Synthesis of the Permselective Polymer Thin Films by Plasma Polymerization Method and its Application to the Separation Technology
| Project/Area Number |
59850153
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| Research Category |
Grant-in-Aid for Developmental Scientific Research
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| Allocation Type | Single-year Grants |
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| Research Field |
化学工学
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| Research Institution | Kitakyushu National College of Technology |
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Principal Investigator |
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| Project Period (FY) |
1984 – 1985
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| Project Status |
Completed (Fiscal Year 1985)
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| Budget Amount *help |
¥3,600,000 (Direct Cost: ¥3,600,000)
Fiscal Year 1985: ¥1,700,000 (Direct Cost: ¥1,700,000)
Fiscal Year 1984: ¥1,900,000 (Direct Cost: ¥1,900,000)
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| Keywords | plasma polymerization / thin film / gas separation / hexamethyldisiloxane / hexafuluorobenzene / crosslinking / complexing group / 金属イオン抽出 |
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| Research Abstract |
Plasma polymerization was studied to synthesize the organic thin films which is applicable to the separation processes. At first, in the case of gas separation membranes, two kinds of monomers used were hexamethyldisiloxane (HMDS), and hexafluorobenzene (HFB). Plasma polymerized films were deposited on the substrates of Millipore VS, polysulfone hollow fibers and porous ceramics. The aggregation structures and permeation properties of plasma-polymerized thin films were investigated as functions of the discharge energy W/FM, the substrate temperature and the annealing time after deposition, where W,F, and M are the RF power, the monomer flow rate and the molecular weight of monomer, respectively. The chemical and aggregation structures of the films were investigated on the basis of TG, FT-IR, and ESCA. The rough structure composed of unsaturated bond or aromatic group changed into the highly cross-linked network structure with increases in the W/FM value. The magnitude of gas separation factor through the plasma-polymerized-film increased with an increase in the degree of crosslinking. The oxygen permeability coefficient through the plasma-polymerized HFB (PHFB) film remained almost constant at about 2.8 x <10^(-8)> <cm^3> (STP)/cm. sec.cmHg from nitrogen decreased gradually from the magnitude of 4.5 at 283 K with an increase in temparature. These results shows that the PHFB film is advantageous for the membrane for oxygen enrichment. It was also found that the plasma-polymerized HMDS film was suitable for the hydrogen separation membrane. Secondarily, as the first step of investigation for introducing complexing groups onto the surface of substrates by plasma-treatment, the phosphonium salts were synthesized and used to extract anionic metal complexes. Consequently, it was found that these reagents are suitable for extraction and separation of metal ions.
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Report
(1 results)
Research Products
(10 results)
