A wear-resistant nylon composite material and its preparation method

Abstract

The present invention relates to the technical field of nylon composite material preparation, and specifically discloses a wear-resistant nylon composite material and a preparation method thereof. The wear-resistant nylon composite material comprises the following raw material components in parts by weight: 80-120 parts of nylon; 20-40 parts of carbon fiber; 30-50 parts of wear-resistant agent; 0.5-1 part of coupling agent; 1-3 parts of dispersant. By adding the wear-resistant agent hexagonal boron nitride to the wear-resistant nylon composite material, the nylon composite material has certain wear resistance; in addition, by adding modified hexagonal boron nitride obtained by the method described in the present invention as a wear-resistant agent to the wear-resistant nylon composite material, compared with adding unmodified hexagonal boron nitride, the wear resistance of the prepared wear-resistant nylon composite material can be further greatly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of nylon composite material preparation, and particularly relates to a wear-resistant nylon composite material and a preparation method thereof. Background Art

[0002] Polyamide, commonly known as nylon, is a general term for thermoplastic resins with repeating amide groups —[NHCO]— in the main molecular chain; due to the non-toxic, light weight, excellent mechanical strength and other characteristics of polyamide, it has been widely used in industries such as machinery, chemical industry, instrumentation, and automobiles.

[0003] In addition, in order to meet various functional requirements, different functional fillers can usually be added to nylon to achieve this. For example, Chinese Invention Patent 201110062134.2 discloses an electromagnetic shielding nylon composite material, which is composed of the following components in parts by mass: 60 - 70 parts of nylon 610; 25 - 35 parts of carbon fiber; 0.5 - 1.5 parts of coupling agent; 0 - 5 parts of other additives. The prepared electromagnetic shielding nylon composite material of this invention has excellent electromagnetic shielding effect. Although this composite material has excellent electromagnetic shielding effect, its wear resistance needs to be further improved. Summary of the Invention

[0004] In order to overcome at least one of the technical problems existing in the prior art, the present invention first provides a wear-resistant nylon composite material.

[0005] The technical solution of the present invention is as follows:

[0006] A wear-resistant nylon composite material, which comprises the following raw material components in parts by weight:

[0007] 80 - 120 parts of nylon; 20 - 40 parts of carbon fiber; 30 - 50 parts of wear-resistant agent; 0.5 - 1 part of coupling agent; 1 - 3 parts of dispersant.

[0008] By adding a wear-resistant agent to the wear-resistant nylon composite material of the present invention, the nylon composite material has a certain wear-resistant effect.

[0009] Preferably, the wear-resistant nylon composite material comprises the following raw material components in parts by weight:

[0010] 80 - 100 parts of nylon; 30 - 40 parts of carbon fiber; 40 - 50 parts of wear-resistant agent; 0.5 - 1 part of coupling agent; 1 - 2 parts of dispersant.

[0011] Preferably, the wear-resistant nylon composite material comprises the following raw material components in parts by weight:

[0012] 90 parts of nylon; 30 parts of carbon fiber; 40 parts of wear-resistant agent; 1 part of coupling agent; 2 parts of dispersant.

[0013] Preferably, the wear-resistant agent is hexagonal boron nitride.

[0014] Preferably, the wear-resistant agent is modified hexagonal boron nitride.

[0015] Preferably, the modified hexagonal boron nitride is prepared by the following method:

[0016] (1) Take hexagonal boron nitride and sodium chloride and mix them evenly, then calcine at 1000 - 1200 °C for 30 min - 60 min to obtain a calcined mixture;

[0017] (2) Mix the calcined mixture with the modification liquid evenly, and then remove the solvent and dry it to obtain the modified flame retardant filler.

[0018] The inventors found in the research that adding the modified hexagonal boron nitride obtained by the above method as a wear-resistant agent in the wear-resistant nylon composite material can further significantly improve the wear resistance of the prepared wear-resistant nylon composite material compared with adding unmodified hexagonal boron nitride.

