Effects of modified carbon nanotubes with different sizes on properties of epoxy shape memory polymers

Tang, Longhao; Wang, Yanling; Li, Qiang

doi:10.1002/pc.26032

Cited by 6 publications

(5 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Tang et al [ 91 ] studied the shape-memory performance of ER/MWCNT composites with different diameters, namely 8–15 nm (50 μm length) and 30–50 nm (10–20 μm length), observing that smaller CNT diameters were more effective at increasing the composite’s tensile strength and elongation at break. For lower diameter MWCNT at 1 wt.%, it was possible to achieve a faster recovery speed with a high

; in contrast, MWCNT with a larger diameter contributed to enhancing the heat resistance.…”

Section: Thermal Actuation Of Smp With Cntmentioning

confidence: 99%

Shape-Memory Polymers Based on Carbon Nanotube Composites

da Silva,

Proença,

Covas

et al. 2024

Micromachines

View full text Add to dashboard Cite

For the past two decades, researchers have been exploring the potential benefits of combining shape-memory polymers (SMP) with carbon nanotubes (CNT). By incorporating CNT as reinforcement in SMP, they have aimed to enhance the mechanical properties and improve shape fixity. However, the remarkable intrinsic properties of CNT have also opened up new paths for actuation mechanisms, including electro- and photo-thermal responses. This opens up possibilities for developing soft actuators that could lead to technological advancements in areas such as tissue engineering and soft robotics. SMP/CNT composites offer numerous advantages, including fast actuation, remote control, performance in challenging environments, complex shape deformations, and multifunctionality. This review provides an in-depth overview of the research conducted over the past few years on the production of SMP/CNT composites with both thermoset and thermoplastic matrices, with a focus on the unique contributions of CNT to the nanocomposite’s response to external stimuli.

show abstract

; in contrast, MWCNT with a larger diameter contributed to enhancing the heat resistance.…”

Section: Thermal Actuation Of Smp With Cntmentioning

confidence: 99%

Shape-Memory Polymers Based on Carbon Nanotube Composites

da Silva,

Proença,

Covas

et al. 2024

Micromachines

View full text Add to dashboard Cite

show abstract

“…where the α is the thermal expansion coefficient of GF/PU composite and the T ,t temperature change rate, respectively. Substituting the strain rate components expressions shown in Equations (3)(4)(5) into the Equation (2), the total strain rate of GF/PU composite expression can be rewritten as…”

Section: Thermodynamic Constitutive Equationmentioning

confidence: 99%

“…SMP exhibits poor mechanical performance, including low material strength and elastic modulus. These drawbacks directly result in reduced deformation recovery output force, poor motion reliability, and stability, 3 thereby impacting the application of SMP in relevant fields. To eliminate these drawbacks and minimize their adverse effects, as well as fully exploit the application potential of SMP in engineering and further extend their scope, SMP can be compounded with reinforcing fibers, particles, and other materials to create shape memory polymer composite (SMPC).…”

Section: Introductionmentioning

confidence: 99%

Theoretical solutions of short glass fiber/polyurethane composite beams based on Hamiltonian principle

Zhao,

Zhou,

Zhu

et al. 2023

Polymer Composites

View full text Add to dashboard Cite

Shape memory polymers (SMP) and its composites (SMPC) have gained popularity for their potential in intelligent structures fields. Developing a reliable mechanical model to accurately describe mechanical behavior of its intelligent structures is important for both theory and practice. This paper presents a novel mechanical model for describing the mechanical behavior of short glass fiber/polyurethane (GF/PU) composite beams, based on a constitutive model of SMP and incorporating principles from composite mechanics theory, the Hamiltonian principle and Euler–Bernoulli beam theory. The model includes kinematic equations and material parameter equations. Based on the constitutive equations of SMP, coupled with Euler–Bernoulli beam theory and Hamilton's principle, the kinematic equations of GF/PU composite beam are established. Additionally, a correction factor was proposed and employed to modify the material parameter equation of SMP, which was then combined with the mechanics theory of composite materials to establish a material parameter equation for composite beams. Taking a simply supported beam as an example, we solve the model using Fourier method and simulate and analyze the material parameters properties, static and viscous mechanical behaviors properties, and shape memory behavior properties of the GF/PU composite beam. The results show that the GF volume fraction, temperature correction coefficient, regularization parameter, and contact parameter have a significant impact on the material parameters of GF/PU composite materials and the material parameters of composite beams have important effects on their mechanical properties. By adjusting material parameters, ideal mechanical properties can be obtained for the GF/PU composite beam. This study provides a theoretical foundation for intelligent beam design and analysis based on SMP and SMPC.Highlights A novel viscoelastic mechanical model for GF/PU composite beam is proposed. Effect of composite components on GF/PU composite is studied. Kinematic equations based on Hamiltonian principle is established. Material parameter equation including corrected parameter is established.

show abstract

“…Numerous researchers have developed many shape memory materials based on macromolecule polymer. [20][21][22][23][24][25][26][27][28] The methods of ameliorating the shape memory performance have been carried out in extensive research, such as cross-linking, [29,30] incorporating inorganic fillers [31,32] or changing deformation conditions. [33] Although polyethylene (PE), one of the generalpurpose plastics, is the most widely used, the research in the field as SMP is still in its infancy.…”

Section: Introductionmentioning

confidence: 99%

“…Numerous researchers have developed many shape memory materials based on macromolecule polymer. [ 20–28 ] The methods of ameliorating the shape memory performance have been carried out in extensive research, such as cross‐linking, [ 29,30 ] incorporating inorganic fillers [ 31,32 ] or changing deformation conditions. [ 33 ]…”

Section: Introductionmentioning

confidence: 99%

Analysis of thermal‐active bending and cyclic tensile shape memory mechanism of UHMWPE/CNT composite

et al. 2022

View full text Add to dashboard Cite

The exploitation of shape memory ultra‐high‐molecular‐weight polyethylene (UHMWPE) can expand the application field as an intelligent material; however, low shape recovery ratio limits its further practical application. Herein, carbon nanotubes (CNT) are used to improve shape memory property of UHMWPE. Interestingly, after analyzing the bending and cyclic tensile shape memory properties of UHMWPE/CNT composite, it is found that bending shape memory property of UHMWPE/CNT composite is improved dramatically, while cyclic tensile shape memory property is not. The optimal bending shape memory property with shape fixity ratio of more than 95% and shape recovery ratio of about 94% can be obtained at 115°C. However, the shape recovery ratio in cyclic tensile shape memory test is only changed from 62.72% to 65.63%, and the shape fixity ratio is reduced from 85.82% to 82.83%. The main reason for this phenomenon is the possible difference in thermal‐active bending and cyclic tensile shape memory mechanism: CNT engender forced deformation in bending shape memory, while it does not exhibit in cyclic tensile shape memory. The outstanding bending shape memory property of UHMWPE/CNT composite make it possible for more promising applications.

show abstract

Effects of modified carbon nanotubes with different sizes on properties of epoxy shape memory polymers

Cited by 6 publications

References 34 publications

Shape-Memory Polymers Based on Carbon Nanotube Composites

Shape-Memory Polymers Based on Carbon Nanotube Composites

Theoretical solutions of short glass fiber/polyurethane composite beams based on Hamiltonian principle

Analysis of thermal‐active bending and cyclic tensile shape memory mechanism of UHMWPE/CNT composite

Contact Info

Product

Resources

About