Polyphenylene sulfide thermoplastic prepreg preparation method capable of improving permeability

Abstract

The invention discloses a polyphenylene sulfide thermoplastic prepreg preparation method capable of improving permeability. The method comprises the following steps: smashing polyphenylene sulfide particles and screening three kinds of powder according to the particle size, wherein the three kinds of powder includes powder R1, powder R2 and powder R3, the particle size of the powder R1 is 10 mu mto 40 mu m, the particle size of the powder R2 is 50 mu m to 90 mu m, and the particle size of the powder R3 is 100 mu m to 150 mu m; mixing the powder R1, the powder R2 and the powder R3 according toa certain mass ratio to obtain mixed polyphenylene sulfide powder; mixing the mixed polyphenylene sulfide powder, deionized water, a surfactant and a defoaming agent together and evenly dispersing toobtain slurry; preparing the slurry and fiber together into the prepreg. According to the method disclosed by the invention, water is utilized as a solvent, so that solvent pollution is avoided; thesurfactant is utilized to evenly disperse powder particles in water, and the defoaming agent is added to improve a resin soaking effect; by means of utilizing powder materials with different particlesizes, even permeation can be achieved.

Description

technical field

[0001] The invention belongs to the field of preparation of composite material prepregs, and relates to a method for preparing polyphenylene sulfide thermoplastic prepregs with improved permeability. Background technique

[0002] Prepregs can be divided into thermosetting prepregs and thermoplastic prepregs according to the choice of matrix resin. Prepregs are widely used in aerospace and new energy vehicles, mainly as structural parts and interior parts. Due to the long preparation cycle of thermosetting prepregs, high requirements for molding equipment, poor environmental friendliness, and short storage period, thermoplastic prepregs have become one of the main development directions in the future. Thermoplastic prepregs are mainly composed of reinforcing fibers (glass fiber, carbon fiber, etc.) and thermoplastic resins (polypropylene, nylon, polyether ether ketone, polyphenylene sulfide, etc.). The processing technology of thermoplastic prepreg mainly inc...

Examples

Embodiment 1

[0039] (1) The polyphenylene sulfide particles were ground in a liquid nitrogen pulverizer at -5°C for 30-120 minutes to obtain three powder particle sizes: 30um (R1), 75um (R2), and 120um (R3).

[0040] (2) Mix powders of three different particle sizes by a high-speed mixer in proportion, R1:R2:R3 (mass ratio)=1:2:7.

[0041] (3) Mix 50 parts of polyphenylene sulfide powder, 150 parts of deionized water, 3 parts of surfactant (fatty alcohol polyoxyethylene ether), 0.5 parts of defoamer BYK-A530, stir under mechanical stirring and ultrasonic vibration 40min. The conductivity of the deionized water used is 10us / cm.

[0042] (4) Preparation of carbon fiber thermoplastic prepreg: pour the above slurry into the dipping tank; carbon fiber (FAW: 100g / m 2 ) is drawn from the creel to weave the yarn, and the sizing agent on the surface of the carbon fiber is removed through a high-temperature furnace at 300°C, and passed through the dipping tank at a line speed of 3m / min to make the...

Embodiment 2

[0044] In this example, compared with Example 1, the amount of small particle size powder used is increased, and the amount of defoamer used is increased to improve the penetration effect of polyphenylene sulfide.

[0045] (1) The polyphenylene sulfide particles were ground in a liquid nitrogen pulverizer at -5°C for 30-120 minutes to obtain three powder particle sizes: 30um (R1), 75um (R2), and 120um (R3).

[0046] (2) Mix powders of three different particle sizes by a high-speed mixer according to the ratio, R1:R2:R3 (mass ratio)=4:3:3.

[0047] (3) Mix 50 parts of polyphenylene sulfide powder, 150 parts of deionized water, 3 parts of surfactant fatty alcohol polyoxyethylene ether, 2.5 parts of defoamer BYK-A 530, and stir for 40 minutes under mechanical stirring and ultrasonic vibration . The conductivity of the deionized water used is 10us / cm.

[0048] (4) Preparation of carbon fiber thermoplastic prepreg: pour the above slurry into the dipping tank; carbon fiber (FAW: 1...

Embodiment 3

[0050]Compared with Example 1, this example only increases the amount of powder with a small particle size. The ratio of polyphenylene sulfide powders with three different particle sizes is R1:R2:R3=4:3:3. Others are all the same as in Example 1.

technical field

[0001] The invention belongs to the field of preparation of composite material prepregs, and relates to a method for preparing polyphenylene sulfide thermoplastic prepregs with improved permeability. Background technique

[0002] Prepregs can be divided into thermosetting prepregs and thermoplastic prepregs according to the choice of matrix resin. Prepregs are widely used in aerospace and new energy vehicles, mainly as structural parts and interior parts. Due to the long preparation cycle of thermosetting prepregs, high requirements for molding equipment, poor environmental friendliness, and short storage period, thermoplastic prepregs have become one of the main development directions in the future. Thermoplastic prepregs are mainly composed of reinforcing fibers (glass fiber, carbon fiber, etc.) and thermoplastic resins (polypropylene, nylon, polyether ether ketone, polyphenylene sulfide, etc.). The processing technology of thermoplastic prepreg mainly inc...

Examples

Embodiment 1

[0039] (1) The polyphenylene sulfide particles were ground in a liquid nitrogen pulverizer at -5°C for 30-120 minutes to obtain three powder particle sizes: 30um (R1), 75um (R2), and 120um (R3).

[0040] (2) Mix powders of three different particle sizes by a high-speed mixer in proportion, R1:R2:R3 (mass ratio)=1:2:7.

[0041] (3) Mix 50 parts of polyphenylene sulfide powder, 150 parts of deionized water, 3 parts of surfactant (fatty alcohol polyoxyethylene ether), 0.5 parts of defoamer BYK-A530, stir under mechanical stirring and ultrasonic vibration 40min. The conductivity of the deionized water used is 10us / cm.

[0042] (4) Preparation of carbon fiber thermoplastic prepreg: pour the above slurry into the dipping tank; carbon fiber (FAW: 100g / m 2 ) is drawn from the creel to weave the yarn, and the sizing agent on the surface of the carbon fiber is removed through a high-temperature furnace at 300°C, and passed through the dipping tank at a line speed of 3m / min to make the...

Embodiment 2

[0044] In this example, compared with Example 1, the amount of small particle size powder used is increased, and the amount of defoamer used is increased to improve the penetration effect of polyphenylene sulfide.

[0045] (1) The polyphenylene sulfide particles were ground in a liquid nitrogen pulverizer at -5°C for 30-120 minutes to obtain three powder particle sizes: 30um (R1), 75um (R2), and 120um (R3).

[0046] (2) Mix powders of three different particle sizes by a high-speed mixer according to the ratio, R1:R2:R3 (mass ratio)=4:3:3.

[0047] (3) Mix 50 parts of polyphenylene sulfide powder, 150 parts of deionized water, 3 parts of surfactant fatty alcohol polyoxyethylene ether, 2.5 parts of defoamer BYK-A 530, and stir for 40 minutes under mechanical stirring and ultrasonic vibration . The conductivity of the deionized water used is 10us / cm.

[0048] (4) Preparation of carbon fiber thermoplastic prepreg: pour the above slurry into the dipping tank; carbon fiber (FAW: 1...

Embodiment 3

[0050]Compared with Example 1, this example only increases the amount of powder with a small particle size. The ratio of polyphenylene sulfide powders with three different particle sizes is R1:R2:R3=4:3:3. Others are all the same as in Example 1.

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