SKIN-CORE STRUCTURE FIBERS WITH BOTH INFRARED AND RADAR STEALTH, PREPARATION METHOD THEREFOR, AND USE THEREOF

Abstract

Skin-core structure fibers with both infrared and radar stealth, a preparation method therefor, and the use thereof are provided. The fibers are as follows: a core material of the skin-core structure fibers comprises the following raw materials in parts by weight: 10 parts of paraffin; 0.7-1.5 parts of an electromagnetic wave absorbent; and 1 part of a high-molecular polymer, wherein the electromagnetic wave absorbent is one or more of ferroferric oxide-intercalated graphene oxide, nano ferroferric oxide and carbon black, and wherein the skin-core structure fiber is obtained by spinning the core material with a skin-layer material.

Claims

1. (canceled)

2. (canceled)

3. A method for preparing skin-core structure fibers with both infrared and radar stealth, comprising the following steps: Step 1), melting in parts by weight 10 parts of paraffin and adding with 0.7 parts to 1.5 parts of an electromagnetic wave absorbent, stirring evenly and thoroughly to obtain molten solution S1, wherein the electromagnetic wave absorbent is one or more of a ferroferric oxide-intercalated graphene oxide, a nano ferroferric oxide and a carbon black; Step 2), melting 1 part of a high-molecular polymer, subsequently adding the high-molecular polymer into the molten solution S1, stirring thoroughly and evenly and then drying to obtain a core material S2, wherein the high-molecular polymer is one or more of a polyethylene, a polypropylene and an ethylene-vinyl acetate; Step 3), dissolving the polyacrylonitrile into a N, N-dimethylacetamide, stirring evenly and standing still, to obtain an external phase spinning solution; and Step 4), taking the core material S2 as the core material and taking the external phase spinning solution as a skin material for solution spinning, to obtain the skin-core structure fibers with both infrared and radar stealth.

4. The method for preparing the skin-core structure fibers with both the infrared and the radar stealth according to claim 3, wherein a melting temperature of the paraffin in Step 1) is 70? C.

5. The method for preparing the skin-core structure fibers with both the infrared and the radar stealth according to claim 3, wherein a melting temperature of the high-molecular polymer in Step 2) ranges from 130? C. to 140? C.

6. The method for preparing the skin-core structure fibers with both the infrared and the radar stealth according to claim 3, wherein a standing time in Step 3) is 10 hours.

7. The method for preparing the skin-core structure fibers with both the infrared and the radar stealth according to claim 3, wherein a mass concentration of the polyacrylonitrile in the external phase spinning solution in Step 3) ranges from 20% to 25%.

8. The method for preparing the skin-core structure fibers with both the infrared and the radar stealth according to claim 3, wherein a nozzle temperature of the core material in Step 4) is controlled from 140? ? C. to 150? C.

9. A use of skin-core structure fibers with both infrared and radar stealth prepared by the method according to claim 3 in a preparation of an infrared stealth material and a radar stealth material.

10. The use according to claim 9, wherein the infrared stealth material and the radar stealth material are needled felt.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0025] FIG. 1 illustrates an SEM diagram of fiber materials prepared in one embodiment of the present disclosure.

[0026] FIG. 2 illustrates a thermal infrared imaging placed on a human hand of a fiber material needled felt made in one embodiment of the present disclosure.

[0027] FIG. 3 illustrates a diagram of an electromagnetic wave absorption performance of the fiber material needled felt (with a thickness of 10 mm) prepared in one embodiment of the present disclosure.

[0028] FIG. 4 illustrates a thermal infrared imaging placed on the human hand of the fiber material needled felt made in one embodiment of the present disclosure.

[0029] FIG. 5 illustrates a diagram of the electromagnetic wave absorption performance of the fiber material needled felt (with a thickness of 10 mm) prepared in one embodiment of the present disclosure.

[0030] FIG. 6 illustrates a thermal infrared imaging placed on the human hand of the fiber material needled felt made in one embodiment of the present disclosure.

[0031] FIG. 7 illustrates a diagram of the electromagnetic wave absorption performance of the fiber material needled felt (with a thickness of 10 mm) prepared in one embodiment of the present disclosure.

DETAILED DESCRIPTION OF THE EMBODIMENTS

[0032] The present disclosure will be detailedly described below in conjunction with the accompanying drawings and the specific embodiments.

[0033] In one embodiment, provided is skin-core structure fibers with both infrared and radar stealth. A core material of the skin-core structure fibers includes the following raw materials in parts by weight: 10 parts of paraffin. 0.7 parts to 1.5 parts of an electromagnetic wave absorbent, and 1 part of a high-molecular polymer. The electromagnetic wave absorbent is one or more of a ferroferric oxide-intercalated graphene oxide, a nano ferroferric oxide and a carbon black.

[0034] The skin-core structure fibers are obtained by means of spinning the core material with a skin-layer material.

[0035] The above-mentioned electromagnetic wave absorbent is one or more of a ferroferric oxide-intercalated graphene oxide, a nano ferroferric oxide and a carbon black.

[0036] The above-mentioned high-molecular polymer is one or more of a polyethylene, a polypropylene and an ethylene-vinyl acetate.

