A kind of preparation method of bionic carbon fiber reinforced epoxy resin composite material
An epoxy resin, fiber reinforced technology, applied in the direction of additive processing, etc., can solve the problems of complex surface operation of carbon fiber, inability to provide multiple solutions, single arrangement structure, etc., to achieve a simple and efficient shear induction process and a simple preparation method. Efficient, wide-ranging effects
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[0046] A kind of preparation method of bionic carbon fiber reinforced epoxy resin composite material of the present invention, preparation steps are as follows:
[0047] Step 1: Prepare chopped carbon fibers with surface wettability
[0048] A. Composition of raw materials:
[0049] h 2 SO 4 and HNO 3 The mixture made of 3:1 (v / v) is the liquid phase oxidation solution, and the chopped carbon fiber is the treatment object;
[0050] The mass of carbon fiber is 2g;
[0051] The volume of the liquid phase oxidation solution is 70ml;
[0052] B. Ingredients:
[0053] a) Take the original material according to the proportioning ratio in A;
[0054] b) at room temperature, firstly adding chopped carbon fibers into a liquid-phase oxidation solution to form a mixture G;
[0055] c) Then put the mixture G into an ultrasonic cleaner, and ultrasonically disperse at room temperature for 4 hours;
[0056] d) After uniform dispersion, the mixture G is centrifuged in a high-speed ce...
Embodiment 1
[0071] Determining a biomimetic structural model by observing eagle feathers
[0072] The eagle feather is selected as the observation object; the angle between the rachis and the barb is 33°, and the cross structure of the barb is the key to improving the mechanical properties of the feather. When the barb is loaded, it is aligned along the axial stress direction, forming a fiber The cross structure, with a certain angle of the barb can provide additional resistance to resist the load, so as to enhance the mechanical performance; therefore, the angle between the eagle feather rachis and the barb is regarded as an important design parameter of the bionic structure model; considering In the preparation process, the bionic sample adopts a multi-layer structure design, and the angle between two adjacent layers is the same as that in the eagle feather structure. So far, the bionic structure model has been determined.
Embodiment 2
[0074] Preparation of biomimetic carbon fiber reinforced epoxy resin composites by "shear induction" and "layer by layer superposition" (refer to step 1, step 2)
[0075] Select chopped carbon fibers with good surface wettability, epoxy resin E-44, 650 polyamide resin curing agent, self-made 3D printing PLA mold and glass slide; the mass of chopped carbon fibers is 0.08g; the mass of resin matrix is 25g; The quality of the curing agent is 15g; mix the epoxy resin and the curing agent at a ratio of 5:3 (m / m), and stir at 60°C for 10 minutes in a digital display magnetic stirring oil bath; Chopped carbon fibers with good surface wettability were added to the mixture and stirred for 15 min, and ultrasonicated in an ultrasonic cleaner for 10 min to eliminate air bubbles; finally, epoxy resin with carbon fibers was poured into a PLA mold made in the laboratory and used on a glass slide Shear induction realizes the directional arrangement of carbon fibers in the resin matrix; each...
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