU films possessed a more significant degree of microphase separation and a higher glass transition temperature (Tg) than BWPU films. The PWPU films displayed good shape-memory and mechanical properties, with tensile strength up to 58.25 MPa and elongation at break up to 1241.36%. TGA analysis indicated that PWPU films had better thermal stability than BWPU films. More importantly, the PWPU films could be dissolved in a mixed solvent of acetone/ethanol (v/v = 2:1) at room temperature. The dissolved PWPU could be dispersed in deionized water to prepare waterborne polyurethane again. After the recycling process was repeated three times, the recycled PWPU emulsion still exhibited good storage stability. The recycled PWPU films maintained their original thermal and mechanical properties. Comparing the properties of BWPU and PWPU showed that the soft segment structure had important influence on waterborne polyurethane performance. Therefore, PWPU may have great potential applications in making recycling and shape-memory coating or paint.

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Recyclable and self-healing polyurethane composites based on Diels-Alder reaction for efficient solar-to-thermal energy storage

Cited by 169 publications

References 47 publications

Diels-Alder-Chitosan based dissociative covalent adaptable networks

Diels-Alder-Chitosan based dissociative covalent adaptable networks

Bioinspired modified graphene oxide/polyurethane composites with rapid self-healing performance and excellent mechanical properties

Recyclable Shape-Memory Waterborne Polyurethane Films Based on Perylene Bisimide Modified Polycaprolactone Diol

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