Test element with nanofibers
View Patent ↗The invention concerns test elements, in particular diagnostic test elements, for determining the presence or concentration of biological, medical or biologically or medically effective substances including nucleic acids, proteins, viruses, microorganisms and cells, characterized in that these test elements contain nanofibers.
1. A test element for detecting an analyte in a bodily fluid sample, comprising an electrochemical or photometric detection reagent for detecting the analyte in the bodily fluid sample, the detection reagent and nanofibers applied to a porous or non-porous support material, at least some of the nanofibers containing more than one polymer bead thereon and having a length of at least 2 mm.
2. The test element of claim 1 , further comprising continuous nanofibers.
3. The test element of claim 1 , wherein the nanofibers are obtained by electrospinning.
4. The test element of claim 1 , wherein the nanofibers have a diameter of 10 to 2000 nm.
5. The test element of claim 1 , wherein the nanofibers have a diameter of 10 to 1000 nm.
6. The test element of claim 1 , wherein the nanofibers have a diameter of 10 to 500 nm.
7. The test element of claim 1 , wherein the nanofibers comprise hydrophilic nanofibers, hydrophobic nanofibers or mixtures thereof.
8. The test element of claim 7 , wherein the hydrophobic nanofibers form a surface of the test element having superhydrophobic properties.
9. The test element of claim 1 , wherein the nanofibers are composed of polymers selected from polyolefins, polyaromatic compounds, fluorinated or partially fluorinated polymers, polyesters, polyamides, polyurethanes, polyvinyl alcohols, polyvinyl amines, polyethyleneimines, polyalkylene oxides and combinations and copolymers thereof.
10. The test element of claim 1 , wherein the nanofibers comprise fleeces, fabrics, membranes, layers or combinations thereof.
11. The test element of claim 1 , wherein the test element comprises a test strip.
12. The test element of claim 1 , wherein the test element comprises a test array.
13. The test element of claim 1 , wherein the nanofibers are applied to a porous support material selected from papers, fleeces and membranes.
14. The test element of claim 13 , wherein the nanofibers are applied to at least one surface of the porous support material.
15. The test element of claim 13 , wherein the nanofibers comprise a filter element for separating particulate components from a sample.
16. The test element of claim 15 , wherein the filter element is configured for separating blood cells from a blood sample.
17. Test element according to claim 1 , wherein the nanofibers are applied to the surface of a non-porous support material.
18. The test element of claim 1 , further comprising a surface coated with hydrophilic nanofibers to increase the wettability of the surface.
19. The test element of claim 1 , wherein the porous or non-porous support material comprises a surface coated with hydrophobic nanofibers to reduce the wettability of the surface.
20. The test element of claim 19 , wherein the coated surface has superhydrophobic properties.
21. The test element of claim 1 , further comprising at least one first area covered with hydrophilic nanofibers and at least one second area covered with hydrophobic nanofibers.
22. The test element of claim 1 , further comprising a surface coated with a mixture of hydrophilic and hydrophobic nanofibers, the surface being configured for uniform distribution of liquids applied thereto.
23. The test element of claim 1 , wherein the nanofibers comprise a filter configured to separate red blood cells from blood in a blood sample.
24. The test element of claim 23 , wherein the filter comprises a fleece.
25. The test element of claim 24 , wherein the fleece has a thickness of 0.02 μm to 50 μm.
26. The test element of claim 24 , wherein the fleece has a thickness of 0.08 μm to 2 μm.
27. The test element of claim 23 , wherein the nanofibers are hydrophilic.
28. The test element of claim 1 , wherein the support material is hydrophobic and the nanofibers are hydrophilic.
29. The test element of claim 1 , wherein the nanofibers comprise a thin layer having a mass per unit area of 10 to 50 mg/m 2 .
30. The test element of claim 1 , wherein the nanofibers comprise an asymmetric membrane.
31. The test element of claim 1 wherein the nanofibers comprise a thin layer having a thickness of 20 to 2000 nm.
32. The test element of claim 1 , wherein the nanofibers comprise a hydrophobic barrier.