[0019] Preferably, in step (1), the weight ratio of hexagonal boron nitride to sodium chloride is 8 - 12:1.

[0020] Most preferably, in step (1), the weight ratio of hexagonal boron nitride to sodium chloride is 10:1.

[0021] Preferably, the weight ratio of the calcined mixture to the modification liquid is 1:1.5 - 2.5.

[0022] Most preferably, the weight ratio of the calcined mixture to the modification liquid is 1:2.

[0023] Preferably, the modification liquid refers to an ethanol aqueous solution containing nonylphenol polyoxyethylene ether (NP-10) and sodium lignosulfonate.

[0024] The inventors found in the research that the addition of the modification components in the modification liquid is very crucial; research shows that only the modified hexagonal boron nitride obtained by modifying with an ethanol aqueous solution containing both nonylphenol polyoxyethylene ether (NP-10) and sodium lignosulfonate can further significantly improve the wear resistance of the prepared wear-resistant nylon composite material compared with unmodified hexagonal boron nitride; however, the modified hexagonal boron nitride obtained by modifying only with an ethanol aqueous solution containing only nonylphenol polyoxyethylene ether (NP-10) or only with an ethanol aqueous solution containing only sodium lignosulfonate cannot further significantly improve the wear resistance of the prepared wear-resistant nylon composite material.

[0025] Preferably, the mass fraction of nonylphenol polyoxyethylene ether (NP-10) in the ethanol aqueous solution is 1 - 3%.

[0026] Most preferably, the mass fraction of nonylphenol polyoxyethylene ether (NP-10) in the ethanol aqueous solution is 2%.

[0027] Preferably, the mass fraction of sodium lignosulfonate in the ethanol aqueous solution is 1-3%.

[0028] Preferably, the mass fraction of sodium lignosulfonate in the ethanol aqueous solution is 2%.

[0029] Preferably, the ethanol aqueous solution refers to an ethanol aqueous solution with a volume fraction of 50-70%.

[0030] The present invention also provides a preparation method of a wear-resistant nylon composite material, which comprises the following steps:

[0031] After mixing nylon, carbon fiber, wear-resistant agent, coupling agent and dispersant evenly, the wear-resistant nylon composite material is obtained by extrusion granulation with a twin-screw extruder.

[0032] Beneficial effects: The present invention provides a wear-resistant nylon composite material with a brand-new composition; by adding the wear-resistant agent hexagonal boron nitride to the wear-resistant nylon composite material, the nylon composite material has certain wear resistance; in addition, by adding the modified hexagonal boron nitride obtained by the method of the present invention as a wear-resistant agent to the wear-resistant nylon composite material, compared with adding unmodified hexagonal boron nitride, the wear resistance of the prepared wear-resistant nylon composite material can be further greatly improved. Specific embodiments

[0033] The following specific examples are used to further explain the present invention, but the examples do not limit the present invention in any form.

[0034] In the following examples, the nylon used is nylon 6 with the brand BL3200H produced by Yueyang Baling Petrochemical Co., Ltd. The rest of the raw materials without specified sources are conventional raw materials that can be obtained by those skilled in the art through conventional purchase channels; the above raw material sources of the present invention do not limit the protection scope of the present invention.

[0035] Example 1 Preparation of wear-resistant nylon composite material

[0036] Composition of raw materials by weight: 90 parts of nylon; 30 parts of carbon fiber; 40 parts of wear-resistant agent (hexagonal boron nitride); 1 part of coupling agent (kh560); 2 parts of dispersant (ethylene bisstearamide).

[0037] Preparation method: After mixing nylon, carbon fiber, wear-resistant agent, coupling agent and dispersant evenly, the wear-resistant nylon composite material is obtained by extrusion granulation with a twin-screw extruder.

