阅读说明：本技术 一种可抑制玻璃纤维束变形的玻璃纤维表面处理方法 (Glass fiber surface treatment method capable of inhibiting deformation of glass fiber bundle ) 是由 李美贤 于 2021-03-23 设计创作，主要内容包括：本发明涉及纤维表面处理技术领域,尤其涉及一种可抑制玻璃纤维束变形的玻璃纤维表面处理方法,包括以下步骤：步骤1、制备浓度为10-20wt％的明胶水溶液；步骤2、将玻璃纤维非屈曲织物浸泡于明胶水溶液中,使玻璃纤维非屈曲织物表面充分润湿于明胶水溶液中并在50～70℃下对其进行表面处理,实现明胶覆盖到玻璃纤维非屈曲织物表面；步骤3、对玻璃纤维非屈曲织物进行烘干处理,实现明胶固定玻璃纤维非屈曲织物表面的玻璃纤维束。本发明可在树脂流速大时抑制玻璃纤维束的变形,在树脂流速变小时可恢复玻璃纤维束形状。同时,本发明的表面处理方法操作简单、灵活,稳定性好,成本较低,操作条件要求低,有利于进行大规模工业化生产。(The invention relates to the technical field of fiber surface treatment, in particular to a glass fiber surface treatment method capable of inhibiting deformation of a glass fiber bundle, which comprises the following steps: step 1, preparing a gelatin aqueous solution with the concentration of 10-20 wt%; step 2, soaking the glass fiber non-bent fabric in a gelatin aqueous solution to fully wet the surface of the glass fiber non-bent fabric in the gelatin aqueous solution, and carrying out surface treatment on the glass fiber non-bent fabric at 50-70 ℃ to realize that gelatin covers the surface of the glass fiber non-bent fabric; and 3, drying the glass fiber non-bent fabric to fix the glass fiber bundles on the surface of the glass fiber non-bent fabric by using gelatin. The invention can restrain the deformation of the glass fiber bundle when the resin flow rate is high, and can recover the shape of the glass fiber bundle when the resin flow rate is low. Meanwhile, the surface treatment method disclosed by the invention is simple and flexible to operate, good in stability, lower in cost and low in requirement on operation conditions, and is beneficial to large-scale industrial production.)

1. A glass fiber surface treatment method capable of suppressing deformation of a glass fiber bundle, characterized by comprising the steps of:

step 1, preparing a gelatin aqueous solution, wherein the concentration of the gelatin aqueous solution is 10-20 wt%;

step 2, soaking the glass fiber non-bent fabric in the gelatin aqueous solution prepared in the step 1 to fully wet the surface of the glass fiber non-bent fabric in the gelatin aqueous solution and perform surface treatment on the surface of the glass fiber non-bent fabric to realize that the gelatin covers the surface of the glass fiber non-bent fabric;

and 3, drying the glass fiber non-buckling fabric in the step 2 to fix the glass fiber bundles on the surface of the glass fiber non-buckling fabric by gelatin.

2. The method for surface treatment of glass fiber capable of suppressing deformation of glass fiber bundle according to claim 1, wherein in the step (1), the viscosity of gelatin in gelatin aqueous solution is 30 to 40 mpa.s.

3. The method for surface treatment of glass fiber capable of suppressing deformation of glass fiber bundles according to claim 1, wherein in the step (2), the surface treatment temperature is 50 to 70 ℃ and the surface treatment time is 4 to 7 hours.

4. The method for surface treatment of glass fiber capable of suppressing deformation of glass fiber strand as set forth in claim 1, wherein the drying temperature in the step (3) is 100 ℃.

Technical Field

The invention relates to the technical field of fiber surface treatment, in particular to a glass fiber surface treatment method capable of inhibiting deformation of a glass fiber bundle.

