The preparation of hydrophobic alginate-based fibrous aerogel and its oil absorption property

Meng, Chihan; Zhang, Hong; Zhang, Sen; Guo, Jing; Zou, Xinquan

doi:10.1007/s10971-018-4748-1

Cited by 18 publications

(7 citation statements)

References 17 publications

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“…Therefore, researchers have tried to continuously optimize pure sodium alginate aerogel. Hong Zhang et al 206 used sodium alginate (SA) and acrylamide (AM) as raw materials; after the hydrogel was prepared, it was chemically modified by immersion in a mixed solvent system of methyltrimethoxysilane/ethyl orthosilicate (TEOS)/ethanol, and then freeze-dried. The prepared aerogel had two microstructures, macroporous and mesoporous, the water contact angle was 106°, and it absorbed more than 65 times of its oil under the auxiliary power of the vacuum pump.…”

Section: Applications In Oil/water Separationmentioning

confidence: 99%

Natural polysaccharide-based aerogels and their applications in oil–water separations: a review

Guo

2022

J. Mater. Chem. A

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Section: Applications In Oil/water Separationmentioning

confidence: 99%

Natural polysaccharide-based aerogels and their applications in oil–water separations: a review

Guo

2022

J. Mater. Chem. A

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“…For comparison in work [14], the absorbent capacity for SA-Ca-Zr foam was in a similar range, while in work [15], the poly(lactic acid) materials have a significantly low absorption capacity. Both analyses were repeated three times, Based on [16], the C-H stretching vibration should be more visible after modification. However, the vibration appears to be subtle in C compared to A and B hence this explains the C sample present as hydrophilic meanwhile, the apparent C-H group has attributed to the A and B samples being hydrophobic.…”

Section: Contact Angle and Oil Absorption Analysismentioning

confidence: 99%

“…analysis. require higher temperatures due to the surface modification process [16]. Figure 3.3(b) shows the TGA curves of all the blends, with a decomposition temperature in the range of 220-400 ºC.…”

Section: Differential Scanning Calorimetry (Dsc) Thermal Analysis And...mentioning

confidence: 99%

Characteristics of alginate and soy protein isolates composite aerogels as oil absorbent

Roslan

Mustapa

Hanipah

et al. 2022

IOP Conf. Ser.: Mater. Sci. Eng.

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Treating oil spill occurrence is crucial because of the toxic effects on marine life and the environment. Hence, absorption is used for a low-cost oil recovery process, simple mechanism, and sustainability to mitigate such occurrence. Synthetic absorbent is always associated with its poor degradability, which may cause water to turn toxic. Natural materials have been foreseen as excellent absorbent due to their cost-effectiveness, sustainability, and less environmental harm. In this work, alginate/soy protein isolates (SPI) aerogels are synthesized, undergo surface modification with methyltrimethoxysilane (MTMS) and tetraethyl orthosilane (TEOS) solution, and then dried by supercritical CO2 at 110 ± 5 bar and 40 °C in 4h to produce aerogels absorbent. The synthesized absorbents were analyzed via FTIR, TGA, DSC, FESEM, contact angle and oil absorption analysis to determine their physical and chemical properties. Results demonstrated that the hydrophilic surface of the alginate/soy protein isolate could be tailored in a simple surface modification process. Its oil absorption capacity towards the engine oil can reach a range of 9.1-12.1 g/g, comparable to most reported natural absorbents. Thus, the findings in this study show that alginate/ SPI aerogels may have potential as an industry oil absorbent.

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“…[1] Aerogels demonstrate potential for energy harvesting and storage, [2][3][4] sensors, [5] catalysts, [6] environmental remediation, [7] thermal management, [8,9] and biomedical applications. [10,11] In recent years, an increasing number of studies have been reported on carbon/silicon aerogels, [12,13] polymers, [14] and biomass aerogels, [15] and several processes for preparing aerogels with different structures and properties have been reported, including cryogenic freeze-drying and supercritical drying methods. [16,17] However, these methods exhibit several drawbacks, such as complex preparation processes, high energy consumption, high material costs, difficulty in industrialization, and environmental pollution.…”

Section: Introductionmentioning

confidence: 99%

Carnauba Wax‐Assisted Preparation of Eco‐Friendly Aerogels by the Ambient Pressure Drying Method and their Applications for Photothermal Evaporation and Dye Wastewater Treatment

Ren

Dong

et al. 2023

Adv Materials Technologies

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In this study, a new, eco-friendly, and efficient method to prepare aerogels using nonchemically cross-linked agar gels is described. This new process could eventually facilitate the rapid, continuous, and large-scale production of porous and lightweight materials, as it does not require freeze-drying, supercritical drying, or environmentally harmful crosslinking chemicals. The reported preparation process relies entirely on targeted freezing, solvent exchange, and the ambient pressure drying of agar gels. The obtained results revealed that biomass aerogels with good shapes can be obtained by simple directional freezing and that the introduction of carnauba wax solutes can maintain a highly porous structure throughout the process. The directionally grown anisotropic gels with excellent void space, anisotropic thermal conductivity, and excellent mechanical compression properties demonstrate immense potential for water treatment, controlled release of active compounds, thermal insulation, and catalysis. PDA-loaded aerogels exhibit excellent performance for photothermal evaporation and dye wastewater treatment, with high evaporation rates and photothermal efficiencies of 2.83 kg m −2 h −1 and 92.27%, respectively, and a dye removal efficiency of 94.5%. Hence, these aerogels demonstrate immense potential for applications in water treatment.

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The preparation of hydrophobic alginate-based fibrous aerogel and its oil absorption property

Cited by 18 publications

References 17 publications

Natural polysaccharide-based aerogels and their applications in oil–water separations: a review

Natural polysaccharide-based aerogels and their applications in oil–water separations: a review

Characteristics of alginate and soy protein isolates composite aerogels as oil absorbent

Carnauba Wax‐Assisted Preparation of Eco‐Friendly Aerogels by the Ambient Pressure Drying Method and their Applications for Photothermal Evaporation and Dye Wastewater Treatment

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