[0038] Example 2 Preparation of wear-resistant nylon composite material

[0039] The raw material weight parts composition: 90 parts of nylon; 30 parts of carbon fiber; 40 parts of wear-resistant agent; 1 part of coupling agent (kh560); 2 parts of dispersant (ethylene bisstearamide).

[0040] The wear-resistant agent is modified hexagonal boron nitride;

[0041] The modified hexagonal boron nitride is prepared by the following method:

[0042] (1) Take hexagonal boron nitride and sodium chloride with a weight ratio of 10:1, mix them evenly, and then calcine at 1100 °C for 40 min to obtain a calcined mixture;

[0043] (2) Mix the calcined mixture evenly with the modification liquid, and then remove the solvent and dry to obtain the modified flame retardant filler;

[0044] In step (2), the weight ratio of the calcined mixture to the modification liquid is 1:2; the modification liquid refers to an ethanol aqueous solution containing nonylphenol polyoxyethylene ether (NP-10) and sodium lignosulfonate; among them, the mass fraction of nonylphenol polyoxyethylene ether (NP-10) in the ethanol aqueous solution is 2%; the mass fraction of sodium lignosulfonate in the ethanol aqueous solution is 2%; the ethanol aqueous solution refers to an ethanol aqueous solution with a volume fraction of 60%.

[0045] Preparation method: Mix nylon, carbon fiber, wear-resistant agent, coupling agent and dispersant evenly, and then extrude and pelletize through a twin-screw extruder to obtain the wear-resistant nylon composite material.

[0046] Preparation of the wear-resistant nylon composite material in Example 3

[0047] The raw material weight parts composition: 80 parts of nylon; 40 parts of carbon fiber; 30 parts of wear-resistant agent; 0.5 part of coupling agent (kh560); 1 part of dispersant (ethylene bisstearamide).

[0048] The wear-resistant agent is modified hexagonal boron nitride;

[0049] The modified hexagonal boron nitride is prepared by the following method:

[0050] (2) Take hexagonal boron nitride and sodium chloride with a weight ratio of 12:1, mix them evenly, and then calcine at 1000 °C for 60 min to obtain a calcined mixture;

[0051] (2) Mix the calcined mixture evenly with the modification liquid, and then remove the solvent and dry to obtain the modified flame retardant filler;

[0052] In step (2), the weight ratio of the calcined mixture to the modification liquid is 1:1.5; the modification liquid refers to an ethanol aqueous solution containing nonylphenol polyoxyethylene ether (NP-10) and sodium lignosulfonate; wherein, the mass fraction of nonylphenol polyoxyethylene ether (NP-10) in the ethanol aqueous solution is 3%; the mass fraction of sodium lignosulfonate in the ethanol aqueous solution is 1%; the ethanol aqueous solution refers to an ethanol aqueous solution with a volume fraction of 70%.

[0053] Preparation method: Mix nylon, carbon fiber, wear-resistant agent, coupling agent and dispersant evenly, and then extrude and pelletize through a twin-screw extruder to obtain the wear-resistant nylon composite material.

[0054] Preparation of wear-resistant nylon composite material in Example 4

[0055] Composition by weight of raw materials: 120 parts of nylon; 20 parts of carbon fiber; 50 parts of wear-resistant agent; 1 part of coupling agent (kh560); 3 parts of dispersant (ethylene bisstearamide).

[0056] The wear-resistant agent is modified hexagonal boron nitride;

[0057] The modified hexagonal boron nitride is prepared by the following method:

[0058] (3) Mix hexagonal boron nitride and sodium chloride with a weight ratio of 8:1 evenly, and then calcine at 1200 °C for 30 min to obtain a calcined mixture;

[0059] (2) Mix the calcined mixture with the modification liquid evenly, and then remove the solvent and dry to obtain the modified flame retardant filler;

[0060] In step (2), the weight ratio of the calcined mixture to the modification liquid is 1:2.5; the modification liquid refers to an ethanol aqueous solution containing nonylphenol polyoxyethylene ether (NP-10) and sodium lignosulfonate; wherein, the mass fraction of nonylphenol polyoxyethylene ether (NP-10) in the ethanol aqueous solution is 1%; the mass fraction of sodium lignosulfonate in the ethanol aqueous solution is 3%; the ethanol aqueous solution refers to an ethanol aqueous solution with a volume fraction of 50%.

