ZnO nanosheet grown carbon fiber cloth reinforced polyhexahydrotriazine composite material, preparation method and recovery method

A technology of polyhexahydrotriazine and carbon fiber cloth, which is applied in the fields of carbon fiber, plastic recycling, fiber processing, etc., can solve the problems of unrealistic industrial production, poor wear resistance, complicated preparation process, etc., and achieve simple and easy parameter adjustment , The preparation method is simple and easy, and the effect of expanding the application range and prospect

Active Publication Date: 2021-06-01
SHAANXI UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The composite material obtained by this method has excellent mechanical and heat resistance properties, but the wear resistance is not good, and there is also the problem that the preparation process is relatively complicated, and industrial production cannot be realized.

Method used

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  • ZnO nanosheet grown carbon fiber cloth reinforced polyhexahydrotriazine composite material, preparation method and recovery method
  • ZnO nanosheet grown carbon fiber cloth reinforced polyhexahydrotriazine composite material, preparation method and recovery method
  • ZnO nanosheet grown carbon fiber cloth reinforced polyhexahydrotriazine composite material, preparation method and recovery method

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preparation example Construction

[0026] The invention provides a method for preparing a polyhexahydrotriazine composite material reinforced by growing ZnO nanosheet carbon fiber cloth, comprising the following steps:

[0027] Step 1: Electroplating the carbon fiber cloth, covering the surface of the carbon fiber cloth with zinc to obtain Zn@CFC; the preparation of the electroplating solution is ZnCl 2 , KCl, H 3 BO 3 and C 7 h 5 NO 3 Add S into deionized water, use a magnetic stirrer to stir at room temperature for 25 to 40 minutes, fully stir and disperse evenly, and ZnCl in the electroplating solution 2 The concentration of KCl is 50-70g / L, the concentration of KCl is 180-240g / L, the concentration of H 3 BO 3 The concentration is 15~20ml / L, C 7 h 5 NO 3 The concentration of S is 0.3 ~ 0.5g / L; the carbon fiber cloth is pretreated before electroplating treatment. The pretreatment is: put the commercial carbon fiber weave into the mixed solution of absolute ethanol and acetone for ultrasonic cleaning,...

Embodiment 1

[0037] 1) Coating zinc on the surface of CF by electroplating process at room temperature: electroplating time is 5min, current intensity is 4.5A, voltage is 4.0V, Zn@CFC material is obtained, and cleaned with distilled water;

[0038] 2) Covering ZnO nanosheets on the CF surface by oxidation: ZnO@CFC material was synthesized by oxidizing Zn@CFC material at 80°C for 3 hours and cooling to room temperature naturally;

[0039] 3) Preparation of PHT prepolymer solution: 600 μL of formaldehyde, 15 mL of N-methylpyrrolidone and 2 g of 4,4’-diaminodiphenyl ether were stirred at 50 ° C for 30 minutes;

[0040] 4) Cover PHT on ZnO@CFC by solution impregnation method: dry the ZnO@CFC soaked in PHT for 5-10 minutes, repeat at least 5 times until the thickness of the sample reaches 0.35-0.55mm, and then, the obtained pre- The polymer composite material is further cured at 180-200° C. for 2 hours to obtain a two-dimensional ZnO nanosheet and CF-reinforced polyhexahydrotriazine composite m...

Embodiment 2

[0043] Using the same method as in Example 1, the difference is that the prepared PHT prepolymer solution uses 650 μL of formaldehyde, 16 mL of N-methylpyrrolidone and 3 g of 4,4'-diaminodiphenyl ether at 50 ° C Stir the resultant for 30 minutes.

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Abstract

The invention discloses a ZnO nanosheet grown carbon fiber cloth reinforced polyhexahydrotriazine composite material, a preparation method and a recovery method. According to the preparation method, ZnO nanosheets and polyhexahydrotriazine are loaded on the surface of carbon fiber woven cloth through electroplating, oxidation and solution impregnation methods, the interfacial strength between the carbon fiber woven cloth and the polyhexahydrotriazine is improved, and the friction performance of the composite material is further improved. In addition, a polyhexahydrotriazine prepolymer solution comprises formaldehyde, N-methyl pyrrolidone and 4, 4'-diaminodiphenyl ether, and degradable polyhexahydrotriazine thermosetting resin and a novel recoverable thermosetting resin composite material are formed. In the recovery method, a depolymerization solution comprises tetrahydrofuran and hydrochloric acid, and the complete carbon fiber cloth can be recovered after the carbon fiber cloth is soaked in the depolymerization solution, such that the non-destructive recovery of the carbon fiber cloth is achieved, the method is low in cost and environment-friendly, and the industrial application range and prospect of the carbon fibers and the composite material thereof are expanded.

Description

technical field [0001] The invention belongs to the field of preparation of nanocomposite materials, and in particular relates to a polyhexahydrotriazine composite material reinforced by growing ZnO nanosheet carbon fiber cloth, a preparation method and a recovery method. Background technique [0002] High performance carbon fiber reinforced polymer composites (CFRP) have specific strength, modulus, dimensional stability and durability. Fiber-reinforced composites are an important class of composite materials composed of reinforcing fibers and matrix resins. However, the interfacial bond between carbon fiber and polymer material is often weak, and it will cause deformation and failure when subjected to external force, which will affect the performance of its composite material. The introduction of nanomaterials between carbon fiber and polymer material can improve the interface strength of composite material. [0003] The related technology discloses a preparation method of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/06C08L61/22C08K9/02C08K7/06D06M11/44C08J11/16C08J11/22D06M101/40
CPCC08J5/06D06M11/44C08J11/16C08J11/22D06M2101/40C08K9/02C08K7/06C08J2361/22Y02W30/62
Inventor 宋浩杰栗小茜蔺哲杨进贾晓华李永王思哲
Owner SHAANXI UNIV OF SCI & TECH
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