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Preparation method of nylon 6/chitosan/noble metal nanofibers

A technology of nanofibers and nanofiber membranes, applied in fiber treatment, fiber chemical characteristics, rayon manufacturing, etc., to achieve low cost and improve dye degradation efficiency

Active Publication Date: 2021-06-15
NINGBO UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no report on the preparation of nylon 6 / chitosan / noble metal nanofibers by electrospinning technology

Method used

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  • Preparation method of nylon 6/chitosan/noble metal nanofibers
  • Preparation method of nylon 6/chitosan/noble metal nanofibers
  • Preparation method of nylon 6/chitosan/noble metal nanofibers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] 1.935 g of nylon 6 with a molecular weight of 10000 g / mol was dissolved in 10 ml of formic acid to obtain a mother liquor. Add molecular weight in mother liquor and be 10000g / mol chitosan, deacetylation degree 95%, the weight ratio 10% of chitosan and nylon, stir 24h, obtain nylon 6 / chitosan mixed solution; (3) to nylon 6 / Add 0.05g silver nitrate to the chitosan mixed solution, the total mass ratio of silver nitrate to chitosan and nylon 6 is 2%, after stirring for 24 hours, stand still for 8 hours to obtain the nylon 6 / chitosan / silver nitrate mixed solution, the solution viscosity It is 960cP; (4) above-mentioned nylon 6 / chitosan / silver nitrate mixed solution is packed in the syringe of electrospinning device, carry out electrospinning, the voltage of electrospinning is 17kv, and ejection flow rate is 4 μ l / min, obtains Nylon 6 / chitosan / Ag nanofiber membrane. The metal particles in the nylon 6 / chitosan / noble metal nanofiber film are 0 valence, and exposed on the fibe...

Embodiment 2

[0034]6.8 g of nylon 6 with a molecular weight of 100,000 g / mol was dissolved in 50 ml of formic acid to obtain a mother liquor. Add molecular weight in mother liquor and be 200000g / mol chitosan, deacetylation degree 70%, the weight ratio of chitosan and nylon 25%, after stirring 72h, obtain nylon 6 / chitosan mixed solution; (3) to nylon 6 Add 0.85g silver nitrate in the / chitosan mixed solution, the total mass ratio of silver nitrate and chitosan and nylon 6 is 10%, after stirring 24h, stand still 8h, obtain nylon 6 / chitosan / silver nitrate mixed solution, solution The viscosity is 400cP; (4) the above-mentioned nylon 6 / chitosan / silver nitrate mixed solution is loaded into the syringe of the electrospinning device, and the electrospinning is carried out, the voltage of the electrospinning is 17kv, and the ejection flow rate is 1μl / min A nylon 6 / chitosan / Ag nanofiber membrane was obtained. By spinning on a copper net for 1min, the sample of TEM was prepared to analyze the partic...

Embodiment 3

[0036] 0.5 g of nylon 6 with a molecular weight of 1000 g / mol was dissolved in 5 ml of formic acid to obtain a mother liquor. Add molecular weight in mother liquor and be 2000g / mol chitosan, deacetylation degree 100%, chitosan and nylon weight ratio 45%, obtain nylon 6 / chitosan mixed solution after stirring 12h; (3) to nylon 6 / Add 0.005g silver nitrate to the chitosan mixed solution, the total mass ratio of silver nitrate to chitosan and nylon 6 is 1%, after stirring for 48h, stand still for 8h to obtain the mixed solution of nylon 6 / chitosan / silver nitrate, the solution viscosity It is 5000cP; (4) above-mentioned nylon 6 / chitosan / silver nitrate mixed solution is packed in the syringe of electrospinning device, carry out electrospinning, the voltage of electrospinning is 20kv, and ejection flow rate is 20 μ l / min, obtains Nylon 6 / chitosan / Ag nanofiber membrane. By spinning on a copper net for 1min, the sample of TEM was prepared to analyze the particle size of the metal part...

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Abstract

The invention relates to a preparation method of nylon 6 / chitosan / noble metal nanofibers. The preparation method comprises the following specific preparation steps of (1) dissolving nylon 6 in formic acid to prepare mother liquor; (2) adding chitosan into the mother liquor to obtain a nylon 6 / chitosan mixed solution; (3) adding metal salt into the nylon 6 / chitosan mixed solution, stirring and standing to obtain a nylon 6 / chitosan / metal salt mixed solution; and (4) filling the nylon 6 / chitosan / metal salt mixed solution into an injector of an electrostatic spinning device, and performing electrostatic spinning to obtain a nylon 6 / chitosan / noble metal nanofiber membrane. By utilizing the characteristics of easy phase splitting and surface migration of chitosan and nylon 6, noble metal nanoparticles can break through the surface energy constraint of nanofibers and migrate to the surfaces of the fibers under the action of a high-voltage electric field, so that the dye degradation efficiency can be improved; and the method is low in cost, clean, green and efficient.

Description

technical field [0001] The invention relates to a method for preparing nanofibers, in particular to a method for preparing nylon 6 / chitosan / noble metal nanofibers. Background technique [0002] Electrospinning is an important technique widely used in the preparation of nanofibers. Unlike traditional methods, electrospinning to form fine fibers is based on uniaxial stretching (or elongation) of viscoelastic jets of polymer solutions or melts. . Using the electrostatic force as the traction force, the polymer solution or melt is charged with high-voltage static electricity, and the charged polymer droplets are stretched under the action of the electric field force. When the voltage reaches a certain value, the electrostatic force overcomes the surface tension of the polymer solution and forces The solution is sprayed from the nozzle to form a jet, and the solvent evaporates or solidifies during the spraying process, and finally falls on the receiving plate to form a nanofiber...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D04H1/4382D04H1/728D01D5/00D01D5/30D01F8/12D01F8/18D01F1/10
CPCD04H1/4382D04H1/728D01D5/0092D01D5/003D01D5/30D01F8/12D01F8/18D01F1/10
Inventor 周琦楼晨曦赵彬清
Owner NINGBO UNIVERSITY OF TECHNOLOGY
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