CN113862831B - Preparation method of MXene/sodium alginate composite fiber - Google Patents

Preparation method of MXene/sodium alginate composite fiber Download PDF

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CN113862831B
CN113862831B CN202111275667.9A CN202111275667A CN113862831B CN 113862831 B CN113862831 B CN 113862831B CN 202111275667 A CN202111275667 A CN 202111275667A CN 113862831 B CN113862831 B CN 113862831B
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mxene
solution
composite fiber
preparation
sodium alginate
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CN113862831A (en
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王超
隋超
赵国欣
赵予顺
赫晓东
苗琳琳
李钧姣
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Harbin Institute of Technology
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    • DTEXTILES; PAPER
    • D01NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01FCHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F9/00Artificial filaments or the like of other substances; Manufacture thereof; Apparatus specially adapted for the manufacture of carbon filaments
    • D01F9/04Artificial filaments or the like of other substances; Manufacture thereof; Apparatus specially adapted for the manufacture of carbon filaments of alginates
    • DTEXTILES; PAPER
    • D01NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01DMECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00Formation of filaments, threads, or the like
    • D01D5/06Wet spinning methods
    • DTEXTILES; PAPER
    • D01NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01DMECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00Formation of filaments, threads, or the like
    • D01D5/18Formation of filaments, threads, or the like by means of rotating spinnerets
    • DTEXTILES; PAPER
    • D01NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01FCHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F1/00General methods for the manufacture of artificial filaments or the like
    • D01F1/02Addition of substances to the spinning solution or to the melt
    • D01F1/09Addition of substances to the spinning solution or to the melt for making electroconductive or anti-static filaments

Abstract

The invention discloses a preparation method of an MXene/sodium alginate composite fiber, which aims at solving the problems of low MXene load, complex process equipment, incapability of rapid mass preparation and the like in the existing preparation method of the MXene fiber. The preparation process is as follows: SA is added into the MXene colloidal solution, and the MXene/SA composite solution is obtained through magnetic stirring. Then anhydrous CaCl is added 2 Adding the solution into deionized water, magnetically stirring until the solution is completely dissolved, adding isopropanol into the solution, magnetically stirring until the solution is not obviously layered, and obtaining a coagulating bath; and finally, injecting the MXene/SA composite solution into a yarn throwing device for yarn throwing, collecting fibers by using a coagulating bath collecting device, and cleaning and drying to obtain the MXene/SA composite fiber. The composite fiber surface has obvious groove and fold structures, and the structure is favorable for storage and transfer of charges and reflection of electromagnetic waves, and has wide application prospects in the fields of supercapacitors, sensors and electromagnetic shielding.

