Interlayer toughened composite material and preparation method and application thereof
A technology of toughening composite materials and resin materials, which is applied in the field of fiber reinforced composite materials and fiber reinforced resin base layers to toughen composite materials, which can solve the problem of changes, difficulty in accurately controlling the range of shear performance of fiber reinforced composite materials, and The space geometry of the binding yarn coils is complicated, etc., and the bending elastic modulus is improved, the interface interaction is good, and the effect is obvious.
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[0035] One aspect of the embodiments of the present invention provides a method for preparing an interlayer toughened composite material, comprising:
[0036] The embodiment of the present invention provides a preparation method of an interlayer toughened composite material, which includes:
[0037] Providing a reinforcement comprising a plurality of first fiber aggregates stacked in a thickness direction thereof, wherein the first fiber aggregates comprise a plurality of first fiber aggregates oriented in a specified direction (ie, a direction perpendicular to the thickness of the reinforcement) fiber;
[0038] At least one braided body is woven with the plurality of first fiber aggregates along the thickness direction of the reinforcement to form a braided structure, wherein each braided body is continuously adjacent to two from two or more first fiber aggregates. pass between the first fibers;
[0039] The braided structure is wetted with a fluid containing a curable resi...
Example Embodiment
[0092] Embodiment 1: The preparation method of an interlayer toughened composite material involved in this embodiment specifically includes the following steps:
[0093] With carbon fiber as the reinforcing fiber, the multi-layer carbon fiber unidirectional cloth is arranged in parallel along the thickness direction, and the carbon nanotube strips with a thickness of about 15 μm and a width of 5 mm are perpendicular to the carbon fiber direction to weave the multi-layer carbon fiber cloth in the thickness direction. The auxiliary process is immersed in epoxy resin, and cured and formed into a carbon fiber reinforced composite material, wherein the content of the resin material is 40wt%. Further, the interlayer performance test results of the interlayer toughened composite material obtained by adding CNT strips in this example are shown in image 3 shown. The three-point bending test results show that the bending elastic modulus of the interlayer toughened composite material o...
Example Embodiment
[0094] Embodiment 2: The preparation method of an interlayer toughened composite material involved in this embodiment specifically includes the following steps:
[0095] The aramid fiber is used as the reinforcing fiber, and the multi-layer aramid fiber unidirectional fabric is arranged in parallel along the thickness direction. The graphene strips about 50 μm thick and 50 mm wide are perpendicular to the direction of the aramid fiber. The fiber unidirectional cloth is woven in the thickness direction, and epoxy groups are distributed on the surface of the graphene, which is immersed in the unsaturated polyester resin by means of a soaking method, and is cured and formed into a composite material reinforced by the polysulfone fiber, wherein the content of the resin material is 50wt%. The performance test data of the composite material obtained in this example are basically consistent with the examples.
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