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Preparation method for growing TiO2NWs on surfaces of carbon fibers in supercritical water

A technology of surface growth and supercritical water, which is applied in the fields of carbon fiber, fiber treatment, textiles and papermaking, etc., can solve the problems of damage to the strength of carbon fiber body, cumbersome operation, and difficult implementation, so as to achieve strength without damage, environmental pollution, and easy The effect of implementation

Active Publication Date: 2015-07-22
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the existing problems that growing nanowires on the surface of carbon fibers requires a high temperature environment, which seriously damages the body strength of carbon fibers and is difficult to implement, and provides a method for growing TiO on the surface of carbon fibers in supercritical water. 2 Preparation method of NWs

Method used

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  • Preparation method for growing TiO2NWs on surfaces of carbon fibers in supercritical water
  • Preparation method for growing TiO2NWs on surfaces of carbon fibers in supercritical water
  • Preparation method for growing TiO2NWs on surfaces of carbon fibers in supercritical water

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specific Embodiment approach 1

[0054] Specific implementation mode 1: This implementation mode is a method of growing TiO on the surface of carbon fibers in supercritical water. 2 The preparation method of NWs is accomplished according to the following steps:

[0055] 1. Preparation of TiO 2 Sol: Add tetrabutyl titanate to absolute ethanol, then add diethanolamine, and stir at a stirring speed of 5r / min~10r / min for 0.5h~2h to obtain reaction solution A; the mass fraction is 1% ~2% polyethylene glycol aqueous solution was added dropwise to the reaction solution A at a rate of 1 drop / min~3 drops / min, and then stirred at a stirring speed of 5r / min~10r / min for 5h~10h to obtain a transparent TiO 2 Sol;

[0056] The volume ratio of absolute ethanol and tetrabutyl titanate described in step 1 is (1.25~10):1;

[0057] The volume ratio of absolute ethanol described in step 1 to diethanolamine is (6~60):1;

[0058] The mass fraction of the polyethylene glycol described in step 1 is 1%-2%, and the volume ratio of...

specific Embodiment approach 2

[0092] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the volume ratio of absolute ethanol to tetrabutyl titanate in step 1 is (1.25-5):1. Other steps are the same as in the first embodiment.

specific Embodiment approach 3

[0093] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the volume ratio of absolute ethanol to tetrabutyl titanate in Step 1 is (5-10):1. Other steps are the same as those in Embodiment 1 or 2.

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Abstract

The invention provides a preparation method for growing TiO2NWs on surfaces of carbon fibers in supercritical water, relates to the method of carbon fiber modification and aims at solving the problems in the prior art that the body strength of carbon fibers is seriously damaged since the growth of nano wires on the surfaces of fibers needs a high-temperature environment, and moreover the operation is complicated and the implementation is not easy. The method comprises the following steps: 1, preparing TiO2 sol; step 2, extracting the carbon fibers; 3, carrying out oxidization treatment on the carbon fibers; 4, preparing a TiO2 thin film on the carbon fiber surfaces; and step 5, growing the TiO2NWs on the surfaces of the carbon fibers by using a supercritical hydrothermal method to obtain the carbon fibers with the TiO2NWs growing on the surfaces. The interface shearing strength of the prepared carbon fibers with the TiO2NWs growing on the surfaces is 96.0MPa-104MPa. The preparation method for growing the TiO2NWs on the surfaces of the carbon fibers in the supercritical water is provided.

Description

technical field [0001] The invention relates to a method for modifying carbon fibers. Background technique [0002] Carbon fiber reinforced resin matrix composites have been widely used in aerospace, automobile, shipbuilding, petroleum, chemical and other industries due to their light weight, high specific strength and high specific rigidity. However, the surface of carbon fiber is inert and has few active functional groups, resulting in poor interfacial adhesion with the matrix, which greatly affects the overall mechanical properties of the composite material and limits its application range. Reinforcement materials composed of micron-scale traditional carbon fibers and nanoscale nanowires-nanowire / carbon fiber multi-scale reinforcement can significantly improve the interfacial properties of composite materials, thereby improving the overall performance of composite materials, so it has become a research topic in recent years. hotspot. [0003] The commonly used methods o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M11/46D06M101/40
Inventor 孟令辉马丽春黄玉东
Owner HARBIN INST OF TECH
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