Facile preparation of high strength aerogel based on polysulfonamide

Zhang, Sufeng; Zhang, Nan; Qian, Liwei; Liu, Ye; Ren, Huijun; Li, Yongwei

doi:10.1016/j.matlet.2019.05.024

Cited by 8 publications

(3 citation statements)

References 12 publications

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“…At a fracture strain of 82.63%, the maximum compression stress of H2F-SA is as high as 26.40 MPa (Figure b). In terms of the compression specific strength and fracture strain, H2F-SA is superior to other aerogels with excellent mechanical properties (Figure c), ,,− emphasizing its excellent mechanical resistance to compression. Also, with this special structure, H2F-SA also achieves the coexistence of high strength and excellent processability.…”

Section: Resultsmentioning

confidence: 97%

SiO₂ Nanostructure-Based Aerogels with High Strength and Deformability for Thermal Insulation

Long

Wei

et al. 2023

ACS Appl. Nano Mater.

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Conventional SiO 2 aerogels composed of 0-dimensional nanoparticles do not have large-scale compression, tensile, and shear deformation capabilities, and the poor mechanical properties hinder their further development and application. We report a scalable strategy to construct the nanoporous network of a SiO 2 aerogel by alternately linking octa(aminophenyl)-T8-POSS and hexaphthalic acid. The resulting SiO 2 aerogel exhibits high strengths (compression, tensile and shear strengths are 26.4, 9.16, and 8.31 MPa, respectively), excellent deformabilities (fracture compression, tensile, and shear strains are 82.63%, 57.81% and 108.02%, respectively), flexbile processability and good structural stability (only 1.7% plastic deformation occurs after 100 load−unload cycles at a large compression strain of 70%). Also, the mesoporous interconnected nanoskeleton with high porosity and the composition of fully hydrophobic groups also give the aerogel low thermal conductivities (0.02854 W/(m K) at 25 °C and 0.04638 W/(m K) at 300 °C) and superhydrophobic properties (hydrophobic angle 160°and saturated mass moisture absorption rate about 0.375%). The combination of these excellent properties ensures that the aerogel can be used as an efficient thermal insulation material for extreme environments, such as those where comprehensive mechanical and hydrophobic properties are strictly required.

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Section: Resultsmentioning

confidence: 97%

SiO₂ Nanostructure-Based Aerogels with High Strength and Deformability for Thermal Insulation

Long

Wei

et al. 2023

ACS Appl. Nano Mater.

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“…(3) The salty crude oil to be eluted with water to avoid the risk of corrosion to subsequent process equipment. , Therefore, it is of great significance to develop efficient technologies for oil–water separation. The traditional methods include physical methods such as centrifugal separation, flotation, and gravity separation; chemical approaches such as salting out, flocculation, and acidification; electrochemical methods including electrolytic separation and electromagnetic separation; and biological treatment including oxidation pond method and activated sludge method. ,,− Among these methods, adsorption and filtration are the most widely used methods. − …”

Section: Introductionmentioning

confidence: 99%

Combination of an Asphalt Stabilizer and a Cellulose–Chitosan Composite Aerogel Used for the Separation of Oil–Water Mixtures Containing Asphalt

et al. 2021

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In this paper, cellulose chitosan composite aerogels were prepared through sol–gel and freeze-drying processes. The porous morphology of the aerogels was controlled by adjusting the cellulose concentration. Within a certain range, as the concentration of cellulose increases, the pore diameter of the composite aerogel becomes smaller and the pore structure becomes denser. The cellulose–chitosan composite aerogel can successfully separate the oil–water mixture without asphalt and showed stable filtration performance. The filtration speed is basically unchanged after a slight decrease and can be maintained at about 90% of the initial filtration speed within 30 min. The filtration speed can reach up to 9315 kg·h–1·m–2. When filtering bituminous oil–water mixtures, the filtration rate decreased significantly, with a 50% drop in 30 min. After adding the asphalt stabilizer poly(styrene-alt-octadecyl maleimide) (SNODMI), which is made in our laboratory, the effect of aerogel filtering the asphalt-containing oil–water mixture is obviously improved, and the downward trend of filtration speed is obviously improved. The combination of SNODMI and cellulose–chitosan has great application potential in the field of asphalt-containing oil–water separation.

