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Electrospun nylon 66/pva/boric acid nanofiber and preparation method thereof

A technology of composite nanofiber and nylon, which is applied in the direction of spinning solution preparation, fiber treatment, fiber chemical characteristics, etc., can solve the problems of strong taste and toxicity of formic acid, and achieve the effect of good filterability, high strength and small fiber diameter

Active Publication Date: 2018-11-09
JIANGXI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Formic acid has a strong taste and is toxic, so it is not suitable for large-scale electrospinning of nylon nanofibers from nylon formic acid solution

Method used

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  • Electrospun nylon 66/pva/boric acid nanofiber and preparation method thereof
  • Electrospun nylon 66/pva/boric acid nanofiber and preparation method thereof

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preparation example Construction

[0036] Another aspect of the present invention provides a method for preparing electrospun nylon 66 / PVA / boric acid composite nanofibers, comprising the following steps:

[0037] (1) Nylon 66 salt is dissolved in water to form a precursor solution;

[0038] (2) In the precursor solution described in step (1), add PVA and boric acid to form a spinning mixed solution, and obtain nylon 66 / PVA / boric acid precursors by electrospinning;

[0039] (3) The nylon 66 / PVA / boric acid precursor described in step (2) is dried, and after heat treatment, nylon 66 / PVA / boric acid composite nanofibers are obtained.

[0040] Electrospinning:

[0041] The electrospinning described in step (2) is a special fiber manufacturing process, and the polymer solution or melt is jet-spun in a strong electric field. Under the action of the electric field, the droplet at the needle will change from a spherical shape to a conical shape (that is, "Taylor cone"), and extend from the tip of the cone to obtain a...

Embodiment 1

[0055] At room temperature, weigh 4g of nylon 66 salt, dissolve nylon 66 salt in water, and stir magnetically for 2 hours to form a precursor solution, which is labeled as A solution;

[0056] Add 1g of PVA and 0.25g of boric acid in solution A to form a spinning mixed solution with a solution concentration of 10%, which is marked as solution B, and the absolute viscosity of the spinning mixed solution is 2.5Pa·S;

[0057] The preparation B solution is placed in the spinning device, the curing distance is adjusted to 15cm and the voltage is 20kV, the wire mesh is connected to the negative electrode, and the nylon 66 / PVA / boric acid precursor is collected on the wire mesh as the negative electrode.

[0058] The obtained nylon 66 / PVA / boric acid precursors were dried and heated at 220° C. for 2 hours under nitrogen gas to prepare nylon 66 / PVA / boric acid composite nanofibers.

[0059] The mass ratio of each component in the prepared nylon 66 / PVA / boric acid composite nanofiber is: ...

Embodiment 2

[0063] At room temperature, weigh 4g of nylon 66 salt, dissolve nylon 66 salt in water, and stir magnetically for 2 hours to form a precursor solution, which is labeled as A solution;

[0064] Add 6g of PVA and 1.5g of boric acid in solution A to form a spinning mixed solution with a solution concentration of 15%, marked as solution B, and the absolute viscosity of the spinning mixed solution is 3.0Pa·S;

[0065] The preparation B solution is placed in the spinning device, the solidification distance is adjusted to 16cm and the voltage is 22kV, the wire mesh is connected to the negative electrode, and the nylon 66 / PVA / boric acid precursor is collected on the wire mesh as the negative electrode.

[0066] The obtained nylon 66 / PVA / boric acid precursors were dried and heated at 230° C. for 2 hours under nitrogen to prepare nylon 66 / PVA / boric acid composite nanofibers.

[0067] The mass ratio of each component in the prepared nylon 66 / PVA / boric acid composite nanofiber is:

[006...

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Abstract

The invention discloses an electrospun nylon 66 / PVA / boric acid nanofiber, which comprises nylon 66 salt, PVA and boric acid, wherein the mass ratio of nylon 66 salt to PVA is 4:(1-6). This method solves the problem of preparing nylon 66 / PVA / boric acid composite nanofibers by electrospinning in a non-toxic, cheap, and environmentally friendly water solvent, and overcomes the large-scale electrospinning of nylon from formic acid solution due to the strong taste of formic acid Disadvantages of nanofibers. The nylon 66 / PVA / boric acid composite nanofiber prepared by the method provided by the invention has better tensile strength, toughness and modulus, and has moderate elongation. On the other hand, due to the small fiber diameter of nylon nanofibers, toughness and high strength, the nylon 66 / PVA / boric acid nanofiber nonwoven fabric prepared by the present invention also has better tensile strength and elongation at break High rate, good filterability.

Description

technical field [0001] The invention relates to the field of composite nanofibers, in particular to an electrospun nylon 66 / PVA / boric acid nanofiber and a preparation method thereof. Background technique [0002] Polyamide (Polyamiade, referred to as PA) commonly known as nylon (Nylon), as a typical representative of semi-crystalline thermoplastic polymers, is one of the five major engineering plastics (polyamide, polyoxymethylene, polycarbonate, modified polybenzoic acid, thermoplastic polyamide It is the polymer material with the largest output, the most varieties, and the widest application among esters. Among them, nylon 66 has become one of the most widely used varieties due to its excellent performance. Nylon 66 has excellent mechanical properties, high mechanical strength, good toughness, self-lubricating property and good friction resistance. Nylon 66 is mainly used in automobiles, machinery industry, electronic appliances, precision instruments and other fields. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01D5/00D01D1/02D01D10/02D01F8/12D01F8/10D01F1/10D04H1/4382
CPCD01D1/02D01D5/0015D01D10/02D01F1/10D01F8/10D01F8/12D04H1/4382
Inventor 侯豪情徐海波杨婷李永红
Owner JIANGXI NORMAL UNIV
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