Multifaceted bioinspired hyperbranched polyurethane nanocomposite as a non-contact triggered self-healing material

Duarah, Rituparna; Deka, Ajit; Karak, Niranjan

doi:10.3144/expresspolymlett.2020.44

Cited by 7 publications

(3 citation statements)

References 36 publications

(50 reference statements)

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“…[14]when f-SNP materials are uniformly dispersed in HPU, the polar functionality of f-SNP interact with HPU matrix resulting in stiffness and successful load transfer from HPU matrix to the nanomaterials in the composite leading to high toughness of the material. [20] By incorporation of sacrificial bond through polymerization with triple network of molecules in elastomers, elastomers are toughened and have high stretch ability. [32] Hardness: Surface hardness in the coatings is sought to provide a protective layer against mechanical damage.…”

Section: Mechanical Propertiesmentioning

confidence: 99%

Review Study on Mechanical Properties of Self-Healing materials

Pattanaik¹,

Mishra²

2022

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Self-healing materials as the name suggest these materials can self-heal themselves. Self-healing materials is the need of the future. It has a most prominent and effective pplication in the field of aerospace, but it is not limited to the aerospace industry. Concrete cement being the cheapest also has the application of self-healing agents that leads to the replenishment of cracks easily so that the life span of the concrete increases furthermore. Another prominent field where self-healing materials have a wide application is ESDs electronic storage devices because of the sensitivity of ESDs. Not only restricted to ESDs it is also planned to be used in robots as the chances of wear and tear are more and is skin sensitive. Further in this review, mechanical properties such as strength, toughness, hardness, and fatigue are discussed.

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Section: Mechanical Propertiesmentioning

confidence: 99%

Review Study on Mechanical Properties of Self-Healing materials

Pattanaik¹,

Mishra²

2022

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“…ductility [4,5], impact resistance [6,7] or fire retardancy [8,9]), they can be endowed with additional functionalities that can increase their advantage over competing structural materials. The additional functions can range from self-healing [10,11] to integrated health monitoring [12,13], but the coupled behaviour of composites might be the most fundamental of all. Coupling refers to a direct connection between loads and deformations of different modes (e.g.…”

Section: Introductionmentioning

confidence: 99%

Multi-Parameter Layup Optimization and the Effect of Layup Homogenization on the Bending Compliance Matrix of Coupled Composites

Czigány

Vermes

2022

Period. Polytech. Mech. Eng.

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The behaviour of fibre-reinforced composites greatly depends on their layup structures. Through a full-field layup optimization study based on multiple parameters, this paper investigates how different properties change with the layup. The aim was to maximize the extension-twist coupling performance while ensuring adequate bending stiffness and low thermal warpage to make the laminate suitable for shape-adaptive helicopter rotor blade application. The Classical Laminate Theory-based calculations revealed that satisfying the bending compliance and thermal warpage criteria significantly limited the achievable extension-twist performance. The warpage limit affected the desired coupling behaviour more because both properties are driven by terms in the extensional-bending compliance matrix, unlike bending compliance. Symmetric laminates do not have an intrinsic extension-twist capability, but some asymmetric laminates demonstrated significant coupling performance while being practically warpage-free (based on the ISO2768 standard). The results prove that the advantages of asymmetric laminates can outweigh their sometimes negligible disadvantages. The paper also investigates if there is a universal tendency in how layup homogenization affects the terms of the bending compliance matrix of composites. Through analytical calculations, we showed that depending on the layup of the sub-laminate, homogenization can increase or reduce the value of any term in the bending compliance matrix; therefore, there is no universal tendency. Based on these results, layup homogenization cannot only be exploited for its most general purpose – warpage mitigation – but also for improving other characteristics of the laminate (e.g. reducing the bending compliance for increased bending stiffness or increasing the bend-twist compliance for improved coupling performance).

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“…According to the healing mechanism, self-healing polymers are classified into autonomous and nonautonomous systems in which the damages are healed without and with the assistance of external stimuli, respectively. Such external stimuli as microwave irradiation, 10,11 UV-Visible irradiation, 12,13 heat, 14,15 magnetic field, 16 pH, 17 and addition of organic solvents 18 have been used for healing. These stimuli require energy consumption, addition of active chemical reagents and chemical modification of polymer chains.…”

Section: Introductionmentioning

confidence: 99%