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“…Until finally, the HF-SiO 2 aerogel is damaged at 83.32% compression strain, corresponding to an maximum compression stress of 22.15 MPa, indicating that it can withstand a maximum weight of more than 915240 times its own weight before being broken, which is almost impossible to achieve with other types of aerogels. In terms of both compression strength and fracture strain, other reported high-strength aerogels have difficulty in outperforming the HF-SiO 2 aerogel, even with the support of greater density (0.23–0.5 g/cm 3 ) (Figure d), ,− which further demonstrates the design advantages and application potential of hard cores and flexible chains alternately constructing the aerogel skeleton structure. Even so, the high compression strength does not affect the processability of the HF-SiO 2 aerogel, which can be easily separated neatly with a small knife, mainly due to the high local pressure generated by the two-dimensional force during cutting, which effectively breaks the flexible multilinked molecular chains (Figure S4).…”

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confidence: 95%

Highly Deformable High-Strength SiO₂ Aerogel Designed with an Alternating Structure of Hard Cores and Flexible Chains for Thermal Insulation

et al. 2023

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Thermally insulating aerogels can now be prepared from ceramics, polymers, carbon, and metals and composites between them. However, it is still a great challenge to make aerogels with high strength and excellent deformability. We propose a design concept of hard cores and flexible chains that alternately construct the aerogel skeleton structure. The approach gives the designed SiO 2 aerogel excellent compressive (fracture strain 83.32%), tensile. and shear deformabilities, corresponding to maximum strengths of 22.15, 1.18, and 1.45 MPa, respectively. Also, the SiO 2 aerogel can stably perform 100 load−unload cycles at a 70% large compression strain, demonstrating an excellent resilient compressibility. In addition, the low density of 0.226 g/cm 3 , the high porosity of 88.7%, and the average pore size of 45.36 nm effectively inhibit heat conduction and heat convection, giving the SiO 2 aerogel outstanding thermal insulation properties [0.02845 W/(m•K) at 25 °C and 0.04895 W/(m•K) at 300 °C], and the large number of hydrophobic groups itself also gives it excellent hydrophobicity and hydrophobic stability (hydrophobic angle of 158.4°and saturated mass moisture absorption rate of about 0.327%). The successful practice of this concept has provided different insights into the preparation of high-strength aerogels with high deformability.

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Facile preparation of high strength aerogel based on polysulfonamide

Cited by 8 publications

References 12 publications

SiO₂ Nanostructure-Based Aerogels with High Strength and Deformability for Thermal Insulation

SiO₂ Nanostructure-Based Aerogels with High Strength and Deformability for Thermal Insulation

Combination of an Asphalt Stabilizer and a Cellulose–Chitosan Composite Aerogel Used for the Separation of Oil–Water Mixtures Containing Asphalt

Highly Deformable High-Strength SiO₂ Aerogel Designed with an Alternating Structure of Hard Cores and Flexible Chains for Thermal Insulation

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Facile preparation of high strength aerogel based on polysulfonamide

Cited by 8 publications

References 12 publications

SiO2 Nanostructure-Based Aerogels with High Strength and Deformability for Thermal Insulation

SiO2 Nanostructure-Based Aerogels with High Strength and Deformability for Thermal Insulation

Combination of an Asphalt Stabilizer and a Cellulose–Chitosan Composite Aerogel Used for the Separation of Oil–Water Mixtures Containing Asphalt

Highly Deformable High-Strength SiO2 Aerogel Designed with an Alternating Structure of Hard Cores and Flexible Chains for Thermal Insulation

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Product

Resources

About

SiO₂ Nanostructure-Based Aerogels with High Strength and Deformability for Thermal Insulation

SiO₂ Nanostructure-Based Aerogels with High Strength and Deformability for Thermal Insulation

Highly Deformable High-Strength SiO₂ Aerogel Designed with an Alternating Structure of Hard Cores and Flexible Chains for Thermal Insulation