Background

The liquid composite Resin Transfer Molding (RTM) and vacuum assisted resin transfer molding (VaRTM) forming processes are widely used in the manufacture of large composite structural members for aviation, automobiles, ships and the like, and have high cost benefits. The main principle of these manufacturing processes is to impregnate reinforcing materials such as glass fibers, carbon fibers, etc. with liquid resin. However, in the manufacturing process of the composite material, problems such as deformation of the fiber bundle due to the flow and pressure of the liquid resin may occur, thereby reducing the mechanical properties of the composite material. In view of the above, reducing the deformation of the fiber bundle is one of the important issues in the field of composite materials, and one of the main solutions is to perform surface treatment on the fiber reinforced material.

Gelatin is widely applied to various fields such as biology, medicine and the like due to unique characteristics, but the practical application of gelatin is limited due to poor mechanical properties of gelatin. However, researches related to the gelatin composite material report that although the mechanical property of the gelatin is poor, the gelatin has the effect of improving the mechanical properties such as tensile strength, elongation and the like of the composite material. Wan et al prepared a carbon fiber reinforced gelatin composite material by a solvent casting method or a solution impregnation method, and studied the rule of influence of parameters such as fiber volume fraction, glycerin content, gelatin content, fiber morphology and the like on the mechanical properties (tensile strength and modulus, elongation at break, shear strength and the like) of the composite material. Rodri i guez-Castellanos et al have studied the preparation of corn starch/gelatin/cellulose composites using hydrolyzed corn starch-gelatin as the matrix and cellulose as the reinforcing material using a twin screw co-rotating extruder. Zaman et al studied the effect of gelatin content changes and gamma radiation on the mechanical properties of polycaprolactone/gelatin film composites. Therefore, the invention provides a novel surface treatment mode aiming at the problem of fiber bundle deformation in the manufacturing process of the fiber reinforced composite material.

The untreated glass fibers have hysteresis so that the glass fiber bundles once deformed do not recover their shape as the flow rate of the resin decreases; however, the use of gelatin indicates that the treated glass fiber non-crimp fabric can recover its shape when the resin flow rate becomes small after the fiber bundle is deformed due to the large resin flow rate. In order to solve the problems, the method for treating the surface of the glass fiber by using the gelatin aqueous solution is tried to inhibit the deformation of the glass fiber bundle, and a new research idea is provided for the preparation of the fiber reinforced composite material and the higher mechanical property of the fiber reinforced composite material.

Disclosure of Invention

The invention aims to solve the defects in the prior art, and provides a glass fiber surface treatment method capable of inhibiting deformation of a glass fiber bundle, which can inhibit the deformation of the glass fiber bundle, reduce hysteresis phenomena and improve the mechanical property of a composite material.

In order to achieve the purpose, the invention adopts the following technical scheme:

a glass fiber surface treatment method capable of inhibiting deformation of a glass fiber bundle comprises the following steps:

step 1, preparing a gelatin aqueous solution, wherein the concentration of the gelatin aqueous solution is 10-20 wt%;

step 2, soaking the glass fiber non-bent fabric in the gelatin aqueous solution prepared in the step 1 to fully wet the surface of the glass fiber non-bent fabric in the gelatin aqueous solution and perform surface treatment on the surface of the glass fiber non-bent fabric to realize that the gelatin covers the surface of the glass fiber non-bent fabric;

and 3, drying the glass fiber non-bent fabric in the step 2 to fix the glass fiber bundles on the surface of the glass fiber non-bent fabric by using gelatin, so that the deformation of the glass fiber bundles is inhibited and the hysteresis phenomenon is reduced.

Preferably, in the step (1), the viscosity of the gelatin in the gelatin aqueous solution is 30-40 mPa.s.

Preferably, in the step (2), the surface treatment temperature is 50-70 ℃, and the surface treatment time is 4-7 hours.

Preferably, in the step (3), the drying temperature is 100 ℃.

Compared with the prior art, the invention has the following beneficial effects:

1. the invention not only enhances the effect of suppressing the deformation of the glass fiber bundle when the flow rate of the resin is large, but also can recover the shape of the glass fiber bundle when the flow rate of the resin is small.