[0061] Preparation method: Mix nylon, carbon fiber, wear-resistant agent, coupling agent and dispersant evenly, and then extrude and pelletize through a twin-screw extruder to obtain the wear-resistant nylon composite material.

[0062] Preparation of wear-resistant nylon composite material in Comparative Example 1

[0063] Composition by weight of raw materials: 90 parts of nylon; 30 parts of carbon fiber; 40 parts of wear-resistant agent; 1 part of coupling agent (kh560); 2 parts of dispersant (ethylene bisstearamide).

[0064] The wear-resistant agent described is modified hexagonal boron nitride;

[0065] The modified hexagonal boron nitride described is prepared by the following method:

[0066] (4) Take hexagonal boron nitride and sodium chloride with a weight ratio of 10:1, mix them evenly, and then calcine at 1100 °C for 40 min to obtain a calcined mixture;

[0067] (2) Mix the calcined mixture evenly with the modification liquid, and then remove the solvent and dry it to obtain the modified flame-retardant filler;

[0068] In step (2), the weight ratio of the calcined mixture to the modification liquid is 1:2; the modification liquid refers to an ethanol aqueous solution containing nonylphenol polyoxyethylene ether (NP-10); among them, the mass fraction of nonylphenol polyoxyethylene ether (NP-10) in the ethanol aqueous solution is 4%; the ethanol aqueous solution refers to an ethanol aqueous solution with a volume fraction of 60%.

[0069] Preparation method: Mix nylon, carbon fiber, wear-resistant agent, coupling agent, and dispersant evenly, and then extrude and pelletize through a twin-screw extruder to obtain the wear-resistant nylon composite material.

[0070] Preparation of the wear-resistant nylon composite material in Comparative Example 2

[0071] Composition of raw materials in parts by weight: 90 parts of nylon; 30 parts of carbon fiber; 40 parts of wear-resistant agent; 1 part of coupling agent (kh560); 2 parts of dispersant (ethylene bisstearamide).

[0072] The wear-resistant agent described is modified hexagonal boron nitride;

[0073] The modified hexagonal boron nitride described is prepared by the following method:

[0074] (5) Take hexagonal boron nitride and sodium chloride with a weight ratio of 10:1, mix them evenly, and then calcine at 1100 °C for 40 min to obtain a calcined mixture;

[0075] (2) Mix the calcined mixture evenly with the modification liquid, and then remove the solvent and dry it to obtain the modified flame-retardant filler;

[0076] In step (2), the weight ratio of the calcined mixture to the modification liquid is 1:2; the modification liquid refers to an ethanol aqueous solution containing sodium lignosulfonate; among them, the mass fraction of sodium lignosulfonate in the ethanol aqueous solution is 4%; the ethanol aqueous solution refers to an ethanol aqueous solution with a volume fraction of 60%.

[0077] Preparation method: Mix nylon, carbon fiber, wear-resistant agent, coupling agent, and dispersant evenly, and then extrude and pelletize through a twin-screw extruder to obtain the wear-resistant nylon composite material.

[0078] The wear-resistant nylon composites prepared in Examples 1 to 4 and Comparative Examples 1 to 2 were made into specimens with dimensions of 30 mm × 7 mm × 6 mm; then, the wear amount was tested according to the method in the GB3960 standard, and the test results are shown in Table 1.

