High-strength, thermal-insulating, fire-safe bio-based organic lightweight aerogel based on 3D network construction of natural tubular fibers

Xu, Yue; Yan, Chentao; Du, Chunlei; Xu, Kai; Li, Yixuan; Xu, Min; Bourbigot, Serge; Fontaine, Gaëlle; Li, Bin; Liu, Lubin

doi:10.1016/j.compositesb.2023.110809

Cited by 31 publications

(6 citation statements)

References 47 publications

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“…As shown in Figures G and S2D–H in the Supporting Information, the increased volume of PVA from 0 to 1000 μL resulted in a decreasing trend in the pore size of inside the aerogels when the cold source was a refrigerator, proving that PVA acted as a cross-linking agent that the connection between components was enhanced gradually with the increased content of PVA. − In this case, the pores inside the aerogels exhibited a continuous honeycomb-like structure. We also examined the internal microstructure of the aerogels as the cold source was a lyophilizer.…”

Section: Resultsmentioning

confidence: 99%

“…Clearly, when the volume was below 200 μL, the compression strength of the aerogels displayed slight changes with different PVA contents. Apparently, when the introduction of PVA reached above 200 μL, the compression strength of the aerogels exhibited a significant enhancement with the increase of PVA content, indicating that the existence of PVA endowed the aerogels with tighter connections between the components. − Taking AP 500 T 600 aerogel as an example, eight consecutive cyclic compression tests were carried out under 30% compression strain. As shown in Figure D, the compression loading curve was inconsistent with the unloading curve, and there was a hysteresis loop owing to energy dissipation. − Notably, after eight cyclic compression tests, the compression strength of AP 500 T 600 aerogel decreased slightly from 4.86 to 4.05 kPa, demonstrating its desirable fatigue resistance.…”

Section: Resultsmentioning

confidence: 99%

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Biobased Aerogels Fabricated by the Ice Crystal Method for Smoke Purifying

Sun,

Chai,

Qian

et al. 2024

ACS Appl. Polym. Mater.

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Filters play a crucial role in smoke filtration. However, conventional cigarette filters lack degradability or high filtration capacity. Developing cigarette filters with low cost, degradability, and desirable filtration efficiency is an urgent requirement in the cigarette market. In this study, biobased composite aerogels with hierarchically porous structure for cigarette smoke are fabricated. The prepared aerogels consist of naturally biocompatible materials; the microfibrillated cellulose and poly(vinyl alcohol) endow the composite aerogels with mechanical robustness and flexibility. In addition, tannic acid not only has the effect of trapping toxic chemicals in smoke but also performs an antibacterial function in collaboration with the fabricated TTA-Alg polyelectrolyte. It is believed that the hierarchically porous structure of the biobased aerogels induced by the ice template method facilitates the adequate flow of the smoke in aerogels, resulting in high purification efficiency and a relatively constant pressure drop during the smoke filtration process, which is conducive for smoke purification. The prepared aerogel could efficiently capture toxic chemicals in smoke, including filtering 96.58% of oil smoke, 88.64% of total nonmethane hydrocarbons, and 94.79% of particulate matter, exhibiting higher removal efficiency than commercial cigarette filters. In brief, the designed biobased aerogels possess low cost, environmental friendliness, compressibility, and desirable smoke filtration efficiency, showing a promising application prospect for smoke filtration.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Biobased Aerogels Fabricated by the Ice Crystal Method for Smoke Purifying

Sun,

Chai,

Qian

et al. 2024

ACS Appl. Polym. Mater.

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“…As non-renewable resources, like fossil fuels, gradually run out, new forms of energy, like solar and wind power, have continuously produced and advanced toward electrification and a series of fire safety issues have emerged. Therefore, various fields have put forward higher requirements for the flame retardancy of materials in their thermal protection systems. − The flame-retardant paper has great potential in the field of power electronics as a result of its excellent processability, flexibility, adhesion, and excellent flame retardancy. − However, traditional cellulose-based flame-retardant paper requires the addition of a large number of flame retardants, which has an adverse impact on the environment and the mechanical properties of the materials. − In recent years, inorganic fibers have been widely used in the field of flame retardancy as a result of their inherent flame retardancy, but their paper strength is relatively low. , Therefore, it is necessary to develop green and environmentally friendly inorganic fiber composite paper with excellent mechanical properties, flame retardancy, and thermal stability.…”

