Oil/water separation by super-hydrophobic wastepaper cellulose-candelilla wax cryogel: a circular material-based alternative
Por:
Romero-Montero, A, Rosas-Melendez, SA, Valencia-Bermúdez, JL, Nuñez-Tapia, I, Piña-Barba, MC, Melgoza-Ramírez, LJ, Leyva-Gómez, G, Del Prado-Audelo, ML
Publicada:
14 dic 2023
Categoría:
Materials science (miscellaneous)
Resumen:
Introduction: One of the most attractive fields for cellulose aerogels is water remediation, basically in the pollutant's adsorption and oil/water separation. There are different sources to extract cellulose, but the extraction from paper waste is an excellent option for impulse circular materials applications.Methods: We obtained cellulose from office waste paper through a simple alkali method and used it to fabricate an aerogel by freeze-drying based on the materials' circularity. To increase lipophilicity, the aerogel was modified using two different coatings: polycaprolactone (WOPP) and candelilla wax (WOPW), extracted from a Mexican plant. The aerogels were analyzed by several physicochemical techniques such as Scanning Electronic Microscopy, Infrared spectroscopy, and thermal analysis.Results and Discussion: To our knowledge, this is the first time that candelilla wax has been reported as aerogel modification. The highly porous aerogels showed a density of around 0.1 g/cm3 and a fibrous structure. Furthermore, the contact angle of the aerogels was measured to compare the hydrophobicity of the surfaces, showing values around 120 degrees in the modified aerogels compared with the hydrophilic behavior of pristine cellulose aerogel. The achieved recycled mineral oil absorption capacity for WOPW was 6.1 g/g, while for WOPP was 4.88 g/g. Thus, we obtained a natural coating aerogel with a high water/oil separation potential.
Filiaciones:
Romero-Montero, A:
Univ Nacl Autonoma Mexico, Fac Quim, Ciudad Univ, Mexico City, Mexico
Rosas-Melendez, SA:
Tecnol Monterrey, Escuela Ingn & Ciencias, Mexico City, Mexico
Valencia-Bermúdez, JL:
Tecnol Monterrey, Escuela Ingn & Ciencias, Mexico City, Mexico
Nuñez-Tapia, I:
Univ Nacl Autonoma Mexico, Inst Invest Mat, Ciudad Univ, Mexico City, Mexico
Piña-Barba, MC:
Univ Nacl Autonoma Mexico, Inst Invest Mat, Ciudad Univ, Mexico City, Mexico
Melgoza-Ramírez, LJ:
Tecnol Monterrey, Escuela Ingn & Ciencias, Mexico City, Mexico
Leyva-Gómez, G:
Univ Nacl Autonoma Mexico, Fac Quim, Ciudad Univ, Mexico City, Mexico
Del Prado-Audelo, ML:
Tecnol Monterrey, Escuela Ingn & Ciencias, Mexico City, Mexico
gold, All Open Access; Gold Open Access
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