| Project/Area Number |
04453109
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| Research Category |
Grant-in-Aid for General Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
高分子物性・高分子材料（含機械材料）
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| Research Institution | Waseda University |
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Principal Investigator |
NISHIDE Hiroyuki Waseda Univ.Polymer Chem.Prof., 理工学部, 教授 (90120930)
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| Co-Investigator(Kenkyū-buntansha) |
SUZUKI Takayuki Waseda Univeraity Polymer Chem.Assis., 理工学部, 助手 (20257215)
TSUCHIDA Eishun Waseda Univ.Polymer Chem.Prof., 理工学部, 教授 (90063461)
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| Project Period (FY) |
1992 – 1994
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| Project Status |
Completed (Fiscal Year 1994)
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| Budget Amount *help |
¥6,800,000 (Direct Cost: ¥6,800,000)
Fiscal Year 1994: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 1993: ¥1,200,000 (Direct Cost: ¥1,200,000)
Fiscal Year 1992: ¥4,600,000 (Direct Cost: ¥4,600,000)
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| Keywords | Polymer Membrane / Gas Permeation / Oxygen-permselective Membrane / Surface Diffusion / Chemically Specific Adsorption / Macromolecular Complex |
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| Research Abstract |
Molecular oxygen is dissolved into pokymer matrixes more than hundred times of the physically dissolved oxygen for macromolecular complexes, which is ascribed to chemically specific, rapid, and reversible oxygen-binding to the compelex moieties. Characteristics the polymers super-saturatrd with oxygen was first studied in view points of specific oxygen sorption at the gas-solid polymer interface, surface diffusion of oxygen on the polymer matrixes, and polymer property conjugated with the oxygen dissolution.
(1) Dissolved oxygen amount 3cm^3 (STP) /g (polymer) (at 25ﾟC under air atmosphere) into solid-atate cobaltporphyrin-bound polymers was estimated and analyzed with Langmuir's and Henry's isotherms. Oxygen-binding reactivity was controlled with the chemically modified structure of porphyrin, which was related to extra-large amount and rapid kinetics of oxygen sorption.
(2) Two-dimensional of surface diffusion of oxygen was first observed on a porous membrane modified on its pore surface with cobaltporphyrin. The membdrane displayd high permeability >10^4 Barrers and permselectively for oxygen -2. The enhanced and specific diffusion of oxygen was mathematically analyzed with a parallel model involving surface diffusion of oxygen and gas phase diffusion, to yield permeability -10^3 Barrers for the surface diffusion layr and surface diffusion constant of oxygen 10^<-4> cm^2 s^<-4>.
(3) Oxygen sorption amount-oxygen partial pressure relationship was steeply or non-continuously augmented at a specific oxygen pressure for the polymers involving micro-crystals of salcomine. This specific and on-off-type or sigmoidal-type oxygen sorption was reversibly and repeatedly observed. The specific oxygen sorption behabiour associated with a hysterisis isotherm was discussed with a cooperative interaction of crystal micro-structure of the oxygen-binding moiety and relaxation in the polymer matrix.
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