An ultra-light, ultra-thin flexible nano-metal/nano-fiber composite film with X-ray shielding properties and its preparation method

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: 2019-07-09
吉林省贞靓科技有限公司
View PDF6 Cites 0 Cited by
  • Summary
  • 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 field of electromagnetic shielding, but there are few studies on shielding high-energy rays such as X-rays.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • An ultra-light, ultra-thin flexible nano-metal/nano-fiber composite film with X-ray shielding properties and its preparation method
  • An ultra-light, ultra-thin flexible nano-metal/nano-fiber composite film with X-ray shielding properties and its preparation method
  • An ultra-light, ultra-thin flexible nano-metal/nano-fiber composite film with X-ray shielding properties and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Step 1, add 0.4g polyacrylonitrile (Mn=80000) and 0.6g polyurethane (Mn=8000) to a conical flask filled with 10g N,N-dimethylformamide (DMF), and place in a water bath at 60°C Heat and magnetically stir for 6 hours until the polymer is completely dissolved, 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 the electrospinning device, and carry out electrospinning under the conditions of 15kV, receiving distance of 15cm, spinneret diameter of 1.2mm, ambient temperature of 25°C and humidity of 35%. Acrylonitrile / polyurethane / silver nitrate composite precursor fibers, and the collected precursor fibers were dried in an oven at 65°C for 12 hours.

[0050] Step 2, immerse the composite nanofiber membrane obtained in step 1 in a mixed solution of 6.5g sodium hydroxide and 100mL ethylene glycol, and treat it with 500W microwave for 10s in a micr...

Embodiment 2

[0054] Step 1: Add 0.5g of polyacrylonitrile and 0.5g of polyurethane into a conical flask containing 10g of N,N-dimethylformamide (DMF), heat in a water bath at 55°C and stir magnetically for 6h until the polymer is completely dissolved , and then add 0.25g of copper nitrate, and stir at room temperature for 20h in the dark to obtain a uniform, transparent and stable spinning solution. Move it into the spinning tube, and carry out 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 were dried in an oven at 65°C for 12 hours.

[0055]Step 2, immerse the obtained metal salt / fiber film in a mixed solution of 8g sodium hydroxide and 100mL ethylene glycol, microwave in a microwave oven for 20s, and obtain a seed film with metal particles growing on the ...

Embodiment 3

[0059] Step 1: Add 0.6g of polyacrylonitrile and 0.4g of polyurethane into a conical flask containing 10g of N,N-dimethylformamide (DMF), heat in a water bath at 60°C and stir magnetically for 6h until the polymer is completely dissolved , and then add 0.2g of 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 into an oven to dry at 65°C for 12h.

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
thicknessaaaaaaaaaa
diameteraaaaaaaaaa
thicknessaaaaaaaaaa
Login to view more

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Patents(China)
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
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap