Biology-base carbon nanofiber loaded cobalt ferrite wave-absorbing material and preparation method thereof

A nanofiber, bio-based carbon technology, applied in the field of materials, can solve the problems of high density, narrow frequency band, low performance, etc., and achieve the effects of uniform distribution, less environmental pollution, and improved wave absorbing performance

Inactive Publication Date: 2016-01-06
杭州治木科技有限公司
View PDF7 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the development of microwave absorbing materials at home and abroad still has shortcomings such as narrow

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
  • Biology-base carbon nanofiber loaded cobalt ferrite wave-absorbing material and preparation method thereof
  • Biology-base carbon nanofiber loaded cobalt ferrite wave-absorbing material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] 1. Preparation of lignocellulose nanofibers:

[0031] 10g of wood flour (50-70 mesh) was placed in a Soxhlet extractor, extracted with 450ml of phenylethanol solution with a volume ratio of 2:1 at 90°C for 6hrs, air-dried, transferred into a 600ml beaker, and added with 400ml of distilled water , 4.5g of sodium chlorite and 4ml of glacial acetic acid, mix well, heat to 75°C, and stir for 1hr. Then, 4ml of glacial acetic acid and 4.5g of sodium chlorite were added and heated in a magnetic heating stirrer at 75° C. for 1 hr, and this was repeated 5 times to remove lignin. The above mixture was incompletely filtered and washed with water until neutral to obtain a cellulose suspension. Dissolve 10g of potassium hydroxide into the above-mentioned cellulose suspension, raise the temperature to 90°C, keep it for 2hrs, filter and wash with water until neutral, and obtain a purified cellulose suspension. The above-mentioned purified cellulose suspension was ground 15 times at ...

Embodiment 2

[0038] 1. Preparation of lignocellulose nanofibers:

[0039] 10g of wood flour (50-70 mesh) was placed in a Soxhlet extractor, extracted with 450ml of phenylethanol solution with a volume ratio of 2:1 at 90°C for 6hrs, air-dried, transferred into a 600ml beaker, and added with 400ml of distilled water , 4.5g of sodium chlorite and 4ml of glacial acetic acid, mix well, heat to 75°C, and stir for 1hr. Then, 4ml of glacial acetic acid and 4.5g of sodium chlorite were added and heated in a magnetic heating stirrer at 75° C. for 1 hr, and this was repeated 5 times to remove lignin. The above mixture was incompletely filtered and washed with water until neutral to obtain a cellulose suspension. Dissolve 10g of potassium hydroxide into the above-mentioned cellulose suspension, raise the temperature to 90°C, keep it for 2hrs, filter and wash with water until neutral, and obtain a purified cellulose suspension. The above-mentioned purified cellulose suspension was ground 15 times at ...

Embodiment 3

[0045] 1. Preparation of lignocellulose nanofibers:

[0046] 10g of wood flour (50-70 mesh) was placed in a Soxhlet extractor, extracted with 450ml of phenylethanol solution with a volume ratio of 2:1 at 90°C for 6hrs, air-dried, transferred into a 600ml beaker, and added with 400ml of distilled water , 4.5g of sodium chlorite and 4ml of glacial acetic acid, mix well, heat to 75°C, and stir for 1hr. Then, 4ml of glacial acetic acid and 4.5g of sodium chlorite were added and heated in a magnetic heating stirrer at 75° C. for 1 hr, and this was repeated 5 times to remove lignin. The above mixture was incompletely filtered and washed with water until neutral to obtain a cellulose suspension. Dissolve 10g of potassium hydroxide into the above-mentioned cellulose suspension, raise the temperature to 90°C, keep it for 2hrs, filter and wash with water until neutral, and obtain a purified cellulose suspension. The above-mentioned purified cellulose suspension was ground 15 times at ...

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

No PUM Login to view more

Abstract

The invention discloses a biology-base carbon nanofiber loaded cobalt ferrite wave-absorbing material which is formed by biology-base carbon nanofibers absorbing cobalt ferrite and further discloses a preparation method of the biology-base carbon nanofiber loaded cobalt ferrite wave-absorbing material. The method includes the steps that biology-base nanofiber suspension liquid is heated and carbonized and then the biology-base carbon nanofibers are obtained; afterwards, the biology-base carbon nanofibers, iron nitrate nonahydrate and cobalt nitrate hexahydrate are mixed evenly, and then an ethylene glycol-sodium hydroxide solution is added for reacting so that a finished product can be obtained. According to the method, the biology-base nanofibers are used as the precursor, and the biology-base carbon nanofiber loaded cobalt ferrite wave-absorbing material is prepared through a solvothermal method. A system for organically combining the two wave-absorbing media of different properties of the biology-base carbon nanofibers and the cobalt ferrite is established, the electric conductivity of the cobalt ferrite is enhanced through the net-shaped structure of the carbon nanofibers, agglomeration increase of cobalt ferrite particles is prevented, and the wave-absorbing property of pure cobalt ferrite can be improved obviously.

Description

technical field [0001] The invention relates to a bio-based carbon nanofiber loaded cobalt ferrite wave-absorbing material and a preparation method thereof, belonging to the field of materials. Background technique [0002] With the rapid development of nanotechnology, the extraction of high aspect ratio cellulose nanofibrils from biomass materials has become a research hotspot in the field of nanocellulose science. The development of functional composite materials with high added value based on biomass nanocellulose has become a research hotspot in the field of biomaterials and nanocarbon materials. [0003] Among many conductive filler materials, carbon fiber can be used as an excellent shielding material due to its good conductivity and unique network structure. Compared with traditional carbon-filled materials, nanoscale fillers such as carbon nanofibers, carbon nanotubes, and carbon nanowires have more excellent structural and electrical properties. [0004] In recent...

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
IPC IPC(8): C09K3/00
Inventor 徐长妍赵雨晴姬安石小梅施礼纳成国精刘福臣
Owner 杭州治木科技有限公司
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