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

Method for rapidly testing moisture content of sized and dried carbon fibers

A technology of moisture content after drying, which is applied in the field of detection to achieve the effect of avoiding quality errors and fast testing speed

Pending Publication Date: 2022-03-01
辽宁诺科碳材料有限公司
View PDF4 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the shortcomings of the existing detection methods, the present invention provides a method for quickly testing the moisture content of carbon fibers after sizing and drying

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
  • Method for rapidly testing moisture content of sized and dried carbon fibers
  • Method for rapidly testing moisture content of sized and dried carbon fibers
  • Method for rapidly testing moisture content of sized and dried carbon fibers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] Take about 5g of fiber sample A after sizing and drying and weigh it with a balance with a precision of 0.01mg. The accurate mass is 5.03281g. After 7 minutes, take out the fiber from the acetone solvent. During the process of taking out the fiber, squeeze the acetone solvent attached to the fiber back into the glass container so that the solvent attached to the fiber does not appear in the form of droplets. Then use the precision scale that comes with the airtight container to quickly read the remaining solvent volume as 141.2ml, accurately sample 1ml from the remaining acetone solvent, and quickly test the water content in this 1ml acetone solvent with a Karl Fischer trace moisture analyzer. 10.2μg / ml . At the same time, TGA is used to determine whether there is sizing agent residue on the above-mentioned fibers after soaking and desizing. The TGA test condition is: nitrogen atmosphere, and the temperature is raised from 50°C to 500°C at a heating rate of 30°C / min. T...

Embodiment 2

[0057] Take about 5g of fiber sample B after sizing and drying and weigh it with a balance with a precision of 0.01mg. The accurate mass is 5.12831g. After 5 minutes, take out the fiber from the acetone solvent. During the process of taking out the fiber, squeeze the acetone solvent attached to the fiber back into the glass container so that the solvent attached to the fiber does not appear in the form of droplets. Then use the precision scale that comes with the airtight container to quickly read the remaining solvent volume as 170.8ml, accurately sample 1ml from the remaining acetone solvent, and quickly test the water content in this 1ml acetone solvent with a Karl Fischer trace moisture analyzer to be 10.8μg / ml . At the same time, TGA is used to determine whether there is sizing agent residue on the above-mentioned fibers after soaking and desizing. The TGA test condition is: nitrogen atmosphere, and the temperature is raised from 50°C to 500°C at a heating rate of 50°C / min ...

Embodiment 3

[0059] Take about 5g of fiber sample C after sizing and drying and weigh it with a balance with a precision of 0.01mg. The accurate mass is 5.19228g. After 5 minutes, take out the fiber from the acetone solvent. During the process of taking out the fiber, squeeze the acetone solvent attached to the fiber back into the glass container so that the solvent attached to the fiber does not appear in the form of droplets. Then use the precision scale that comes with the airtight container to quickly read the remaining solvent volume as 191.3ml, accurately sample 1ml from the remaining acetone solvent, and quickly test the water content in this 1ml acetone solvent with a Karl Fischer trace moisture analyzer to be 11.5μg / ml . At the same time, TGA is used to determine whether there is sizing agent residue on the above-mentioned fibers after soaking and desizing. The TGA test condition is: nitrogen atmosphere, and the temperature is raised from 50°C to 500°C at a heating rate of 50°C / mi...

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 belongs to the technical field of detection methods, and particularly relates to a method for rapidly testing the moisture content of sized and dried carbon fibers. According to the method, the final moisture content of the fiber is comprehensively judged by adopting solvent digestion in combination with a trace moisture testing method and a thermal weight loss step. The method is high in testing speed, and overcomes the difficulties of long testing time and high testing environment requirements of a drying method for testing the moisture content of the fiber; by adopting the method, the total mass of the original fiber sample only needs to be tested once, and the subsequent mass test is not involved, so that the mass error caused by the fact that the fiber is light, crisp and easy to drift out of an experimental container in the experimental process can be avoided.

Description

technical field [0001] The invention belongs to the technical field of detection methods, and in particular relates to a method for rapidly testing the moisture content of carbon fibers after sizing and drying. [0002] technical background [0003] Carbon fiber has performance characteristics such as high specific strength and high specific modulus, and is widely used in aerospace, automotive lightweight, thermal management and other fields. The moisture content of carbon fiber has a great influence on the storage stability of carbon fiber and the performance of subsequent composite materials. The drying method is generally used to test the moisture content of carbon fiber, that is, the carbon fiber is dried in a hot air circulation oven at a certain temperature, and the moisture content of the carbon fiber is calculated according to the quality difference before and after drying. This method is generally used in the moisture content test. The national standard recommended m...

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 Applications(China)
IPC IPC(8): G01N31/16G01N25/20G01N5/00
CPCG01N31/168G01N5/00G01N25/20Y02P70/62
Inventor 姚远杜文超于杰
Owner 辽宁诺科碳材料有限公司
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