Surface-modified aramid fiber and preparation method thereof

An aramid fiber and surface modification technology, applied in the field of organic fibers and their preparation, can solve the problems of large surface inertness and poor UV resistance, and achieve the effects of improving UV resistance, low cost, and improving flame retardant properties

Active Publication Date: 2015-03-11
SUZHOU UNIV
View PDF7 Cites 11 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention aims at solving the problems of poor UV resistance and high surface inertia of ordinary aramid fibers and the deficiencies in improving the flame retardancy of a

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
  • Surface-modified aramid fiber and preparation method thereof
  • Surface-modified aramid fiber and preparation method thereof
  • Surface-modified aramid fiber and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0026] Example one

[0027] 1. Preparation of surface modified aramid fiber

[0028] (1) Take 0.5g of para-aramid fiber (Kevlar-49, diameter 12um, density 1.43g / cm 3 , Produced by DuPont in the United States) were successively immersed in acetone, petroleum ether, and deionized water, and cleaned at reflux for 3 hours; after cleaning, the fiber was taken out and dried at 80°C for 12 hours to obtain clean aramid fiber, denoted as KF . See attached for its infrared spectrum figure 1 , The surface contact angle and free energy are shown in Table 1.

[0029] (2) Dissolve 10.5 g of sodium hydroxide in 120 mL of ethanol with stirring to obtain an ethanol solution of sodium hydroxide; immerse 0.1 g of the KF fiber obtained in step (1) in the ethanol solution of sodium hydroxide, and react under reflux for 5 hours; After the reaction, the fiber was washed with water and dried to obtain a fiber with amino groups on the surface.

[0030] (3) Under the protection of nitrogen atmosphere, tak...

Example Embodiment

[0040] Example two

[0041] 1. Preparation of surface modified aramid fiber

[0042] (1) 10.5g of sodium hydroxide was stirred and dissolved in 120mL of ethanol to obtain an ethanol solution of sodium hydroxide; 0.1g of the clean fiber KF obtained in step (1) of Example 1 was immersed in the ethanol solution of sodium hydroxide, Reflux the reaction for 5 hours; after the reaction, wash with water and dry to obtain fibers with amino groups on the surface.

[0043] (2) Under the protection of nitrogen atmosphere, take 0.1g of aramid fiber with amino groups, 30mL of γ-glycidoxypropyltrimethoxysilane, 150mL of absolute ethanol, and add it to a 250mL three-necked flask at 70℃. Reflux and react for 12 hours to obtain aramid fiber with methoxy group on the surface.

[0044] (3) Add 14.9g of cerium chloride and 1.11g of calcium chloride to 150mL of deionized water to dissolve to obtain a mixed solution of cerium chloride and calcium chloride; add 6g of sodium hydroxide to the mixed solution ...

Example Embodiment

[0050] Example three

[0051] 1. Preparation of surface modified aramid fiber

[0052] (1) 10.5g of sodium hydroxide was stirred and dissolved in 120mL of ethanol to obtain an ethanol solution of sodium hydroxide; 0.1g of the clean fiber KF obtained in step (1) of Example 1 was immersed in the ethanol solution of sodium hydroxide, Reflux the reaction for 5 hours; after the reaction, wash with water and dry to obtain fibers with amino groups on the surface.

[0053] (2) Under the protection of nitrogen atmosphere, take 0.1g of aramid fiber with amino groups, 30mL of γ-glycidoxypropyltrimethoxysilane, 150mL of absolute ethanol, and add it to a 250mL three-necked flask at 70℃. Reflux and react for 12 hours to obtain aramid fiber with methoxy group on the surface.

[0054] (3) Add 14.9g of cerium chloride and 1.11g of calcium chloride to 150mL of deionized water to dissolve to obtain a mixed solution of cerium chloride and calcium chloride; add 6g of sodium hydroxide to the mixed solutio...

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
Diameteraaaaaaaaaa
Densityaaaaaaaaaa
Densityaaaaaaaaaa
Login to view more

Abstract

The invention discloses a surface-modified aramid fiber and a preparation method thereof. The preparation method comprises the following steps: firstly, carrying out amino and carboxyl treatment on the surface of an aramid fiber, then reacting with gamma-glycidoxypropyl trimethoxysilane and obtaining a methoxy fiber; reacting hydroxylated calcium oxide-doped cerium oxide with the methoxy fiber, and obtaining a hydroxylated calcium oxide-doped cerium oxide-coated fiber; putting the aramid fiber of which the surface is coated with the hydroxylated calcium oxide-doped cerium oxide into an alkoxy silane solution, adding deionized water and an organic solvent, washing and drying after the completion of reaction and obtaining the aramid fiber of which the surface is coated with hyper-branched polymer grafting inorganic nano-particles. The hyper-branched polymer grafting inorganic nano-particles disclosed by the invention can endow the aramid fiber with better flame resistance and ultraviolet resistance, and the surface adhesion and the mechanical property of the aramid fiber can be simultaneously improved. The surface-modified aramid fiber also has the characteristics of mild reaction conditions, less damage to the fiber and simple process.

Description

technical field [0001] The invention relates to an organic fiber and a preparation method thereof, in particular to a surface-modified aramid fiber and a preparation method thereof. technical background [0002] Aramid fiber is a shining pearl in today's advanced materials, and its excellent comprehensive performance has attracted a lot of attention since its birth. An important field of its application is the preparation of advanced resin matrix composites. However, the surface inertia and poor UV resistance make it difficult to fully reflect the excellent comprehensive properties of aramid fiber in composite materials; on the other hand, flame retardancy has gradually become one of the performance indicators of high-performance fiber materials, and further improvement of aramid fiber Expanding its application in harsher working environments is still a research topic that needs attention; however, there are few reports on related research and development work so far. Ther...

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): D06M15/643D06M11/44D06M11/45D06M101/36
Inventor 梁国正朱小玲顾嫒娟袁莉
Owner SUZHOU UNIV
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