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Sponge fiber, preparation method and application

A fiber and sponge technology, applied in the field of fibers, can solve the problems of insufficiently dense structure, low degree of orientation, and single structure.

Active Publication Date: 2021-07-16
WUYI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The cellulose fiber constructed by the bottom-up strategy is the process of dissolving the natural fiber and then making the gel grow into the fiber. Although the dissolution process is simple, quick, green and low in cost, strong acid, The neutralization reaction of strong alkali will affect the structure of the fiber, usually there are problems such as low degree of orientation, insufficient structure, low mechanical properties, close relationship between wire size and chip size, and single structure.
[0004] Compared with other methods, wet spinning has the advantages of convenient operation and high product quality, and is a commonly used method for the preparation of regenerated fibers. However, for regenerated fibers prepared by conventional wet spinning, the solution of regenerated fibers needs to be in direct contact with the coagulation solution. , and a strong coagulation reaction occurs, therefore, the prepared regenerated fiber is a skin-core structure fiber with a dense outer surface and a relatively loose interior, and this kind of regenerated fiber with a dense outer surface limits its application range

Method used

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  • Sponge fiber, preparation method and application
  • Sponge fiber, preparation method and application
  • Sponge fiber, preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0076] The present embodiment has prepared a kind of sponge fiber, and concrete process is:

[0077] S1. configure the mixed aqueous solution of phytic acid and sodium sulfate to obtain mixed aqueous solution I, wherein the concentration of phytic acid is 7.5wt%, and the concentration of sodium sulfate is 5wt%;

[0078] S2. Weigh 80g of lithium hydroxide and 150g of urea, add 770mL of ultrapure water, stir and dissolve to obtain the mixed aqueous solution II;

[0079] S3. Place 500g of the mixed aqueous solution II (solvent) and 29.1g of cotton linters (natural cellulose) at -25°C for cooling for 2h;

[0080] S4. Mix and stir the mixed aqueous solution II and cotton linters after cooling in step S3 (rotating speed 1500rad / min, time 5min) to obtain a transparent cellulose solution;

[0081] S5. centrifuging the cellulose solution obtained in step S4 to obtain a supernatant A, wherein the centrifugation speed is 8000 rad / min, the time is 30 min, and the temperature is 0° C.;

...

Embodiment 2

[0089] This embodiment has prepared a kind of sponge fiber, and the difference of concrete process and embodiment 1 is:

[0090] (1) In step S6, the addition ratio of crosslinking agent epichlorohydrin is 1.5mL crosslinking agent / 200g supernatant A;

[0091] (2) In step S8, the propulsion speed of the cooled supernatant B is 220 μL / min; the propulsion speed of the mixed aqueous solution II is 500 μL / min; the propulsion speed of the mixed aqueous solution I is 500 μL / min.

[0092] (3) In step S10, the drying method is freeze drying, and the drying time is 3 hours.

[0093] The SEM figure of the sponge fiber obtained in the present embodiment is as follows Figure 4 shown.

Embodiment 3

[0095] This embodiment has prepared a kind of sponge fiber, and the difference of concrete process and embodiment 2 is:

[0096] (1) In step S3, the quality of cotton linters is 31.9g;

[0097] (2) In step S6, the addition ratio of crosslinking agent epichlorohydrin is 3mL crosslinking agent / 200g supernatant A;

[0098] (3) In step S6, the stirring time is 2h;

[0099] (4) In step S8, the propulsion speed of the cooled supernatant B is 150 μL / min; the propulsion speed of the mixed aqueous solution II is 300 μL / min; the propulsion speed of the mixed aqueous solution I is 400 μL / min;

[0100] (5) In step S10, freeze-dry for 6 hours.

[0101] The SEM figure of the sponge fiber obtained in the present embodiment is as follows Figure 5 shown.

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Abstract

The invention discloses a sponge fiber, a preparation method and application, and belongs to the technical field of fibers. The sponge fiber is filamentous, the cross section of the sponge fiber is a net-shaped cross section, the net-shaped cross section comprises a central part and an edge part located on the periphery of the central part, and the average pore diameter of the central part is smaller than that of the edge part. The sponge fiber has a special structure, so that the sponge fiber has excellent performance in the fields of sound insulation materials and thermal insulation materials, and has wide application prospects in the fields of materials in direct contact with a human body and the technical field of biological scaffold materials.

Description

technical field [0001] The invention belongs to the field of fiber technology, and in particular relates to a sponge fiber, a preparation method and an application. Background technique [0002] Due to their good biocompatibility, chitin, chitosan, plant cellulose, bacterial fibers, and their derivatives and regenerated fibers are used in the technical field of bioscaffold materials simulating the in vitro microenvironment of cells, in the technical field of drug diagnosis, and in oral pharmaceuticals. Both the technical field and the field of materials that come into direct contact with the body (such as wound dressings) have a wide range of applications. [0003] At present, there are mainly two strategies for constructing recycled fibers: top-down and bottom-up. Among them, the top-down strategy is to spin by using dry spinning, wet spinning, wet extrusion, micro-flow field spinning, dry-jet wet spinning and other processing methods. This method uses cellulose nanomateri...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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IPC IPC(8): D01F2/00D01F9/00D01F11/00D01F11/02
CPCD01F2/00D01F9/00D01F11/02D01F11/00
Inventor 叶冬冬李绮华
Owner WUYI UNIV
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