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A kind of reinforcing agent for carbon fiber sizing agent and preparation method thereof

A technology of reinforcing agent and carbon fiber, applied in the direction of carbon fiber, fiber type, fiber treatment, etc., can solve the problems of unstable composition and poor compatibility, and achieve the effect of simple preparation method, high thermal stability and simple operation.

Active Publication Date: 2020-07-28
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of the above analysis, the present invention aims to provide a reinforcing agent for carbon fiber sizing agent and its preparation method, which solves the problems of unstable components and poor compatibility of reinforcing agents in the prior art

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  • A kind of reinforcing agent for carbon fiber sizing agent and preparation method thereof
  • A kind of reinforcing agent for carbon fiber sizing agent and preparation method thereof
  • A kind of reinforcing agent for carbon fiber sizing agent and preparation method thereof

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preparation example Construction

[0037] The present invention also provides a method for preparing a reinforcing agent for carbon fiber sizing agent, which is a polyacrylic acid formed by in-situ polymerization of acrylic acid on the surface of effectively stripped nanosheet boron nitride through an ammonium persulfate initiator The modified nano-sheet boron nitride comprises the following steps: weighing a certain amount of polyacrylic acid-modified nano-sheet boron nitride dispersion liquid according to the proportion and mixing it with a dispersant, silicone oil and higher fatty acid at 30°C to 90°C (for example, 50 ℃~80℃), and ultrasonically disperse for 1h~6h.

[0038] Compared with the prior art, the beneficial effect of the method for preparing a reinforcing agent for carbon fiber sizing agent provided by the present invention is basically the same as that of the above-mentioned reinforcing agent for carbon fiber sizing agent, and will not be repeated here.

[0039] In addition, the choice of mixing te...

Embodiment 1

[0047] This embodiment provides a polyacrylic acid modified nanosheet boron nitride-based reinforcing agent for carbon fiber sizing agent and its preparation method, wherein the preparation method includes the following steps:

[0048] Step 1: Prepare an aqueous solution of isopropanol, wherein the volume percentage of isopropanol is 30%, boron nitride with an average crystallite size of 50 microns, the concentration of boron nitride is 10 mg / mL, and the dispersion liquid after mixing is 100 grams in total ;

[0049] Step 2: Ultrasonicize the dispersion obtained in Step 1, the ultrasonic power is 50W, and the ultrasonic time is 1 hour; after the ultrasonication is completed, let it stand for 4 hours; then centrifuge at 4000rpm to obtain the upper dispersion;

[0050] Step 3: Modify the dispersion liquid obtained in step 2: add acrylic acid and ammonium persulfate (the mass ratio of acrylic acid, ammonium persulfate, and boron nitride is 10:1:1) at 40°C, and react to obtain mod...

Embodiment 2

[0055] This embodiment provides a polyacrylic acid modified nanosheet boron nitride-based reinforcing agent for carbon fiber sizing agent and its preparation method, wherein the preparation method includes the following steps:

[0056] Step 1: Prepare a mixed solution of water and isopropanol, wherein the volume ratio of isopropanol is 50%, then add boron nitride with an average crystallite size of 50 microns, the concentration of boron nitride is 10mg / mL, mix and disperse 100 grams in total;

[0057] Step 2: ultrasonically treat the dispersion liquid obtained in step 1, the ultrasonic power is 100W, and the ultrasonic time is 8 hours; after the ultrasonic wave is completed, let it stand for 4 hours; then centrifuge at 6000rpm to obtain the upper dispersion liquid;

[0058] Step 3: Modify the dispersion liquid obtained in step 2: add acrylic acid and ammonium persulfate at 60°C (the mass ratio of acrylic acid, ammonium persulfate, and boron nitride is 15:3:5), and react to obt...

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Abstract

The invention discloses a strengthening agent for carbon fiber sizing agents and a preparation method of the strengthening agent, belongs to the technical field of composite materials, and solves theproblems of instable component and poor compatibility of a strengthening agent in the prior art. The strengthening agent comprises polyacrylic acid modified nano-lamella boron nitride dispersion liquid, a dispersing agent, silicone oil and higher fatty acid, nano-lamella boron nitride dispersion liquid is modified by polyacrylic acid to form the polyacrylic acid modified nano-lamella boron nitridedispersion liquid, and a modified mode of the polyacrylic acid includes that acrylic acid is polymerized on the surface of effectively peeled nano-lamella boron nitride in situ. The preparation method includes the steps: mixing the polyacrylic acid modified nano-lamella boron nitride dispersion liquid, the dispersing agent, the silicone oil and the higher fatty acid; ultrasonically dispersing mixture to obtain the strengthening agent for the carbon fiber sizing agents. The strengthening agent and the preparation method can be used for strengthening the carbon fiber sizing agents.

Description

technical field [0001] The invention relates to the technical field of composite materials, in particular to a reinforcing agent for a carbon fiber sizing agent and a preparation method thereof. Background technique [0002] Carbon fiber has a series of excellent properties such as high specific strength and high specific modulus, and is widely used in various fields. However, carbon fiber is brittle. The existence of silk is not conducive to the infiltration of resin on carbon fiber, which reduces its strength. The above problems can be solved by sizing. With the continuous improvement of performance requirements of carbon fiber composite materials, people pay more and more attention to the functional research of sizing agent. [0003] However, at present, the common reinforcing agents used in carbon fiber sizing agents have the problems of unstable components and poor compatibility, which greatly affects the improvement of the comprehensive performance (especially the resi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06M11/80D06M15/263D06M15/643D06M13/188D06M101/40
CPCD06M11/80D06M13/188D06M15/263D06M15/643D06M2101/40D06M2200/40
Inventor 杨旭叶明新沈剑锋李娜
Owner FUDAN UNIV
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