A lightweight porous shear stiffening composite foam with excellent mechanical–thermal coupling protection performance

Xuan, Tingting; Wang, Sheng; Liu, Shuai; Wang, Wenhui; Li, Zimu; Hu, Yuan; Gong, Xinglong

doi:10.1039/d4tc01077a

J. Mater. Chem. C

2024

DOI: 10.1039/d4tc01077a

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A lightweight porous shear stiffening composite foam with excellent mechanical–thermal coupling protection performance

Tingting Xuan,

Sheng Wang,

Shuai Liu

et al.

Abstract: The safeguarding performance against complex stimuli, such as thermal shock, is very critical for the welfare of humans and equipment. Constructing multifunctional mechanical-thermal coupling protective composites through structural design remains...

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Cited by 2 publications

References 42 publications

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Photothermally‐Induced Reversible Rigidity of Nacre‐Mimetic Composites Toward Semi‐Active Personal Safeguard

Li,

Wang,

Liu

et al. 2024

Adv Funct Materials

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The capacity to withstand challenges posed by complex environments is crucial for developing advanced high‐performance protective materials with mechanically adjustable nature. By constructing long‐range hierarchical network of shear‐stiffening gel‐carbon nanotube‐cellulose nanofiber (SCC) embedded within epoxy resin (ER), this work engineers a nacre‐inspired variable‐stiffness SCC‐ER composite (SCCE). Lightweight SCC scaffold attenuates falling impact force from 2.23 to 0.46 kN, and reaches 60 °C within 20 s under 1 sun exposure. Additionally, owing to the rigid ER matrix, SCCE exhibits 4.03 GPa elastic modulus, outperforming numerous conventional engineering materials in puncture resistance. Specific energy absorption of nacre‐mimetic SCCE presents 1.91 MJ m−3 while that of random structural SCCE is only 0.50 MJ m−3. More importantly, SCCE features representative photothermal‐induced reversible rigidity whose storage modulus varies from 9.85 MPa at 30 °C to 11.61 kPa at 116 °C under light stimulation. It also presents shape‐programmability, capable of adhering complex structural surfaces for protection. Eventually, SCCE‐based semi‐active adjustable protectors are constructed that leverage contactless photothermal effect to modulate rigidity. 5 mm‐thick smart SCCE‐protectors resist 163.93 m s−1 ballistic impact while 15‐mm commercial kneepads are penetrated at lower speed of 136.98 m s−1. This bio‐inspired semi‐active strategy proposes a promising avenue for enhancing personal protective equipment.

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Photothermally‐Induced Reversible Rigidity of Nacre‐Mimetic Composites Toward Semi‐Active Personal Safeguard

Li,

Wang,

Liu

et al. 2024

Adv Funct Materials

View full text Add to dashboard Cite

show abstract

A novel ethylene-vinyl acetate-impact hardening polymers composite with impact-resistance ability, strain-rate sensitivity and enhanced mechanical performance

Zhang,

Liu

et al. 2025

Materials Today Communications

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A lightweight porous shear stiffening composite foam with excellent mechanical–thermal coupling protection performance

Abstract: The safeguarding performance against complex stimuli, such as thermal shock, is very critical for the welfare of humans and equipment. Constructing multifunctional mechanical-thermal coupling protective composites through structural design remains...

Cited by 2 publications

References 42 publications

Photothermally‐Induced Reversible Rigidity of Nacre‐Mimetic Composites Toward Semi‐Active Personal Safeguard

Photothermally‐Induced Reversible Rigidity of Nacre‐Mimetic Composites Toward Semi‐Active Personal Safeguard

A novel ethylene-vinyl acetate-impact hardening polymers composite with impact-resistance ability, strain-rate sensitivity and enhanced mechanical performance

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