CN115181415A - Wear-resistant nylon material and preparation method thereof - Google Patents

Abstract

The application discloses a wear-resistant nylon material and a preparation method thereof, wherein the preparation method comprises the following steps: melting nylon, and filling the melted nylon into the hollow mesoporous nano silicon dioxide spheres; mixing and heating the hollow mesoporous nano-silica spheres filled with nylon, glass fiber, lubricant, compatilizer and anti-aging agent, and kneading the mixture for at least 10min by using a kneader to obtain a mixture; carrying out melt extrusion on the obtained mixture through a double-screw extruder to obtain composite particles; and cooling and drying the composite particles to obtain the wear-resistant nylon material. The invention can obtain the nylon material with wear-resisting property.

Description

Wear-resistant nylon material and preparation method thereof

Technical Field

The application relates to the technical field of nylon materials, in particular to a wear-resistant nylon material and a preparation method thereof.

Background

Nylon (PA) is a thermoplastic engineering plastic containing amido bonds (-NHCO-) in the molecular main chain. Since the United states DuPont company introduced in 1930, PA has been widely used in the fields of automobile industry, electronic appliances, synthetic fibers, buildings and the like, and becomes one of the engineering plastics with the largest yield and the widest application range in the world today.

The application provides a wear-resistant nylon material and a preparation method thereof.

Disclosure of Invention

The application aims to overcome the defects in the prior art, and provides a wear-resistant nylon material and a preparation method thereof, so that the nylon material with wear-resistant characteristics can be obtained.

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

in one aspect, the present invention provides a wear resistant nylon material comprising:

50-60 parts of nylon;

25-35 parts of glass fiber;

1-5 parts of hollow mesoporous nano silicon dioxide spheres;

5-10 parts of a lubricant;

1-5 components of a compatilizer;

1-2 components of age resister.

Further, the nylon 56 component;

a glass fiber 30 component;

a hollow mesoporous nano-silica sphere 3 component;

a lubricant 7 component;

a compatilizer 3 component;

and (4) anti-aging agent 1.

Further, the lubricant comprises an ionic liquid and polytetrafluoroethylene.

Further, the component ratio of the ionic liquid to the polytetrafluoroethylene is 5:2.

further, the cross section of the glass fiber is elliptical.

Further, the density of the glass fiber is 2.4-2.6g/cm ³ 。

Further, the compatibilizer includes maleic anhydride grafted POE, maleic anhydride grafted PE, or maleic anhydride grafted EPDM.

Further, the diameter of the hollow mesoporous nano silicon dioxide ball is 0.5-3um;

the diameter of the mesopores of the hollow mesoporous nano silicon dioxide spheres is 20-50 nanometers.

On the other hand, the invention provides a preparation method of a wear-resistant nylon material, which comprises the following steps:

melting nylon, and filling the melted nylon into the hollow mesoporous nano silicon dioxide spheres;

mixing and heating the hollow mesoporous nano-silica spheres filled with nylon, glass fibers, a lubricant, a compatilizer and an anti-aging agent, and kneading the mixture for at least 10min by using a kneader to obtain a mixture;

melting and extruding the obtained mixture through a double-screw extruder to obtain composite particles;

and cooling and drying the composite particles to obtain the wear-resistant nylon material.

Further, the mixing and heating temperature is 210-220 ℃.

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

the wear-resistant nylon material comprises nylon, glass fiber, hollow mesoporous nano-silica spheres, a lubricant, a compatilizer and an anti-aging agent, has the advantages of flat and neat appearance, high sphere indentation hardness of 220, and good tensile strength, bending modulus and notch impact strength.

Detailed Description

Example 1

The embodiment provides a wear-resistant nylon material.

The wear-resistant nylon material of the embodiment comprises: 50-60 parts of nylon; 25-35 parts of glass fiber; 1-5 parts of hollow mesoporous nano silicon dioxide spheres; 5-10 components of a lubricant; 1-5 components of a compatilizer; 1-2 components of age resister.

Wherein the lubricant comprises ionic liquid and polytetrafluoroethylene. In application, the component ratio of the ionic liquid to the polytetrafluoroethylene is 5:2.

further, the compatibilizing agent includes maleic anhydride grafted POE, maleic anhydride grafted PE, or maleic anhydride grafted EPDM.

In practical application of this example, the nylon 56 component; a glass fiber 30 component; a hollow mesoporous nano-silica sphere 3 component; a lubricant 7 component; a compatilizer 3 component; and (4) anti-aging agent 1.

Wherein the glass fibres areThe cross section is elliptical, and the density of the glass fiber is 2.4-2.6g/cm ³ 。

In addition, the diameter of the hollow mesoporous nano-silica spheres is 0.5-3um, and the diameter of the mesopores of the hollow mesoporous nano-silica spheres is 20-50 nm.

