4.7 Article

Superhydrophobic aerogel membrane with integrated functions of biopolymers for efficient oil/water separation

Journal

SEPARATION AND PURIFICATION TECHNOLOGY
Volume 282, Issue -, Pages -

Publisher

ELSEVIER
DOI: 10.1016/j.seppur.2021.120138

Keywords

Lignin; Aerogel membrane; Superhydrophobic; Biopolymers; Oil/water separation

Funding

  1. National Natural Science Foundation of China [22178037]
  2. Liaoning Revitalization Talents Program [XLYC2002114]
  3. Innovative talents in Liaoning universities and colleges [LR2017045]
  4. Dalian Leading Talents Project [2018-192]

Ask authors/readers for more resources

A novel type of superhydrophobic biopolymer aerogel membrane was prepared using freeze-casting technique and subsequent chemical vapor deposition. The membrane exhibited excellent oil/water separation and oil sorption performance, providing new insights for designing task-specific functional materials.
Superhydrophobic membranes have been playing crucial role in efficient remediation of organic pollutants contaminated water, especially for oily discharged wastewater. Taking advantages of the inherent features of graphene oxide (GO), sodium alginate (SA) and lignin, a novel type of superhydrophobic biopolymer aerogel membrane (T-SA/lignin(x)/rGO-MTMS) was prepared by freeze-casting technique and subsequent chemical vapor deposition, during which trimethoxymethylsilane (MTMS) silylation growth was achieved for the supreme protuberance, leading to the formation of rough and hydrophobic surface that favorably looks like a hedgehog carrying apples. Due to the air cushion induced by cooperative interaction between rough lignin particles and SA of 3D porous network with gas as a dispersion medium, and crumpled GO nanosheets, as-fabricated membrane with integrated functions of biopolymers possessed superhydrophobic surface characteristics (WCA = 161 degrees). More favorably, utilizing the inherent molecular features, lignin has been successfully employed to de-oxidize GO during this preparative concept. By virtue of the low-surface-energy reduced GO (rGO) and abundant protuberance, T-SA/lignin(x)/rGO-MTMS exhibited potential cycling performance even with 10 cycles of oil/water separation and oil sorption. This study might shed light on the value-added utilization of integrated functions of biopolymers for designing task-specific functional materials for various applications.

Authors

I am an author on this paper
Click your name to claim this paper and add it to your profile.

Reviews

Primary Rating

4.7
Not enough ratings

Secondary Ratings

Novelty
-
Significance
-
Scientific rigor
-
Rate this paper

Recommended

No Data Available
No Data Available