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Diatomite/nylon-6 composite material and preparation method thereof

A composite material and diatomite technology, which is applied in the field of plastic filling and modification, can solve the problems of low impact strength and poor dimensional stability, and achieve the effects of improving strength, high surface free energy and high adsorption.

Active Publication Date: 2015-10-14
BEIJING UNIV OF CHEM TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although polyamide has many advantages and is widely used, due to its strong water absorption due to the large amount of amide groups, the product has poor dimensional stability and low impact strength in dry state or low temperature, these shortcomings limit its application.

Method used

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  • Diatomite/nylon-6 composite material and preparation method thereof
  • Diatomite/nylon-6 composite material and preparation method thereof
  • Diatomite/nylon-6 composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] This comparative example is composed of the following raw materials in terms of weight percentage: 95% of nylon-6, 5% of surface-treated diatomite, and the total amount of raw materials is 100%. The twin-screw extruder used has a diameter of 25cm, an aspect ratio of 32:1, a rotational speed of 210r / min, and a processing temperature of 230°C in the first zone, 235°C in the second zone, 240°C in the third zone, 245°C in the fourth zone, and 240 °C in the head. ℃.

[0056] The diatomite / nylon-6 composite material of this example was prepared according to the above preparation method.

Embodiment 2

[0058] This comparative example is composed of the following raw materials in terms of weight percentage: nylon-6 is 90%, surface-treated diatomite is 10%, and the total amount of raw materials is 100%. The twin-screw extruder used has a diameter of 25cm, an aspect ratio of 32:1, a rotational speed of 210r / min, and a processing temperature of 230°C in the first zone, 235°C in the second zone, 240°C in the third zone, 245°C in the fourth zone, and 240 °C in the head. ℃.

[0059] The diatomite / nylon-6 composite material of this example was prepared according to the above preparation method.

Embodiment 3

[0061] This comparative example is composed of the following raw materials in terms of weight percentage: nylon-6 is 85%, surface-treated diatomite is 15%, and the total amount of raw materials is 100%. The twin-screw extruder used has a diameter of 25cm, an aspect ratio of 32:1, a rotational speed of 210r / min, and a processing temperature of 230°C in the first zone, 235°C in the second zone, 240°C in the third zone, 245°C in the fourth zone, and 240 °C in the head. ℃.

[0062] The diatomite / nylon-6 composite material of this example was prepared according to the above preparation method.

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Abstract

The invention discloses a diatomite / nylon-6 composite material and a preparation method thereof, and belongs to the field of plastic filling modification. The composite material is composed of 70 to 95% of nylon-6 and 5 to 30% of diatomite; wherein the particle size of diatomite is 5 to 40 [mu]m, and the diatomite is processed by a surfactant. The preparation method comprises the following steps: drying diatomite, processing the dried diatomite by a surfactant through a dry-process technology, wherein the surfactant accounts for 0.2 to 1 wt% of the weight of diatomite; pre-mixing nylon-6 and processed diatomite according to a certain formula, adding the premix into a double screw extruder, mixing, cooling by water, and granulating to obtain the composite material. The nylon-6 is modified by filling diatomite, the strength, modulus, toughness, and thermal deformation temperature of nylon-6 are all enhanced, the cost is reduced, the using amount of nylon-6 is reduced, the energy is saved, and the environment is protected. Moreover, the application range of diatomite is enlarged, and the utilization value of diatomite is increased.

Description

technical field [0001] The invention belongs to the field of plastic filling modification, and in particular relates to a natural biological sedimentary rock inorganic filler with a multi-level microporous structure. Background technique [0002] Polyamide, commonly known as nylon, is an engineering plastic with the longest history, the largest output, and the most widely used. Polyamide is a semi-crystalline polymer. The molecular chain contains a large number of polar amide groups. The polarity is strong. The hydrogen bond formed makes the force between the molecular chains very large. Therefore, it has strong mechanical strength. , high melting point, oil resistance, wear resistance, corrosion resistance, etc. With its excellent performance, it is widely used in automobiles, instrumentation, machinery industry, sports and leisure, daily consumer goods and other fields. There are many kinds of polyamides, including aliphatic PA6, PA66, PA11, 12, 610, 612, 1010, etc., as ...

Claims

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Application Information

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IPC IPC(8): C08L77/02C08K3/34C08K9/04C08K9/06
CPCC08K3/34C08K9/04C08K9/06C08L77/02
Inventor 乔辉张雯丁筠李志辉张相婷孙彦君
Owner BEIJING UNIV OF CHEM TECH
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