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Treatment method and device for strengthening interface of PI coated optical fiber and epoxy resin

An epoxy resin and processing method technology, which is applied in the field of optical fiber intelligent composite material manufacturing, can solve the problems affecting the detection accuracy and sensitivity of optical fiber sensors, weak interface bonding strength, and reduced composite material structural strength, etc., so as to improve detection life and detection. Accuracy, reduce the effect of mechanical properties, enhance the effect of polyimide surface

Inactive Publication Date: 2014-08-20
XI AN JIAOTONG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the interface bonding strength between the optical fiber and epoxy resin is relatively weak after the optical fiber is implanted into the epoxy resin-based composite material.
Due to the hydrophobicity of polyimide coated optical fiber, its bonding strength with epoxy resin is low. On the one hand, it will reduce the overall structural strength of the composite material and affect the service life of the smart composite material structure itself; On the one hand, it will affect the detection accuracy and sensitivity of the optical fiber sensor to strain. The weak interface will be destroyed after the composite material is subjected to a certain strain load, so that the optical fiber and the matrix resin of the composite material will be separated. The strain value detected by the optical fiber sensor is consistent with that of the composite material. The strain value itself will produce deviations, which will affect the detection accuracy of the fiber optic sensor

Method used

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  • Treatment method and device for strengthening interface of PI coated optical fiber and epoxy resin

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The processing method of strengthening PI coated optical fiber and epoxy resin interface, comprises the following steps:

[0030] 1) Soak the polyimide-coated optical fiber in the pentaethylene hexamine solution with a concentration of 10g / L and a temperature of 40°C for 30min, and at the same time use a vibration frequency of 25KHz and a power density of 0.4W / cm 2 An ultrasonic vibrating rod stirs the pentaethylene hexamine solution, wherein the solvent of the pentaethylene hexamine solution is a mixed solution of isopropanol and deionized water with a mass ratio of 1:5;

[0031] 2) The polyimide-coated optical fiber treated in step 1) was heated and dried under an infrared lamp with a power of 80 W for 70 minutes, wherein the heating temperature was 100° C., that is, the surface treatment of the polyimide-coated optical fiber was completed.

[0032] Implantation of the treated polyimide-coated optical fiber into the epoxy-based composite improves the performance of th...

Embodiment 2

[0034]The processing method of strengthening PI coated optical fiber and epoxy resin interface, comprises the following steps:

[0035] 1) Soak the polyimide-coated optical fiber in the pentaethylene hexamine solution with a concentration of 30g / L and a temperature of 30°C for 15min, and at the same time use a vibration frequency of 40KHz and a power density of 0.6W / cm 2 An ultrasonic vibrating rod stirs the pentaethylene hexamine solution, wherein the solvent of the pentaethylene hexamine solution is a mixed solution of isopropanol and deionized water with a mass ratio of 1:4;

[0036] 2) The polyimide-coated optical fiber treated in step 1) was heated and dried under an infrared lamp with a power of 125W for 50 minutes, wherein the heating temperature was 120° C., that is, the surface treatment of the polyimide-coated optical fiber was completed.

[0037] Implantation of the treated polyimide-coated optical fiber into the epoxy-based composite improves the performance of the...

Embodiment 3

[0039] The processing method of strengthening PI coated optical fiber and epoxy resin interface, comprises the following steps:

[0040] 1) Soak the polyimide-coated optical fiber in the pentaethylene hexamine solution with a concentration of 20g / L and a temperature of 35°C for 20min, and at the same time use a vibration frequency of 30KHz and a power density of 0.5W / cm 2 An ultrasonic vibrating rod stirs the pentaethylene hexamine solution, wherein the solvent of the pentaethylene hexamine solution is a mixed solution of isopropanol and deionized water with a mass ratio of 1:6;

[0041] 2) The polyimide-coated optical fiber treated in step 1) was heated and dried under an infrared lamp with a power of 90 W for 60 minutes, wherein the heating temperature was 110° C., that is, the surface treatment of the polyimide-coated optical fiber was completed.

[0042] Implantation of the treated polyimide-coated optical fiber into the epoxy-based composite improves the performance of th...

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Abstract

The invention discloses a treatment method and device for strengthening an interface of a PI coated optical fiber and epoxy resin. The treatment method comprises the following steps: firstly, carrying out ultrasonic treatment on the PI coated optical fiber in a pentaethylenehexamine solution; then heating and drying under an infrared lamp so as to finish surface treatment to the PI coated optical fiber. The treatment device comprises a plurality of rolling wheels used for transmitting and guiding the PI coated optical fiber, and a water bath heating box and the infrared lamp which are sequentially arranged along a transmitting direction of the PI coated optical fiber, wherein the pentaethylenehexamine solution is contained in the water bath heating box; an ultrasonic vibration rod is arranged in the water bath heating box. According to the treatment method disclosed by the invention, the strength of the interface of the PI coated optical fiber and the epoxy resin is enhanced, so that the influence to the mechanical property of a composite material, which is caused by the embedding of optical fibers, is decreased; the detection life and the detection precision of an optical fiber sensor embedded with the composite material are prolonged and improved.

Description

technical field [0001] The invention belongs to the field of optical fiber intelligent composite material manufacturing, and in particular relates to a treatment method and device for strengthening the interface between PI coated optical fiber and epoxy resin. Background technique [0002] Optical fiber smart composite material is a kind of smart composite material that has been studied more at home and abroad at present. Implanting optical fiber sensors into the composite material constitutes a simple smart composite material. When the composite material plate is subjected to external force, the composite material plate will be deformed, and the fiber optic sensor embedded in the composite material will be deformed accordingly, causing changes in the fiber optic signal. These signal changes directly reflect the internal state of the material. By processing the signal, the damage and strain state inside the material can be obtained, so that corresponding adjustments can be m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/06C08L63/00
Inventor 段玉岗李金键王奔高侃
Owner XI AN JIAOTONG UNIV