Super-light ultrathin flexible nano metal/nanofiber composite membrane with X-ray shielding property and preparation method of super-light ultrathin flexible nano metal/nanofiber composite membrane

A nanofiber and ray shielding technology, which is applied in the field of X-ray shielding materials, can solve the problems of less research on high-energy ray shielding such as X-rays, and achieve the effect of uniform particle distribution and dense and continuous accumulation

Active Publication Date: 2017-06-13
吉林省贞靓科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In recent years, high-voltage electrospun nanofibers have been widely studied by scholars in the f

Method used

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  • Super-light ultrathin flexible nano metal/nanofiber composite membrane with X-ray shielding property and preparation method of super-light ultrathin flexible nano metal/nanofiber composite membrane
  • Super-light ultrathin flexible nano metal/nanofiber composite membrane with X-ray shielding property and preparation method of super-light ultrathin flexible nano metal/nanofiber composite membrane
  • Super-light ultrathin flexible nano metal/nanofiber composite membrane with X-ray shielding property and preparation method of super-light ultrathin flexible nano metal/nanofiber composite membrane

Examples

Experimental program
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Example Embodiment

[0048] Example 1

[0049] Step 1. Add 0.4g polyacrylonitrile (Mn=80000) and 0.6g polyurethane (Mn=8000) into an Erlenmeyer flask containing 10g N,N-dimethylformamide (DMF), and in a 60℃ water bath Heat and magnetically stir for 6 hours until the polymer is completely dissolved, and then add 0.2 g of silver nitrate at room temperature and avoid light and stir for 20 hours to obtain a uniform, transparent and stable spinning solution. Move it into the spinneret of an electrospinning device, and perform electrospinning under the conditions of a voltage of 15kV, a receiving distance of 15cm, a spinneret diameter of 1.2mm, an ambient temperature of 25°C, and a humidity of 35%. Acrylonitrile / polyurethane / silver nitrate composite precursor fibers, and the collected precursor fibers are placed in an oven for drying at 65°C for 12 hours.

[0050] Step 2: Immerse the composite nanofiber membrane obtained in step 1 in a mixed solution of 6.5 g sodium hydroxide and 100 mL ethylene glycol, and...

Example Embodiment

[0053] Example 2

[0054] Step 1. Add 0.5g polyacrylonitrile and 0.5g polyurethane into an Erlenmeyer flask containing 10g N,N-dimethylformamide (DMF), heat in a water bath at 55°C and stir magnetically for 6 hours until the polymer is completely dissolved , Then add 0.25g copper nitrate, and stir for 20h at room temperature and avoid light to obtain a uniform, transparent and stable spinning solution. Move it into a spinning tube, and perform electrospinning under the conditions of a voltage of 15kV, a receiving distance of 15cm, a spinneret diameter of 1.2mm, an ambient temperature of 25°C and a humidity of 35% to obtain polyacrylonitrile / Polyurethane / copper nitrate composite precursor fibers, and the collected fibers are placed in an oven at 65°C for 12 hours.

[0055] Step 2: Immerse the obtained metal salt / fiber membrane in a mixed solution of 8 g sodium hydroxide and 100 mL ethylene glycol, and microwave it in a microwave oven for 20 s to obtain a seed membrane with metal p...

Example Embodiment

[0058] Example 3

[0059] Step 1. Add 0.6g polyacrylonitrile and 0.4g polyurethane into an Erlenmeyer flask containing 10g N,N-dimethylformamide (DMF), heat it in a 60℃ water bath and stir magnetically for 6 hours until the polymer is completely dissolved , Then add 0.2g nickel nitrate at room temperature and avoid light and stir for 20h to obtain a uniform, transparent and stable spinning solution. Move it into an electrospinning device, and perform electrospinning under the conditions of a voltage of 15kV, a receiving distance of 15cm, a spinneret diameter of 1.2mm, an ambient temperature of 25°C, and a humidity of 35% to obtain polyacrylonitrile. / Polyurethane / nickel nitrate composite precursor fiber, and put the collected composite fiber in an oven at 65°C for 12h.

[0060] Step 2: Immerse the obtained nanofiber membrane in a mixed solution of 8.5g of sodium hydroxide and 100mL of ethylene glycol, and microwave for 30s in a microwave oven to obtain a seed membrane with metal p...

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Abstract

The invention discloses a super-light ultrathin flexible nano metal/nanofiber composite membrane with an X-ray shielding property and a preparation method of the super-light ultrathin flexible nano metal/nanofiber composite membrane, and belongs to the technical field of X-ray shielding materials. The preparation method comprises the following steps: by using a method that an electrospinning technique and a metal chemical sedimentation technique are combined, forming nano metal particles which are of specific morphology and are continuously and tightly accumulated on surfaces of organic nanofibers, forming a nanofiber membrane with nano metal sedimentation, overlapping nanofiber membranes layer by layer through hot pressing or with a resin reinforcing agent, thereby obtaining the super-light ultrathin flexible nano metal/nanofiber composite membrane. The density of the membrane is only 5-20% of that of a pure metal, the conductivity of the membrane has anisotropism, the transverse conductivity has properties of metal conductivity, and the longitudinal conductivity accounts for 1/10 million of the transverse conductivity. Due to adsorption loss of the nano metal particles, multiple times of reflection of fiber membranes, nano structure scattering and macroscopic structure scattering, incident X-rays are hard to overflow, then effective absorption can be achieved, and X-ray equivalent wide frequency band electromagnetic protection materials of novel full-nano structures with good properties can be prepared.

Description

technical field [0001] The invention belongs to the technical field of X-ray shielding materials, and in particular relates to an ultra-thin and ultra-light flexible nano-metal / nano-fiber composite film with X-ray shielding performance and a preparation method thereof. Background technique [0002] X-ray is an electromagnetic wave with extremely short wavelength, high frequency, high energy and strong penetrating ability. Its wavelength is about 0.001-100nm, and its energy range is 0.1eV-10GeV. With the deepening and development of X-ray research, X-ray applications are widely distributed in various fields such as hospitals, nuclear power plants, semiconductor processing, and electronic components, such as transmission imaging used in hospitals, X-ray tomography, and cardiology. Angioplasty technology, anti-nuclear radiation suits and so on. Workers who have been exposed to X-rays for a long time will suffer great harm to their bodies. Biological cells can be inhibited, de...

Claims

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Application Information

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IPC IPC(8): B29C65/02D01F1/10D01F8/08D01F8/16C23C18/42C23C18/40C23C18/52C23C18/48C23C18/20B29L7/00B29L9/00
CPCB29C65/02B29C66/028B29C66/45B29C66/729B29C66/731B29C66/73141B29L2007/00B29L2009/00C23C18/2066C23C18/405C23C18/42C23C18/48C23C18/52D01F1/10D01F8/08D01F8/16
Inventor 王策姬鹤张楠金昌显
Owner 吉林省贞靓科技有限公司
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