CN113502006A

CN113502006A - Nano composite rubber and preparation method thereof

Info

Publication number: CN113502006A
Application number: CN202110780419.3A
Authority: CN
Inventors: 李金春; 黎园; 孙向南; 王辉; 吴明生; 刘伟; 李琳; 张瑞; 赵帅; 侯苏丹
Original assignee: Jiangsu Yunrui Automotive Electrical System Co ltd
Current assignee: Jiangsu Yunrui Automotive Electrical System Co ltd
Priority date: 2021-07-09
Filing date: 2021-07-09
Publication date: 2021-10-15

Abstract

The invention relates to a nano composite rubber and a preparation method thereof, wherein the nano composite rubber comprises the following raw materials: 100 parts by mass of rubber, 1-50 parts by mass of a nanocarbon material, 2-20 parts by mass of a polymer and 0.01-10 parts by mass of a surfactant. Firstly, preparing polymer modified nano filler under the assistance of a certain concentration of surfactant; then, dispersing the nano filler into a rubber solution with a certain mass ratio to prepare the rubber strip with enhanced weather resistance. The rubber strip provided by the invention can be used for manufacturing automobile wipers, spacecraft sealing rings and the like.

Description

Nano composite rubber and preparation method thereof

Technical Field

The invention belongs to the field of rubber manufacturing, and particularly relates to nano composite rubber and a preparation method thereof.

Background

The rubber product plays an extremely important role in modern production, aerospace military industry and daily life, and the processability, mechanical property and weather resistance of the rubber product are closely related to the matrix components and chemical structures. Chemical/physical modification has become a major point in rubber development due to the poor stability of the rubber building blocks. However, the conventional modifier has large microscopic size and poor compatibility with a matrix material, so that the rubber products produced at present generally have the problem of poor weather resistance.

The nano material has small microscopic size and good dispersibility in the rubber matrix material; the surface energy is large, and the strong interaction can be formed with the matrix material. Therefore, the nanometer material used as the modifier can effectively overcome the defects of the traditional modifier and has great advantages in enhancing the rubber performance. At present, no report is available for the products.

Disclosure of Invention

Aiming at the current situation, the invention provides the nano composite rubber and the preparation method thereof, so that the mechanical strength and the weather resistance are improved.

The invention is realized by the following technical scheme: a nanocomposite rubber characterized by: the composite material comprises the following raw materials in parts by mass: 100 parts by mass of rubber, 1-50 parts by mass of a nanocarbon material, 2-20 parts by mass of a polymer and 0.01-10 parts by mass of a surfactant.

Preferably, the rubber is one or more of chloroprene rubber, styrene-butadiene rubber, nitrile rubber and hydrogenated nitrile rubber.

Preferably, the nano-carbon material is one or more of carbon nanotube, fullerene, graphene and graphite alkyne.

Preferably, the polymer is one or more of P3HT, PANI, PPY, P13.

Preferably, the surfactant is one or more of sodium dodecyl benzene sulfonate, tetrabutylammonium bromide and N-methyl pyrrolidone.

A preparation method of the nano composite rubber,

1) adding a polymer, a surfactant and a nano filler into acetone, and stirring to obtain the nano filler;

2) adding rubber into acetone, and stirring to obtain a rubber solution;

3) mixing and stirring the solutions prepared in the steps 1) and 2) according to the volume ratio of 1:5 to prepare the nano composite rubber.

Preferably, the temperature in the step 1) is 40-60 ℃, the rotating speed is 4000-6000 r/min, and the stirring time is 8-15 h.

Preferably, the medium temperature is 40-60 ℃, the rotating speed is 4000-6000 r/min, and the stirring time is 10-18 h.

Preferably, the temperature in the step 3) is 40-80 ℃, the rotating speed is 6000-10000 r/min, and the stirring time is 2-8 h.

