A modified carbon fiber with composite mechanical interlocking structure interface and its composite material
A composite material and carbon fiber technology, used in carbon fiber, fiber processing, textiles and papermaking, etc., can solve the problems of weak bonding between graphene oxide and carbon fiber, difficult to obtain carbon fiber with interface properties, and difficult to obtain performance composite materials, etc. Effects of improved interlocking strength and wettability, synergistic enhancement of interfacial properties, and improved interlaminar shear strength and interfacial shear strength
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0047] Embodiment 1, preparation graphene oxide / carboxymethyl cellulose modified carbon fiber (CF / GO / CMC)
[0048] Preparation of sizing agent: Take a 200 ml beaker and add 100 ml of deionized water, then add 0.003 g of graphene oxide and 0.05 g of sodium carboxymethyl cellulose to the beaker. Stir for 2 hours to make the system uniformly dispersed. The beaker was then ultrasonically treated (500 W) for 30 min to exfoliate GO into monolayer flakes. That is, the sizing agent is prepared.
[0049] Preparation of CF / GO / CMC: Immerse the tetrafluoroethylene sample wound by 5m-long polyacrylonitrile-based carbon fiber into the above beaker, take it out after immersion for 10 minutes, and dry it in a 40°C oven to form a film to obtain graphene oxide / carboxymethyl Cellulose modified carbon fiber (CF / GO / CMC). Preparation process reference figure 1 shown.
Embodiment 2
[0050] Embodiment 2, preparation CF / GO / CMC carbon fiber reinforced composite material
[0051] Stir E51 (20 g) and DDM (5.6 g) at 70-85° C. for 5 minutes to obtain a mixed system. Using the mixed system as a sizing agent, the sizing agent was evenly coated on the surface of CF / GO / CMC obtained in Example 1 with a roller, and the volume ratio of E51 to CF / GO / CMC was controlled to be 3:2. Then put the sized system into a laminate mold (140.0mm in length, 6.5mm in width, and 2.0mm in height), and cure it under the following conditions: first, heat preservation and pressure at 10Mpa and 135°C for 2 hours, and then at 10Mpa, The CF / GO / CMC carbon fiber-reinforced composite material was prepared by heat preservation and pressure holding at 175°C for 2 hours. Preparation process reference figure 1 shown.
[0052] The following is the preparation of control carbon fibers and control composites.
experiment example 1
[0066] Experimental example 1, FTIR test
[0067] 1. Experimental method
[0068] Experimental objects: CF / GO / CMC prepared in Example 1, CF / GO prepared in Comparative Example 1, CF / CMC prepared in Comparative Example 3, and unmodified carbon fiber (CF) prepared in Comparative Example 5.
[0069] Test method: use KBr powder pressing method, pass FTIR spectrophotometer ((FTIR, Nicolet570, USA) at 500~4000cm -1 test within the range.
[0070] 2. Experimental results
[0071] The result is as image 3 shown. Spectrum, 2800~2980cm -1 The broadband corresponds to the C-H of the methyl and methylene bending vibrations, 3416 cm -1 The peak at is the stretching of -OH groups and hydrogen bonds, and the -OH peak of CF is mainly from the water molecules adsorbed on the surface. It can be seen from the FTIR spectrum of CF / GO / CMC that with the addition of graphene oxide and sodium carboxymethyl cellulose, the vibration peaks become wider and stronger, indicating that both sodium car...
PUM
| Property | Measurement | Unit |
|---|---|---|
| diameter | aaaaa | aaaaa |
| diameter | aaaaa | aaaaa |
| density | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More