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US 6,409,961 B1Granted
Titania fiber, method for producing the fiber and method for using the fiber
AssigneeSumitomo Chemical Company, Limited
InventorsHironobu Koike, Yasuyuki Oki, Yoshiaki Takeuchi
Life of this patent
Estimating the term…
Abstract
A continuous fiber of titania are made having an average diameter per a monofilament of from 5 to 50 μm, which has a BET specific surface area of 10 m2/g or more, a pore volume of 0.05 cc/g or more, a volume of pores having a pore diameter of not less than 10 angstroms being 0.02 cc/g or more and an average tensile strength per a monofilament of 0.1 GPa or more, or which has an average tensile strength per a monofilament of 0.5 GPa or more.
Claims25
A method for producing a continuous fiber of titania, which comprises:
- (i) adding water to an alcohol solution of a titanium alkoxide to carry out a hydrolysis reaction and a polymerization reaction of the titanium alkoxide;
- (ii) forming and depositing a polymer which is insoluble in the alcohol;
- (iii) dissolving the polymer in the presence of an organic solvent in which the polymer dissolves to form a spinning solution;
- (iv) spinning the spinning solution to obtain a precursor fiber;
- and
- (v) calcining the precursor fiber to obtain said continuous fiber.
3 more elements
A method for producing a continuous fiber of titania, which comprises:
- (i) adding water to an alcohol solution of a titanium alkoxide to carry out a hydrolysis reaction and a polymerization reaction of the titanium alkoxide;
- (ii) forming and depositing a polymer which is insoluble in the alcohol;
- (iii) dissolving the polymer in the presence of an organic solvent in which the polymer dissolves to form a spinning solution;
- (iv) spinning the spinning solution to obtain a precursor fiber;
- (v) treating the precursor fiber with water vapor before and/or during calcination;
- and
- (vi) calcining the precursor fiber to obtain said continuous fiber.
4 more elements
Dependencies are inferred from the claim text.