Description

Preparation method of MXene/sodium alginate composite fiber
Technical Field
The invention belongs to the technical field of MXene fiber preparation, and particularly relates to a preparation method of an MXene/sodium alginate composite fiber.
Background
In recent years, a new member MXene of a two-dimensional nanomaterial family has been caused by the unique structure and excellent multi-functional propertiesThere is a great deal of attention. MXene is a transition metal carbide or/and nitride, and has a structural formula of M n+1 X n T x Wherein M represents an early transition metal (Ti, zr …), X represents carbon and/or nitrogen, T x Representing end groups (e.g., -O, -OH, -F), such two-dimensional nanomaterials have all the basic properties required for efficient electromagnetic shielding materials, including light weight, large specific surface area, and excellent electrical conductivity, in addition to which the oxygen-containing groups on the MXene surface give it easy processing properties that can be assembled into macroscopic-sized fiber, film and bulk structures by different manufacturing processes, and are therefore considered as the most potential electromagnetic shielding materials. Has wide application prospect in the high and new technical fields of aerospace, national defense and the like.
However, MXene is challenging to process directly into fibers due to its small transverse dimensions and weak interactions between the plies. Fortunately, the lyotropic processing characteristics of MXene facilitate its assembly into a composite material with other materials, thereby effectively combining the superior properties of both, and researchers have introduced polymers and nanomaterials having oxygen-containing polar groups into MXene systems to assemble MXene-based composite materials having macroscopic high properties, wherein Sodium Alginate (SA) has attracted widespread attention due to its superior combination of properties. SA is polyelectrolyte derived from seaweed, and the natural biological material has excellent mechanical property, is rich in nature and is harmless to the environment. Meanwhile, SA has rich oxygen-containing functional groups (-OH, -COO and-O) and can form hydrogen bonds with the end group of MXene, so that the mechanical property of the composite material interface is further improved.
It is worth noting that the preparation of Mxene fiber is still in the starting stage at present, and the main preparation method comprises traditional electrostatic spinning and wet spinning, high-pressure conditions are usually required in the electrostatic spinning, toxic solvents are used, the loading amount of Mxene is low, the production efficiency of Mxene fiber in wet spinning is low, and long continuous fiber is difficult to prepare. There are few literature reports on work on MXene/SA composite fibers. At present, the spinning methods have some defects, such as low MXene loading, use of toxic solvents, complex process equipment, and incapability of rapid mass production.
Disclosure of Invention
The invention aims to solve the problems of difficult processing and forming, low MXene load, complex process equipment and the like in the preparation process of MXene fibers, and provides a preparation method of MXene/sodium alginate composite fibers.
According to the invention, spinning solution with certain viscosity is thrown out through a spinning nozzle rotating at a high speed, and composite solution jet contacts with a coagulating bath to coagulate and solidify fibers, so that continuous MXene composite fibers are obtained through the steps of subsequent treatment, namely cleaning and drying.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
the preparation method of the MXene/sodium alginate composite fiber comprises the following steps:
step one, preparation of an MXene/SA composite solution: adopting an in-situ hydrofluoric acid etching and ultrasonic stripping combined mode to obtain a colloid solution composed of MXene sheets, adding Sodium Alginate (SA) powder into the MXene colloid solution, and magnetically stirring for 1-48h at 25-80 ℃ to obtain a MXene/SA composite solution;
preparing a coagulating bath: anhydrous CaCl 2 Adding into deionized water, magnetically stirring to dissolve CaCl 2 The concentration of the solution is 1-10wt%, and then the solution is dissolved into CaCl 2 Adding isopropanol and CaCl into the solution 2 The volume ratio of the solution to the isopropanol is 0.1-9:1, magnetically stirring until the solution has no obvious delamination;
step three, preparation of MXene/SA composite fiber: and injecting the MXene/SA composite solution into a yarn throwing device for yarn throwing, collecting fibers by using a coagulating bath collecting device, and cleaning and drying to obtain the MXene/SA composite fiber.
Further, in the first step, the MXene is Ti in consideration of the conductivity of the composite fiber and the easiness of raw material preparation 3 C 2 T X
Further, in the first step, the mass ratio of the MXene to the SA is 0.1-10:1.
further, in consideration of balancing the conductivity and strength of the composite fiber, the mass ratio of MXene to SA is 0.1 to 6:1.
further, in the first step, the preparation process is carried out in an oil bath, the temperature of the oil bath is 25-60 ℃, and the magnetic stirring time is 6-24 hours.
Further, considering the preparation of a spinning composite solution with moderate viscosity, the oil bath temperature was 35 ℃ and the magnetic stirring time was 18h.
Further, in the second step, the CaCl 2 The concentration of the solution is 5wt% to 10wt%.
Further, in the second step, the CaCl is selected in consideration of providing the composite fiber with a proper curing degree 2 The concentration of the solution was 5wt%.
Further, in the second step, the CaCl 2 The volume ratio of the solution to the isopropanol is 1-6:1.
further, the CaCl is considered to accelerate the curing speed of the fiber 2 The volume ratio of the solution to the isopropanol is 4:1.
compared with the prior art, the invention has the beneficial effects that:
1. the MXene sheets in the fiber of the invention are arranged along the axial direction, the fiber shows high strength (the tensile strength is 100-400 Mpa), and the MXene composite fiber also shows excellent conductivity. The preparation method of the composite fiber can be completed by adopting high-speed centrifugal equipment and coagulation bath, the process equipment is simple, and meanwhile, the price of sodium alginate and other raw materials is low, so that the preparation method has the characteristic of low cost. The invention can realize the preparation of composite solution with wide range and different mass ratios, and further regulate and control the viscosity of spinning stock solution and the proportion of coagulation bath, thereby controlling the comprehensive performance of the composite fiber and having wide application prospect in the fields of electromagnetic shielding, sensing, energy storage and the like.
2. The invention provides a novel immersion type spinning process, which can realize the preparation of continuous fibers with higher MXene content without using high pressure and toxic solvents and has lower viscosity requirement on spinning solution. Meanwhile, the process has extremely high production efficiency, the yield can reach 30g/min, and the process has extremely wide application prospect in the development direction of MXene fiber industrialization.
3. The fiber obtained in the invention has the tensile strength of 100-400Mpa and the diameter of 10-30 mu m, and has potential of industrialized production. Meanwhile, the surface of the composite fiber has obvious groove and fold structures, and the structure is favorable for storage and transfer of charges and reflection of electromagnetic waves, and has wide application prospects in the fields of supercapacitors, sensors and electromagnetic shielding.
Drawings
FIG. 1 is a scanned image of the surface topography of the composite fiber prepared in example 3;
FIG. 2 is a graph showing the tensile mechanical properties of the composite fiber prepared in example 3.
Detailed Description
The following description of the present invention is provided with reference to the accompanying drawings and examples, but is not limited to the following description, and all modifications and equivalents of the present invention are included in the scope of the present invention without departing from the spirit and scope of the present invention.
Example 1:
the method for preparing the MXene/SA composite fiber by the immersion type yarn throwing method comprises the following steps:
step one, preparation of an MXene/SA composite solution: adding 6g of SA into 100ml of MXene solution with the concentration of 20mg/ml, and stirring for 6 hours at 60 ℃ to obtain a MXene/SA composite solution;
preparing a coagulating bath: 3600ml of CaCl with mass fraction of 5 percent 2 The solution was added to 600ml of isopropanol and stirred until no significant delamination occurred;
step three, preparation of MXene/SA composite fiber: and injecting the MXene/SA composite solution into a yarn throwing device for yarn throwing, collecting fibers by using a coagulating bath collecting device, and washing and drying by using ethanol and deionized water to obtain the MXene/SA composite fiber.
The tensile strength of the MXene/SA composite fiber obtained in the example is 192Mpa, which is superior to the mechanical strength of the MXene fiber reported in most of the current work.
Example 2:
the method for preparing the MXene/SA composite fiber by the immersion type yarn throwing method comprises the following steps:
step one, preparation of an MXene/SA composite solution: 1g of SA is added into 200ml of MXene solution with the concentration of 30mg/ml, and the mixture is stirred for 24 hours at the temperature of 25 ℃ to obtain MXene/SA composite solution;
preparing a coagulating bath: 1200ml of CaCl with mass fraction of 1 percent 2 The solution was added to 1200ml of isopropanol and stirred until no significant delamination was observed;
step three, preparation of MXene/SA composite fiber: and injecting the MXene/SA composite solution into a yarn throwing device for yarn throwing, collecting fibers by using a coagulating bath collecting device, and washing and drying by using ethanol and deionized water to obtain the MXene/SA composite fiber.
The tensile strength of the MXene/SA composite fiber obtained in the example is 50Mpa, which is superior to the mechanical strength of the MXene fiber reported in most of the current work.
Example 3:
the method for preparing the MXene/SA composite fiber by the immersion type yarn throwing method comprises the following steps:
step one, preparation of an MXene/SA composite solution: 2g SA is added into 100ml of MXene solution with the concentration of 20mg/ml, and the mixture is stirred for 18 hours at 35 ℃ to obtain a MXene/SA composite solution;
preparing a coagulating bath: 2400ml of CaCl with mass fraction of 5 percent 2 The solution was added to 600ml of isopropanol and stirred until no significant delamination occurred;
step three, preparation of MXene/SA composite fiber: and injecting the MXene/SA composite solution into a yarn throwing device for yarn throwing, collecting fibers by using a coagulating bath collecting device, and washing and drying by using ethanol and deionized water to obtain the MXene/SA composite fiber.
The resulting MXene/SA composite fiber of this example has a tensile strength of 169MPa, which is superior to the mechanical strength of MXene fibers reported in most of the current work, as shown in FIG. 2. As can be seen from the surface morphology scanning image of the composite fiber in the attached figure 1, the MXene sheets are arranged along the axial direction of the fiber, and the surface of the composite fiber is provided with obvious grooves and fold structures, so that the structure is favorable for charge storage and electromagnetic wave reflection, and has wide application prospects in the fields of supercapacitors and electromagnetic shielding.

