期刊
CHEMICAL ENGINEERING JOURNAL
卷 390, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2020.124607
关键词
Porous materials; Posidonia; Seaweed; Biopolymers; Oil sorption; Microstructure
资金
- Spanish Ministry of Science, Innovation and Universities [RTI2018094408-J-I00]
- Agencia Estatal de Investigacion
- European Union's Horizon 2020 research and innovation programme (ERA-Net SUSFOOD2)
- Polytechnic University of Valencia (UPV)
Lightweight, hydrophobic, adsorbent pads based on aerogels from different cellulosic and nanocellulosic fractions extracted from Posidonia oceanica waste biomass were developed by a simple freeze-drying and PLA dipping method. The pure (nano)cellulosic aerogels presented highly porous structures, capable of adsorbing large amounts of oil (up to similar to 34 g oil/g aerogel); however, they lost their integrity when soaked in water. The incorporation of PLA hydrophobized the aerogels and improved significantly their mechanical performance (up to 10-fold increase in the compression stress). The most porous aerogel structures, obtained with the lowest (nano) cellulosic concentrations and with the less purified fractions, incorporated greater amounts of PLA upon dipping, which was mostly distributed filling in the pores. All the PLA-coated (nano)cellulosic aerogels presented a hydrophobic behaviour, with contact angles of 95-130 degrees and selectively adsorbing greater amounts of oil (5.9-9.2 g oil/g aerogel) than water (2.8-6.7 g H2O/g aerogel). These materials present a great potential as adsorbent pads for oil spill cleaning and food packaging applications.
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