Section: Introductionmentioning

confidence: 99%

Nacre-Inspired Aramid Nanofibers/Basalt Fibers Composite Paper with Excellent Flame Retardance and Thermal Stability by Constructing an Organic–Inorganic Fiber Alternating Layered Structure

Song,

Wang,

et al. 2024

ACS Appl. Mater. Interfaces

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The flame-retardant paper has gradually evolved into a necessary material in various industries as a result of the rising importance of fire safety, energy efficiency, and environmental preservation. Traditional cellulose paper requires the addition of a large amount of flame retardants to achieve flame retardancy, which poses a serious threat to mechanical quality and the environment. Therefore, there is an urgent need to develop inorganic fiber flame-retardant paper with good flexibility, high thermal stability, and inherent flame retardancy. Herein, inspired by the "brick-and-mortar" layered structure of nature nacre, we developed a layered composite paper with a unique alternating arrangement of organic−inorganic fibers by synergistically integrating environmentally sustainable basalt fiber (BF) and high-performance aramid nanofibers (ANFs) through a vacuum-assisted filtration process. The as-prepared ANFs/BF composite paper exhibited low thermal conductivity (0.024 W m −1 K −1 ), high tensile strength (54.22 MPa), and excellent flexibility. Thanks to its excellent thermal stability, the mechanical strength remains at a high level (92%) after heat treatment at 300 °C for 60 min. Furthermore, the peak heat release rate and smoke generation of ANFs/BF composite paper decreased by 44.6 and 95.3%, respectively. Therefore, the composite paper is promising for applications as a protective layer in flexible electronic devices, cables, and fire-retardant and high-temperature fields.

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“…Thus, lightweight materials with better insulating properties must be developed. Aerogels are solid materials with a three-dimensional porous network structure. , They have low densities (∼0.003 g cm –3 ) and ultralow thermal conductivity (0.013–0.15 W m –1 K –1 ), which makes them a promising solution for personal thermal management. , Owing to the abundance of nanopores and their infinite pole skeleton structures, aerogels can greatly inhibit heat transfer. Moreover, their low densities mean that they are lightweight, which makes them well-suited to personal thermal management. − …”

Section: Introductionmentioning

confidence: 99%

Woven Agarose–Cellulose Composite Aerogel Fibers with Outstanding Radial Elasticity for Personal Thermal Management

Yang,

Du,

Jiang

et al. 2024

ACS Appl. Mater. Interfaces

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Aerogel fibers are good thermal insulators, suitable for weaving, and show potential as the next generation of intelligent textiles that can effectively reduce heat consumption for personal thermal management. However, the production of continuous aerogel fibers from biomass with sufficient strength and radial elasticity remains a significant challenge. Herein, continuous gel fibers were produced via wet spinning using agarose (AG) as the matrix, 2,2,2,6,6-tetramethylpiperidine-1-oxyl radical-oxidized cellulose nanofibers (TOCNs) as the reinforcing agent, and no other chemical additives by utilizing the gelling properties of AG. Supercritical drying and chemical vapor deposition (CVD) were then used to produce hydrophobic AG-TOCN aerogel fibers (HATAFs). During CVD, the HATAF gel skeleton was covered with an isostructural silica coating. Consequently, the HATAFs can recover from radial compression under 60% strain. Moreover, the HATAFs have low densities (≤0.14 g cm–3), high porosities (≥91.8%), high specific surface areas (≥188 m2 g–1), moderate tensile strengths (≤1.75 MPa), excellent hydrophobicity (water contact angles of >130°), and good thermal insulating properties at different temperatures. Thus, HATAFs are expected to become a new generation of materials for efficient personal thermal management.

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High-strength, thermal-insulating, fire-safe bio-based organic lightweight aerogel based on 3D network construction of natural tubular fibers

Cited by 31 publications

References 47 publications

Biobased Aerogels Fabricated by the Ice Crystal Method for Smoke Purifying

Biobased Aerogels Fabricated by the Ice Crystal Method for Smoke Purifying

Nacre-Inspired Aramid Nanofibers/Basalt Fibers Composite Paper with Excellent Flame Retardance and Thermal Stability by Constructing an Organic–Inorganic Fiber Alternating Layered Structure

Woven Agarose–Cellulose Composite Aerogel Fibers with Outstanding Radial Elasticity for Personal Thermal Management

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