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A kind of sponge fiber, preparation method and application

A fiber and sponge technology, applied in the field of sponge fiber and preparation, can solve the problems of limited application scope, low mechanical properties, and single structure.

Active Publication Date: 2022-05-24
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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  • A kind of sponge fiber, preparation method and application
  • A kind of sponge fiber, preparation method and application
  • A kind of sponge fiber, preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

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

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

[0078] S2. take by weighing 80g lithium hydroxide and 150g urea, add 770mL ultrapure water, after stirring and dissolving, get mixed aqueous solution II;

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

[0080] S4. Mixing and stirring (rotating speed 1500rad / min, time 5min) of mixed aqueous solution II after step S3 cooling and cotton linters, obtain transparent cellulose solution;

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

[...

Embodiment 2

[0089] The present embodiment prepares a kind of sponge fiber, and the difference between the specific 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 advancing speed of the cooled supernatant B is 220 μL / min; the advancing speed of the mixed aqueous solution II is 500 μL / min; the advancing speed of the mixed aqueous solution I is 500 μL / min.

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

[0093] The SEM image of the sponge fiber obtained in this example is as follows Figure 4 shown.

Embodiment 3

[0095] The present embodiment has prepared a kind of sponge fiber, and the difference between the specific process and Example 2 is:

[0096] (1) in step S3, the cotton linters quality 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, stirring time is 2h;

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

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

[0101] The SEM image of the sponge fiber obtained in this example is as follows Figure 5 shown.

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Abstract

The invention discloses a sponge fiber, a preparation method and an application, and belongs to the field of fiber technology. A sponge fiber is filamentous and its cross-section is a net-like cross-section. The net-like cross-section includes a central part and an edge part located on the periphery of the central part. The average pore diameter of the central part is smaller than that of the edge part. The sponge fiber provided by the invention has a special structure, so it performs well in the fields of sound-insulating materials and heat-retaining materials, and has broad application prospects in the fields of materials that directly contact with the human body and in the technical field of biological scaffold materials.

Description

technical field [0001] The invention belongs to the technical field of fibers, 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 widely used in the fields of bioscaffold material technology, drug diagnosis technology, and oral pharmacy that simulate the in vitro microenvironment of cells. There are a wide range of applications in the technical field and in the field of materials that are in direct contact with the body (eg wound dressings). [0003] Currently, there are two main strategies for constructing regenerated fibers, top-down and bottom-up. Among them, the top-down strategy is to spin by using dry spinning, wet spinning, wet extrusion, microfluidic field spinning, dry jet wet spinning and other processing methods. The obtained cellulose fibers generally have the c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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