Thermal Sensitive Shape Memory Behavior of Epoxy Composites Reinforced with Silicon Carbide Whiskers

Wang, Yongkun; Tian, Wenchao; Liu, Xiaohan; Ye, Junjie

doi:10.3390/app7010108

Cited by 8 publications

(11 citation statements)

References 33 publications

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“…We have prepared epoxy-based SMPs filled with SiC w and reported a significant improve on bend strength for 64.1 per cent at 12 Wt.% of the SiC w . The shape fixity ratio increased as SiC w content increased (>99 per cent) and the shape recovery ratio slightly decreased as SiC w content increased (>95 per cent) (Wang et al, 2017).…”

Section: Introductionmentioning

confidence: 95%

Shape recovery characteristics of shape memory cyanate ester/epoxy composite reinforced with calcium sulfate whisker

Wang

Zhang

Zhang³

et al. 2020

PRT

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Purpose The purpose of this paper is to study the influence of calcium sulfate whiskers (CSWs) on the thermodynamic properties and shape memory properties of epoxy/cyanate ester shape memory composites. Design/methodology/approach To improve the mechanical properties of shape memory cyanate ester (CE)/epoxy polymer (EP) resin, high performance CSWs were used to reinforce the thermo-induced shape memory CE/EP composites and the shape memory CSW/CE/EP composites were prepared by molding. The effect of CSW on the mechanical properties and shape memory behavior of shape memory CE/EP composites was investigated. Findings After CSW filled the shape memory CE/EP composites, the bending strength of the composites is greatly improved. When the content of CSW is 5 Wt.%, the bending strength of the composite is 107 MPa and the bending strength is increased by 29 per cent compared with bulk CE/EP resin. The glass transition temperature and storage modulus of the composites were improved in CE/EP resin curing system. However, when the content of CSW is more than 10 Wt.%, clusters are easily formed between whiskers and the voids between whiskers and matrix increase, which will lead to the decrease of mechanical properties of composites. The results of shape memory test show that the shape memory recovery time of the composites decreases with the decrease of CSW content at the same temperature. In addition, the shape recovery ratio of the composites decreased slightly with the increase of the number of thermo-induced shape memory cycles. Research limitations/implications A simple way for fabricating thermo-activated SMP composites has been developed by using CSW. Originality/value The outcome of this study will help to fabricate the SMP composites with high mechanical properties and the shape memory CSW/CE/EP composites are expected to be used in space deployable structures.

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Section: Introductionmentioning

confidence: 95%

Shape recovery characteristics of shape memory cyanate ester/epoxy composite reinforced with calcium sulfate whisker

Wang

Zhang

Zhang³

et al. 2020

PRT

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“…The storage modulus at T m increased with the increase of silicon carbide whiskers, from 5.1 GPa to 8.8 GPa, and the T g also increased by nearly 20°C. Wang et al [ 152 ] introduced different amounts of SiCws into the EP matrix to form SMEPC. When the content reached 12 wt%, the bending strength of the material increased by 64.1%, and the T g value decreased slightly with the increase of SiCw content.…”

Section: Smep Compositesmentioning

confidence: 99%

Shape Memory Epoxy Resin and Its Composites: From Materials to Applications

2022

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Shape memory polymers (SMPs) have historically attracted attention for their unique stimulation-responsive and variable stiffness and have made notable progress in aerospace, civil industry, and other fields. In particular, epoxy resin (EP) has great potential due to its excellent mechanical properties, fatigue resistance, and radiation resistance. Herein, we focus on the molecular design and network construction of shape memory epoxy resins (SMEPs) to provide opportunities for performance and functional regulation. Multifunctional and high-performance SMEPs are introduced in detail, including multiple SMEPs, two-way SMEPs, outstanding toughness, and temperature resistance. Finally, emerging applications of SMEPs and their composites in aerospace, four-dimensional printing, and self-healing are demonstrated. Based on this, we point out the challenges ahead and how SMEPs can integrate performance and versatility to meet the needs of technological development.

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“…Schematic Illustration of the Shape-Morphing Process filler to the SMP, but the introduction of the filler deteriorates the performance of the shape-morphing process. 46,48,49 To overcome this drawback, we developed a novel polymer network in this research that shows excellent shape memory characteristics with high thermal conductivity.…”

Section: ■ Introductionmentioning

confidence: 99%

Shape-Morphing Thermoactuators: Tetrathiafulvalene-Based Polymer Networks with an Effective Phonon Conduction Pathway

Rim

Kang

et al. 2021

Chem. Mater.

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The development of a shape memory polymer (SMP) with high thermal conductivity should precede the fabrication of fast-responsive soft thermoactuators because the effective heat transfer in thermoactuators expedites the shape-morphing process. A tetrathiafulvalene (TTF)-based monomer (TTF-SH) containing four flexible chains and thiol reactive functions is newly designed and synthesized for the development of SMP with excellent thermal conductivity. Thanks to the thermally induced chemical bond formation of TTF-SH from thiol to disulfide, TTF-based SMP is simply prepared without the addition of any catalyst or initiator. The TTF SMP exhibits not only high thermal conductivity (1.12 W/(m K)) but also high fixing and recovery ratios (99.42 and 99.98%). The correlation between heat transfer and shape-morphing speed of the TTF SMP is established by examining shape memory characteristics over time. The TTF SMP shows a fast shape-morphing response due to its excellent thermal conductivity. With the newly developed TTF SMP thermoactuator, we demonstrate a warning sensor to alarm the device overheating as well as a smart sunshade to automatically cut off solar energy.

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Thermal Sensitive Shape Memory Behavior of Epoxy Composites Reinforced with Silicon Carbide Whiskers

Cited by 8 publications

References 33 publications

Shape recovery characteristics of shape memory cyanate ester/epoxy composite reinforced with calcium sulfate whisker

Shape recovery characteristics of shape memory cyanate ester/epoxy composite reinforced with calcium sulfate whisker

Shape Memory Epoxy Resin and Its Composites: From Materials to Applications

Shape-Morphing Thermoactuators: Tetrathiafulvalene-Based Polymer Networks with an Effective Phonon Conduction Pathway

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