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Carbon fiber obtained by electrophoretic deposition-electropolymerization combined modification and resin-based composite material thereof

A technology of electrophoretic deposition and electrophoretic deposition method, which is applied in the field of carbon fiber and its resin-based composite materials, can solve the problems that the mechanical properties of composite materials cannot reach the optimal level, graphene oxide is easy to detach from the fiber surface, and the bonding strength is weak. Achieve effects that are conducive to mechanical interlocking and chemical bonding, improve interface performance, and improve surface roughness

Active Publication Date: 2021-02-05
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, studies have found that when graphene oxide is deposited on the fiber surface by electrophoresis, due to the weak bonding strength between graphene oxide and carbon fiber, when the composite material is damaged, graphene oxide is easy to detach from the fiber surface, resulting in composite material The mechanical and mechanical properties are not up to the optimal level
Furthermore, most previous studies only introduced graphene oxide on the fiber surface without post-treatment of electrophoretic deposition

Method used

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  • Carbon fiber obtained by electrophoretic deposition-electropolymerization combined modification and resin-based composite material thereof
  • Carbon fiber obtained by electrophoretic deposition-electropolymerization combined modification and resin-based composite material thereof
  • Carbon fiber obtained by electrophoretic deposition-electropolymerization combined modification and resin-based composite material thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Example 1 Preparation of Electrophoretic Deposition-Electropolymerization Combined Modified Carbon Fiber (EPD / EPI-CF) of the present invention

[0052] according to Figure 14 As shown in the flow chart, on the same continuous production line, using water as the medium, first adopt the electrophoretic deposition method to deposit graphene oxide on the surface of the carbon fiber to obtain the graphene oxide coated carbon fiber, and then use the electropolymerization method to oxidize the obtained carbon fiber. The polymer is generated in situ at the surface interface of the graphene-coated carbon fiber, washed with water and dried. Concrete preparation process is as follows:

[0053] 1. Modification of carbon fiber surface by electrophoretic deposition of graphene oxide

[0054] (a) Preparation of electrophoretic solution: the concentration of graphene oxide solution is 200 mg / L, and the pH is adjusted to 11 with sodium hydroxide.

[0055] (b) Electrophoretic deposit...

Embodiment 2

[0063] Example 2 Preparation of Electrophoretic Deposition-Electropolymerization Combined Modified Carbon Fiber Epoxy Composite Material EPD / EPI-CF / EP of the present invention

[0064] Using the EPD / EPI-CF prepared in Example 1, epoxy resin E-51 (available from Wuxi Lanxing Resin Factory), and curing agent DDM (4,4-diaminodiphenylmethane) as raw materials, an electrophoretic Deposition-electropolymerization combined modified carbon fiber epoxy composite material EPD / EPI-CF / EP, the specific preparation process is as follows:

[0065] Using the hand lay-up process, the EPD / EPI-CF and epoxy resin are laid on the mold in a unidirectional way. Under the action of the curing agent DDM, the curing is carried out under the following conditions: the curing pressure is 5MPa, the temperature First at 135°C for 2 hours, then at 175°C for 2 hours, and demoulding to obtain EPD / EPI-CF / EP. In the process, the volume fraction of EPD / EPI-CF in the total raw materials is controlled to be 60%, a...

experiment example 1

[0092] Structural characterization of each modified carbon fiber of Experimental Example 1

[0093] 1. XPS elemental analysis of untreated carbon fiber CF

[0094] X-ray photoelectron spectroscopy (XPS) was used to analyze the elements on the surface of fibers by Escalab 250Xi instrument from American Thermo Fisher.

[0095] figure 1 It is the XPS elemental analysis of untreated carbon fiber CF. It can be seen that the unmodified carbon fiber surface has fewer active functional groups, lower polarity, and poor wettability to epoxy resin.

[0096] 2. Characterization of graphene concentration of graphene oxide modified carbon fiber EPD-CF deposited at different voltages

[0097] Ultraviolet-visible absorptiometry (UV-Vis): test with UV3600 UV-Vis-spectrophotometer from Shimadzu Corporation, Japan, and calculate the concentration according to the Beer-Lambert law.

[0098] figure 2 UV-vis absorption curves of EPD-CF deposited for different voltages. It can be seen that gra...

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Abstract

The invention provides a carbon fiber obtained by electrophoretic deposition-electropolymerization combined modification and a resin-based composite material of the carbon fiber. A modification methodof the carbon fiber comprises the following steps: firstly, depositing and coating graphene oxide on the surface of the carbon fiber by adopting an electrophoretic deposition method to obtain a graphene oxide coated carbon fiber, and then generating a polymer in situ at the surface interface of the obtained graphene oxide coated carbon fiber by using a electric polymerization method, washing withwater, and drying to obtain the electrophoretic deposition-electropolymerization combined modified carbon fiber. The carbon fiber modification method provided by the invention is simple, rapid and efficient, can realize continuous online production, adopts water as a reaction medium, and is green and environmentally friendly. The surface of the modified carbon fiber is rich in active functional groups, mechanical interlocking and chemical bonding of the modified carbon fiber and a resin matrix are facilitated, the interface performance of the modified carbon fiber and the resin matrix is greatly improved, the interlaminar shear strength, the storage modulus and the glass-transition temperature of the obtained resin-based composite material are remarkably improved, the mechanical propertyis excellent, and the resin-based composite material has extremely important application prospects.

Description

technical field [0001] The invention belongs to the field of composite materials, and in particular relates to a carbon fiber modified by combined electrophoretic deposition and electropolymerization and a resin-based composite material thereof. Background technique [0002] Carbon fiber is a new type of inorganic fiber material. Its reinforced resin-based composite material has a series of excellent properties such as high specific modulus, high specific strength, corrosion resistance, and high temperature resistance. It has been widely used in missiles, aerospace, automobiles, and stationery. and medical equipment and other fields. The performance of carbon fiber reinforced resin composites mainly depends on the performance of the carbon fiber as the reinforcement and the resin matrix as the bonding component. In addition, the resin matrix transmits the load to the carbon fiber as a continuous phase, and the interface performance between the two also determines the perform...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M11/74D06M15/263C08L63/00C08K9/02C08K9/10C08K7/06C08J5/06C25D13/02C25D13/16C25D13/08D06M101/40
CPCD06M11/74D06M15/263C08J5/06C08K9/02C08K9/10C08K7/06C25D13/02C25D13/16C25D13/04C08J2363/00D06M2101/40
Inventor 邹华维孙通梁梅陈洋张雪琴李霂萱
Owner SICHUAN UNIV
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