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Functional Fibrous Materials for Oil-Water Separation
http://hdl.handle.net/10212/2628
http://hdl.handle.net/10212/262882507b19-3412-4083-ae19-f7d0ddf4d595
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内容の要約 (188.5 KB)
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内容・審査結果の要旨 (177.8 KB)
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| Item type | 学位論文 / Thesis or Dissertation(1) | |||||||||
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| 公開日 | 2024-08-08 | |||||||||
| タイトル | ||||||||||
| タイトル | Functional Fibrous Materials for Oil-Water Separation | |||||||||
| 言語 | en | |||||||||
| その他のタイトル | ||||||||||
| その他のタイトル | 機能性繊維を用いた油水分離膜 | |||||||||
| 言語 | ja | |||||||||
| 作成者 |
ドアン ゴック ホアン
× ドアン ゴック ホアン
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| アクセス権 | ||||||||||
| アクセス権 | open access | |||||||||
| アクセス権URI | http://purl.org/coar/access_right/c_abf2 | |||||||||
| 主題 | ||||||||||
| 言語 | en | |||||||||
| 主題Scheme | Other | |||||||||
| 主題 | Fibers | |||||||||
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| 言語 | en | |||||||||
| 主題Scheme | Other | |||||||||
| 主題 | Centrifugal spinning | |||||||||
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| 言語 | en | |||||||||
| 主題Scheme | Other | |||||||||
| 主題 | Electrospinning | |||||||||
| 主題 | ||||||||||
| 言語 | en | |||||||||
| 主題Scheme | Other | |||||||||
| 主題 | Oil-water separation | |||||||||
| 内容記述 | ||||||||||
| 内容記述タイプ | Abstract | |||||||||
| 内容記述 | Oil-water separation has attracted much attention as a technology for preventing frequent oil spills and the increase of oily wastewater from the industry, which has a possibility of significant damage to the ecosystem and human health. The compositions of oil-water mixture encountered in the oil spills and industrial processes vary wildly depending on the source of pollutions. Three main categories of oil-water mixtures are free oil, immiscible oil-water mixture, and emulsified oil-water mixture. This variety of oil-water sources challenges the application of separation techniques. Among the separation materials, micro/nanoscale fibrous materials are potential candidates due to their facile fabrication and functionalization, high flexibility, and high separation performance. Centrifugal spinning and electrospinning are facile methods for producing micro/nanofibers and a high potential for achieving the above research objectives. In this study, porous fibers were prepared from hydrophobic polymer polystyrene by centrifugal spinning, and the removal of free oil was investigated. The porous structure of PS fibers caused by the phase separation process can be controlled using different solvent mixtures. The porous PS fibers showed a high oil sorption capacity.Nanofibrous membranes based on recycled poly(ethylene terephthalate) (rPET) were prepared by electrospinning to separate immiscible and emulsified oil-water mixture. The water intrusion pressure and anti-water fouling properties were enhanced by a dip-coated as-spun rPET membrane with hydrophobic polymer polydimethylsiloxane (PDMS). The rPET@PDMS membrane exhibited excellent fluxes and separation efficiencies for immiscible heavy-oil/water mixtures.In order to prepare an environmentally friendly membrane with on-demand separation property for both immiscible and emulsified oil-water mixture, an electrospun membrane using biodegradable polymers based on polycaprolactone (PCL) and chitosan (CS) were investigated. The obtained CS@PCL membrane showed superamphiphilic in air, underoil superhydrophobic, and underwater superoleophobic, as well as excellent wettability, which enabled the oil-water separation process to be controlled by the prewetting technique. Besides, the CS@PCL membrane showed excellent separation performance for both immiscible oil-water mixtures and emulsions.In summary, different fiber fabrication techniques were applied to prepare fibrous materials from various polymers with different wettability for separating different oil-water mixtures. In order to achieve the fibers with different required properties, various approaches were performed, including controlling the phase separation process, dip-coating, and blending of different polymers. Centrifugal spinning productivity is much higher than that of electrospinning, making centrifugally spun fibers more efficient than electrospun fibers for practical free oil removal. However, electrospinning is a preferable method for preparing a homogeneous membrane with a relatively small pore size, which is suitable for separating oil-water mixture with small dispersed droplets such as immiscible and emulsified oil-water mixtures. | |||||||||
| 言語 | en | |||||||||
| 日付 | ||||||||||
| 日付 | 2021-03-25 | |||||||||
| 日付タイプ | Issued | |||||||||
| 言語 | ||||||||||
| 言語 | eng | |||||||||
| 資源タイプ | ||||||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_db06 | |||||||||
| 資源タイプ | doctoral thesis | |||||||||
| 学位授与番号 | ||||||||||
| 学位授与番号 | 甲第988号 | |||||||||
| 学位名 | ||||||||||
| 言語 | ja | |||||||||
| 学位名 | 博士（工学） | |||||||||
| 学位授与年月日 | ||||||||||
| 学位授与年月日 | 2021-03-25 | |||||||||
| 学位授与機関 | ||||||||||
| 学位授与機関識別子Scheme | kakenhi | |||||||||
| 学位授与機関識別子 | 14303 | |||||||||
| 言語 | ja | |||||||||
| 学位授与機関名 | 京都工芸繊維大学 | |||||||||
