Electrostatic spinning nano-composite fiber mat and preparation method and application thereof

Abstract

The invention relates to the field of composite materials, in particular to an electrostatic spinning nano-composite fiber mat and a preparation method and application thereof. The preparation methodcomprises the steps that graphene, SiO2 and TiO2 are dissolved in a dimethylacetamide solution and then subjected to ultrasonic dispersion, and a mixed solution is obtained; the mixed solution is added into a polysulfonamide solution and stirred, and a polysulfonamide spinning solution is obtained after ultrasonic dispersion; a natural cellulose / LiCl / DMAC spinning solution and the polysulfonamidespinning solution are subjected to ultrasonic oscillation and mixed, and a spinning nanometer fiber mat is obtained; a PPS fiber non-woven fabric and the nanometer fiber mat are composited through theelectrostatic spinning technology, and the electrostatic spinning nano-composite fiber mat is obtained. The electrical conductivity, the breaking strength and the ultraviolet ray-resistant capacity of the composite fiber mat are remarkably improved, the comprehensive performance of the fiber is greatly improved, and the application field of the composite fiber mat is widened.

Description

technical field

[0001] The invention relates to the field of composite materials, in particular to an electrospun nanocomposite fiber felt and a preparation method and application thereof. Background technique

[0002] Polysulfoneamide belongs to aromatic polyamides and is a new type of high-performance textile material. Due to the introduction of a very strong electron-withdrawing group-sulfone group into its polymer chain, the electron cloud density of the nitrogen atom on the amide group is significantly reduced through the double bond conjugated system of the benzene ring, thus having excellent heat resistance and resistance. Flammability, etc., can be used in the aerospace field, protection under high temperature working environment and other civilian fields with flame retardant requirements, and has important uses in national defense and modern industry. However, polysulfoneamide has defects such as high specific resistance, easy generation of static electricity, and ...

Examples

Embodiment 1

[0035] (1) Preparation of cellulose / LiCl / DMAC spinning solution:

[0036] Warm 100 mL of DMAC to 130 °C under N 2 Add 4.6 g of shredded natural cotton fibers (polymerization degree 6000) under protection, condensing and reflux conditions, and activate for 1 hour; cool down to 100° C., quickly add 12 g of dried LiCl at this temperature, and stir at 500 r / min. Stir and dissolve for 2 hours; then lower the temperature to 20-25°C, stir and dissolve for 2 hours at a stirring speed of 300r / min, and then perform ultrasonic defoaming treatment (ultrasonic frequency is 30KHz, defoaming time is 1h) to obtain uniform and stable fibers Primer / LiCl / DMAC spinning solution.

[0037](2) Weigh 0.0048g graphene, 0.0034g of SiO2, 0.001g of TiO2 and be dispersed in the dimethylacetamide solution of 7.9952g, ultrasonic 0.5h, then mix in 40g 12wt% polysulfone amide; Above-mentioned blending The system was mechanically stirred at a speed of 300r / min for 10h, and then ultrasonically blended for 4h ...

Embodiment 2

[0040] (1) The preparation of cellulose / LiCl / DMAC spinning solution is the same as in Example 1

[0041] (2) Weigh 0.0144g graphene, 0.0150g SiO2, 0.0077g TiO2 Disperse in the dimethylacetamide solution of 7.9856g, ultrasonic 0.5h, then mix in 40g 12wt% polysulfone amide; The system was mechanically stirred at a speed of 300r / min for 10h, and then ultrasonically blended for 4h at an ultrasonic frequency of 30KHz to form a polysulfoneamide spinning solution with good uniformity; then the prepared spinning solution was mixed with the step ( The cellulose / LiCl / DMAC spinning solution in 1) was blended, and mechanically stirred at a speed of 300 r / min for 3 hours to obtain a uniform spinning solution.

[0042] (3) The PPS fiber non-woven fabric is used as the receiving base fabric, and the electrospinning jet is received by electrospinning using an electrospinning device to obtain a nanocomposite fiber mat. The electrospinning voltage is 25kV, the spinning receiving distance is 10...

Embodiment 3

[0044] (1) The preparation of cellulose / LiCl / DMAC spinning solution is the same as in Example 1

[0045] (2) Weigh 0.024g graphene, 0.012g of SiO2, 0.012g of TiO2 and be dispersed in the dimethylacetamide solution of 7.9760g, ultrasonic 0.5h, then mix in 40g 12wt% polysulfone amide; The system was mechanically stirred at a speed of 300r / min for 10h, and then ultrasonically blended for 4h at an ultrasonic frequency of 30KHz to form a polysulfoneamide spinning solution with good uniformity; then the prepared spinning solution was mixed with the step ( The cellulose / LiCl / DMAC spinning solution in 1) was blended, and mechanically stirred at a speed of 300 r / min for 3 hours to obtain a uniform spinning solution.

