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High-strength graphene oxide composite fiber for preventing neutron radiation and preparation method thereof

A graphene composite and anti-neutron radiation technology, which is applied in the fields of fiber chemical characteristics, fire-resistant and flame-retardant filament manufacturing, rayon manufacturing, etc., can solve problems such as limited application fields, achieve large application prospects, improve mechanical properties, and operate simple effect

Active Publication Date: 2019-10-11
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Patent CN102529239B involves B 4 C can be used for neutron radiation shielding composite materials. CN108335771A relates to ZnB applied to neutron shielding materials, but they are all compounded with resin. Although the obtained resin composite materials can prevent neutron radiation, their application fields are limited

Method used

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  • High-strength graphene oxide composite fiber for preventing neutron radiation and preparation method thereof
  • High-strength graphene oxide composite fiber for preventing neutron radiation and preparation method thereof
  • High-strength graphene oxide composite fiber for preventing neutron radiation and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Preparation of aramid nanofibers: Take 1.00g of aramid fibers and 1.50g of potassium hydroxide and add them to 500mL dimethyl sulfoxide solution, stir magnetically for 8 days at 60°C and 100r / min until they are evenly mixed, then add 500mL of ultra-pure water, mechanically stirred under the conditions of 35°C and 250r / min, and continued to stir until the dispersion gelled, then filtered, washed, circulated 3 times, and then dried for later use.

[0031] B 4 Surface treatment of C and ZnB: add 640mL ethanol, 120mL ultrapure water, 4mL silane coupling agent into the beaker, then adjust the pH to 3.5 with oxalic acid, stir at room temperature for 1h, then add B 4 C or ZnB powder, heated to 60°C, stirred at constant temperature for 4 hours, the modified B 4 C and ZnB powders.

[0032] Preparation of high-strength graphene oxide composite fibers for neutron radiation protection: 8 mL of 18 mg / mL graphene oxide prepared by the Hummers method is placed in a centrifuge tube, ...

Embodiment 2

[0035] Preparation of aramid nanofiber: Add 1.00g of aramid fiber and 1.50g of potassium hydroxide into 500mL of dimethyl sulfoxide solution, stir magnetically for 6 days at 75°C and 100r / min until evenly mixed, then add 500mL of ultra-pure water, mechanically stirred at 45°C and 200r / min, and continued to stir until the dispersion gelled ( figure 1 shown), then suction filtered, washed, circulated 4 times, and then dried for later use ( figure 2shown).

[0036] B 4 Surface treatment of C: add 640mL ethanol, 120mL ultrapure water, 4mL silane coupling agent into the beaker, adjust the pH to 3.5 with oxalic acid, stir at room temperature for 1h, then add B 4 C powder, heated to 60°C, stirred at constant temperature for 4 hours, the modified B 4 C powder.

[0037] Preparation of high-strength graphene oxide composite fibers for neutron radiation protection: 8 mL of 18 mg / mL graphene oxide prepared by the Hummers method is placed in a centrifuge tube, centrifuged at a high s...

Embodiment 3

[0040] Preparation of aramid nanofiber: Take 1.00g of aramid fiber and 1.50g of potassium hydroxide and add it to 500mL dimethyl sulfoxide solution, and stir it magnetically for 12 days at 45°C and 100r / min until it is evenly mixed, then add 500mL of ultra-pure water, mechanically stirred under the conditions of 25°C and 300r / min, and continued to stir until the dispersion gelled, then suction filtered, washed, circulated 5 times, and then dried for later use.

[0041] Surface treatment of ZnB: add 640mL ethanol, 120mL ultrapure water, 4mL silane coupling agent into the beaker, then adjust the pH to 3.5 with oxalic acid, stir at room temperature for 1h, then add ZnB powder, heat to 60°C, and stir at constant temperature for 4h , that is, the modified ZnB powder is obtained.

[0042] Preparation of high-strength graphene oxide composite fiber for neutron radiation protection: 8 mL of 18 mg / mL graphene oxide prepared by the Hummers method is placed in a centrifuge tube, centrifu...

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Abstract

The invention relates to a high-strength graphene oxide composite fiber for preventing neutron radiation and a preparation method thereof. The high-strength graphene oxide composite fiber is preparedby dissolving aramid nanofibers, surface-treated B4C and ZnB, and graphene oxide to obtain a spinning solution and conducting wet spinning. Compared with the conventional radiation protection material, the graphene oxide composite fiber not only has good mechanical properties, anti-neutron radiation performance, and flame retardant performance, but also can be applied to various radiation protection devices according to the shape characteristics of the graphene oxide composite fiber.

Description

technical field [0001] The invention belongs to the field of radiation protection materials, in particular to a high-strength graphene oxide composite fiber for preventing neutron radiation and a preparation method thereof. Background technique [0002] Aramid fiber is a polyaramid polymerized by p-phenylenediamine and terephthaloyl chloride. Due to its rigid structural molecular chain, para-aramid has excellent characteristics such as high strength and high modulus, and its nanofibers still maintain excellent mechanical properties similar to filaments, which can significantly improve the strength of composite fibers. Its thermal decomposition temperature is 560°C, it has high heat resistance, high tensile strength and initial elastic modulus fiber strength, so it has great application potential in composite materials, but the finished aramid fiber is difficult to be dissolved And dispersed, the macroscopic morphological size greatly limits its application. However, throug...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/90D01F1/10D01F1/07
CPCD01F6/905D01F1/106D01F1/07
Inventor 赵昕姚梦瑶张清华董杰
Owner DONGHUA UNIV
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