Modification method of interface between carbon fiber and non-polar resin
A non-polar resin and carbon fiber technology, applied in the field of interface modification of composite materials, can solve the problems of lack of surface activation method and low shear strength, and achieve the effects of enhanced adhesion, improved interface performance and good interface performance.
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specific Embodiment approach 1
[0010] Specific embodiment one: this specific embodiment is carried out according to the following steps: one, pretreatment: use acetone or ethanol to remove the original coating on carbon fiber surface; two, prepare coating solution: coating solution is made of vinyl silsesquisil Oxygen and tetrahydrofuran, the quality of the vinyl silsesquioxane accounts for 1% to 2% of the total mass of the coating solution; 3. Activated carbon fiber: use air-cooled plasma at a power of 150-200W Activating the carbon fiber, so that a large amount of active species is produced on the surface of the carbon fiber; 4. Introducing the coating solution: under the condition of maintaining a vacuum, the coating solution is introduced, and the carbon fiber is soaked in the coating solution for 5 to 35 minutes, so that the surface is activated. The carbon fiber reacts with the vinyl silsesquioxane; 5. Post-treatment: take out the carbon fiber from the plasma device, and dry it in a vacuum to obtain th...
specific Embodiment approach 2
[0012] Embodiment 2: The difference between this embodiment and Embodiment 1 is: the coating solution prepared in the second step contains 2 g of vinyl silsesquioxane, and 198 g of tetrahydrofuran; the third step uses air-cooled plasma in The carbon fiber is activated for 10 minutes at a power of 175W; the fourth step is to soak the carbon fiber in the coating solution for 15 minutes; the fifth step is to dry the carbon fiber at 50°C. Other steps are the same as in the first embodiment. This specific embodiment makes a large number of unsaturated double bonds matching the polyarylene with non-polar structure appear on the surface of the fiber. The interlaminar shear strength of the composite material prepared by the silsesquioxane modified carbon fiber and polyarylacetylene silicone resin prepared by this specific embodiment by molding can reach 49.2MPa at room temperature, which is different from that of untreated carbon fiber Compared with the composite material formed, the...
specific Embodiment approach 3
[0013] Specific embodiment three: the difference between this specific embodiment and specific embodiment two is: vinyl silsesquioxane contains 4g in the coating solution prepared in the second step, and tetrahydrofuran contains 196g; Soak in the coating solution for 20min. Other steps are the same as in the second embodiment. The interlaminar shear strength of the composite material prepared by molding the silsesquioxane modified carbon fiber and polyarylacetylene silicone resin prepared in this specific embodiment at room temperature can reach 41.7MPa, which is different from that of untreated carbon fiber Compared with the composite material formed, the interlaminar shear strength increased by 22%. As shown in Figure 2, the broken line with dots represents the increase rate of the interlaminar shear strength of the composite material treated with the coating solution containing 2% (mass ratio) of vinyl silsesquioxane compared with that in the coating solution Correspondin...
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Abstract
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