Preparation of a new superhydrophobic/superoleophilic corn straw fiber used as an oil absorbent for selective absorption of oil from water

Abstract

Background

Oil leakages frequently occur during oil product development and oil transportation. These incidents are a vital factor in water contamination, thus leading to serious environmental destruction. Therefore, superhydrophobic/superoleophilic material is one of the solutions to treat oily wastewater.

Results

This study aimed to develop a simple, fast and low-cost method to treat oily wastewater by synthesizing a new superhydrophobic/superoleophilic corn straw fiber via conventional impregnation. The corresponding results illustrate that abundant homogeneous silica (SiO₂) granules evenly accreted on the surface of the prepared fiber were conducive to high surface roughness. Meanwhile, (Heptadecafluoro-1,1,2,2-tetradecyl) trimethoxysilane, a sort of silane coupling agent, could greatly reduce surface free energy by grafting with SiO₂ particles on the corn straw fiber surface. The obtained superhydrophobic/superoleophilic corn straw fiber exhibited a water contact angle of 152° and an oil contact angle of 0° for various oils, strongly demonstrating its considerable application as an oil absorbent that can be applied for oil cleanup. In addition, the prepared fiber displayed a great chemical stability and environmental durability.

Conclusions

Due to its high absorption capacity and absorption efficiency, the prepared fiber has great potential as a new oil absorbent for treatment of oily water.

Keywords

Oil absorption / Corn straw / Superhydrophobic / Superoleophilicity / SiO₂ particles

References

[1] Angelova D, Uzunov I, Uzunova S, Gigova A, Minchev L. Kinetics of oil and oil products adsorption by carbonized rice husks. Chem Eng J, 2011, 172(1): 306-311.

[2] Autumn K, Liang YA, Hsieh ST, Zesch W, Chan WP, Kenny TW, Fearing R, Full RJ. Adhesive force of a single gecko foot-hair. Nature, 2000, 405: 681.

[3] Boopathy R, Shields S, Nunna S. Biodegradation of crude oil from the BP oil spill in the marsh sediments of Southeast Louisiana USA. Appl Biochem Biotechnol, 2012, 167(6): 1560-1568.

[4] Cojocaru C, Macoveanu M, Cretescu I. Peat-based sorbents for the removal of oil spills from water surface: application of artificial neural network modeling. Colloids Surf A Physicochem Eng Asp, 2011, 384(1): 675-684.

[5] Deng D, Prendergast DP, MacFarlane J, Bagatin R, Stellacci F, Gschwend PM. Hydrophobic meshes for oil spill recovery devices. ACS Appl Mater Interfaces, 2013, 5(3): 774-781.

[6] Gan W, Gao L, Zhang W, Li J, Cai L, Zhan X. Removal of oils from water surface via useful recyclable CoFe₂O₄/sawdust composites under magnetic field. Mater Design, 2016, 98: 194-200.

[7] Gao J, Liu Y, Xu H, Wang Z, Zhang X. Mimicking biological structured surfaces by phase-separation micromolding. Langmuir, 2009, 25(8): 4365-4369.

[8] Guo P, Zhai S, Xiao Z, An Q. One-step fabrication of highly stable, superhydrophobic composites from controllable and low-cost PMHS/TEOS sols for efficient oil cleanup. J Colloid Interface Sci., 2015, 446(Supplement C): 155-162.

[9] Howarter JA, Youngblood JP. Self-cleaning and anti-fog surfaces via stimuli-responsive polymer brushes. Adv Mater, 2007, 19(22): 3838-3843.

[10] Hsieh C-T, Chen W-Y, Wu F-L, Hung W-M. Superhydrophobicity of a three-tier roughened texture of microscale carbon fabrics decorated with silica spheres and carbon nanotubes. Diam Relat Mater, 2010, 19(1): 26-30.

[11] Ju J, Bai H, Zheng Y, Zhao T, Fang R, Jiang L. A multi-structural and multi-functional integrated fog collection system in cactus. Nat Commun, 2012, 3: 1247.

[12] Karakasi OK, Moutsatsou A. Surface modification of high calcium fly ash for its application in oil spill clean up. Fuel, 2010, 89(12): 3966-3970.

[13] Kim H, Noh K, Choi C, Khamwannah J, Villwock D, Jin S. Extreme superomniphobicity of multiwalled 8 nm TiO2 nanotubes. Langmuir, 2011, 27(16): 10191-10196.

[14] Kulkarni SA, Ogale SB, Vijayamohanan KP. Tuning the hydrophobic properties of silica particles by surface silanization using mixed self-assembled monolayers. J Colloid Interface Sci, 2008, 318(2): 372-379.

