Self-healing polyurethane with high strength and toughness based on a dynamic chemical strategy

Dong, Faqin; Yang, Xinxin; Guo, Lizhen; Wang, Yuqi; Shaghaleh, Hiba; Huang, Zhen; Xu, Xu; Wang, Shifa; Liu, He

doi:10.1039/d2ta00802e

Cited by 103 publications

(65 citation statements)

References 60 publications

(75 reference statements)

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“…Overall, more attention should be paid to the utilization of leaves and stems of Zingiaceae in the future, which can not only prevent the waste of resources on leaves and stems, but also promote the research and development of a new, safer and more natural antibacterial agent [44,45]. They have the potential to replace chemical synthetic antibacterial agents and have high application value.…”

Section: Discussionmentioning

confidence: 99%

In Vitro Anti-Bacterial and Anti-Fungal Activities of Extracts from Different Parts of 7 Zingiberaceae Plants

Wu¹,

Li²,

Li³

et al. 2023

Journal of Renewable Materials

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This study aimed to explore the anti-bacterial and anti-fungal activities of extracts from different parts of plants in the Zingiberaceae family. The inhibitory rate, minimum inhibitory concentration (MIC), and minimum bactericidal concentration (MBC) of leaf and stem, and root and rhizome extracts from Alpinia katsumadai Hayata, Alpinia oxyphylla Miq × Alpinia henryi K. Schumann, Alpinia oblongifolia Hayata, Alpinia nigra (Gaertn.) Burtt, Amomum villosum Lour, Alpinia zerumbet (Pers.) Burtt. et Smith and Alpinia oxyphylla Miq were determined using the fungus cake method and double dilution method. The seven Zingiberaceae plants exhibited characteristic antibacterial activities against pathogenic bacteria and fungi. At a 1.5 mg mL −1 , A. zerumbet root and rhizome extracts exhibited strong inhibitory activity against S. aureus and E. coli, with 83.23% and 79.62%, respectively. In addition, A. zerumbet leaf and stem extracts had an inhibitory rate of 90.85% against P. aeruginosa. At the same concentration, the leaf and stem, root and rhizome extracts of A. katsumadai had the best antibacterial effect against F. oxysporum, with inhibition rates of 84.46% and 84.73%, respectively. Moreover, A. katsumadai and A. zerumbet leaf and stem extracts had the most significant antibacterial effect against S. aureus, with a MIC of 0.063 mg mL −1 . Thus, both A. katsumadai and A. zerumbet extracts had significant antibacterial activity. In addition, by comparing the inhibitory effect of extracts from different parts, it was found that the inhibitory rate and average inhibitory rate of extracts from leaf and stem were higher than those from root and rhizome. The chemical constituents of A. katsumadai and A. zerumbet, determined by the high-performance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS), revealed that citric acid (CA), alpinetin, and pinocembrin (PNCB) were the functional constituents yielding the antibacterial activity. Overall, A. katsumadai and A. zerumbet have the potential to be developed as new plant fungicides and bactericides. KEYWORDSZingiberaceae; pathogens; in vitro antibacterial activity; minimum inhibitory concentration (MIC); minimum bactericidal concentration (MBC); high-performance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS)

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Section: Discussionmentioning

confidence: 99%

In Vitro Anti-Bacterial and Anti-Fungal Activities of Extracts from Different Parts of 7 Zingiberaceae Plants

Wu¹,

Li²,

Li³

et al. 2023

Journal of Renewable Materials

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“…[32] The chemical structure of the resulting polymer was determined using the FT-IR technique. As shown in Figure 2a, typical peaks of polyurethanes were observed, for example, the peak at 3315 cm −1 is attributed to secoamine-N-H stretching, [33] and the peak appearing at 1550 cm −1 was due to the amide II band (-NH deformation vibration) [34] and at 1708 cm −1 there is a sharp absorption band corresponding to the C = O stretching frequency. [35] Importantly, no peak was observed at 2260 cm −1 , indicating that -NCO had completely reacted.…”

Section: Structure Characterizationsmentioning

confidence: 93%

Tannic Acid Crosslinked Self‐Healing and Reprocessable Silicone Elastomers with Improved Antibacterial and Flame Retardant Properties

Jiao

Rong

Gao

et al. 2022

Macromol. Rapid Commun.