Example 2

On the basis of example 1, this example describes a preparation method of an abrasion-resistant nylon material in detail.

The preparation method of the wear-resistant nylon material comprises the following steps:

s1, melting nylon, and filling the molten nylon into the hollow mesoporous nano silicon dioxide spheres.

In application, the preparation steps of the hollow mesoporous nano-silica spheres comprise: based on hydrogen bond action, the chiral template is processed in a sol-gel way to obtain the silicon dioxide hollow sphere with mesopores. In addition, the diameter of the hollow mesoporous nano-silica spheres is 0.5-3um, and the diameter of the mesopores of the hollow mesoporous nano-silica spheres is 20-50 nm.

In practical application, the nylon is filled into the hollow mesoporous nano silicon dioxide spheres, so that the compatibility and cohesive force of the hollow mesoporous nano silicon dioxide spheres and the nylon are improved.

S2, mixing and heating the hollow mesoporous nano-silica spheres filled with the nylon, the glass fiber, the lubricant, the compatilizer and the anti-aging agent, and kneading the mixture for at least 10min by using a kneader to obtain a mixture. In application, the mixing heating temperature is 210-220 ℃, and the rotation speed of the kneader is 42rpm.

The lubricant can improve cohesive force in the wear-resistant nylon material and hardness, namely crystallinity, of the wear-resistant nylon material.

In applications, the lubricant includes an ionic liquid and polytetrafluoroethylene. When the ionic liquid and the polytetrafluoroethylene are mixed according to the weight ratio of 5:2, the lubricating index can be greatly improved, so that the wear-resistant property of the wear-resistant nylon material is improved.

In practical application, due to the lubricity of the ionic liquid and the tetrafluoroethylene, the hollow mesoporous nano-silica spheres are moved to the surface of the wear-resistant nylon material in the processing process, so that the hardness of the wear-resistant nylon material is improved, and the wear resistance of the wear-resistant nylon material is improved.

The ionic liquid of the embodiment can promote the dispersion degree of nylon, hollow mesoporous nano-silica spheres, glass fibers, lubricants, compatilizers and anti-aging agents in the processes of mixing, heating, kneading by a kneader and subsequent preparation of composite particles, so that the mechanical property of the wear-resistant nylon material is improved, the warping defect of the wear-resistant nylon material is reduced, and the appearance property and the wear resistance of the wear-resistant nylon material are balanced.

In addition, the cross section of the glass fiber is elliptical, and the density of the glass fiber is 2.4-2.6g/cm ³ . By adding the glass fiber with the oval cross section, the orientation of the nylon material can be reduced, and the mechanical property of the nylon material is optimized.

In practical application of this embodiment, the preparation method of the wear-resistant nylon material further includes adding calcium chloride and anhydrous magnesium carbonate into a kneader.

The calcium chloride is Lewis acid, and the calcium chloride and the nylon generate a complex reaction, so that the movement of a nylon molecular chain is limited, the crystallinity of the nylon is hindered, the shrinkage rate of an injection molding piece of the nylon is reduced, a finished product forms a good appearance, and the shrinkage wall and the warping are reduced.

The anhydrous magnesium carbonate can absorb heat during combustion and decompose to generate carbon dioxide, so that the oxygen concentration at the periphery of the nylon material can be reduced, and the wear-resistant effect is achieved.

And S3, carrying out melt extrusion on the obtained mixture through a double-screw extruder to obtain composite particles.

In use, the twin screw extruder was operated at 250rpm.

In practical application, the temperature of each zone of the double-screw extruder is set as follows: 220-230 ℃ in the first zone, 230-240 ℃ in the second zone, 230-240 ℃ in the third zone, 240-250 ℃ in the fourth zone, 250-260 ℃ in the fifth zone, 260-270 ℃ in the sixth zone, 270-280 ℃ in the seventh zone, 270-280 ℃ in the eighth zone, 260-270 ℃ in the ninth zone and 260-270 ℃ in the tenth zone.

In addition, the residence time in each zone is from 1 to 2 minutes and the pressure is from 12 to 18MPa.

And S4, cooling and drying the composite particles to obtain the wear-resistant nylon material.

In use, the composite particles are dried by cooling at room temperature.

Examples 3 to 5

Examples 3-5 and comparative examples 1-2 wear-resistant nylon materials were prepared according to the materials and components in table 1, and the overall properties of the wear-resistant nylon materials obtained in the examples were tested according to the testing methods or conditions in table 2, and the testing results are detailed in table 3.

