Shape memory property and mechanism of the knitting-fabric reinforced epoxy composites subjected to tensile loading

Ren, Haipeng; Ouyang, Yiwei; Xiao, Shili; Xu, Weilin; Liu, Y.

doi:10.1016/j.compscitech.2022.109764

Cited by 18 publications

(7 citation statements)

References 33 publications

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“…These efforts aim to enhance the temperature range, response speed, and cycle life of SMPCs 15–17 . In this context, textile materials provide a broader and more diverse range of possibilities for the applications of SMPCs 18–20 …”

Section: Introductionmentioning

confidence: 99%

Shape memory polymer composite fabrics with high recovery force and excellent electrothermal drive deformability

Liu,

Yang,

et al. 2024

Polymer Composites

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Fabric‐reinforced shape memory polymer composites are lightweight, strong, formable, controllable, and suitable for various engineering and innovative applications. This study aims to fabricate and characterize electrothermal dual drive shape memory polymer composite fabrics (SMPCFs) of different densities with three‐dimensional (3D) angle‐interlock structures. The tensile properties, electrothermal properties, recovery forces (both tensile and bending), and shape recovery properties of SMPCFs were evaluated. The SMPCFs exhibited a tensile elongation of over 20% at the transition temperature. SMPCFs can reach transition temperatures when loaded with 2 V. The recovery forces are up to 225 N in tensile recovery force and 3.6 N in bending recovery force. In the shape recovery test, the recovery ratio exceeded 97%. Finally, the demonstration of recovery properties can stimulate the possibilities of SMPCFs in innovation and applications.Highlights Core‐shell structured composite filaments were prepared. 3D angle‐interlock composite fabrics: high strength, electrothermal drive. Tensile recovery force of composite fabrics can be up to 225 N. Elongation at transition temperatures was up to 20%.

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Section: Introductionmentioning

confidence: 99%

Shape memory polymer composite fabrics with high recovery force and excellent electrothermal drive deformability

Liu,

Yang,

et al. 2024

Polymer Composites

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“…Consequently, the mixing of epoxies with other materials has emerged as an attractive way to impart additional properties and has been widely adopted. Using this strategy, epoxy-based elastomers with remarkable flexibility have been successfully developed, with applications in sensors, smart fabrics, nanocomposites, , thermally conductive composite materials, and so on. , …”

Section: Introductionmentioning

confidence: 99%

“…10 Consequently, the mixing of epoxies with other materials has emerged as an attractive way to impart additional properties and has been widely adopted. Using this strategy, epoxy-based elastomers with remarkable flexibility have been successfully developed, with applications in sensors, 11 smart fabrics, 12 nanocomposites, 13,14 thermally conductive composite materials, 15 and so on. 16,17 In the early stages of research, epoxy-based elastomers were prepared by blending elastomers 14,18,19 or polydimethylsiloxane (PDMS) 20 with epoxy resins, in order to enhance and control material properties such as strength, stiffness, and polarity.…”

Section: ■ Introductionmentioning

confidence: 99%

Correlation between the Structural Variations in Thiol-Based Hardeners and Properties of Thiol–Epoxy Polymers

Kim,

Yu,

Kwon

et al. 2023

ACS Appl. Polym. Mater.

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Epoxy-based elastomers with remarkable flexibility have garnered attention due to their versatility in various applications, including sensors, smart fabrics, nanocomposites, and thermally conductive composite materials. In these studies, the selection of an appropriate hardener is crucial to imparting elastomeric properties to epoxy. Among the various available hardeners, thiol-based hardeners present notable advantages. First, they facilitate rapid curing at low temperatures via an epoxy–thiol click reaction. Second, the flexibility of the C–S bonds enables glass transition near room temperature. Despite these merits, the utilization of thiol-based hardeners in epoxy elastomer materials remains limited, primarily due to the lack of a well-established structure–property relationship between the thiol hardeners and epoxy elastomers. In this study, we carefully examined the effect of the hardener structure on the properties of thiol–epoxy polymers. While maintaining the structure of a tetrafunctional thiol as a cross-linker, we varied the structure of a bifunctional thiol to analyze its influence on the physical properties of the resulting thiol–epoxy material. Factors such as the presence or absence of an oxygen atom, the existence of a ring structure, the presence or absence of aromatics, and the geometric shape of the hardener all influenced the mechanical properties, such as modulus, stress, and toughness. Notably, the structure of the bifunctional hardener allowed precise control over the glass transition temperature of the thiol–epoxy material near room temperature, resulting in distinct mechanical behaviors (elastic or plastic) at room temperature. Based on these findings, we successfully developed a thiol–epoxy material exhibiting elastomeric behavior at room temperature and shape memory characteristics at temperatures close to room temperature (e.g., 40 °C).

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“…[21][22][23] Compared with carbon fiber, glass fiber has a higher cost performance. Ren et al 24 studied the mechanical properties of epoxy resin reinforced by glass fiber in the direction of 0 and 90 , and the study showed that the tensile recovery force in the direction of 90 was the largest. Jenarthanan et al 25 prepared glass fiberreinforced epoxy resin composites by handpaste.…”

mentioning

confidence: 99%

“…Ren et al. 24 studied the mechanical properties of epoxy resin reinforced by glass fiber in the direction of 0° and 90°, and the study showed that the tensile recovery force in the direction of 90° was the largest. Jenarthanan et al.…”

mentioning

confidence: 99%

Effect of silane coupling agent modification on shape memory behavior and mechanical properties of knitting fabric reinforced composites

Huang,

Ren,

et al. 2024

Textile Research Journal

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Continuous glass fiber fabrics can improve the shortcomings of shape memory polymers in terms of mechanical properties. However, the mechanical properties of shape memory composites will not be optimal if the interface between the glass fibers and the matrix is poorly bonded. The purpose of this study is to explore the thermomechanical properties and shape memory behavior of shape memory epoxy resin and composites before and after the chemical modification of glass fiber. The effects of the ratios of epoxy to curing agent and whether the knitting fabrics are modified with silane coupling agent on the properties of the composites are investigated. The results show that the thermal decomposition temperature and glass transition temperature of the shape memory epoxy polymers increase with the increasing mass ratio of diaminodiphenylmethane. The shape fixing ratios and shape recovery ratios of the knitting fabric reinforced composites with different mass contents and silane coupling agent modification are above 98.0% at 18.0% tensile strain. After 10 cycles, the shape memory performance of the composites modified with KH560 is still good. Besides, the addition of silane coupling agent to the composites can reduce the shape recovery time by 17.9% and increase the recovery force with 30.0% subjected to 18.0% tensile strain. The tensile strength of the shape memory composites modified with silane coupling agent can increase 32.8% as compared with that of the composites without modification.

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Shape memory property and mechanism of the knitting-fabric reinforced epoxy composites subjected to tensile loading

Cited by 18 publications

References 33 publications

Shape memory polymer composite fabrics with high recovery force and excellent electrothermal drive deformability

Shape memory polymer composite fabrics with high recovery force and excellent electrothermal drive deformability

Correlation between the Structural Variations in Thiol-Based Hardeners and Properties of Thiol–Epoxy Polymers

Effect of silane coupling agent modification on shape memory behavior and mechanical properties of knitting fabric reinforced composites

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