Recent advances in high-strength and high-toughness polyurethanes based on supramolecular interactions

Xu, Jing; Wang, Xiaoyue; Ruan, Hongwei; Zhang, Xinrui; Zhang, Yaoming; Yang, Zenghui; Wang, Qihua; Wang, Tingmei

doi:10.1039/d2py00269h

Cited by 41 publications

(31 citation statements)

References 186 publications

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“…The strong hydrogen bonds come from the self-complementary quadruple hydrogen bond interactions between the UPy dimers introduced into the main chain. 63,64 In addition to the selfhealing ability, the introduction of strong hydrogen bonds will affect the tensile properties, and weak hydrogen bonds generally play a role in energy dissipation. The mechanical properties and self-healing abilities of PU materials combined with dynamic covalent bonds and hydrogen bonds are summarized in Table 1.…”

Section: Combining Dynamic Covalent Bonding and Hydrogen Bondingmentioning

confidence: 99%

Recent advances in self-healing polyurethane based on dynamic covalent bonds combined with other self-healing methods

Kang

Xue

et al. 2023

Nanoscale

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Section: Combining Dynamic Covalent Bonding and Hydrogen Bondingmentioning

confidence: 99%

Recent advances in self-healing polyurethane based on dynamic covalent bonds combined with other self-healing methods

Kang

Xue

et al. 2023

Nanoscale

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“…Polyurea has attracted considerable attention in the fields of protection, ballistic proof, and blast , owing to its high strength, high toughness, and strain-rate-dependent behavior properties, − which are profoundly affected by their structures . Designing supramolecular polymer networks is an approach to fabricating a protective polyurea material with excellent mechanical properties and various functions, − such as self-healing − and shape memorability .…”

Section: Introductionmentioning

confidence: 99%

Room-Temperature Self-Healing Polyurea with High Puncture and Impact Resistances

Zhang

Cheng

et al. 2023

Chem. Mater.

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Polyureas are widely used as protective materials because they have good mechanical strength, toughness, and strainrate-dependent behavior. However, the fast reaction between −NCO and the −NH 2 component results in gelation in seconds, limiting their performance regulation and applications. In this study, we report a novel strategy to fabricate one-component polyurea with room-temperature self-healing, puncture resistance, and impact resistance. First, a latent curing agent was synthesized via the Schiff base reaction of an aliphatic diamine with isobutyraldehyde. Then, they were mixed directly with isocyanate. Such a mixture was uncured in storage without moisture, but it was cured once in contact with moisture in the application. So, it was called one-component polyurea. The polyurea exhibits roomtemperature self-healing properties with a healing efficiency of up to 98%. It has puncture displacement as high as 15.1 cm by sharp objects. The polyurea also exhibits excellent impact resistance and dissipative energy capacity because it possesses strain-ratedependent behavior. The polyurea can be integrated into Kevlar fabrics to form a flexible puncture-resistant composite and combined with carbon nanotubes to form flexible and wearable strain sensors. It is expected to find applications in intelligent soft materials, soft body armor, wearable flexible sensors, and other fields.

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“…The first is a chemical method which utilizes polyisocyanates and polyols to either introduce high energy covalent bonds, or increase the density of non-covalent bonds within PU structures. 7,8 The second is a physical method, which uses different reinforcing fillers to improve the mechanical properties of PU. [9][10][11] Nanoparticles are considered an ideal reinforcing filler due to their high strength, stiffness and "nano effect," 12 while a small addition has been shown to effectively improve the mechanical properties of PU.…”

Section: Introductionmentioning

confidence: 99%

Study on the preparation and performance of SiC nanoparticle reinforced polyurethane coatings

Zhang

Chang

Jin

et al. 2023

J of Applied Polymer Sci

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Polyurethane (PU) coatings display several advantages such as easy construction, adjustability, and excellent mechanical properties, and therefore have potential applications in the coating of rocket engines and warheads. However, mechanical strength, high ductility and thermal stability are often difficult properties to combine, which has become a key limitation in efforts toward developing PU coatings for these applications. In this paper, a fast‐curing PU film was developed by reacting between polytetrahydrofuran and diphenylmethane 4,4'‐diisocyanate. The mechanical strengthening effect of SiC nanoparticles on the film was studied and compared with other common fillers, including TiO2, XFM13. The results revealed that SiC nanoparticles substantially increased the mechanical properties in PU coating, increasing the material's tensile strength and elongation at break to 34.14 MPa and 434% respectively. In addition, the inclusion of SiC nanoparticles generally improved the thermal stability and low temperature resistance of PU film. The results generated in this research has established a foundation for the application of PU materials in fields requiring high performance properties, such as rocket engines coatings and warhead manufacture.

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Recent advances in high-strength and high-toughness polyurethanes based on supramolecular interactions

Abstract: Recent developments in supramolecular chemistry have generated increasing interest in supramolecular polymers and opened a window for the exploitation of various supramolecular polymeric materials and their multifunctional composites. High-performance polyurethanes,...

Cited by 41 publications

References 186 publications

Recent advances in self-healing polyurethane based on dynamic covalent bonds combined with other self-healing methods

Recent advances in self-healing polyurethane based on dynamic covalent bonds combined with other self-healing methods

Room-Temperature Self-Healing Polyurea with High Puncture and Impact Resistances

Study on the preparation and performance of SiC nanoparticle reinforced polyurethane coatings

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