阅读说明：本技术 橡胶复合材料及其制备方法 (Rubber composite material and preparation method thereof ) 是由 赵海静 刘媛 董明 于 2019-10-24 设计创作，主要内容包括：一种橡胶复合材料及其制备方法,属于复合材料技术领域。该橡胶复合材料的制备方法包括以下步骤：S1,将碳纳米管分散液与胶乳混合均匀,得到碳纳米管-胶乳混合液；S2,将炭黑用高纯水浸润后,加入到碳纳米管-胶乳混合液中,持续搅拌至材料固化,得到碳黑-碳纳米管-橡胶；S3,将碳黑-碳纳米管-橡胶在双辊开炼机上反复薄通；S4,将薄通后的碳黑-碳纳米管-橡胶干燥,得到炭黑-碳纳米管-橡胶复合材料。本发明实现了碳纳米管、炭黑在橡胶中的均匀分散,且制备过程无废液产生,微波干燥效率高,减少了温度-时间对生胶性能的影响。(A rubber composite material and a preparation method thereof belong to the technical field of composite materials. The preparation method of the rubber composite material comprises the following steps: s1, uniformly mixing the carbon nanotube dispersion liquid with latex to obtain a carbon nanotube-latex mixed liquid; s2, soaking carbon black in high-purity water, adding the carbon black into the carbon nanotube-latex mixed solution, and continuously stirring until the material is solidified to obtain carbon black-carbon nanotube-rubber; s3, repeatedly passing the carbon black-carbon nanotube-rubber on a double-roller open mill; and S4, drying the thin carbon black-carbon nano tube-rubber to obtain the carbon black-carbon nano tube-rubber composite material. The invention realizes the uniform dispersion of the carbon nano tube and the carbon black in the rubber, has no waste liquid generated in the preparation process, has high microwave drying efficiency and reduces the influence of temperature-time on the rubber performance.)

1. The preparation method of the rubber composite material is characterized by comprising the following steps:

s1, uniformly mixing the carbon nanotube dispersion liquid with latex to obtain a carbon nanotube-latex mixed liquid;

s2, soaking carbon black in high-purity water, adding the carbon black into the carbon nanotube-latex mixed solution, and continuously stirring until the material is solidified to obtain carbon black-carbon nanotube-rubber;

s3, repeatedly passing the carbon black-carbon nanotube-rubber on a double-roller open mill;

and S4, drying the thin carbon black-carbon nano tube-rubber to obtain the carbon black-carbon nano tube-rubber composite material.

2. The method for preparing a rubber composite according to claim 1, wherein the carbon nanotube dispersion has a diameter of 50 to 200 nm and a length of 1 to 20 μm.

3. The method for preparing a rubber composite according to claim 1, wherein the latex comprises at least one of natural latex, synthetic latex, and artificial latex.

4. The method for preparing a rubber composite material according to claim 1, wherein the weight ratio of the carbon nanotubes to the dry rubber in the carbon nanotube-latex mixture is 1-20: 100.

5. the method for preparing a rubber composite material according to claim 1, wherein the carbon black is impregnated with high-purity water, and the weight ratio of the carbon black to the high-purity water is 1: 0.2-3.

6. The method for preparing a rubber composite material according to claim 1, wherein the weight ratio of the carbon black to the rubber dry rubber in the carbon black-carbon nanotube-rubber composite material is 10-70: 100.

7. the method for preparing a rubber composite material as claimed in claim 1, wherein the drying is performed by microwave drying at a frequency of 2450 MHz.

8. A rubber composite material, characterized in that it is obtained by the process according to any one of claims 1 to 7.

Technical Field

The invention relates to a technology in the field of composite materials, in particular to a rubber composite material and a preparation method thereof.

Background

Rubber is used as an important industrial raw material and strategic resource, and the rubber is mainly derived from natural latex and industrial synthesis. The quality of the dry rubber obtained after the latex is demulsified and dried affects the performance of the dry rubber. Although the practicability of high mechanical strength and service life can be achieved by adjusting the proportion of the reinforcing filler and other functional fillers in the formula, particularly the proportion of the carbon nanotube material to the rubber, the filler has small size and self-agglomeration phenomenon, and is difficult to uniformly disperse in the rubber, so that the realization of uniform dispersion and uniform and rapid drying of the filler in the rubber becomes the key for improving the performance of rubber products.

The preparation method of the Chinese patent application CN 201910278854.9-high-dispersibility carbon nanotube-based rubber composite material comprises the steps of dispersing carbon nanotubes and water-soluble polymers in water uniformly in an ultrasonic mode, stirring the dispersed carbon nanotubes and rubber latex uniformly, and then utilizing CaCl₂Demulsifying, drying and blending with other fillers to obtain the rubber composite material. Although this method can effectively solve the problem of dispersibility of carbon nanotubes, it does not improve the dispersion of the filler in the rubber. And CaCl is required to be added for rubber demulsification₂Reagent, the wastewater produced by demulsification contains CaCl₂And the environmental protection pressure is increased.

The present invention has been made to solve the above-mentioned problems occurring in the prior art.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides the rubber composite material and the preparation method thereof, which realize the uniform dispersion of the carbon nano tube and the carbon black in the rubber, have no waste liquid generated in the preparation process, have high microwave drying efficiency and reduce the influence of temperature-time on the rubber performance.

The invention relates to a preparation method of a rubber composite material, which comprises the following steps:

s1, uniformly mixing the carbon nanotube dispersion liquid with latex to obtain a carbon nanotube-latex mixed liquid;

s2, soaking carbon black in high-purity water, adding the carbon black into the carbon nanotube-latex mixed solution, and continuously stirring until the material is solidified to obtain carbon black-carbon nanotube-rubber;

s3, repeatedly passing the carbon black-carbon nanotube-rubber on a double-roller open mill;

and S4, drying the thin carbon black-carbon nano tube-rubber to obtain the carbon black-carbon nano tube-rubber composite material.

Preferably, the carbon nanotube dispersion has a carbon nanotube diameter of 50 to 200 nm and a length of 1 to 20 μm.

Preferably, the latex includes, but is not limited to, one or more of natural latex, synthetic latex, artificial latex, and the like.

Preferably, the weight ratio of the carbon nanotubes to the dry glue in the carbon nanotube-latex mixed solution is 1-20: 100.

preferably, the carbon black is impregnated with high-purity water, and the weight ratio of the carbon black to the high-purity water is 1: 0.2-3.

Preferably, the weight ratio of the carbon black to the rubber dry glue in the carbon black-carbon nanotube-rubber composite material is 10-70: 100.

preferably, the drying is microwave drying, and the microwave drying frequency is 2450 MHz.

The invention relates to a rubber composite material prepared by the method.

Technical effects

Compared with the prior art, the preparation method is simple, no waste liquid is generated, the microwave drying efficiency is high, and the influence of temperature-time on the degumming performance is reduced; the carbon nano tubes and the carbon black in the prepared carbon black-carbon nano tube-rubber composite material are not agglomerated, and the uniform dispersion of the carbon nano tubes and the carbon black in the rubber is realized.

Drawings

FIG. 1a is an SEM photograph of the carbon black-carbon nanotube-rubber composite prepared in example 1;

FIG. 1b is an SEM photograph of the carbon black-carbon nanotube-rubber composite prepared in example 1;

fig. 2 is an SEM photograph of the carbon black-carbon nanotube-rubber composite prepared in example 2.

Detailed Description

The invention is described in detail below with reference to the drawings and the detailed description.