Method for producing a storable molded body made of bacterial cellulose
First Claim
1. A method for producing a storable and swellable molded body made of bacterial cellulose, wherein the method comprises steps of:
- providing a molded body of the bacterial cellulose, the bacterial cellulose in the molded body consisting of fibers of bacterial cellulose without foreign polymers;
treating the molded body with a treatment solution comprising20% by weight to 50% by weight of glycerol and 50% by weight to 80% by weight of a C1-C3-alcohol/water mixture; and
drying the treated molded body.
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Abstract
A method for producing a storable molded body made of bacterial cellulose and a molded body produced according to the method. A preferred method includes providing a molded body made of bacterial cellulose. Optionally, mechanically pressing the entire molded body or parts of the molded body at temperatures in the range of 10° C. to 100° C. and pressures in the range of 0.01 to 1 MPa for a pressing time of 10-200 min. Treating the molded body with a solution of 20% by weight to 50% by weight of glycerol and 50% by weight to 80% by weight of a C1-C3-alcohol/water mixture. Drying the treated molded body.
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Citations
24 Claims
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1. A method for producing a storable and swellable molded body made of bacterial cellulose, wherein the method comprises steps of:
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providing a molded body of the bacterial cellulose, the bacterial cellulose in the molded body consisting of fibers of bacterial cellulose without foreign polymers; treating the molded body with a treatment solution comprising 20% by weight to 50% by weight of glycerol and 50% by weight to 80% by weight of a C1-C3-alcohol/water mixture; and drying the treated molded body. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A method for producing a storable and swellable molded body made of bacterial cellulose, wherein the method comprises steps of:
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providing a molded body of the bacterial cellulose, the bacterial cellulose in the molded body consisting of fibers of bacterial cellulose without foreign polymers; treating the molded body with a treatment solution comprising 35% by weight to 75% by weight of a C1-C3 alcohol 5% by weight to 25% by weight of water and 20 -50 % by weight of glycerol; and drying the treated molded body. - View Dependent Claims (23)
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24. A method for producing a storable and swellable molded body made of bacterial cellulose, wherein the method comprises steps of:
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providing a molded body made of the bacterial cellulose without foreign polymers; treating the molded body with a treatment solution comprising 20% by weight to 50% by weight of glycerol and 50% by weight to 80% by weight of a C1-C3-alcohol/water mixture; and drying the treated molded body, further comprising producing the molded body of bacterial cellulose and cleaning the body of bacterial cellulose, wherein the cleaning comprises; a) transferring the body of bacterial cellulose into an aqueous solution of 1-10% by weight of at least one surfactant and 0.4 -4% by weight of at least one base, b) microwave treating the body of bacterial cellulose at a temperature of at least 80°
C., but less than 100°
C., for 30-60 min,c) washing the body of bacterial cellulose in a solution of aqueous acid in combination with application of microwaves, and rinsing with water.
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Specification