Fully organic and biodegradable superhydrophobic sponges derived from natural resources for efficient removal of oil from water

Su，Xiaojing1; Yang，Weihua1; Li，Kunquan1; Xie，Huali1; Wu，Yunhui1; Li，Yuanfa1; Xie，Xin2; Wu，Wenjian1

2021-12-15

10.1016/j.seppur.2021.119411

SEPARATION AND PURIFICATION TECHNOLOGY   影响因子和分区

1383-5866

1873-3794

Facile fabrication of functional superhydrophobic porous materials with full biodegradability for efficient removal of oily pollutants from water has been of considerable interest for its great significance in environmental protection. Herein, a fully organic and biodegradable superhydrophobic sponge is fabricated with carnauba wax (CW) via dip-coating, nonsolvent induced phase separation and spraying processes on a freeze-dried pomelo peel. The as-fabricated sponge was covered with flower-shaped patterns aggregated by CW nanosheets, and presented great water repellency with a contact angle of 154°. Thanks to the 3D porous architecture and superhydrophobicity/superoleophilicity, the sponge exhibited great oil absorptive capacity, oil selectivity, separation efficiency and reusability for immiscible oil/water mixtures. Interestingly, the multi-layer compressed sponges realized gravity-driven surfactant-stabilized water-in-oil emulsion separation with high permeation flux of up to 5729 L·m·h and excellent efficiency of oil purity larger than 99.9%. Importantly, the superhydrophobic sponge was derived from cheap renewable natural resources, and capable of being completely biodegraded after discarding. The findings conceivably stand out as a new tool to fabricate superhydrophobic materials with sustainability and biodegradability for oil accidents and industrial sewage emissions.

Biodegradability Carnauba wax Oil/water separation Pomelo peel Superhydrophobic sponge

SCI ; EI

英语

通讯

National Nature Science Foundation of China[51903059] ; Special Project for Key Areas of Guangdong Higher Education Institutions, China[2020ZDZX2024] ; Guangdong Basic and Applied Basic Research Foundation, China[2019A1515110343] ; National Training Program of Innovation and Entrepreneurship for Undergraduates, China[202011819017]

Engineering

Engineering, Chemical

WOS:000701641800002

ELSEVIER

20213410808743

Biodegradability ; Contact angle ; Efficiency ; Emulsification ; Emulsions ; Fabrication ; Phase separation ; Reusability ; Sewage ; Sustainable development ; Water pollution

Sewage:452.1 ; Water Pollution:453 ; Thermodynamics:641.1 ; Biochemistry:801.2 ; Chemical Operations:802.3 ; Chemical Products Generally:804 ; Production Engineering:913.1 ; Physical Properties of Gases, Liquids and Solids:931.2

CHEMISTRY

2-s2.0-85113197844

Scopus

1.School of Materials Science and Engineering,Dongguan University of Technology,Dongguan,523808,China
2.The First Affiliated Hospital (Shenzhen People's Hospital),Southern University of Science and Technology,Shenzhen,518055,China

Su，Xiaojing,Yang，Weihua,Li，Kunquan,et al. Fully organic and biodegradable superhydrophobic sponges derived from natural resources for efficient removal of oil from water[J]. SEPARATION AND PURIFICATION TECHNOLOGY,2021,277.

Su，Xiaojing.,Yang，Weihua.,Li，Kunquan.,Xie，Huali.,Wu，Yunhui.,...&Wu，Wenjian.(2021).Fully organic and biodegradable superhydrophobic sponges derived from natural resources for efficient removal of oil from water.SEPARATION AND PURIFICATION TECHNOLOGY,277.

Su，Xiaojing,et al."Fully organic and biodegradable superhydrophobic sponges derived from natural resources for efficient removal of oil from water".SEPARATION AND PURIFICATION TECHNOLOGY 277(2021).