2. The method has the advantages of simple operation, low cost and low requirement on operation conditions, and is favorable for large-scale industrial production.

Drawings

FIG. 1 is a schematic diagram of the deformation behavior of a glass fiber non-buckling fabric under different flow rates according to the present invention.

In the figure: (a) a glass fiber bundle whose surface is not treated, and (b) a glass fiber bundle whose surface is treated with gelatin.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings, so that those skilled in the art can better understand the advantages and features of the present invention, and thus the scope of the present invention is more clearly defined. The embodiments described herein are only a few embodiments of the present invention, rather than all embodiments, and all other embodiments that can be derived by one of ordinary skill in the art without inventive faculty based on the embodiments described herein are intended to fall within the scope of the present invention.

Example 1:

preparing a gelatin aqueous solution with the concentration of 10 wt% by using gelatin with the viscosity of 30-40 mPa.s, soaking the glass fiber non-bent fabric in the gelatin aqueous solution, and keeping the temperature of surface treatment at 50 ℃ for 4 hours to fully wet the surface of the glass fiber non-bent fabric in the gelatin aqueous solution. And finally drying at 100 ℃ to realize the gelatin fixing of the glass fiber non-bent fabric of the glass fiber bundle.

Example 2:

preparing a gelatin aqueous solution with the concentration of 15 wt% by using gelatin with the viscosity of 30-40 mPa.s, soaking the glass fiber non-bent fabric in the gelatin aqueous solution, and keeping the temperature of surface treatment at 60 ℃ for 5 hours to fully wet the surface of the glass fiber non-bent fabric in the gelatin aqueous solution. And finally drying at 100 ℃ to realize the gelatin fixing of the glass fiber non-bent fabric of the glass fiber bundle.

Example 3:

preparing a gelatin aqueous solution with the concentration of 20 wt% by using gelatin with the viscosity of 30-40 mPa.s, soaking the glass fiber non-bent fabric in the gelatin aqueous solution, and keeping the temperature of surface treatment at 70 ℃ for 6 hours to fully wet the surface of the glass fiber non-bent fabric in the gelatin aqueous solution. And finally drying at 100 ℃ to realize the gelatin fixing of the glass fiber non-bent fabric of the glass fiber bundle.

And (3) performance detection:

the fiber bundle deformation of the glass fiber non-crimp fabric subjected to the gelatin surface treatment obtained in each example is detected under various resin flow speeds, and specifically comprises the following steps: glass surface treated by gelatinThe glass fiber non-crimp fabric was stacked in an RTM mold so that the volume percentage thereof became 50%, and silicone oil (viscosity: 0.0965 Pa. s (below 25 ℃), surface tension: 20.9mN/m) was supplied at different flow rates (50, 100,200,400 mm)³/s) was injected into an RTM mold and the shape change of the glass fiber bundle was observed at various flow rates by an optical microscope. In terms of fiber bundle deformation, hydrodynamic force is applied to the fiber bundle and is compressed in the resin flow direction. As the fibers compress, the resin flow path changes resulting in a change in permeability. Increasing the resin flow rate enlarges the primary flow path between the fiber bundles, ultimately increasing permeability. Thus, a quantitative indication of the deformation of the glass fiber bundle is obtained by measuring the permeability of the glass fibers.

TABLE 1

As is apparent from the results of table 1 and fig. 1, the present invention, after surface-treating the glass fiber non-crimp fabric by the above method, not only reduced the deformation of the glass fiber bundle when the resin flow rate was high, but also reduced the hysteresis, and the glass fiber bundle recovered its shape after the resin flow rate was low.

The description and practice of the disclosure herein will be readily apparent to those skilled in the art from consideration of the specification and understanding, and may be modified and modified without departing from the principles of the disclosure. Therefore, modifications or improvements made without departing from the spirit of the invention should also be considered as the protection scope of the invention.