Journal
SEPARATION AND PURIFICATION TECHNOLOGY
Volume 253, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.seppur.2020.117495
Keywords
Urushiol; Cotton; Corrosion resistance; Oil-water separation
Categories
Funding
- Natural Science Foundation of Fujian Province [2019J01262]
- Open Project Program of Fujian Engineering and Research Center of New Chinese lacquer Materials, Minjiang University [323030030702]
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A natural acid-alkali-salt resistant urushiol@TiO2 coated cotton fabric with a high water contact angle of 146.1 +/- 0.3 degrees was designed employing a facial immersion method. The as-prepared urushiol@TiO2 coated cotton not only has excellent stability toward UV irradiation and high temperature, but also exhibits great resistance to mechanical abrasion and acid-base solutions with various pH values. More importantly, while the pristine cotton fabric was penetrated and even destroyed by acid or base solutions immediately, the urushiol@TiO2 structures protected the coated cotton from penetration by high acid (10 M H2SO4 for 70 min and 1 M H2SO4 for more than 18 h) and high base (10 M NaOH for 70 min and 1 M NaOH for more than 18 h) solutions. The sharp contract indicates the potential of urushiol@TiO2 coated fabric to be used in some extreme conditions. Therefore, the as-prepared urushiol@TiO2 coated fabric was found to not only act as a high performance filter to separate oil-water mixtures with superior reusability, but also retain high separation efficiency separating oil-water mixtures in highly acidic (10 M H2SO4), alkaline (10 M NaOH), and salty (saturated NaCl) environments, as well as oil-in-water and water-in-oil emulsions. The modified fabric is environmentally friendly, and easy to fabricate with low cost, offering promising potential applications in resolving the serious issues of oily wastewater treatment and anti-corrosion protection.
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