[0046] (3) Use the PPS fiber non-woven fabric as the receiving base fabric, and use the electrospinning equipment to electrospin to receive the electrospinning jet to obtain a nanocomposite fiber mat. See the attached figure 1 . The electrospinning voltage is 25kV, the ...

technical field

[0001] The invention relates to the field of composite materials, in particular to an electrospun nanocomposite fiber felt and a preparation method and application thereof. Background technique

[0002] Polysulfoneamide belongs to aromatic polyamides and is a new type of high-performance textile material. Due to the introduction of a very strong electron-withdrawing group-sulfone group into its polymer chain, the electron cloud density of the nitrogen atom on the amide group is significantly reduced through the double bond conjugated system of the benzene ring, thus having excellent heat resistance and resistance. Flammability, etc., can be used in the aerospace field, protection under high temperature working environment and other civilian fields with flame retardant requirements, and has important uses in national defense and modern industry. However, polysulfoneamide has defects such as high specific resistance, easy generation of static electricity, and ...

Examples

Embodiment 1

[0035] (1) Preparation of cellulose / LiCl / DMAC spinning solution:

[0036] Warm 100 mL of DMAC to 130 °C under N 2 Add 4.6 g of shredded natural cotton fibers (polymerization degree 6000) under protection, condensing and reflux conditions, and activate for 1 hour; cool down to 100° C., quickly add 12 g of dried LiCl at this temperature, and stir at 500 r / min. Stir and dissolve for 2 hours; then lower the temperature to 20-25°C, stir and dissolve for 2 hours at a stirring speed of 300r / min, and then perform ultrasonic defoaming treatment (ultrasonic frequency is 30KHz, defoaming time is 1h) to obtain uniform and stable fibers Primer / LiCl / DMAC spinning solution.

[0037](2) Weigh 0.0048g graphene, 0.0034g of SiO2, 0.001g of TiO2 and be dispersed in the dimethylacetamide solution of 7.9952g, ultrasonic 0.5h, then mix in 40g 12wt% polysulfone amide; Above-mentioned blending The system was mechanically stirred at a speed of 300r / min for 10h, and then ultrasonically blended for 4h ...

Embodiment 2

[0040] (1) The preparation of cellulose / LiCl / DMAC spinning solution is the same as in Example 1

[0041] (2) Weigh 0.0144g graphene, 0.0150g SiO2, 0.0077g TiO2 Disperse in the dimethylacetamide solution of 7.9856g, ultrasonic 0.5h, then mix in 40g 12wt% polysulfone amide; The system was mechanically stirred at a speed of 300r / min for 10h, and then ultrasonically blended for 4h at an ultrasonic frequency of 30KHz to form a polysulfoneamide spinning solution with good uniformity; then the prepared spinning solution was mixed with the step ( The cellulose / LiCl / DMAC spinning solution in 1) was blended, and mechanically stirred at a speed of 300 r / min for 3 hours to obtain a uniform spinning solution.

[0042] (3) The PPS fiber non-woven fabric is used as the receiving base fabric, and the electrospinning jet is received by electrospinning using an electrospinning device to obtain a nanocomposite fiber mat. The electrospinning voltage is 25kV, the spinning receiving distance is 10...

Embodiment 3

[0044] (1) The preparation of cellulose / LiCl / DMAC spinning solution is the same as in Example 1

[0045] (2) Weigh 0.024g graphene, 0.012g of SiO2, 0.012g of TiO2 and be dispersed in the dimethylacetamide solution of 7.9760g, ultrasonic 0.5h, then mix in 40g 12wt% polysulfone amide; The system was mechanically stirred at a speed of 300r / min for 10h, and then ultrasonically blended for 4h at an ultrasonic frequency of 30KHz to form a polysulfoneamide spinning solution with good uniformity; then the prepared spinning solution was mixed with the step ( The cellulose / LiCl / DMAC spinning solution in 1) was blended, and mechanically stirred at a speed of 300 r / min for 3 hours to obtain a uniform spinning solution.

[0046] (3) Use the PPS fiber non-woven fabric as the receiving base fabric, and use the electrospinning equipment to electrospin to receive the electrospinning jet to obtain a nanocomposite fiber mat. See the attached figure 1 . The electrospinning voltage is 25kV, the ...

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