CN-118404867-B - Light corrosion-resistant material for automobile bottom guard board and preparation method thereof

CN118404867BCN 118404867 BCN118404867 BCN 118404867BCN-118404867-B

Abstract

The invention discloses a light corrosion-resistant material for an automobile bottom guard plate and a preparation method thereof, wherein the light corrosion-resistant material is prepared by compounding an aramid fiber-glass-carbon fiber composite layer and an LWRT (LWRT) plate layer in an intra-layer/inter-layer hybrid mode, wherein the aramid fiber-glass-carbon fiber composite layer is formed by braiding aramid fiber, glass fiber and carbon fiber by adopting a warp knitting tetraxial structure. The invention is prepared by compounding the LWRT plate layer and the aramid fiber-glass-carbon fiber composite layer in an intra-layer/inter-layer hybrid mode, so that the light corrosion-resistant material is lighter while the structural strength of the light corrosion-resistant material is ensured.

Inventors

ZHOU YANCHENG
HU LEIMING
ZHANG JUN
HUANG HUI

Assignees

江苏森远汽车部件有限公司

Dates

Publication Date: 20260508
Application Date: 20240419

Claims (6)

1. The light corrosion-resistant material for the automobile bottom guard board is characterized in that an aramid fiber-glass-carbon fiber composite layer and an LWRT board layer are composited in an intra-layer/inter-layer hybrid mode, and composite epoxy resin is used between the aramid fiber-glass-carbon fiber composite layer and the LWRT board layer for combination, wherein the aramid fiber-glass-carbon fiber composite layer is formed by weaving aramid fiber, glass fiber and carbon fiber by adopting a warp knitting tetraaxial structure; the preparation method of the light corrosion-resistant material for the automobile bottom guard plate comprises the following steps: s1, preparing an aramid fiber-glass-carbon fiber composite layer: Selecting filament bundles of aramid fibers, filament bundles of glass fibers and filament bundles of carbon fibers according to the number of the filament bundles of 1:1:2, knitting by adopting a warp knitting tetraaxial structure to obtain an in-layer hybrid, uniformly coating composite epoxy resin on the upper surface of the in-layer hybrid according to the volume ratio of 3:2, attaching a vacuum bag on the in-layer hybrid, pressurizing the in-layer hybrid for 2 hours by pressure difference generated by vacuumizing, wherein the vacuum degree is 1X 10 -2 ~1×10 -1 Pa, enabling the composite epoxy resin to uniformly permeate from the upper surface to the lower surface of the in-layer hybrid until the composite epoxy resin is completely soaked, and standing for 24 hours at normal temperature after the composite epoxy resin is permeated to obtain an aramid fiber-glass-carbon fiber composite layer with the thickness of 1-3 mm; S2, preparing a light corrosion-resistant material: Stacking n aramid fiber-glass-carbon fiber composite layers with the thickness of 1-3 mm and n-1 LWRT (LWRT) plate layers with the thickness of 1mm in an intra-layer/inter-layer hybrid manner, enabling the upper side and the lower side to be respectively provided with the aramid fiber-glass-carbon fiber composite layers, coating composite epoxy resin with the thickness of 0.5-1 mm between each aramid fiber-glass-carbon fiber composite layer and each LWRT plate layer in the stacking process, attaching a vacuum bag on the intra-layer hybrid body, pressurizing the intra-layer hybrid body for 2 hours through a pressure difference generated by vacuumizing, and pressing the aramid fiber-glass-carbon fiber composite layers and the LWRT plate layers with the vacuum degree of 1 x 10-2-1 x 10-Pa, and standing for 24 hours at normal temperature to obtain a light corrosion-resistant material; the method for etching the carbon fiber and attaching the amino group-containing carbamyl hydrazine to the etched carbon fiber in multiple stages comprises the following steps: 1) Cleaning the carbon fiber by using pure water, immersing the cleaned carbon fiber in a nitric acid solution with the mass concentration of 30% for 90s after drying, washing the carbon fiber for a plurality of times by using the pure water, and drying to obtain etched carbon fiber; 2) Soaking the etched carbon fiber in a carbamyl hydrazine aqueous solution with the mass concentration of 20%, fishing out the carbon fiber, cleaning the carbon fiber by using pure water, drying the carbon fiber at 45 ℃ for 30s, continuously soaking the carbon fiber in the carbamyl hydrazine aqueous solution with the mass concentration of 20%, repeating the steps for five times, wherein the single soaking time is 12min, and obtaining the carbon fiber subjected to multi-stage adhesion treatment.
2. The light corrosion-resistant material for an automobile bottom guard board according to claim 1, wherein in the warp-knitted four-axis structure of the aramid fiber-glass-carbon fiber composite layer, carbon fibers are subjected to 45 DEG and-45 DEG biaxial warp knitting, aramid fibers and glass fibers are subjected to 0 DEG and 90 DEG biaxial warp knitting, and a matrix of the aramid fiber-glass-carbon fiber composite layer is composite epoxy resin.
3. The light corrosion-resistant material for the automobile bottom guard board according to claim 1, wherein in the warp-knitted four-axis structure of the aramid fiber-glass-carbon fiber composite layer, nylon low stretch yarn or polyester low stretch yarn with a thickness of 10-20 tex is adopted as binding yarn.
4. The light corrosion-resistant material for the automobile bottom guard board according to claim 1, wherein the preparation method of the composite epoxy resin is characterized in that the epoxy resin and the curing agent are mixed according to the mass ratio of 100:30, and nano carbon spheres accounting for 2-6% of the total mass of the epoxy resin and the curing agent are added into the mixture, and the mixture is uniformly mixed.
5. The light corrosion-resistant material for the automobile bottom guard board according to claim 1, wherein the filament bundle linear density of the aramid fiber, the filament bundle linear density of the glass fiber and the filament bundle linear density of the carbon fiber are 300-400 tex, and nylon low stretch yarn or polyester low stretch yarn with the density of 10-20 tex is adopted as binding yarn.
6. The method for preparing the light corrosion-resistant material for the automobile bottom guard board according to claim 1, wherein anti-corrosion paint is sprayed on the aramid fiber-glass-carbon fiber composite layers on the outer layers of the two sides of the light corrosion-resistant material.