[0037] Provided is a method for preparing the skin-core structure fibers with both infrared and radar stealth. The method includes the following steps. [0038] In Step 1). 1000 g paraffin are melted at 70? C. and 50 g ferroferric oxide-intercalated graphene oxide and 20 g carbon black are added into the melted paraffin, stirred evenly and thoroughly to prepare the solution S1 of the infrared and electromagnetic wave absorbing material. [0039] In Step 2). 50 g polyethylene. 30 g polypropylene and 20 g ethylene-vinyl acetate are melted at 140? C., and subsequently are added into the solution S1, stirred thoroughly and evenly, and then the molten solution S1 is dried to prepare the core material S2. [0040] In Step 3), the polyacrylonitrile is dissolved into a N. N-dimethylacetamide, stirred evenly and stood still for 10 hours to prepare the external phase spinning solution with a mass concentration of 25% polyacrylonitrile (polyacrylonitrile solution). [0041] In Step 4), the core material S2 is taken as the core material (a nozzle temperature of the core material is controlled at 150?) C. and the polyacrylonitrile solution is taken as a skin material for the solution spinning, to prepare the skin-core structure fibers. As illustrated in FIG. 1, under a scanning electron microscopy, it can be obviously seen that a skin core structure is formed, and the inner layer is the core layer, and the outer layer is wrapped around the core layer.

[0042] After the tests, the fiber materials prepared in this embodiment, whose phase transition enthalpy is up to 95.1 J/g, and is equipped with ultra-low infrared transmittance in the infrared band ranges from 3 ?m to 15 ?m. The fibers are needled into the felt and the felt is placed on the back of the human hand, and the thermal imaging detection image of the human hand is as illustrated in FIG. 2. The felt with a thickness of 10 mm can reach the absorption efficiency below ?10 dB in the range from 8 GHz to 18 GHz, and the electromagnetic wave absorption performance is as illustrated in FIG. 3.

[0043] In one embodiment, provided is a method for preparing the skin-core structure fibers with both infrared and radar stealth. The method includes the following steps. [0044] In Step 1). 1000 g paraffin are melted at 70? C. and 100 g nano ferroferric oxide and 50 g carbon black are added into the melted paraffin, stirred evenly and thoroughly to prepare the solution S1 of the infrared and electromagnetic wave absorbing material. [0045] In Step 2). 50 g polyethylene. 30 g polypropylene and 20 g ethylene-vinyl acetate are melted at 130? C., and subsequently are added into the molten solution S1, stirred thoroughly and evenly, and then the molten solution S1 is dried to prepare the core material S2. [0046] In Step 3), the polyacrylonitrile is dissolved into a N. N-dimethylacetamide, stirred evenly and stood still for 10 hours to prepare the external phase spinning solution with a mass concentration of 25% polyacrylonitrile (polyacrylonitrile solution). [0047] In Step 4), the core material S2 is taken as the core material (a nozzle temperature of the core material is controlled at 140? C.) and the polyacrylonitrile solution is taken as a skin material for the solution spinning, to prepare the skin-core structure fibers.

[0048] After the tests, the fiber materials prepared in this embodiment, whose phase transition enthalpy is up to 100.1 J/g, and is equipped with ultra-low infrared transmittance in the infrared band ranges from 3 ?m to 15 ?m. The fibers are needled into the felt and the felt is placed on the back of the human hand, and the thermal imaging detection image of the human hand is as illustrated in FIG. 4. The felt with a thickness of 10 mm can reach the absorption efficiency below ?10 dB in the range from 8 GHz to 18 GHz, and the electromagnetic wave absorption performance is as illustrated in FIG. 5.

[0049] In one embodiment, provided is a method for preparing the skin-core structure fibers with both infrared and radar stealth. The method includes the following steps. [0050] In Step 1). 1000 g paraffin are melted at 70? C. and 70 g ferroferric oxide-intercalated graphene oxide and 30 g carbon black are added into the melted paraffin, stirred evenly and thoroughly to prepare the solution S1 of the infrared and electromagnetic wave absorbing material. [0051] In Step 2), 50 g polyethylene, 30 g polypropylene and 20 g ethylene-vinyl acetate are melted at 130? C., and subsequently are added into the molten solution S1, stirred thoroughly and evenly, and then the molten solution S1 is dried to prepare the core material S2. [0052] In Step 3), the polyacrylonitrile is dissolved into a N, N-dimethylacetamide, stirred evenly and stood still for 10 hours to prepare the external phase spinning solution with a mass concentration of 25% polyacrylonitrile (polyacrylonitrile solution). [0053] In Step 4), the core material S2 is taken as the core material (a nozzle temperature of the core material is controlled at 140? C.) and the polyacrylonitrile solution is taken as a skin material for the solution spinning, to prepare the skin-core structure fibers.

[0054] After the tests, the fiber materials prepared in this embodiment, whose phase transition enthalpy is up to 99 J/g, and is equipped with ultra-low infrared transmittance in the infrared band ranges from 3 ?m to 15 ?m. The fibers are needled into the felt and the felt is placed on the back of the human hand, and the thermal imaging detection image of the human hand is as illustrated in FIG. 6. The absorption frequency band of the felt with a thickness of 10 mm that reaches the absorption efficiency below ?10 dB in the range from 8 GHz to 18 GHz is 8.7 GHZ, and the electromagnetic wave absorption performance is as illustrated in FIG. 7.