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Dynamic solvent-responsive nanofiber-based flexible transparent composite film and its preparation method

A nanofiber membrane, nanofiber technology, applied in fiber processing, fiber type, textile and papermaking, etc., to achieve the effect of simple process, suitable strength and wide application

Active Publication Date: 2021-10-01
WUHAN TEXTILE UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no report on the preparation of composite membranes by combining NVP with nanofibers.

Method used

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  • Dynamic solvent-responsive nanofiber-based flexible transparent composite film and its preparation method
  • Dynamic solvent-responsive nanofiber-based flexible transparent composite film and its preparation method
  • Dynamic solvent-responsive nanofiber-based flexible transparent composite film and its preparation method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051]a) Add the NVP monomer solution, the initiator 2,2-dimethoxy-2-phenylacetophenone, and the crosslinking agent N,N-methylenebisacrylamide in a ratio of 500:1:1 In a 25mL beaker, stir well with a glass rod to obtain a uniformly mixed NVP polymerization solution, then cut the nanofiber film with a thickness of 60 μm into a size of 6cm×6cm and put it in the NVP polymerization solution for full infiltration.

[0052] b) Evenly mix polydimethylsiloxane (PDMS) and curing agent in a ratio of 10:1, then pour it into a petri dish with a diameter of 10 cm, and transfer it to an oven at a certain temperature for curing after vacuum degassing After 2 hours, a transparent and elastic PDMS substrate was formed, which was lifted for later use.

[0053] c) Take out the fully infiltrated nanofiber membrane from the NVP polymerization solution and place it on the PDMS elastic substrate, put the two together in a vacuum oven to eliminate the air bubbles between the interfaces, and make the ...

Embodiment 2

[0056] a) Add the NVP monomer solution, the initiator 2,2-dimethoxy-2-phenylacetophenone, and the crosslinking agent N,N-methylenebisacrylamide in a ratio of 250:1:1 to In a 25mL beaker, stir well with a glass rod to obtain a uniformly mixed NVP polymerization solution, then cut the nanofiber film with a thickness of 60 μm into a size of 6cm×6cm and put it in the NVP polymerization solution for full infiltration.

[0057] b) Evenly mix polydimethylsiloxane (PDMS) and curing agent in a ratio of 10:1, then pour it into a petri dish with a diameter of 10 cm, and transfer it to an oven at a certain temperature for curing after vacuum degassing After 2 hours, a transparent and elastic PDMS substrate was formed, which was lifted for later use.

[0058] c) Take out the fully infiltrated nanofiber membrane from the NVP polymerization solution and place it on the PDMS elastic substrate, put the two together in a vacuum oven to eliminate the air bubbles between the interfaces, and make ...

Embodiment 3

[0061] a) Add the NVP monomer solution, the initiator 2,2-dimethoxy-2-phenylacetophenone, and the crosslinking agent N,N-methylenebisacrylamide in a ratio of 100:1:1 to In a 25mL beaker, stir well with a glass rod to obtain a uniformly mixed NVP polymerization solution, then cut the nanofiber film with a thickness of 60 μm into a size of 6cm×6cm and put it in the NVP polymerization solution for full infiltration.

[0062] b) Evenly mix polydimethylsiloxane (PDMS) and curing agent in a ratio of 10:1, then pour it into a petri dish with a diameter of 10 cm, and transfer it to an oven at a certain temperature for curing after vacuum degassing After 2 hours, a transparent and elastic PDMS substrate was formed, which was lifted for later use.

[0063] c) Take out the fully infiltrated nanofiber membrane from the NVP polymerization solution and place it on the PDMS elastic substrate, put the two together in a vacuum oven to eliminate the air bubbles between the interfaces, and make ...

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Abstract

The invention discloses a dynamic solvent-responsive nanofiber-based flexible transparent composite membrane and a preparation method thereof, belonging to the technical field of composite membranes. The composite film is a three-dimensional network structure formed by the cross-linking reaction of nanofibers and monomers with a refractive index between 1.48 and 1.6 in the nanofiber gap. The transparency of the composite film is regulated by controlling the ratio of nanofibers to monomers. And for the transparent composite film, it can undergo a reversible change from transparent to opaque under the stimulation of a solvent or water vapor with a refractive index distribution between 1.3 and 1.4. The composite film can be widely used in the fields of architecture, interior decoration design, culture and education, meeting rooms and the like.

Description

technical field [0001] The invention relates to a composite film, which belongs to the technical field of nanofibers, in particular to a dynamic solvent-responsive nanofiber-based flexible transparent composite film and a preparation method thereof. Background technique [0002] At present, most smart materials tend to be electrochromic materials, and the change of transparency through the stimulation of voltage cannot meet people's needs to a certain extent, such as meeting rooms and bathrooms in some private places that are temporarily needed. Therefore, the development of Smart materials that are environmentally friendly, popular, convenient and accessible, and can meet people's needs anytime and anywhere have become very important. [0003] Vinylpyrrolidone (NVP), whose refractive index is 1.5120, has a transparent appearance, is easily soluble in water, ethanol, ether and other organic solvents, and is mainly used for the synthesis of PVP and PVPP. PVP has good hygrosc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06M14/28D06M14/34D06M101/24D06M101/20D06M101/34
CPCD06M14/28D06M14/34D06M2101/20D06M2101/24D06M2101/34
Inventor 王栋王文朴龙海李沐芳薛丹赵旭向晨雪
Owner WUHAN TEXTILE UNIV
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