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A preparation method of bionic high-strength and high-toughness nanocomposite fibers

A nano-composite fiber, high-strength and high-toughness technology, applied in wet spinning, inorganic raw rayon, etc., can solve the problems of difficulty in direct application and small size of nano-materials, and achieve stable assembly process, low cost, and simple raw materials. easy-to-get effect

Active Publication Date: 2021-04-27
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the extremely small size of nanomaterials, it is difficult to directly apply

Method used

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  • A preparation method of bionic high-strength and high-toughness nanocomposite fibers
  • A preparation method of bionic high-strength and high-toughness nanocomposite fibers
  • A preparation method of bionic high-strength and high-toughness nanocomposite fibers

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Preparation method of bionic high-strength and high-toughness graphene oxide-zirconia nanocomposite fibers

[0035] In the first step, prepare 50 mL of buffer solution with a pH value of 7.5 at room temperature, and stir for 10-30 minutes to obtain a uniformly mixed solution;

[0036] In the second step, take the homogeneously mixed solution obtained in the first step, add 5 mg of graphene oxide, stir at room temperature, and ultrasonically disperse evenly to obtain a brown-yellow graphene oxide solution with a mass concentration of 0.1 g / L;

[0037] In the third step, 14 mg of zirconium oxychloride octahydrate was added to the graphene oxide solution obtained in the second step, and the temperature was controlled at 25° C. and stirred for 30 minutes to obtain a uniformly mixed solution;

[0038] In the fourth step, heat the homogeneously mixed solution obtained in the third step to 60°C and continue to stir for 3 hours, then cool down to room temperature naturally, ult...

Embodiment 2

[0044] Preparation method of biomimetic high-toughness graphene oxide-zirconia nanocomposite fibers

[0045] In the first step, prepare 50 mL of buffer solution with a pH value of 7.5 at room temperature, and stir for 10-30 minutes to obtain a uniformly mixed solution;

[0046] In the second step, take the homogeneously mixed solution obtained in the first step, add 5 mg of graphene oxide, stir at room temperature, and ultrasonically disperse evenly to obtain a brown-yellow graphene oxide solution with a mass concentration of 0.1 g / L;

[0047] In the third step, 8 mg of zirconium oxychloride octahydrate was added to the graphene oxide solution obtained in the second step, and the temperature was controlled at 25° C. and stirred for 30 minutes to obtain a uniformly mixed solution;

[0048] In the fourth step, the homogeneously mixed solution obtained in the third step was heated to 40° C., and continued to stir for 2 hours, then cooled down to room temperature naturally, and the ...

Embodiment 3

[0054] Preparation method of biomimetic graphene oxide nanocomposite fiber

[0055] The first step is to take a certain amount of graphene oxide, add it to water, and prepare a graphene oxide spinning solution with a concentration of 5g / L, and disperse evenly by ultrasonication for 2 hours;

[0056] The second step is to prepare an ethanol-water coagulation bath containing 5wt% calcium chloride, 0.5wt% polyvinyl alcohol and 0.005wt% glutaraldehyde, wherein the volume ratio of ethanol to water is 1:3, and it is obtained after stirring and ultrasonication Mixed coagulation bath solution;

[0057] The third step is to inject the uniformly dispersed spinning solution obtained in the first step into the syringe, inject it into the coagulation bath obtained in the second step at a rate of 0.13mL / min, and let it stand for 0.5h to obtain the gel fiber;

[0058] In the fourth step, the gel fiber obtained in the third step is washed and dried naturally, and then heat-treated at a const...

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Abstract

The invention belongs to the technical field of preparation of light-weight and high-strength nanometer materials, and relates to a preparation method of bionic high-strength and high-toughness nanocomposite fibers. The method uses zirconium oxychloride octahydrate as a raw material, first prepares nano-sheet materials, and then uses wet spinning technology to prepare graphene oxide-zirconia high-strength and high-toughness composite materials with nanoscale regularly arranged shell-like structures. The specific method is (1) preparing a standard buffer solution at room temperature; (2) adding a certain amount of graphene oxide and zirconium salt into the solution, stirring evenly, heating, stirring for 3 hours, centrifuging and washing the obtained precipitate; (3) preparing a coagulation bath; (4) The resulting precipitate is prepared into a spinning solution with a certain concentration, injected into a coagulation bath, and left to stand for 0.5‑24 hours to obtain gel fibers; (5) After washing, drying and heat treatment, bionic high-strength high-strength fibers can be obtained. tough nanocomposites.

Description

technical field [0001] The invention belongs to the technical field of preparation of light-weight and high-strength nano-composite fiber materials, and relates to a preparation method of bionic high-strength and high-toughness nano-composite fibers. Background technique [0002] With the rapid development of aerospace technology, the requirements for materials in new aircraft and spacecraft are getting higher and higher. Compared with traditional metal materials, ceramic materials have higher chemical stability and thermomechanical stability, so they are often used in various aerospace vehicles. As a ceramic material with excellent performance, zirconia ceramics have been widely used in the fields of thermal barrier materials, structural reinforcement materials and printed circuit board materials. However, because the crystal grains in traditional zirconia materials are too large and not easy to slide, the overall material performance is brittle, which greatly limits its a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F9/08D01D5/06
CPCD01D5/06D01F9/08
Inventor 郭林李逢时赵赫威
Owner BEIHANG UNIV
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