[0079] Table 1. Wear resistance test of the wear-resistant nylon composite of the present invention

[0080] Wear amount Wear-resistant nylon composite material prepared in Example 1 0.54mg Wear-resistant nylon composite material prepared in Example 2 0.09mg Wear-resistant nylon composite material prepared in Example 3 0.14mg Wear-resistant nylon composite material prepared in Example 4 0.12mg Wear-resistant nylon composite material prepared in Comparative Example 1 0.41mg Wear-resistant nylon composite material prepared in Comparative Example 2 0.44mg

[0081] It can be seen from the experimental data in Table 1 that the wear amount of the wear-resistant nylon composites prepared in Examples 2 to 4 is much smaller than that of the wear-resistant nylon composite prepared in Example 1; this shows that: adding the modified hexagonal boron nitride obtained by the method described in the present invention to the wear-resistant nylon composite, compared with adding unmodified hexagonal boron nitride; can further greatly improve the wear resistance of the prepared wear-resistant nylon composite.

[0082] It can be seen from the experimental data in Table 1 that the wear amount of the wear-resistant nylon composites prepared in Comparative Examples 1 and 2 is not significantly reduced compared with that of the wear-resistant nylon composite prepared in Example 1, and the reduction amplitude is much smaller than that of Example 2; this shows that: in the preparation process of the modified hexagonal boron nitride of the present invention, the addition of the modifying components in the modifying solution is very crucial; research shows that only the modified hexagonal boron nitride obtained by modifying with an ethanol aqueous solution containing both nonylphenol polyoxyethylene ether (NP-10) and sodium lignosulfonate can further greatly improve the wear resistance of the prepared wear-resistant nylon composite compared with unmodified hexagonal boron nitride; however, the modified hexagonal boron nitride obtained by modifying only with an ethanol aqueous solution containing only nonylphenol polyoxyethylene ether (NP-10) or only with an ethanol aqueous solution containing only sodium lignosulfonate cannot further greatly improve the wear resistance of the prepared wear-resistant nylon composite.

Claims

1. A wear-resistant nylon composite material, characterized in that, It contains the following raw material components in parts by weight: 80 - 120 parts of nylon; 20 - 40 parts of carbon fiber; 30 - 50 parts of wear-resistant agent; 0.5 - 1 part of coupling agent; 1 - 3 parts of dispersant; The wear-resistant agent is modified hexagonal boron nitride; the modified hexagonal boron nitride is prepared by the following method: (1) Take hexagonal boron nitride and sodium chloride and mix them evenly, then calcine at 1000 - 1200 °C for 30 min - 60 min to obtain a calcined mixture; (2) Mix the calcined mixture with the modification liquid evenly, then remove the solvent and dry to obtain the modified hexagonal boron nitride; The modification liquid refers to an ethanol aqueous solution containing nonylphenol polyoxyethylene ether and sodium lignosulfonate.

2. The wear-resistant nylon composite material according to claim 1, wherein, It contains the following raw material components in parts by weight: 80 - 100 parts of nylon; 30 - 40 parts of carbon fiber; 40 - 50 parts of wear-resistant agent; 0.5 - 1 part of coupling agent; 1 - 2 parts of dispersant.

3. The wear-resistant nylon composite material according to claim 1, characterized in that It contains the following raw material components in parts by weight: 90 parts of nylon; 30 parts of carbon fiber; 40 parts of wear-resistant agent; 1 part of coupling agent; 2 parts of dispersant.

4. The wear-resistant nylon composite material according to claim 1, wherein In step (1), the weight ratio of hexagonal boron nitride to sodium chloride is 8 - 12:

1.

5. The wear-resistant nylon composite material according to claim 1, wherein The weight ratio of the calcined mixture to the modification liquid is 1:1.5 - 2.

5.

6. The preparation method of the wear-resistant nylon composite material according to any one of claims 1 to 5, characterized in that, It includes the following steps: Mix nylon, carbon fiber, wear-resistant agent, coupling agent and dispersant evenly, and then extrude and pelletize with a twin-screw extruder to obtain the wear-resistant nylon composite material.