Biomimetic Carbon Tube Aerogel Enables Super-Elasticity and Thermal Insulation

Zhan, Hui-Juan; Wu, Kun; Hu, Yalin; Liu, Jian‐Wei; Li, Han; Guo, Xu; Xu, Jie; Yang, Yuan; Yu, Zhi‐Long; Gao, Huai‐Ling; Luo, Xisheng; Chen, Jiafu; Ni, Yong; Yu, Shu‐Hong

doi:10.1016/j.chempr.2019.04.025

Cited by 171 publications

(90 citation statements)

References 44 publications

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“…The behavior of this strongly crosslinked junction was further illustrated by mechanical simulations (Figure 3e). [ 24 ] The finite‐elements network model was built to mimic the filamentous architecture, where crossed nanocomposite fibrils are interfused together by PMSQ. In our system, due to the discontinuous TCL, extra PMSQ was accumulated on the junction of crossed nanofibers to serve as strong crosslinkers.…”

Section: Resultsmentioning

confidence: 99%

Hierarchical Interface Engineering for Advanced Nanocellulosic Hybrid Aerogels with High Compressibility and Multifunctionality

Zhang

Cheng

et al. 2021

Adv Funct Materials

112

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The hierarchical combination of mineral and biopolymer building blocks is advantageous for the notable properties of structural materials. Integrating silane and cellulose nanofibers into high‐performance hybrid aerogels is promising yet remains challenging due to the unsatisfied interface connections. Here, an interfacial engineering strategy is introduced via freeze–drying‐induced wetting and mineralization to reinforce the hierarchical porous cellulose network, resulting in mineral‐coated nanocellulose hybrid aerogels in a simple and consecutive bottom‐up assembly process. With optimized multiscale interfacial engineering between the stiff and soft components, the resulting cellulose‐based hybrid aerogels are endowed with lightweight (>0.7 mg cm−3), superior enhanced mechanical compressibility (>99% strain) within a wide temperature range, as well as super‐hydrophobicity (≈168°) and moisture stability under high humidity (95% relative humidity). Benefiting from these superior characters, the multifunctional hybrid aerogels as effective oil/water absorbents with excellent recyclability, thermal insulators in extreme conditions, and sensitive strain sensors are demonstrated. This assembly approach with optimized interfacial features is scalable and efficient, affording high‐performance cellulose‐based aerogels for various applications.

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Section: Resultsmentioning

confidence: 99%

Hierarchical Interface Engineering for Advanced Nanocellulosic Hybrid Aerogels with High Compressibility and Multifunctionality

Zhang

Cheng

et al. 2021

Adv Funct Materials

112

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“…Recent studies have shown that the thermal insulation property of textiles is determined by many factors. Among them, thermal convection, solid/air thermal conduction, and thermal radiation are the main parameters [22,38,39]. Compared to hollow fibers and conventional fabrics, the thermal convection of aerogel fiber is greatly restricted because air is blocked within micropores, mesopores, and macropores.…”

Section: Resultsmentioning

confidence: 99%

Continuous, Strong, Porous Silk Firoin-Based Aerogel Fibers toward Textile Thermal Insulation

et al. 2019

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Aerogel fiber, with the characteristics of ultra-low density, ultra-high porosity, and high specific surface area, is the most potential candidate for manufacturing wearable thermal insulation material. However, aerogel fibers generally show weak mechanical properties and complex preparation processes. Herein, through firstly preparing a cellulose acetate/polyacrylic acid (CA/PAA) hollow fiber using coaxial wet-spinning followed by injecting the silk fibroin (SF) solution into the hollow fiber, the CA/PAA-wrapped SF aerogel fibers toward textile thermal insulation were successfully constructed after freeze-drying. The sheath (CA/PAA hollow fiber) possesses a multiscale porous structure, including micropores (11.37 ± 4.01 μm), sub-micron pores (217.47 ± 46.16 nm), as well as nanopores on the inner (44.00 ± 21.65 nm) and outer (36.43 ± 17.55 nm) surfaces, which is crucial to the formation of a SF aerogel core. Furthermore, the porous CA/PAA-wrapped SF aerogel fibers have many advantages, such as low density (0.21 g/cm3), high porosity (86%), high strength at break (2.6 ± 0.4 MPa), as well as potential continuous and large-scale production. The delicate structure of multiscale porous sheath and ultra-low-density SF aerogel core synergistically inhibit air circulation and limit convective heat transfer. Meanwhile, the high porosity of aerogel fibers weakens heat transfer and the SF aerogel cellular walls prevent infrared radiation. The results show that the mat composed of these aerogel fibers exhibits excellent thermal insulating properties with a wide working temperature from −20 to 100 °C. Therefore, this SF-based aerogel fiber can be considered as a practical option for high performance thermal insulation.

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“…This may be analogous to the effect of air pocket microstructures in rGO lms and biomimetic porous bers. [47][48][49] However, the apparent thermal conductivities in the axial direction exhibit a tendency to increase, owing to the effective thermal conduction along the vertically aligned cell channels. The typical thermal transport mechanism of the rGO/ PI nanocomposite can be ascribed to the highly ordered architecture formed by the strong orientation effect and the synergistic effect between orientation-dependent radiation, solid conduction of the nanostructured cell walls and insignicant natural convection along the cellular channels.…”

Section: Resultsmentioning

confidence: 99%

Lightweight, mechanically flexible and thermally superinsulating rGO/polyimide nanocomposite foam with an anisotropic microstructure

et al. 2019

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Biomimetic Carbon Tube Aerogel Enables Super-Elasticity and Thermal Insulation

Cited by 171 publications

References 44 publications

Hierarchical Interface Engineering for Advanced Nanocellulosic Hybrid Aerogels with High Compressibility and Multifunctionality

Hierarchical Interface Engineering for Advanced Nanocellulosic Hybrid Aerogels with High Compressibility and Multifunctionality

Continuous, Strong, Porous Silk Firoin-Based Aerogel Fibers toward Textile Thermal Insulation

Lightweight, mechanically flexible and thermally superinsulating rGO/polyimide nanocomposite foam with an anisotropic microstructure

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