Novel vapor-grown carbon nanofiber/epoxy shape memory nanocomposites prepared via latex technology

Dong, Yubing; Ni, Qing‐Qing; Li, Lili; Fu, Yaqin

doi:10.1016/j.matlet.2014.06.084

Cited by 42 publications

(13 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The shape recovery of the EP was improved by CNF dosage and the recovery ratio was further enhanced when silanized CNF replaced the untreated one in the corresponding formulation. SMEP nanocomposites were produced by hot pressing of a freeze-dried compound composed of amine-cured waterborne EP, vapour-grown CNF [ 138 , 139 ] and/or in situ produced silica (organosilane-based sol-gel technique) [ 138 ]. The SM behaviour of these nanocomposites containing up to 2.5 wt % nanofiller was investigated in fold-deploy tests at temperatures close and slightly above the T g and excellent R f and R r values were obtained.…”

Section: Shape Memory Ep Compositesmentioning

confidence: 99%

Review of Progress in Shape Memory Epoxies and Their Composites

2017

View full text Add to dashboard Cite

Shape memory polymer (SMP) is capable of memorizing one or more temporary shapes and recovering successively to the permanent shape upon various external stimuli. Beside of the above mentioned one-way variants, also two-way shape memory polymers (SMPs) and shape memory (SM) systems exist which feature a reversible shape change on the basis of "on-off switching" of the external stimulus. The preparation, properties and modelling of shape memory epoxy resins (SMEP), SMEP foams and composites have been surveyed in this exhaustive review article. The underlying mechanisms and characteristics of SM were introduced. Emphasis was put to show new strategies on how to tailor the network architecture and morphology of EPs to improve their SM performance. To produce SMEPs novel preparation techniques, such as electrospinning, ink printing, solid-state foaming, were tried. The potential of SMEPs and related systems as multifunctional materials has been underlined. Added functionality may include, among others, self-healing, sensing, actuation, porosity control, recycling. Recent developments in the modelling of SMEPs were also highlighted. Based on the recent developments some open topics were deduced which are merit of investigations in future works.

show abstract

Section: Shape Memory Ep Compositesmentioning

confidence: 99%

Review of Progress in Shape Memory Epoxies and Their Composites

2017

View full text Add to dashboard Cite

show abstract

“…Given the necessity for structures to be suitable for many practical applications that require particular functions, SMP composites are beginning to be studied. Reinforced SMP composites mainly include nanofiber, 24,25 particle/short fiber 26–31 and continuous long fiber 32–35 reinforcement. In this regard, several studies have been conducted to investigate the effect of different reinforcements on the shape memory behaviors of the composites.…”

Section: Introductionmentioning

confidence: 99%

Design and characterization of 3D multilayer woven reinforcements shape memory polymer composites

Goda

Zubair

L’Hostis

et al. 2020

Journal of Composite Materials

View full text Add to dashboard Cite

Shape memory polymer (SMP) composites are attractive and excellent smart materials due to their outstanding properties and rich functionality as they combine typical mechanical and functional properties of composites with shape memory properties. In particular, 3D reinforced preforms have tremendous potential for the development of functional composites by using the capabilities of 3D woven fabric preform design, and polymer shape memory behavior. Within that scope, this work aims to investigate the shape memory behavior and shape recovery properties of a specific type of 3D multilayer woven SMP composite in response to external stimuli. For this purpose, nine different multilayer stitched fabrics are produced with different weave structures, and different fabric thread densities using polyimide filaments. Then, a series of tests is carried out on these fabrics to evaluate their mechanical and physical properties. The layered fabric design that delivers high mechanical performance is next involved to manufacture the SMP composite samples, for which shape recovery capability is investigated. Fold-deploy and other shape memory cycle tests are performed to evaluate the shape memory characteristics. An optical 3D scanner based on fringe projection is further proposed to precisely acquire the geometry data and perform deformation analysis to quantitatively evaluate the shape fixity and shape recovery behaviors. The results from this study are very promising, demonstrating that these multilayer SMP structures can successfully be recovered following the desired design constraints without noticeable damage.

show abstract

“…In this investigation, an electrical-active 2W-SMP nanocomposite incorporated with vapor-grown carbon nanofibers (VGCNFs) was fabricated and investigated. Similar to carbon nanotubes, VGCNFs possess exceptional mechanical, thermal, and electrical properties and are inexpensive and easy to prepare (Dong et al, 2013, 2014; Endo et al, 2001; Shen et al, 2015; Zhu et al, 2014;). The crosslinked EVA 2W-SMPs utilized in this work are commercially available polymers.…”

Section: Introductionmentioning

confidence: 99%

Vapor-grown carbon nanofiber/poly(ethylene-co-vinyl acetate) composites with electrical-active two-way shape memory behavior

Chen

Zhu

Dong

et al. 2017

Journal of Intelligent Material Systems and Structures

Self Cite

View full text Add to dashboard Cite

Vapor-grown carbon nanofibers were filled into poly(ethylene-co-vinyl acetate) through solution mixing to achieve electrical-active two-way shape memory. The vapor-grown carbon nanofiber/poly(ethylene-co-vinyl acetate) nanocomposites were systematically and explicitly investigated through combined analytical techniques. Experimental results showed an increase in crystallization temperature ( Tc) and a decrease in melting temperature ( Tm) as the vapor-grown carbon nanofiber concentration in the nanocomposites increased. This result indicates that carbon nanofibers can act as nucleating agents during crystallization but may hinder the formation of thermodynamically stable crystals. The nanocomposites had a higher modulus but a lower strength than pure poly(ethylene-co-vinyl acetate). In two-way shape memory testing, a decrease in reversible strain and shape recovery occurred in the nanocomposites. Nevertheless, obvious two-way shape switching was observed in all samples during cyclic heating and cooling. The nanocomposite with 15% vapor-grown carbon nanofibers could be electrically heated rapidly and uniformly because of the high conductivity of vapor-grown carbon nanofibers and their uniform distribution in the matrix. Finally, the electrical-active two-way shape memory effect was achieved. This work contributes to the design of electrical-active two-way shape memory polymers in device applications for advanced functions.

show abstract

Novel vapor-grown carbon nanofiber/epoxy shape memory nanocomposites prepared via latex technology

Cited by 42 publications

References 13 publications

Review of Progress in Shape Memory Epoxies and Their Composites

Review of Progress in Shape Memory Epoxies and Their Composites

Design and characterization of 3D multilayer woven reinforcements shape memory polymer composites

Vapor-grown carbon nanofiber/poly(ethylene-co-vinyl acetate) composites with electrical-active two-way shape memory behavior

Contact Info

Product

Resources

About