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Multi-layered interlaced membrane and methods for fabrication thereof

A technology of interlaced layers and substrate layers, applied in the direction of textiles and papermaking, non-woven fabrics, layered products, etc., can solve problems such as weak adhesion and easy delamination

Active Publication Date: 2021-11-02
NANO & ADVANCED MATERIALS INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the main limitation of existing membranes made from electrospun fibers is the weak adhesion between different layers and their easy delamination when the number of membrane layers or membrane thickness is increased.

Method used

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  • Multi-layered interlaced membrane and methods for fabrication thereof
  • Multi-layered interlaced membrane and methods for fabrication thereof
  • Multi-layered interlaced membrane and methods for fabrication thereof

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0041] Synthesis of multilayer interlaced structures

[0042] 17% polystyrene (PS) and 0.1% tetramethylammonium bromide (TEAB) were dissolved in a mixture of dimethylformamide (DMF) and limonene (LMN) (DMF:LMN=1:1.6) to obtain first polymer solution. The first polymer solution was loaded into the needleless electrospinning in the upward rotation direction, wherein the electrospinning of the first polymer solution was performed to form the nanofiber layer 11 under the following conditions: electrode distance: 180 mm; voltage: 50 kV; Metal insert size: 0.6 mm; loading speed: 350 mm / s; air conditions in the spinning chamber: 30% RH and 22°C. Subsequently, 12% PS and 0.15% TEAB were dissolved in a mixture of DMF and LMN (DMF:LMN=1:1.3) to obtain a second polymer solution. The second polymer solution was loaded into the needleless electrospinning in the upward rotation direction, wherein the electrospinning of the second polymer solution was performed to form the interlaced lay...

example 2

[0063] According to some embodiments of the present invention, 8% polyacrylonitrile (PAN), 0.1% benzyltriethylammonium chloride (BTEAC) are dissolved in DMF to obtain a second polymer solution. The second polymer solution was electrospun in an upward spin direction to form interleaving layers. The diameter of the submicron fibers of the alternating layers is in the range of 180-190nm ( image 3 , arrow); the diameter of the nanofibers of the interlaced layers is in the range of 20-80nm ( image 3 , open arrows); the diameter of the nanobranches of the interlaced layers is in the range of 10-30nm ( image 3 , dotted arrow). In addition, the surface tension of the alternating layers was about 35.2 mN / m.

example 3

[0065] According to some embodiments of the present invention, 8% polyacrylonitrile (PAN), 0.1% benzyltriethylammonium chloride (BTEAC), and 1% L-ascorbic acid are dissolved in DMF to obtain a second polymer solution. The second polymer solution was electrospun in an upward spin direction to form interleaving layers. The diameter of the submicron fibers of the alternating layers is in the range of 140-150nm ( Figure 4 , arrow); the diameter of the nanofibers of the interlaced layers is in the range of 20-90nm ( Figure 4 , open arrows); the diameter of the nanobranches of the interlaced layers is in the range of 10-30nm ( Figure 4 , dotted arrow). In addition, the surface tension of the alternating layers was about 35.2 mN / m.

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Abstract

The invention provides a multi-layered interlaced membrane. The multi-layered interlaced membrane comprises at least one substrate layer (10) including a plurality of first polymer-based microfibers; at least one nanofibrous layer (11) including a plurality of second polymer-based nanofibers where each of the nanofibers has one or more nano-branches; at least one interlaced layer (12) including a plurality of third polymer-based submicron fibers where each of the submicron fibers has one or more nano-branches and a plurality of fourth polymer-based nanofibers where each of the nanofibers has one or more nano-branches, wherein the third polymer-based submicron fibers are interlaced with the fourth polymer-based nanofibers; at least one submicron fibrous layer (13) including a plurality of fifth polymer-based submicron fibers where each of the submicron fibers has one or more nano-branches. The nanofibrous layer (11) is positioned onto the substrate layer (10); the interlaced layer (12) is positioned onto the nanofibrous layer (11); and the submicron fibrous layer (13) is positioned onto the interlaced layer (12).

Description

[0001] Cross References to Related Applications [0002] This application claims priority to U.S. Provisional Patent Application Serial No. 62 / 878,738, filed July 25, 2019, the disclosure of which is incorporated herein by reference in its entirety. technical field [0003] The present invention provides a multilayer interlaced film and its manufacturing method. Specifically, a multilayer interleaved membrane comprises a substrate layer, a nanofiber layer, an interleaved layer, and a microfiber layer. Background technique [0004] Electrospinning techniques for fabricating polymer fibers with diameters ranging from a few nanometers to a few micrometers have developed rapidly in the past decade due to the unique physical, chemical and biological properties of polymer fibers. Furthermore, monolayer or multilayer membranes composed of electrospun fibers with the advantages of large surface area and small controllable pore size have been widely used in drug delivery, medical de...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B5/08
CPCB32B5/08B32B5/26B32B2262/0246B32B2262/0261B32B2307/732B32B2262/0292B32B2262/0276B32B2262/0284B32B2262/04B32B2262/0253B32B5/022B32B2262/0238B32B2262/023B32B2262/02B32B2262/062D04H1/724D04H1/728
Inventor 唐滈宏梁宇恒余智恒陈咏敏
Owner NANO & ADVANCED MATERIALS INST
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