Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Composite material based on lignocellulose and bacterial cellulose as well as preparation method and application of composite material

A technology of bacterial cellulose and lignocellulose, applied in shielding materials, chemical instruments and methods, other chemical processes, etc., can solve the problems of poor corrosion resistance and high density of metal materials

Active Publication Date: 2021-04-09
NANJING FORESTRY UNIV
View PDF11 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional absorbing materials are mainly metals, but the shortcomings of metal materials such as high density and poor corrosion resistance limit their application in the field of electromagnetic protection

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
  • Composite material based on lignocellulose and bacterial cellulose as well as preparation method and application of composite material
  • Composite material based on lignocellulose and bacterial cellulose as well as preparation method and application of composite material
  • Composite material based on lignocellulose and bacterial cellulose as well as preparation method and application of composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The preparation method of the composite material based on lignocellulose and bacterial cellulose, the specific steps are as follows:

[0030] 1) Add 0.5mol sodium chlorite and 20mL glacial acetic acid to 1000mL deionized water to obtain a mixed solution, pour it into a container of balsa wood (60*60*2mm 3 ) reaction tank, heated to boiling, and kept warm for 3 hours, during which the mixed solution was replaced 4 times; cooled, washed repeatedly with ethanol and deionized water, and freeze-dried to obtain delignified balsa wood chips; the vacuum degree of the freeze dryer was less than 10Pa, and the cold trap The temperature is lower than -80°C, and the drying time is longer than 24 hours; the cross-sectional direction of the balsa wood chips is the cross-section;

[0031] 2) Sterilize the delignified balsa wood chips in an autoclave to obtain sterilized delignified balsa wood chips; the sterilization temperature is 121° C., the time is 20 minutes, and the pressure is l...

Embodiment 2

[0041] The preparation method of the composite material based on lignocellulose and bacterial cellulose, the specific steps are as follows:

[0042] 1) Add 0.5mol sodium chlorite and 20mL glacial acetic acid to 1000mL deionized water to obtain a mixed solution, pour it into a container of balsa wood (60*60*2mm 3 ) reaction tank, heated to boiling, and kept warm for 3 hours, during which the mixed solution was replaced 4 times; cooled, washed repeatedly with ethanol and deionized water, and freeze-dried to obtain delignified balsa wood chips; the vacuum degree of the freeze dryer was less than 10Pa, and the cold trap The temperature is lower than -80°C, and the drying time is longer than 24 hours; the cross-sectional direction of the balsa wood chips is the cross-section;

[0043] 2) Sterilize the delignified balsa wood chips in an autoclave to obtain sterilized delignified balsa wood chips; the sterilization temperature is 121° C., the time is 20 minutes, and the pressure is l...

Embodiment 3

[0053] The preparation method of the composite material based on lignocellulose and bacterial cellulose, the specific steps are as follows:

[0054] 1) Add 0.5mol sodium chlorite and 20mL glacial acetic acid to 1000mL deionized water to obtain a mixed solution, pour it into a container of balsa wood (60*60*2mm 3 ) reaction tank, heated to boiling, and kept warm for 3 hours, during which the mixed solution was replaced 4 times; cooled, washed repeatedly with ethanol and deionized water, and freeze-dried to obtain delignified balsa wood chips; the vacuum degree of the freeze dryer was less than 10Pa, and the cold trap The temperature is lower than -80°C, and the drying time is longer than 24 hours; the cross-sectional direction of the balsa wood chips is the cross-section;

[0055] 2) Sterilize the delignified balsa wood chips in an autoclave to obtain sterilized delignified balsa wood chips; the sterilization temperature is 121° C., the time is 20 minutes, and the pressure is l...

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 composite material based on lignocellulose and bacterial cellulose as well as a preparation method and application of the composite material, and belongs to the technical field of biomass cellulose materials. The method comprises the steps of adding wood chips into a mixed solution of sodium chlorite and glacial acetic acid for pretreatment, and performing sterilization treatment to obtain sterilized delignified wood chips; preliminarily forming a bacterial cellulose film by adopting static culture, paving the sterilized delignified wood chips on the surface of the preliminarily formed bacterial cellulose film, and continuing standing fermentation culture to obtain a lignocellulose-bacterial cellulose composite material; and carbonizing at high temperature to obtain a carbon fiber composite material. The raw materials used in the preparation method are all from natural renewable biomass materials, so that the preparation method has the characteristics of low raw material cost, simple technical method and the like; and complementation of the plant fibers and the bacterial fibers in spatial orientation is achieved, and the material has high electromagnetic wave absorption capacity.

Description

technical field [0001] The invention belongs to the technical field of biomass cellulose materials, and in particular relates to a composite material based on lignocellulose and bacterial cellulose and its preparation method and application. Background technique [0002] The wave-absorbing composite material is a functional material with both load-carrying and wave-absorbing properties. It can convert the incident electromagnetic wave into heat energy and other energy forms to the greatest extent and dissipate it eventually, avoiding environmental pollution caused by secondary reflection. Traditional absorbing materials are mainly metals, but the shortcomings of metal materials such as high density and poor corrosion resistance limit their application in the field of electromagnetic protection. Therefore, finding absorbing materials with thin thickness, light weight, wide frequency band and good thermal stability has become the research focus of current researchers. At pres...

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): C04B35/83C04B35/52C08L1/02C09K3/00H05K9/00
CPCC04B35/83C04B35/52C08L1/02C09K3/00H05K9/009C08L2205/025
Inventor 黄洋尹纱肖惠宁胡辰尧
Owner NANJING FORESTRY UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com