Aliphatic segmented poly(ether ester amide)s synthesized from hexanediamine, sebacic acid and poly(ethylene glycol)s

Zhao, Yanping; Zhao, Ji; Zhang, Zhiyuan; Zhang, Junying

doi:10.1007/s40242-016-5387-0

Cited by 7 publications

(4 citation statements)

References 23 publications

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“…The vibration band at 854 cm −1 can be assigned to the bending vibration of C−O of bicarbonate [41] . The infrared absorption peaks observed at 1025 cm −1 and 1271 cm −1 belong to the stretching vibration of C‐O [8,42] . In addition, the stretching vibration of C−N bond appears at 1440 cm −1 , which means that the photocatalytic coupling reaction of CO 2 and N 2 has taken place and the vibration intensity of C−N bond gradually increases with the reaction time [8] .…”

Section: Resultsmentioning

confidence: 99%

“…In addition, the stretching vibration of C−N bond appears at 1440 cm −1 , which means that the photocatalytic coupling reaction of CO 2 and N 2 has taken place and the vibration intensity of C−N bond gradually increases with the reaction time [8] . The vibration signals of carbonate and C=O appear at 1530 cm −1 and 1661 cm −1 , respectively [42–43] . The absorption peaks at 2771 cm −1 and 2855 cm −1 can be attributed to the stretching vibration of O−H in −COOH group [44] .…”

Section: Resultsmentioning

confidence: 99%

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Photocatalytic Co‐Reduction of N₂ and CO₂ with CeO₂ Catalyst for Urea Synthesis

Yang,

Zhang,

Pan

et al. 2023

Angew Chem Int Ed

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The effective conversion of carbon dioxide (CO2) and nitrogen (N2) into urea by photocatalytic reaction under mild conditions is considered to be a more environmentally friendly and promising alternative strategies. However, the weak adsorption and activation ability of inert gas on photocatalysts has become the main challenge that hinder the advancement of this technique. Herein, we have successfully established mesoporous CeO2‐x nanorods with adjustable oxygen vacancy concentration by heat treatment in Ar/H2 (90%:10%) atmosphere, enhancing the targeted adsorption and activation of N2 and CO2 by introducing oxygen vacancies. Particularly, CeO2‐500 (CeO2 nanorods heated treatment at 500 °C) revealed high photocatalytic activity toward the C‐N coupling reaction for urea synthesis with a remarkable urea yield rate of 15.5 μg/h. Besides, both aberration corrected transmission electron microscopy (AC‐TEM) and Fourier transform infrared (FT‐IR) spectroscopy were used to research the atomic surface structure of CeO2‐500 at high resolution and to monitor the key intermediate precursors generated. The reaction mechanism of photocatalytic C‐N coupling was studied in detail by combining Density Functional Theory (DFT) with specific experiments. We hope this work provides important inspiration and guiding significance towards highly efficient photocatalytic synthesis of urea.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Photocatalytic Co‐Reduction of N₂ and CO₂ with CeO₂ Catalyst for Urea Synthesis

Yang,

Zhang,

Pan

et al. 2023

Angew Chem Int Ed

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“…Polyamide 610 (PA610, H-[HN(CH 2 ) 6 NHCO(CH 2 ) 8 CO] n -OH) is widely used for automobile manufacturing [ 8 ], electronic [ 9 , 10 , 11 ], and machinery industries [ 12 , 13 , 14 ] applications, and for the production of a wide range of biological materials [ 15 , 16 ]. The main chain backbone of PA610 contains multiple carbonyl and secondary amino groups forming numerous intramolecular and intermolecular hydrogen bonds [ 17 ] that contribute to its crystalline structure [ 18 , 19 ].…”

Section: Introductionmentioning

confidence: 99%

Non-Isothermal Crystallization Kinetics of Montmorillonite/Polyamide 610 Nanocomposites

Huo

Liu

et al. 2023

Nanomaterials

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Non-isothermal crystallization kinetics of montmorillonite (MMT)/polyamide 610 (PA610) composites were readily prepared by in situ melt polymerization followed by a full investigation in terms of their microstructure, performance, and crystallization kinetics. The kinetic models of Jeziorny, Ozawa, and Mo were used in turn to fit the experimental data, in all of which Mo’s analytical method was found to be the best model for the kinetic data. Differential scanning calorimetry (DSC) and transmission electron microscopy (TEM) studies were used to investigate the isothermal crystallization behavior and MMT dispersion levels in the MMT/PA610 composites. The experiment results revealed that low MMT content can promote the PA610 crystallization, whilst high MMT content result in MMT agglomeration, and reduce the PA610 crystallization rate.

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“…Among the self-healing polymers using the D-A reaction, the D-A reaction between furan groups and maleimide groups to achieve self-healing is the most common system [5]. Therefore, this section will focus on the mechanism, reaction conditions and self-healing capacity of self-healing polymers in this system.…”

Section: Introduction and Comparison Of Selfhealing Polymersmentioning

confidence: 99%

Advances in the Diels-Alder Reaction in Self-Healing Polymeric Materials

Ren

2023

MATEC Web Conf.

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Polymeric functional materials are widely used in all aspects of everyday life. However, they are subject to a variety of environmental influences such as chemical attack, mechanical abrasion or impact and thermal decomposition, resulting in a significant shortening of the service life of polymer materials. Using traditional repair methods, the damaged part of the material is only reattached or reinforced at a macro level. Currently, more and more research is focused on smart composite materials with self-healing properties. This eliminates hidden problems in the use of the material, thereby extending its service life and broadening the range of applications. The Diels-Alder (DA) reaction is a [4+2] cycloaddition reaction between a conjugated diene and a substituted alkene. It has become a hot research topic in the field of self-healing due to its mild reaction conditions and lack of catalyst. In this paper, the progress of research on self-healing polymeric materials is reviewed with a focus on applications in DA reactions. The research progress in this field is reviewed based on the chemical structures of the prepared DA reaction-based polymers, and the development of DA reaction based self-healing polymers is investigated. Finally, the development of selfhealing polymers based on DA reactions is given as an outlook.

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Aliphatic segmented poly(ether ester amide)s synthesized from hexanediamine, sebacic acid and poly(ethylene glycol)s

Cited by 7 publications

References 23 publications

Photocatalytic Co‐Reduction of N₂ and CO₂ with CeO₂ Catalyst for Urea Synthesis

Photocatalytic Co‐Reduction of N₂ and CO₂ with CeO₂ Catalyst for Urea Synthesis

Non-Isothermal Crystallization Kinetics of Montmorillonite/Polyamide 610 Nanocomposites

Advances in the Diels-Alder Reaction in Self-Healing Polymeric Materials

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Aliphatic segmented poly(ether ester amide)s synthesized from hexanediamine, sebacic acid and poly(ethylene glycol)s

Cited by 7 publications

References 23 publications

Photocatalytic Co‐Reduction of N2 and CO2 with CeO2 Catalyst for Urea Synthesis

Photocatalytic Co‐Reduction of N2 and CO2 with CeO2 Catalyst for Urea Synthesis

Non-Isothermal Crystallization Kinetics of Montmorillonite/Polyamide 610 Nanocomposites

Advances in the Diels-Alder Reaction in Self-Healing Polymeric Materials

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Product

Resources

About

Photocatalytic Co‐Reduction of N₂ and CO₂ with CeO₂ Catalyst for Urea Synthesis

Photocatalytic Co‐Reduction of N₂ and CO₂ with CeO₂ Catalyst for Urea Synthesis