Claims (7)

1. A preparation method of an MXene/sodium alginate composite fiber is characterized by comprising the following steps: the method comprises the following steps:
step one, preparation of an MXene/SA composite solution: adopting an in-situ hydrofluoric acid etching combined ultrasonic stripping mode to obtain a colloid solution composed of MXene sheets, adding sodium alginate powder into the MXene colloid solution, and magnetically stirring for 1-48h at 25-80 ℃ to obtain an MXene/SA composite solution; the MXene is Ti 3 C 2 T x The method comprises the steps of carrying out a first treatment on the surface of the The mass ratio of the MXene to the SA is 0.1-10:1, a step of; the preparation process is carried out in an oil bath with the temperature of 25-60 ℃ and the magnetic stirring time of 6-24 hours;
preparing a coagulating bath: anhydrous CaCl 2 Adding into deionized water, magnetically stirring to dissolve CaCl 2 The concentration of the solution is 1-10wt%, and then the solution is dissolved into CaCl 2 Adding isopropanol and CaCl into the solution 2 The volume ratio of the solution to the isopropanol is 0.1-9:1, magnetically stirring until the solution has no obvious delamination;
step three, preparation of MXene/SA composite fiber: and injecting the MXene/SA composite solution into a yarn throwing device for yarn throwing, collecting fibers by using a coagulating bath collecting device, and cleaning and drying to obtain the MXene/SA composite fiber.
2. The method for preparing the MXene/sodium alginate composite fiber according to claim 1, which is characterized in that: the mass ratio of the MXene to the SA is 0.1-6:1.
3. the method for preparing the MXene/sodium alginate composite fiber according to claim 1, which is characterized in that: the temperature of the oil bath is 35 ℃, and the magnetic stirring time is 18 hours.
4. The method for preparing the MXene/sodium alginate composite fiber according to claim 1, which is characterized in that: in the second step, the CaCl 2 The concentration of the solution is 5wt% to 10wt%.
5. The method for preparing the MXene/sodium alginate composite fiber according to claim 4, wherein the method comprises the following steps: in the second step, the CaCl 2 The concentration of the solution was 5wt%.
6. The method for preparing the MXene/sodium alginate composite fiber according to claim 1, which is characterized in that: in the second step, the CaCl 2 The volume ratio of the solution to the isopropanol is 1-6:1.
7. the method for preparing the MXene/sodium alginate composite fiber according to claim 6, wherein the method comprises the following steps: the CaCl 2 The volume ratio of the solution to the isopropanol is 4:1.
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