[15] Li Y, Li L, Sun J. Bioinspired self-healing superhydrophobic coatings. Angew Chem, 2010, 122(35): 6265-6269.

[16] Liang W, Guo Z. Stable superhydrophobic and superoleophilic soft porous materials for oil/water separation. RSC Adv, 2013, 3(37): 16469-16474.

[17] Liu F, Ma M, Zang D, Gao Z, Wang C. Fabrication of superhydrophobic/superoleophilic cotton forapplication in the field of water/oil separation. Carbohyd Polym, 2014, 103: 480-487.

[18] Ribeiro TH, Rubio J, Smith RW. A dried hydrophobic aquaphyte as an oil filter for oil/wateremulsions. Spill Sci Technol, 2003, 8(5–6): 483-489.

[19] Saito M, Ishii N, Ogura S, Maemura S, Suzuki H. Development and water tank tests of sugi bark sorbent (SBS). Spill Sci Technol, 2003, 8(5–6): 475-482.

[20] Schaum J, Cohen M, Perry S, Artz R, Draxler R, Frithsen JB, Heist D, Lorber M, Phillips L. Screening level assessment of risks due to dioxin emissions from burning oil from the BP deepwater horizon Gulf of Mexico spill. Environ Sci Technol, 2010, 44(24): 9383-9389.

[21] Vinogradova E, Estrada M, Moreno A. Colloidal aggregation phenomena: spatial structuring of TEOS-derived silica aerogels. J Colloid Interface Sci, 2006, 298(1): 209-212.

[22] Vlaev L, Petkov P, Dimitrov A, Genieva S. Cleanup of water polluted with crude oil or diesel fuel using rice husks ash. J Taiwan Inst Chem Eng, 2011, 42(6): 957-964.

[23] Wang L, Yang S, Wang J, Wang C, Chen L. Fabrication of superhydrophobic TPU film for oil–water separation based on electrospinning route. Mater Lett, 2011, 65(5): 869-872.

[24] Wang S, Liu C, Liu G, Zhang M, Li J, Wang C. Fabrication of superhydrophobic wood surface by a sol–gel process. Appl Surf Sci, 2011, 258(2): 806-810.

[25] Wang B, Li J, Wang G, Liang W, Zhang Y, Shi L, Guo Z, Liu W. Methodology for robust superhydrophobic fabrics and sponges from in situ growth of transition metal/metal oxide nanocrystals with thiol modification and their applications in oil/water separation. ACS Appl Mater Interfaces, 2013, 5(5): 1827-1839.

[26] Wang S, Liu K, Yao X, Jiang L. Bioinspired surfaces with superwettability: new insight on theory, design, and applications. Chem Rev, 2015, 115(16): 8230-8293.

[27] Wei ZJ, Liu WL, Tian D, Xiao CL, Wang XQ. Preparation of lotus-like superhydrophobic fluoropolymer films. Appl Surf Sci, 2010, 256(12): 3972-3976.

[28] Yao X, Song Y, Jiang L. Applications of bio-inspired special wettable surfaces. Adv Mater, 2011, 23(6): 719-734.

[29] Yuan Z, Wang X, Bin J, Peng C, Xing S, Wang M, Xiao J, Zeng J, Xie Y, Xiao X, Fu X, Gong H, Zhao D. A novel fabrication of a superhydrophobic surface with highly similar hierarchical structure of the lotus leaf on a copper sheet. Appl Surf Sci, 2013, 285(Part B): 205-210.

[30] Zang D, Liu F, Zhang M, Niu X, Gao Z, Wang C. Superhydrophobic coating on fiberglass cloth for selective removal of oil from water. Chem Eng J, 2015, 262: 210-216.

[31] Zang D, Zhang M, Liu F, Wang C. Superhydrophobic/superoleophilic corn straw fibers as effective oil sorbents for the recovery of spilled oil. J Chem Technol Biotechnol, 2016, 91(9): 2449-2456.

[32] Zhang Y, Wang H, Yan B, Zhang Y, Yin P, Shen G, Yu R. A rapid and efficient strategy for creating super-hydrophobic coatings on various material substrates. J Mater Chem, 2008, 18(37): 4442-4449.

[33] Zhang W, Shi Z, Zhang F, Liu X, Jin J, Jiang L. Superhydrophobic and superoleophilic PVDF membranes for effective separation of water-in-oil emulsions with high flux. Adv Mater, 2013, 25(14): 2071-2076.

[34] Zhou X, Zhang Z, Xu X, Guo F, Zhu X, Men X, Ge B. Robust and durable superhydrophobic cotton fabrics for oil/water separation. ACS Appl Mater Interfaces, 2013, 5(15): 7208-7214.