Synthesis and properties of the vapour-grown carbon nanofiber/epoxy shape memory and conductive foams prepared via latex technology

Dong, Yubing; Ding, Juan; Wang, Jing; Fu, Xiang; Hu, Huimin; Li, Shan; Yang, Haichuan; Xu, Congsheng; Du, Mingliang; Fu, Yaqin

doi:10.1016/j.compscitech.2012.12.011

Cited by 44 publications

(30 citation statements)

References 22 publications

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“…Dong et al synthesized epoxy‐based SMP foams with vapor‐grown carbon nanofibers (VGCNF) to enhance the mechanical properties of epoxy foams. As shown in Figure , the addition of VGCNF into the polymer matrix decreased T g to 48 °C compared to 60 °C for the control epoxy foam . This shift in T g can be attributed to the disruption of network organization and a decrease in the physical crosslink density within the system …”

Section: Characterization Techniquesmentioning

confidence: 86%

“…Transition temperatures ( T trans ) are a key feature of thermally actuated SMPs that control the shape memory behavior of the system. These foams are rigid below their glass transition temperature ( T g ), and become rubbery when heated above T g . If the T g is the T trans , the SMP will recovery to its original shape.…”

Section: Characterization Techniquesmentioning

confidence: 99%

“…SMP nanocomposite foams have been developed with varying T g 's using fillers such as carbon nanotubes and tungsten nanoparticles. Dong et al synthesized epoxy‐based SMP foams with vapor‐grown carbon nanofibers (VGCNF) to enhance the mechanical properties of epoxy foams.…”

Section: Characterization Techniquesmentioning

confidence: 99%

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Porous shape memory polymers: Design and applications

Hasan

Nash

Maitland

2016

J Polym Sci B Polym Phys

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Porous shape memory polymers (SMPs) exhibit geometric and volumetric shape change when actuated by an external stimulus and can be fabricated as foams, scaffolds, meshes, and other polymeric substrates that possess porous three-dimensional macrostructures. These materials have applications in multiple industries such as textiles, biomedical devices, tissue engineering, and aerospace. This review article examines recent developments in porous SMPs, with a focus on fabrication methods, methods of characterization, modes of actuation, and applications.

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Section: Characterization Techniquesmentioning

confidence: 86%

Section: Characterization Techniquesmentioning

confidence: 99%

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Porous shape memory polymers: Design and applications

Hasan

Nash

Maitland

2016

J Polym Sci B Polym Phys

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“…These hollow glass or phenolic microsphere‐filled epoxy foams are more commonly known as syntactic epoxy foams and their porosities are controlled by the concentration of the hollow microspheres introduced into the initial liquid epoxy resin. Epoxy resins can also be foamed using physical or chemical blowing agents to produce epoxy foams.…”

Section: Physical and Mechanical Properties Of The Fabricated Macropomentioning

confidence: 99%

Enhancing the Fracture Resistance and Impact Toughness of Mechanically Frothed Epoxy Foams with Hollow Elastomeric Microspheres

Song

Tagarielli

Lee

2018

Macro Materials & Eng

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Nonporous elastomeric particles are often employed to improve the toughness of brittle epoxy foams but this also decreases their compressive strength and stiffness. Herein, a novel strategy utilizing hollow elastomeric microspheres as toughening agent for epoxy foams is presented. The addition of 0.5 wt.% hollow elastomeric microspheres into epoxy foam leads to a 15% increase in critical stress intensity factor (K 1c) to 0.38 MPa m0.5 and 33% increase in Charpy impact strength (acU ) to 1.05 kJ m−2, respectively, compared to unfilled epoxy foam (K 1c = 0.33 MPa m0.5 and acU = 0.79 kJ m−2). However, a further increase in the hollow elastomeric microsphere concentration to 1.0 wt.% leads to microsphere agglomeration, which reduces both K 1c and acU to 0.35 MPa m0.5 and 0.93 kJ m−2, respectively. Nevertheless, the added hollow elastomeric microspheres do not lead to a reduction in the quasi‐static compressive properties of the epoxy foams.

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“…Therefore, LCEs are especially suitable for being used as advanced shape memory composites matrix. However, there were several reported studies about the shape memory effect of epoxies and epoxy composites but only few works focused on the shape memory effect of liquid crystalline epoxies and their composites.…”

Section: Introductionmentioning

confidence: 99%

Reinforcement in the mechanical properties of shape memory liquid crystalline epoxy composites

Guo

Zheng

et al. 2015

J of Applied Polymer Sci

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In this work, novel thermoresponsive shape memory composites based on glass fiber and nanosilica‐modified liquid crystalline epoxies (LCEs) with lateral substituent were prepared and characterized. According to the comprehensive analysis of polarized optical microscopy, wide‐angle X‐ray diffraction measurements, and tan δ data, the orientation of mesogen units were hindered by the introduction of nanosilica and lateral substituents of liquid crystalline epoxies, so that additional physical cross‐links except for similar chemical cross‐links emerged with the introduction of surface‐treated nanosilica. And the increased cross‐links could enhance the shape memory properties of the composites which could recover to their original state quickly in a time shorter than 30 s with high shape fixing ratios (>96%) and high shape recovery ratios (>98%), which indicated the composites could be applied into self‐deployable structural materials. Moreover, the reinforcement in the dynamic storage moduli, tensile modulus, and the tensile strength and shape memory properties indicated that glass fiber and nanosilica‐modified shape memory liquid crystalline epoxy composites could be high‐performance composites and could be used as new candidates for aerospace smart materials. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015, 132, 42616.

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Synthesis and properties of the vapour-grown carbon nanofiber/epoxy shape memory and conductive foams prepared via latex technology

Cited by 44 publications

References 22 publications

Porous shape memory polymers: Design and applications

Porous shape memory polymers: Design and applications

Enhancing the Fracture Resistance and Impact Toughness of Mechanically Frothed Epoxy Foams with Hollow Elastomeric Microspheres

Reinforcement in the mechanical properties of shape memory liquid crystalline epoxy composites

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