Highly flexible degradable fibers
AssigneeFraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
InventorsMiranda Rothenburger-Glaubitt, Bastian Christ, Walther Glaubitt, Jörn Probst
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Abstract
The present invention relates to a method for producing biodegradable fibers on the basis of a silane compound, said silane compound being crosslinked during production and, at least to some extent, an organic acid being incorporated into the forming crosslinked structure via covalent bonds and/or contributing to the crosslinking. The present invention also relates to the fibers that can be produced by the method according to the invention and to the use thereof.
Claims14
A process for producing biodegradable fibres comprising the following steps:
- a) providing an alcoholic solution of a silane compound selected from the group consisting of tetraalkoxysilanes, trialkoxysilanes, halosilanes, and mixtures thereof;
- b) providing an aqueous solution of an organic acid selected from the group consisting of sulfonic acids, sulfuric esters, phosphonic acids, phosphoric esters, and mixtures thereof;
- c) combining the solutions provided in steps a) and b) and mixing for 4 hours to 1 week at a temperature of 20 to 70° C.;
- d) removing at least part of the alcohol from the mixture from step c) and cooling the concentrated mixture to a temperature of 20 to −25° C.;
- e) storing the cooled mixture from step d) until a viscosity of 10 to 75 Pa·s is reached;
- and
- f) spinning the mixture from step e) into continuous fibres;
- wherein
- during steps c) to e), the silane compound undergoes crosslinking and at least part of the organic acid is incorporated into the resulting network via covalent bonds and/or contributes to the crosslinking.
A biodegradable fibre produced by a process comprising the following steps:
- a) providing an alcoholic solution of a silane compound selected from the group consisting of tetraalkoxysilanes, trialkoxysilanes, halosilanes, and mixtures thereof;
- b) providing an aqueous solution of an organic acid selected from the group consisting of sulfonic acids, sulfuric esters, phosphonic acids, phosphoric esters, and mixtures thereof;
- c) combining the solutions provided in steps a) and b) and mixing for 4 hours to 1 week at a temperature of 20 to 70° C.;
- d) removing at least part of the alcohol from the mixture from step c) and cooling the concentrated mixture to a temperature of 20 to −25° C.;
- e) storing the cooled mixture from step d) until a viscosity of 10 to 75 Pa·s is reached;
- and
- f) spinning the mixture from step e) into continuous fibres;
- wherein
- during steps c) to e), the silane compound undergoes crosslinking and at least part of the organic acid is incorporated into the resulting network via covalent bonds and/or contributes to the crosslinking.
Dependencies are inferred from the claim text.