High-hydrophobic ZIF-8@PLA composite aerogel and application for oil-water separation

Environmental remediation using green approaches for addressing various pollution-related issues, especially water pollution, is in high demand. Here, we designed an environmentally friendly, low-cost, and stable sodium alginate–halloysite clay composite aerogel (SAHA) for oil/water separation via a two-step synthesis procedure, including ionic crosslinking and freeze-drying. The as-prepared SAHA aerogels were characterized in detail by scanning electron microscopy (SEM), atomic force microscopy (AFM), X-ray diffraction (XRD), and Fourier transformation infrared (FT-IR) spectroscopy. Characterization of the SAHA aerogels revealed a three-dimensional porous microstructure with uniformly dispersed halloysite nanotubes (HA) within the alginate matrix. The elemental composition of the hydrogels investigated using energy dispersive X-ray spectrometry (EDX) revealed the presence of minerals, such as magnesium, sodium, aluminum, and silicon in the SAHA aerogels. The presence of a hydrophilic alginate matrix combined with these unique morphological characteristics resulted in SAHA aerogels with underwater oleophobicity and excellent oil/water separation efficiency (up to 99.7%). The ease of fabrication, excellent oil/water separation, and multiple performances make the SAHA aerogel an interesting candidate for practical applications in water recycling.

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Underwater Superoleophobic and Salt-Tolerant Sodium Alginate/N-Succinyl Chitosan Composite Aerogel for Highly Efficient Oil–Water Separation

ACS Applied Polymer Materials ◽

10.1021/acsapm.9b00908 ◽

2020 ◽

Vol 2 (3) ◽

pp. 1124-1133

Author(s):

Cheng Wang ◽

Guanghua He ◽

Jilong Cao ◽

Lihong Fan ◽

Weiquan Cai ◽

...

Keyword(s):

Sodium Alginate ◽

Salt Tolerant ◽

Water Separation ◽

Composite Aerogel ◽

Highly Efficient ◽

Oil Water Separation ◽

Oil Water ◽

Chitosan Composite

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Facile Fabrication of Flexible Bacterial Cellulose/Silica Composite Aerogel for Oil/Water Separation

Bulletin of the Chemical Society of Japan ◽

10.1246/bcsj.20180106 ◽

2018 ◽

Vol 91 (7) ◽

pp. 1138-1140 ◽

Cited By ~ 10

Author(s):

Qidong Wang ◽

Taka-Aki Asoh ◽

Hiroshi Uyama

Keyword(s):

Bacterial Cellulose ◽

Water Separation ◽

Composite Aerogel ◽

Silica Composite ◽

Oil Water Separation ◽

Facile Fabrication ◽

Oil Water

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Polydopamine Induced Wettability Switching of Cellulose Nanofibers/n-Dodecanethiol Composite Aerogels

International Journal of Polymer Science ◽

10.1155/2022/5048717 ◽

2022 ◽

Vol 2022 ◽

pp. 1-9

Author(s):

Runan Gao ◽

Ying Shang ◽

Peng Jiao ◽

Yue Jiao ◽

Jian Li ◽

...

Keyword(s):

Cellulose Nanofibers ◽

Absorption Capacity ◽

Water Mixture ◽

The Novel ◽

Water Contact ◽

Water Separation ◽

Composite Aerogel ◽

Composite Aerogels ◽

Oil Water Separation ◽

Oil Water

The novel wettability switchable cellulose nanofiber- (CNF-) based aerogel was conveniently prepared by polydopamine mediated composition of CNF and n-dodecanethiol. The wettability of aerogels can be controlled by adjusting the PDA and n-dodecanethiol loading content, which leads to a variation of water contact angle from 0-149°. The PDA was coated on cellulose nanofibers via hydrogen bonds and then n-dodecanethiol was anchored onto the scaffolds by Michael addition reaction, which was revealed by XPS and FTIR spectra. The composite aerogel can selectively absorb a series of oily liquids from the oil/water mixture, with the maximum absorption capacity of 68 g/g. This work presented a facile strategy to prepare wettability switchable CNF-based heterogenous aerogel and exhibited the potential of the composite aerogel for oil/water separation.

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