Table 1 examples materials and their components

Nylon

Glass fiber

Hollow mesoporous nano silicon dioxide ball

Lubricant agent

Compatilizer

Anti-aging agent

Example 3

Nylon 50 component

The density was 2.4g/cm 3 Is Glass fiber

A hollow medium with a diameter of 0.5 and a diameter of 20nm Porous nano-silica spheres

Lubricant 5 Components

Maleic anhydride grafted POE 1 component (A)

Anti-aging agent 2 Components

Example 4

Nylon 56 component

The density was 2.5g/cm 3 Is/are as follows Glass fiber 30 component

Hollow core with diameter of 1.5um and mesoporous diameter of 35nm Mesoporous nano silicon dioxide ball

Lubricant 7 Components

Maleic anhydride grafted PE 3 Components

Anti-aging agent 1 Components

Example 5

Nylon 60 component

The density is 2.6g/cm 3 Is/are as follows Glass fiber

Hollow medium with diameter of 3um and mesoporous diameter of 50nm Porous nano silicon dioxide ball

Lubricant 10 Components

Maleic anhydride grafted EPDM 5 Components

Anti-aging agent 1 Components

Comparative example 1

Nylon 56 component

The density was 2.5g/cm 3 Is/are as follows Glass fiber 30 component

Hollow with diameter of 1.5um and mesoporous diameter of 35nm Mesoporous nano silicon dioxide ball

0 component (a)

Maleic anhydride grafted PE 3 component (A)

Anti-agingAgent 1 Components

Comparative example 2

Nylon 56 component

The density was 2.5g/cm 3 Is Glass fiber 30 component

0 component (a)

0 component (B)

Maleic anhydride grafted PE 3 Components

Anti-aging agent 1 Components

TABLE 2 comprehensive property detection method or condition of wear-resistant nylon material

	Detection standard
		Tensile strength	Reference standard: ISO527-2; and (3) testing conditions: the clamping distance is 50mm, and the speed is 50mm/min.
Bending strength	Reference standard: ISO178; and (3) testing conditions are as follows: span 64mm, speed 2mm/min.
		Flexural modulus	Reference standard: ISO178
Notched impact strength	Reference standard: ISO179; and (3) testing conditions: stride withAt a distance of 62mm.
		Ball indentation hardness	DIN53456
Coefficient of friction	GB/T 10006-1988

TABLE 3 comprehensive properties of abrasion-resistant nylon materials

	Tensile strength MPa	Bending strength MPa	Flexural modulus MPa	Notched impact strength KJ/m 2	Ball indentation hardness	Coefficient of friction	Whether or not there is warpage	Whether the glass fiber is exposed
									Example 3	152	190	6000	12	190	0.19	Is free of	Is composed of
Example 4	185	255	8900	13	220	0.18	Is free of	Is free of
									Example 5	155	191	8500	12	205	0.18	Is free of	Is free of
Comparative example 1	130	178	5600	9.5	120	2.5	Is provided with	Is provided with
									Comparative example 2	125	172	5200	13	100	2.5	Is provided with	Is provided with

The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.

Claims (10)

1. A wear-resistant nylon material, comprising:

50-60 parts of nylon;

25-35 parts of glass fiber;

1-5 parts of hollow mesoporous nano silicon dioxide spheres;

5-10 components of a lubricant;

1-5 components of a compatilizer;

1-2 components of age resister.

2. The abrasion resistant nylon material of claim 1,

the nylon 56 component;

a glass fiber 30 component;

3, preparing hollow mesoporous nano silicon dioxide spheres;

a lubricant 7 component;

a compatilizer 3 component;

and (4) anti-aging agent 1.

3. The abrasion resistant nylon material of claim 1, wherein the lubricant comprises an ionic liquid and polytetrafluoroethylene.

4. The abrasion resistant nylon material of claim 3, wherein the ionic liquid to polytetrafluoroethylene component ratio is 5:2.

5. the abrasion resistant nylon material of claim 1, wherein the glass fibers are oval in cross-section.

6. The abrasion resistant nylon material of claim 1, wherein the glass fibers have a density of 2.4-2.6g/cm ³ 。

7. The abrasion resistant nylon material of claim 1, wherein the compatibilizer comprises maleic anhydride grafted POE, maleic anhydride grafted PE, or maleic anhydride grafted EPDM.

8. The abrasion resistant nylon material of claim 1, wherein the hollow mesoporous nano silica spheres have a diameter of 0.5-3um;

the diameter of the mesopores of the hollow mesoporous nano silicon dioxide spheres is 20-50 nanometers.

9. The preparation method of the wear-resistant nylon material is characterized by comprising the following steps:

melting nylon, and filling the melted nylon into the hollow mesoporous nano silicon dioxide spheres;

mixing and heating the hollow mesoporous nano-silica spheres filled with nylon, glass fibers, a lubricant, a compatilizer and an anti-aging agent, and kneading the mixture for at least 10min by using a kneader to obtain a mixture;

carrying out melt extrusion on the obtained mixture through a double-screw extruder to obtain composite particles;

and cooling and drying the composite particles to obtain the wear-resistant nylon material.

10. The method for preparing the abrasion-resistant nylon material as claimed in claim 6, wherein the mixing and heating temperature is 210-220 ℃.