Production and use of laminated nanofibrous structures

A fiber structure, fiber technology, applied in the fiber structure, controlling the amount of liquid near the surface, in the field of electrospinning fiber structure, can solve problems such as being swallowed, bleach leakage, etc.

Inactive Publication Date: 2011-09-28
UNIV GENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

On the other hand, such systems also have the problem of bleach leaking into the gums and optionally being swallowed

Method used

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  • Production and use of laminated nanofibrous structures
  • Production and use of laminated nanofibrous structures
  • Production and use of laminated nanofibrous structures

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0228] Polyesteramide (PEA) obtained by synthesis from fatty acids (molecular weight approx. 20.000 g.mol -1 ) was dissolved in chloroform in order to obtain a 25% solution of PEA. Using multiple multi-channel peristaltic pumps, each outlet 15ml.h -1 The flow rate of the solution is pumped to a set of 24 outlets. In the spinneret, apply about 1000V.cm on the outlet and receiving faces -1 electric field to enable electrospinning of polymer solutions. The outlets are designed in a triangular layout, with 4 rows and 6 outlets in each row. The temperature was controlled at 298K. The outlet surface is positioned at an angle of 10° relative to the receiving surface, and the movement of the outlet surface is perpendicular to the movement of the receiving surface. The velocity of the receiving surface is 40cm.h -1 , while the velocity at the exit face is 1cm.s -1 . After spinning for 2 hours, a 300 μm thick nanofibrous structure with a length of about 1.5 m and a width of 80 c...

Embodiment 2

[0230] Polyamide 6 / 6 (PA66) (molecular weight about 20.000g.mol -1 ) was dissolved in formic acid in order to obtain a solution of 14% PA66. Use multiple multi-channel peristaltic pumps, each outlet 2ml.h -1 The flow rate pumps the solution to two sets of 24 outlets each. In the spinneret, apply about 3.500V.cm on the outlet and receiving faces -1 electric field to enable electrospinning of polymer solutions. The outlets are designed in a triangular layout, with 4 rows and 6 outlets in each row. Two spinnerets were used, each operating at a different distance between the exit and the receiving face. The temperature was controlled at 298K. The first outlet face is at a distance of 4 cm from the receiving face and the second outlet face is at a distance of 6 cm from the receiving face. The velocity of the receiving surface is 60cm.h -1 , while the velocity at the exit face is 1cm.s -1 . After spinning for 2 hours, a 100 μm thick nanofibrous structure with a length of ab...

Embodiment 3

[0233] Cellulose acetate (CA) (molecular weight about 30,000g.mol -1 ) was dissolved in acetone / dimethylacetamide (2:1) to obtain a 14% CA solution. Use multiple multi-channel peristaltic pumps, each outlet 10ml.h -1 The flow rate pumps the solution to two sets of 24 outlets each. In the spinneret, apply about 850V.cm on the outlet and receiving faces -1 electric field to enable electrospinning of polymer solutions. The outlets are designed in a triangular layout, with 4 rows and 6 outlets in each row. Two spinnerets were used, each operating at a different distance between the exit and the receiving face. The temperature was controlled at 298K. The first outlet face is at a distance of 20 cm from the receiving face and the second outlet face is at a distance of 15 cm from the receiving face. The velocity of the receiving surface is 60cm.h -1 , while the velocity at the exit face is 1cm.s -1 . After spinning for 2 hours, a nanofibrous structure of about 200 μm thick w...

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Abstract

An electrospinning device is described for producing fibrous porous structures. The device is adapted for providing a predetermined distance profile for the distance between outlets of the electrospinning device and the receiving surface. The latter may be obtained by geometrically adapting the electrospinning device or by moving the outlets with respect to the receiving surface during growth of the fibrous structure. A fibrous structure obtained by the described electrospinning device is also described which comprises fibres, wherein the diameter of the fibres has a predetermined profile along a dimension of the electrospun fibrous structure. Furthermore application of the laminated structure for wound dressing and teeth bleaching is discussed.

Description

[0001] technical field of invention [0002] The present invention relates to fibrous structures, methods and apparatus for making such fibrous structures. In particular, the present invention relates to methods and systems for electrospinning fibrous structures, resulting products such as nanofibrous structures, and their uses. The invention also relates to the field of wound dressings. More specifically, the present invention relates to methods and systems for controlling the amount of liquid near a surface, for example in the field of wound dressings. The invention also relates to the field of dental applications. More specifically, the present application relates to methods, products and systems in the field of tooth whitening. Background of the invention [0003] Nanofibrous structures are used in a variety of applications in clothing, filtration, medicine and defense. Nanofibrous structures have received great attention in light of their high porosity for absorbing, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01D5/00D04H1/728D04H3/03
CPCD01D7/00D04H1/728B32B5/26D04H3/03D01D5/0061D04H13/00B32B5/12B32B2250/02B32B2307/54B32B2437/00
Inventor P・韦斯特布鲁克T・范坎普S・德弗利茨K・德克莱克
Owner UNIV GENT
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