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US 10,293,291 B2Granted
Interlaced filtration barrier
AssigneeNano and Advanced Materials Institute Limited
InventorsHo Wang Tong, Sau Kuen Connie Kwok
Life of this patent
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Abstract
A filtration barrier comprises at least one barrier layer which includes polymeric nanofibers interlaced with microfibers, and at least one substrate layer which includes polymeric microfibers. The filtration barrier can be made by electrospinning process.
Claims20
A method of fabricating a filtration barrier, comprising:
- obtaining a polymer solution that includes cellulose acetate (CA) and polyethylene oxide (PEO);
- and
- electrospinning the polymer solution onto a substrate layer to form an interlaced structure of nanofibers and microfibers on the substrate layer so that the nanofibers and the microfibers form a barrier layer;
- wherein the nanofibers account for 60%-70% by weight in the barrier layer and the microfibers of the interlaced structure account for 30%-40% by weight in the barrier layer;
- wherein the barrier layer and the substrate layer are attached to form the filtration barrier,
- wherein the nanofibers and the microfibers are made from the same polymer solution, the nanofibers and the microfibers are interlaced in the same layer, and the nanofibers and the microfibers are discharged together from the same polymer solution during electrospinning to form the interlaced structure.
3 more elements
A method of fabricating a filtration barrier, comprising:
- obtaining a polymer solution that includes a polymer;
- electrospinning the polymer solution to form a barrier layer;
- and
- attaching the barrier layer to a substrate layer to obtain the filtration barrier,
- wherein
- the barrier layer includes a plurality of first polymer-based nanofibers and a plurality of second polymer-based microfibers that are interlaced with the first polymer-based nanofibers in a same layer;
- and
- the substrate layer includes a plurality of third polymer-based microfibers and is attached onto the barrier layer,
- wherein the first polymer-based nanofibers and the second polymer-based microfibers that are interlaced with the first polymer-based nanofibers in the barrier layer are made from the same polymer solution,
- wherein the first polymer-based nanofibers are electrospun nanofibers and the second polymer-based microfibers are electrospun microfibers,
- wherein the first polymer-based nanofibers account for 60%-70% by weight of the barrier layer, and the interlaced structure of the barrier layer has a pore size of 100-10000 nanometers,
- wherein the first polymer-based nanofibers and the second polymer-based microfibers are discharged together from the same polymer solution during electrospinning to form the interlaced structure.
9 more elements
Dependencies are inferred from the claim text.