Method of making self-sealing materials
First Claim
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1. A self-sealing material comprising a hydrogel adhered to pore walls of a porous substrate.
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Abstract
This invention relates to gas- or liquid-permeable materials that seal when exposed to water and methods of making such materials. In general, materials of this invention comprise a hydrogel adhered to pore walls of a porous substrate.
The invention further relates to devices comprising self-sealing materials including, but not limited to, pipette tips, containers, intravenous liquid delivery systems, and syringe caps.
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Citations
42 Claims
- 1. A self-sealing material comprising a hydrogel adhered to pore walls of a porous substrate.
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12. A process for making a self-sealing material which comprises forming a mixture comprising a hydrogel material and a substrate material and heating the mixture to the sintering temperature of the substrate material to form a porous substrate, wherein the sintering temperature is greater than the melting point of the hydrogel material.
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18. A process for making a self-sealing material which comprises immersing at least part of a porous substrate in a solution comprising a non-aqueous solvent and a hydrogel material.
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24. A process for making a self-sealing material which comprises immersing at least a part of a porous substrate in a solution comprising at least one reactant under conditions suitable for the formation of a hydrogel material within pores of the porous substrate.
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28. A process for making a self-sealing material which comprises coating fibers of a support material with a hydrogel and assembling the coated fibers in such a way as to form a porous substrate.
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29. A pipette tip which comprises:
- a hollow tube open at opposite first and second ends;
a center member disposed between said opposite first and second ends; and
a means for attaching the first end of the hollow tube to a suction device, wherein said center member comprises at least one pore or channel having an inner wall coated partially or completely with a hydrogel.
- a hollow tube open at opposite first and second ends;
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30. A pipette tip which comprises:
- a hollow tube open at opposite first and second ends;
a self-sealing plug member disposed between said opposite first and second ends; and
a means for attaching the first end of the hollow tube to a suction device, wherein said self-sealing plug member comprises a hydrogel adhered to pore walls of a porous substrate. - View Dependent Claims (32)
- a hollow tube open at opposite first and second ends;
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34. A container for holding a liquid which comprises:
- an inner surface;
an outer surface; and
a self-sealing vent comprised of a hydrogel adhered to pore walls of a porous substrate, wherein gas or non-aqueous liquid can pass from the inner surface to the outer surface through the vent.
- an inner surface;
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37. An intravenous liquid delivery system which comprises:
- a container;
a tube;
a needle; and
a self-sealing vent operatively attached to one another such that liquid can pass from the container and thru the tube and needle, wherein the self-sealing vent is comprised of a hydrogel adhered to pore walls of a porous substrate.
- a container;
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40. A cap for facilitating purging of gas from a syringe containing liquid and gas which comprises:
- a tubular housing open at opposite first and second ends;
a self-sealing plug member disposed between said opposite first and second ends and comprised of a hydrogel adhered to pore walls of a porous substrate; and
a means for attaching the first end of the hollow tube to a syringe. - View Dependent Claims (41, 42)
- a tubular housing open at opposite first and second ends;
Specification