Description

Light corrosion-resistant material for automobile bottom guard board and preparation method thereof Technical Field The invention relates to the technical field of new materials, in particular to a light corrosion-resistant material for an automobile bottom guard board and a preparation method thereof. Background The design concept of the engine protection device is that the engine is damaged by preventing protruding stones on the road surface from striking, and the engine is protected from soil and sewage from invading an engine bin in the driving process, so that the engine is damaged, and the most comprehensive protection is provided for the engine through the 3D three-dimensional design of the chassis of the original parking space. The automobile bottom guard board can well protect an engine from being impacted and mud on the ground splashes on the engine when passing through a plurality of rugged road surfaces with mud, and can avoid the problem that an automobile is anchored due to damage of the engine in the traveling process as much as possible, but the common bottom guard board in the market usually adopts metal materials such as iron and the like, rust can be generated after long-time use and the operation of the automobile is unfavorable, and once a fixing bolt loosens or the lower guard board collides with an oil pan, the automobile can generate great noise, and the weight of the metal bottom guard board can also cause the increase of the overall automobile quality, so that a novel automobile bottom guard board is needed to optimize the problems. Disclosure of Invention In order to solve the technical problems, the invention provides a light corrosion-resistant material for an automobile bottom guard plate and a preparation method thereof. The technical scheme is that the light corrosion-resistant material for the automobile bottom guard board is formed by compounding an aramid fiber-glass-carbon fiber composite layer with an LWRT board layer in an intra-layer/inter-layer hybrid mode, and combining the aramid fiber-glass-carbon fiber composite layer with the LWRT board layer by using composite epoxy resin, wherein the aramid fiber-glass-carbon fiber composite layer is formed by weaving aramid fiber, glass fiber and carbon fiber by adopting a warp knitting tetraaxial structure. Further, in the warp-knitted tetraaxial structure of the aramid fiber-glass-carbon fiber composite layer, carbon fibers are subjected to 45 DEG and-45 DEG biaxial warp knitting, the aramid fiber and glass fibers are subjected to 0 DEG and 90 DEG biaxial warp knitting, and a matrix of the aramid fiber-glass-carbon fiber composite layer adopts composite epoxy resin. The structural design of the aramid fiber-glass-carbon fiber composite layer is adopted, aramid fiber and glass fiber bundles in the structure are arranged in parallel, binding yarns are also arranged in parallel, carbon fibers are interwoven to form a cross staggered structure, and after the composite epoxy resin is impregnated and cured, the composite material with excellent performance can be obtained, so that the aramid fiber-glass-carbon fiber composite layer can bear larger stress when impacted, and the structural design can enable the aramid fiber-glass-carbon fiber composite layer to have higher tensile strength and elastic modulus, so that excellent strength and stability are given to the aramid fiber-glass-carbon fiber composite layer. Further, in the warp-knitted tetraaxial structure of the aramid fiber-glass-carbon fiber composite layer, nylon low stretch yarn or polyester low stretch yarn with the thickness of 10-20 tex is adopted as the binding yarn. The nylon low stretch yarn or the terylene low stretch yarn has the advantages that the elasticity is smaller, the size and the shape stability are better, when the aramid fiber-glass-carbon fiber composite layer is woven through a warp knitting tetraaxial structure, the low stretch yarn can help to keep the shape of a product, the possibility of deformation and distortion is reduced, the low stretch yarn is easy to process, and the better operability and the flexibility can be improved; The nylon low-stretch yarn has excellent wear resistance and has the capability of stretching and recovering within a certain range, so that the nylon low-stretch yarn can provide a stable shape and improve the impact resistance of the aramid fiber-glass-carbon fiber composite layer while keeping certain elasticity; The terylene low stretch yarn has excellent breaking strength and elastic modulus, the strength is far higher than that of other natural fibers and synthetic fibers, the terylene low stretch yarn has good heat resistance and thermal stability, the wear resistance is inferior to that of nylon, and the terylene low stretch yarn can resist the attack of bleaching agents, hydrocarbons, ketones, petroleum products and inorganic acid, is resistant to dilute alkali and mildew, and can keep stable performance in var