A Fiber-Aligned Thermal-Managed Wood-Based Superhydrophobic Aerogel for Efficient Oil Recovery

Abstract

The fabrication and performance of aerogelbased superabsorbents for oil are critically important material aspects. More specifically, efficient oil−water separation per unit time and cycle remains a challenge. Herein, an integrated, continuous, rapid, and highly recyclable oil−water separation and recycle system has been developed by use of an anisotropic wood aerogel possessing a layered structure obtained using a top-down fabrication strategy followed by freeze-drying. Specifically, a superhydrophobic aerogel with a thermal management function was developed through chemical vapor deposition (CVD) and novel splicing with carbon nanotubes (CNTs). The lipophilicity of the modified wood aerogel in conjunction with an intrinsic CNT photothermal effect provided an optimal juxtaposition of adsorption, fast volatilization, and accelerated purification characterized by continuous removal of the oil from the aerogel in a gaseous form so the aerogel was prevented from reaching its own oil absorption saturation point. A recovery chamber was designed with a sandwich structure to allow the gaseous oil to be ultraeffectively collected. Additionally, the as-fabricated aerogel displayed strong bactericidal function from activated oxygen released during the photothermal heating.

Graphene wrapped wood-based phase change composite for efficient electro-thermal energy conversion and storage

“…S2). It was in accordance with the FT-IR result, fully demonstrating the removal of lignin (Seki et al 2018;Zhu et al 2019). In addition, after the impregnation of TD under vacuum, the main peaks of pure TD including the rocking vibration of CH 3 at 723 cm -1 and the stretching vibration of C-H at 2850 and 2918 cm -1 arose in the spectrum of TD/ rGO@DW, illustrating that TD was successfully filled into the interior of rGO@DW (Yang et al 2018a).…”

Versatile Strategy for the Preparation of Woody Biochar with Oxygen-Rich Groups and Enhanced Porosity for Highly Efficient Cr(VI) Removal

“…In particular, the preserved cellulose fibers stacked into a layer stacking structure due to strong intermolecular forces ( Figure 2 c), consequently resulting in the destruction of the cellular lumina without structure disassembly, which is expected to increase the porosity and the solution permeability. 25 , 26 …”

Nanocellulose-based composite materials for wastewater treatment and waste-oil remediation

“…By in situ forming Pd NPs within the lumens of wood cells (wood species: basswood), the water treatment rate of the 3D Pd NPs/wood membrane reached 1 × 10 5 L• m −2 •h − 1 with a high MB removal efficiency (>99.8%). [58] Zhu et al [59] fabricated a superhydrophobic carbon nanotubes (CNTs)/wood aerogel for efficient oil recovery. This CNTs/wood aerogel is different from the abovementioned nanocellulose aerogel materials.…”

“…The lipophilicity of the modified wood aerogel in conjunction with an intrinsic CNT photothermal effect provided an optimal juxtaposition of adsorption, fast volatilization, and accelerated purification characterized by continuous removal of the oil from the aerogel in a gaseous form. [59] An asymmetric wood with wettability gradient along the wood channels and directional liquid transport property was developed by Luo et al [60] Raw softwood slices (1.8 mm in thickness and 30 mm in diameter) were first carbonized at 180 °C. Then one face of carbonized wood (CW) slice was treated by spraying polydimethylsiloxane (PMDS) solution with 1% concentration for several seconds (3, 6, 9, 12 s).…”