Method for improving surface activity of aramid fiber

A technology of aramid fiber and surface activity, which is applied in fiber treatment, fiber type, textile and paper making, etc. It can solve the problems of many processing steps, harsh processing conditions, and complicated process, so as to improve the interface bonding strength and facilitate continuous processing , the effect of simple processing method

Inactive Publication Date: 2013-04-10
SHANDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The above method has the following defects: complex process, many processing steps, some processing conditions are harsh, many equipments are required for reaction, large investment cost, and industrialization is difficult
At present, there is no ideal method for improving the surface activity of aramid fibers in the prior art.

Method used

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  • Method for improving surface activity of aramid fiber
  • Method for improving surface activity of aramid fiber
  • Method for improving surface activity of aramid fiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Embodiment 1 A kind of method that improves aramid fiber surface activity

[0030] Proceed as follows:

[0031] (1) Surface pretreatment of aramid fibers:

[0032] Immerse the aramid fibers in acetone and heat and boil for 1 hour, then immerse in absolute ethanol and heat and boil for 1 hour; then place the aramid fibers in deionized water for washing to remove the surface treatment agent during fiber processing, and the treatment is complete Finally, dry the aramid fiber in an electric heating constant temperature blast drying oven (the temperature is controlled between 100°C and 120°C, the same below) for 2 hours;

[0033] (2) Surface activation treatment of aramid fibers:

[0034] ① Prepare a hydrogen peroxide solution with a concentration of 40%;

[0035] ② Cut the pretreated aramid fiber into a sample of 20cm±2cm, place it in the hydrogen peroxide solution prepared above, and treat it at 40°C for 60min;

[0036] ③ Washing the above-mentioned activated aramid fi...

Embodiment 2

[0047] Embodiment 2 A kind of method that improves aramid fiber surface activity

[0048] Proceed as follows:

[0049] (1) Surface pretreatment of aramid fibers:

[0050] Immerse the aramid fibers in acetone and heat and boil for 1 hour, then immerse in absolute ethanol and heat and boil for 1 hour; then place the aramid fibers in deionized water for washing to remove the surface treatment agent during fiber processing, and the treatment is complete Finally, the aramid fiber was dried in an electric heating constant temperature blast drying oven for 1.5 hours;

[0051] (2) Surface activation treatment of aramid fibers:

[0052] ① Prepare a hydrogen peroxide solution with a concentration of 60%;

[0053] ②Cut the pretreated aramid fibers into 20cm±2cm samples, place them in the hydrogen peroxide solution prepared above, and treat them at 0°C for 90 minutes;

[0054] ③ Washing the above-mentioned activated aramid fiber with deionized water until the pH value of the washing s...

Embodiment 3

[0056] Embodiment 3 A kind of method that improves aramid fiber surface activity

[0057] Proceed as follows:

[0058] (1) Surface pretreatment of aramid fibers:

[0059] Immerse the aramid fibers in acetone and heat and boil for 1 hour, then immerse in absolute ethanol and heat and boil for 1 hour; then place the aramid fibers in deionized water for washing to remove the surface treatment agent during fiber processing, and the treatment is complete Finally, the aramid fiber was dried for 2.5 hours in an electric heating constant temperature blast drying oven;

[0060] (2) Surface activation treatment of aramid fibers:

[0061] ① Prepare a hydrogen peroxide solution with a concentration of 20%;

[0062] ② Cut the pretreated aramid fiber into a sample of 20cm±2cm, place it in the hydrogen peroxide solution prepared above, and treat it at 80°C for 30min;

[0063] ③ Washing the above-mentioned activated aramid fiber with deionized water until the pH value of the washing solut...

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Abstract

The invention discloses a method for improving the surface activity of aramid fiber. The method comprises the following steps of: (1) immersing the aramid fiber in acetone, heating and boiling for 1 hour, further immersing into anhydrous ethanol, and heating and boiling for 1 hour; and then placing into deionized water for washing, and drying for 2 hours after the treatment; and (2) performing surface activation treatment on the aramid fiber: (a) preparing a hydrogen peroxide solution with the concentration of 20%-60%; (b) cutting the aramid fiber after pretreatment into samples of 20cm, and placing into the hydrogen peroxide solution for performing treatment at the temperature of 0 DEG C-80 DEG C for 30min-90min; (c) washing with the deionized water till the pH value of a washing solution is 7; and (d) drying after washing to obtain the aramid fiber with surface modification. The treatment method disclosed by the invention is simple, the interfacial binding strength of an aramid fiber-reinforced composite material can be greatly improved, the mechanical strength of the aramid fiber can be also kept unchanged, the equipment is simple, the operation is convenient, and the industrial continuous treatment is convenient to realize.

Description

technical field [0001] The invention provides a method for improving the surface activity of aramid fibers. Background technique [0002] Aramid fiber is a rigid macromolecule with high degree of orientation and high crystallinity, high molecular symmetry, and weak lateral intermolecular force; in addition, due to the presence of a large number of aromatic rings in the molecule, the hydrogen bond between the molecules is weakened, The low transverse strength makes it easy to break under the action of compression and shear force. This structural feature makes the surface of aramid fibers relatively inert and has low reactivity, resulting in poor interfacial adhesion between aramid fibers and substrates such as resins. In order to make better use of the excellent mechanical properties of aramid fibers and improve the interfacial bonding of aramid fiber reinforced composites, it is necessary to modify the surface of aramid fibers. [0003] At present, the surface modification...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M11/50D06M13/127D06M13/144D06M101/36
Inventor 贾曌
Owner SHANDONG UNIV OF TECH
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