Effect of shear thickening gel on microstructure and impact resistance of ethylene–vinyl acetate foam

Tu, Huan; Xu, Pengzhao; Yang, Zhe; Tang, Fan; Dong, Cheng; Chen, Yuchao; Cao, Wenjian; Huang, Chenguang; Guo, Yacong; Wei, Yanpeng

doi:10.1016/j.compstruct.2023.116811

Cited by 17 publications

(7 citation statements)

References 46 publications

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“…Shear-stiffening materials (SSMs) have emerged recently, which show a transformation from a liquid state to a solid state with increasing external strain rates. − Polydiborosiloxane (PDBS), a new shear-stiffening material reported by our group recently, is a kind of polysiloxane in whose chains diboron structures are introduced. Compared with polyborosiloxane (PBS, the traditional shear-stiffening material), PDBS exhibits better anti-impact ability through diboron/oxygen dative bonds. , Such impact resistance of shear-stiffening materials has increasingly attracted attention from the academic perspective. − For example, Gong et al prepared a host–guest structural composite consisting of SSMs dispersively distributed in a porous polyimide matrix, which effectively attenuates the impact force of 85.8–92.3% and provides a reliable guarantee for conductive elements against impact; Huang et al constructed cellulose supported SSMs, resulting in stable shapes with significantly impact-resistant performance; Zhang et al developed an impact-hardening gel composed of SSMs and polyethylene glycol, which exhibits an outstanding protective ability by reducing the impact force by 80.2% of that of the control. Therefore, SSMs provide a new strategy to design the molecular structure of mouthguard materials to improve the shock absorption of a mouthguard, thereby relieving the discomfort of the mouthguard.…”

Section: Introductionmentioning

confidence: 99%

A Shear-Stiffening Mouthguard with Excellent Shock Absorption Capability and Remoldability via a Dynamic Dual Network

Zhou,

Wu,

Pan

et al. 2024

ACS Appl. Bio Mater.

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Mouthguards are used to reduce injuries and the probability of them to orofacial tissues when impacted during sports. However, the usage of a mouthguard is low due to the discomfort caused by the thickness of the mouthguard. Herein, we have constructed a dynamic dual network to fabricate a shear-stiffening mouthguard with remoldability, which are called remoldable shear-stiffening mouthguards (RSSMs). Based on diboron/oxygen dative bonds, RSSMs show a shearstiffening effect and excellent shock absorption ability, which can absorb more than 90% of the energy of a blank. Even reducing the thickness to half, RSSMs can reduce approximately 25% of the transmitted force and elongate by about 1.6-fold the buffer time compared to commercial mouthguard materials (Erkoflex and Erkoloc-pro). What is more, owing to the dynamic dual network, RSSMs show good remolding performance with unchanged shear-stiffening behavior and impact resistance, which conforms to the existing vacuum thermoforming mode. In addition, RSSMs exhibit stability in artificial saliva and biocompatibility. In conclusion, this work will broaden the range of mouthguard materials and offer a platform to apply shear-stiffening materials to biomedical applications and soft safeguarding devices.

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Section: Introductionmentioning

confidence: 99%

A Shear-Stiffening Mouthguard with Excellent Shock Absorption Capability and Remoldability via a Dynamic Dual Network

Zhou,

Wu,

Pan

et al. 2024

ACS Appl. Bio Mater.

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“…[34][35][36] Upon removal of the impact force, the shear-thickening materials instantly revert to their original elastic state. The shear-thickening properties have broad application prospects in shock absorption, [37][38][39] human body protection, [40][41][42][43][44] and surface polishing [45][46][47] owing to their ability to absorb significant amounts of impact energy. However, they have not yet been adopted for microscale electrode protection.…”

Section: Introductionmentioning

confidence: 99%

Intelligent Stress‐Adaptive Binder Enabled by Shear‐Thickening Property for Silicon Electrodes of Lithium‐Ion Batteries

Kwon,

Kim,

Kim

et al. 2024

Advanced Energy Materials

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Elastic binders with supramolecular interactions are widely explored to mitigate the stress caused by the volume expansion of electrode materials, such as Si, S, or Li metals, in next‐generation secondary batteries. Herein, a new class of elastic binders is proposed with an automatic stress‐control mechanism capable of responding in real time to dynamic local stress variations. Specifically, this study focuses on the shear‐thickening behavior, wherein polymers automatically amplify their viscoelasticity in response to local shear‐stress changes. To realize an intelligent stress‐adaptive binder, starch analogs exhibiting shear‐thickening properties and unique crystallinity are employed as binders for highly expandable Si anodes. The shear‐thickening mechanism is comprehensively investigated using deep‐learning‐based molecular dynamics (MD) simulations and in situ transmission electron microscopy (TEM) analysis, which determines the optimal conditions for effectively limiting dynamic local surface expansion. Among the starch analogs, the amylose and long‐chain amylopectin (AMLAP) binder demonstrates improved high‐rate capability (1710 mAh g−1 at 5 C) and superior reversible capacity (2025 and 1493 mAh g−1 after 100 and 500 cycles, respectively, at 1 C) with optimal shear‐thickening properties. Furthermore, AMLAP exhibits favorable characteristics for affordable large‐scale production. Hence, this study clearly demonstrates that the shear‐thickening properties of binders can be considered a new factor in fabricating stable electrodes with extremely expandable materials.

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“…Shao [9] and others investigated the enhancement of STG's shear-thickening properties by particles of different scales. Tu [10] and colleagues developed composite foam of STG/EVA, significantly improving its protective performance while maintaining EVA foam's softness, lightweight and elasticity. Although STG has been widely applied in areas such as stab resistance, spike protection, low-speed and highspeed impacts, there is limited research on its application in fuzes' protection.…”

Section: Introductionmentioning

confidence: 99%

Influence patterns of shear-thickening gel on overload transmission: a numerical simulation study

Wang,

Pi,

Wang

et al. 2024

J. Phys.: Conf. Ser.

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To address signal aliasing challenges encountered by smart munition fuzes during penetration and layer counting processes, this study employs shear-thickening gel (STG) as a cushioning protective material for accelerometers. Based on the SHPB test platform, the test is designed and the finite element numerical simulation is carried out. The thickness of the shear-thickening gel specimen is treated as a research variable, enabling a systematic analysis of its mechanical filtering effect on overload acceleration. Furthermore, a spring-damping physical model for the cushioning structure is established, facilitating a theoretical exploration of the filtering mechanism on the acceleration signal. Research findings indicate that within a certain frequency bandwidth, STG materials can effectively filter out high-frequency signals received by the accelerometer. Additionally, augmenting the thickness of STG materials has a positive impact on achieving superior filtering performance within the high-frequency range.

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Effect of shear thickening gel on microstructure and impact resistance of ethylene–vinyl acetate foam

Cited by 17 publications

References 46 publications

A Shear-Stiffening Mouthguard with Excellent Shock Absorption Capability and Remoldability via a Dynamic Dual Network

A Shear-Stiffening Mouthguard with Excellent Shock Absorption Capability and Remoldability via a Dynamic Dual Network

Intelligent Stress‐Adaptive Binder Enabled by Shear‐Thickening Property for Silicon Electrodes of Lithium‐Ion Batteries

Influence patterns of shear-thickening gel on overload transmission: a numerical simulation study

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