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Silicone elastomers are widely used in aviation, electronics, automotive, and medical device fields, and their overuse inevitably causes recycled problems. In addition, the elastomers are subject to attack by bacteria and fire during use in some application scenarios, which is a safety hazard. Therefore, there is a great need to prepare silicone elastomers with improved antibacterial, flame retardant, self-healing, and recyclable functions. A new strategy is proposed to prepare silicone elastomers with bio-based tannic acid as cross-linkers to solve this problem by using polydimethylsiloxane as a soft chain segment and 2,2-bis(hydroxymethyl)propionic acid as an intermediate chain extender. Based on the phenol carbamate bonding and hydrogen bonding interactions, the elastomer has efficient self-healing ability and can achieve dynamic dissociation at 120 °C for complete recovery. In addition, due to the unique spatial structure and polyphenolic hydroxyl groups of tannic acid, the mechanical properties of the elastomer are greatly improved with an antimicrobial efficiency of over 90% and a final oxygen index of 25.5%. The multifunctional silicone elastomer has great potential applications in recyclable refractory materials and antimicrobial materials.

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“…Nevertheless, there is an inherent trade-off between tensile properties and dynamic self-healing in most dynamic-crosslinked self-healing materials: strong interactions lead to robust properties but a lack of dynamics, which hinders spontaneous healing, whereas weak interactions provide efficient healing but result in relatively soft and low-strength materials. , Furthermore, the self-healing of these materials can only occur under an external input of energy (such as heat, light, and irradiation) or an additional stimulus (such as pH, heat, light, catalyst, and solvent). , These two factors substantially affect applications; therefore, the challenge remains of designing and preparing robust elastic materials with self-healing capacities at room temperature without an external stimulus, although several kinds of self-healing materials with high tensile strength have been developed. − …”

Section: Introductionmentioning

confidence: 99%

Efficient, Room-Temperature Self-Healing Polyurethane Elastomers with Superior Tensile Properties and Solvatochromic Capacities

Teng

Liu

et al. 2022

ACS Appl. Polym. Mater.

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Designing a polymeric elastomer that exhibits superior tensile properties, as well as efficient self-healing ability at mild temperatures, remains challenging. This study reports a polyurethane elastomer that contains imine and metal coordination bonds, by a facile method. The linear polyurethane (HPPU), bearing pendant ligands of phenolic oxygen and imine groups, originates via two-step polycondensation of hexamethylene diisocyanate, polytetrahedrofuran, and 2-{[(2-hydroxyphenyl) methylene]amino}-1,3-propanediol. Upon incorporation of Co(II) into the polymeric matrix, HPPU becomes an elastomer (HPPU-Co) with a physical crosslinked structure by the formation of metal coordination bonds. The dynamic reversible Co(II)−ligand coordination bonds in the structure impart the HPPU-Co elastomers with autonomous self-healing capacity at mild temperatures, and the tensile properties are adjustable by controlling the Co(II)/ligand ratio. When the mole ratio of Co(II)/ligand is 1:2, the as-prepared elastomer (HPPU-Co-1/2) exhibits superior tensile properties (ultimate tensile strength: 48.7 MPa; elongation at break: 1678%; fracture toughness: 287.7 MJ m −3 ) as well as self-healing abilities and repeated healing at room temperature [healing efficiency: 99.7% for the first healing and 81.2% for the sixth healing (24 h)]. Furthermore, the HPPU-Co elastomers exhibit reversible solvatochromic behaviors: the film color changes from blackish-green to red-brown upon dipping into water. The design concept in this work is an approach to preparing multifunctional polyurethane materials. The resultant polyurethane elastomers have multiple useful features and show promise for many fields that require long functional lifetimes.

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Self-healing polyurethane with high strength and toughness based on a dynamic chemical strategy

Abstract: Menthane diamine promotes the strength and toughness of H-bonding and disulfide bonding-based self-healing polyurethane elastomers and simultaneously improves the elasticity and self-healing performance.

Cited by 103 publications

References 60 publications

In Vitro Anti-Bacterial and Anti-Fungal Activities of Extracts from Different Parts of 7 Zingiberaceae Plants

In Vitro Anti-Bacterial and Anti-Fungal Activities of Extracts from Different Parts of 7 Zingiberaceae Plants

Tannic Acid Crosslinked Self‐Healing and Reprocessable Silicone Elastomers with Improved Antibacterial and Flame Retardant Properties

Efficient, Room-Temperature Self-Healing Polyurethane Elastomers with Superior Tensile Properties and Solvatochromic Capacities

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