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Surface hydrophobization of polyester fibers with poly(methylhydro-dimethyl)siloxane copolymers: Experimental design for testing of modified nonwoven materials as oil spill sorbents |
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| Institution: | 1. Toray Research Center, Inc., Otsu, 520-8567, Japan;2. Application R&D Center, Horiba Ltd., Kyoto, 601-8510, Japan;3. Rakuyo Giken Co., Ltd., Kumiyama-cho, Kyoto, 613-0023, Japan;4. Graduate School of Science, Hiroshima University, Higashihiroshima, 739-8526, Japan;1. Department of Polymer Science & Engineering, Hannam University, Daejeon 34054, Republic of Korea;2. Underground Solutions Inc., Poway, CA 92064, USA;3. Ansco Inc., Daejeon 34051, Republic of Korea;1. Institute of Building Construction and Technology, TU Wien, Karlsplatz 13/206-4, 1040 Vienna, Austria;2. Department of Orthopaedic Surgery, Medical University of Vienna, Waehringer Guertel 18-20, 1090 Vienna, Austria;3. Department of Mechanical Engineering, The University of Memphis, Memphis, TN 38152, USA;4. Institute of Solid State Physics, TU Wien, Karlsplatz 13/138-4, 1040 Vienna, Austria |
| Abstract: | This paper reports on the hydrophobization of polyester fibrous nonwoven with poly(methylhydro-dimethyl)siloxane copolymers in order to produce water-repellent sorbents for oil spill cleanup. Polysiloxane copolymers were first synthesized and characterized prior to be used as hydrophobization agents. The produced hydrophobic sorbents were characterized by scanning electron microscopy coupled with energy-dispersive X-ray spectroscopy (SEM/EDX); infrared spectra (FTIR) and water-contact angle measurements (WCA). Nonwoven sorbents were evaluated for oil sorption in pure oil bath and in the presence of water (W-test). A statistical experiment design was employed for materials testing and the development of data-driven models. The optimal hydrophobic nonwoven yielded maximal sorption capacities equal to 5.52 g/g and 10.03 g/g for dodecane and motor oil uptake, respectively. The mechanism of oil attachment on polymeric fibers was investigated by optical microscopy revealing a key role of inter-fiber voids for oil retention. Centrifugation tests demonstrated a high recycling ability of spent nonwoven sorbents. |
| Keywords: | Polyester nonwoven Polysiloxane copolymer Hydrophobization Oil spill sorbent Response surface methodology |
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