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Preparation method of MXene/sodium alginate composite non-woven fabric

A non-woven fabric, sodium alginate technology, used in textiles and papermaking, rayon manufacturing, chemical post-processing of rayon, etc., can solve the problems of difficult processing and molding, low MXene loading, fiber discontinuous production efficiency, etc. Excellent electromagnetic shielding performance, low cost and low price effect

Pending Publication Date: 2021-12-10
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a kind of preparation method of MXene / sodium alginate composite non-woven fabric in order to solve the problems such as difficulty in processing and molding, low MXene load, discontinuous fiber and low production efficiency in the preparation process of MXene fabric, the method Composite nonwoven fabrics composed of MXene / SA continuous fibers were prepared by submerged spin spinning method using natural polymer sodium alginate with excellent performance as interlayer binder

Method used

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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  • Preparation method of MXene/sodium alginate composite non-woven fabric
  • Preparation method of MXene/sodium alginate composite non-woven fabric

Examples

Experimental program
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Effect test

Embodiment 1

[0029] A method for preparing MXene / SA composite non-woven fabrics by submerged spinning method is carried out according to the following steps:

[0030] Step 1. Preparation of MXene / SA composite solution: Add 2g of sodium alginate to 100ml of MXene solution with a concentration of 20mg / ml, and stir at 50°C for 18h to obtain MXene / SA composite solution;

[0031] Step 2, the preparation of coagulation bath: the massfraction of 1800ml is 5% CaCl 2 Add the solution to 300ml of isopropanol and stir until there is no obvious layering;

[0032] Step 3. Preparation of MXene / SA composite non-woven fabric: inject the MXene / SA composite solution into the spinning equipment for spinning, and at the same time use a cylindrical collection device with a rotor in the coagulation bath to collect the fibers. The continuous fiber bundles were punched perpendicular to the orientation direction, the punching pressure was 5MPa, and the punching time was 300s. Finally, the stamped samples were pl...

Embodiment 2

[0035] A method for preparing MXene / SA composite non-woven fabrics by submerged spinning method is carried out according to the following steps:

[0036] Step 1. Preparation of MXene / SA composite solution: Add 1 g of sodium alginate to 250 ml of MXene solution with a concentration of 20 mg / ml, and stir at 25° C. for 24 hours to obtain MXene / SA composite solution;

[0037] Step 2, the preparation of coagulation bath: the mass fraction of 1200ml is 5% CaCl 2 Add the solution into 1800ml of isopropanol and stir until there is no obvious layering;

[0038] Step 3. Preparation of MXene / SA composite non-woven fabric: inject the MXene / SA composite solution into the spinning equipment for spinning, and at the same time use a cylindrical collection device with a rotor in the coagulation bath to collect the fibers. The continuous fiber bundles are punched perpendicular to the orientation direction, the punching pressure is 0.02MPa, and the time is 30s. Finally, the stamped samples wer...

Embodiment 3

[0041]A method for preparing MXene / SA composite non-woven fabrics by submerged spinning method is carried out according to the following steps:

[0042] Step 1. Preparation of MXene / SA composite solution: Add 1 g of sodium alginate to 150 ml of MXene solution with a concentration of 20 mg / ml, and stir at 35° C. for 18 hours to obtain a moderately viscous MXene / SA composite solution;

[0043] Step 2, the preparation of coagulation bath: the mass fraction of 2400ml is 5% CaCl 2 Add the solution into 600ml of isopropanol and stir until there is no obvious layering;

[0044] Step 3. Preparation of MXene / SA composite non-woven fabric: inject the MXene / SA composite solution into the spinning equipment for spinning, and at the same time use a cylindrical collection device with a rotor in the coagulation bath to collect the fibers. The continuous fiber bundles were punched perpendicular to the orientation direction, the punching pressure was 0.2MPa, and the punching time was 200s. F...

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Abstract

The invention relates to a preparation method of an MXene / sodium alginate composite non-woven fabric. In order to solve the problems of difficult processing and forming, non-continuous fibers, low production efficiency and the like in the preparation process of an MXene fabric, the preparation process comprises the following steps of obtaining an MXene / SA composite solution through magnetic stirring, injecting the MXene / SA composite solution into thread throwing equipment for thread throwing, solidifying the fibers by using a coagulating bath, collecting the fibers on a cylindrical collecting device, and obtaining the MXene / SA composite non-woven fabric through a simple stamping means. Monofilaments are directionally arranged in the axial direction of the fibers, so that the mechanical property of the fabric can be greatly improved. The surface of the composite fiber has an obvious groove and wrinkle structure and porosity generated by monofilament stacking, the multistage morphology characteristic is very beneficial to absorption of electromagnetic waves, and the electromagnetic shielding effectiveness reaches about 35dB. The MXene / SA fabric prepared by the invention has excellent electromagnetic shielding performance and mechanical property, and meanwhile, the preparation method has the characteristics of simplicity, high efficiency, low cost and the like.

Description

technical field [0001] The invention belongs to the technical field of nonwoven fabric preparation, and in particular relates to a preparation method of MXene / sodium alginate composite nonwoven fabric. Background technique [0002] MXene is a new type of two-dimensional transition metal carbide or / and nitride that has developed rapidly in recent years. Its general structural formula is M n+1 x n T x , where M is an early transition metal, X is carbon and / or nitrogen, and T x represents the terminal group. MXene has all the basic properties required for efficient EMI shielding materials, namely good electrical conductivity, large specific surface area, light weight and other properties. In addition to this, the most important thing is its easy processing characteristics. Their tunable surface chemistry facilitates the development of MXenes and composites with controllable structural design, such as fibers, films, or bulk structures, which have broad application prospects...

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): D01F9/00D01F1/10D01F11/00
CPCD01F9/00D01F1/10D01F11/00
Inventor 隋超赵国欣王超赫晓东赵予顺李钧姣苗琳琳
Owner HARBIN INST OF TECH
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