The invention has the beneficial effects that: compared with the prior art, the nano material is used as the additive, so that the interaction between the filler and the base material can be effectively enhanced, and the nano material can be used as the base material of the automobile windshield wiper and can obviously improve the mechanical strength and the weather resistance of the automobile windshield wiper.

Drawings

FIG. 1 is a structural illustration of a nanocomposite rubber provided by the present invention;

FIG. 2 is a schematic representation of the molecular structure of a polymer used in the present invention;

FIG. 3 is an SEM image of polymer modified carbon nanotubes provided by an embodiment of the invention;

FIG. 4 is an SEM image of a nanocomposite rubber provided by an embodiment of the invention.

FIG. 4a is a scanning electron microscope image of a composite rubber wiper blade with carbon nanotubes as the nano filler after being bent 50 ten thousand times.

FIG. 4b is a scanning electron microscope image of a composite rubber wiper blade filled with polymer modified carbon nanotubes after being bent 50 ten thousand times.

In the figure: the material is matrix material, carbon nanotube and polymer.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Comparative example 1:

the invention provides a nano composite rubber and a preparation method thereof, and the nano composite rubber provided by the invention comprises the following components: 100 parts of nitrile rubber/hydrogenated nitrile rubber, 20 parts of carbon nano tube and 5 parts of sodium dodecyl benzene sulfonate. The nano composite rubber is prepared by the following steps:

1) adding the carbon nano tube and sodium dodecyl benzene sulfonate into 100 parts by mass of acetone according to the mass ratio of 4:1 at 42 ℃ and 4300 r/min, and stirring for 8 hours to obtain a nano filler;

2) under the conditions of 55 ℃ and 4500 r/min, adding the nitrile rubber/hydrogenated nitrile rubber into 200 parts by mass of acetone according to the mass ratio of 1:1, and stirring for 13 hours to prepare a nitrile rubber/hydrogenated nitrile rubber solution;

3) mixing the solutions prepared in 1) and 2) according to the volume ratio of 1:5, and stirring for 12 h at the temperature of 60 ℃ and 6500 r/min to prepare the nano composite rubber.

In fig. 4a, the wiper made of the nanocomposite rubber shows less fine cracks at the swing arm after 50 ten thousand bending than the nitrile rubber/hydrogenated nitrile rubber wiper without the nano filler modification treatment.

Example 1:

as shown in fig. 1 and 2, a nanocomposite rubber is divided into: 100 parts of nitrile rubber/hydrogenated nitrile rubber, 20 parts of carbon nano tube, 1320 parts of P and 5 parts of sodium dodecyl benzene sulfonate. The nano composite rubber is prepared by the following steps:

1) adding P13, the carbon nano tube and sodium dodecyl benzene sulfonate into 100 parts by mass of acetone according to the mass ratio of 1:4:1 at 42 ℃ and 4300 r/min, and stirring for 1 h to prepare the nano filler;

2) under the conditions of 55 ℃ and 4500 r/min, adding the nitrile rubber/hydrogenated nitrile rubber into 200 parts by mass of acetone according to the mass ratio of 1:1, and stirring for 8 hours to prepare a nitrile rubber/hydrogenated nitrile rubber solution;

As shown in fig. 3 and 4b, the wiper blade made of the nanocomposite rubber showed no occurrence of fine cracks at the oscillating arm of the example after 50 ten thousand bending cycles.

Claims

1. A nanocomposite rubber characterized by: the composite material comprises the following raw materials in parts by mass: 100 parts by mass of rubber, 1-50 parts by mass of a nanocarbon material, 2-20 parts by mass of a polymer and 0.01-10 parts by mass of a surfactant.

2. The nanocomposite rubber according to claim 1, wherein the rubber is one or more of chloroprene rubber, styrene-butadiene rubber, nitrile rubber and hydrogenated nitrile rubber.

3. The nanocomposite rubber according to claim 1, wherein the nanocarbon material is one or more of carbon nanotubes, fullerenes, graphene and graphdines.

4. The nanocomposite rubber according to claim 1, wherein the polymer is one or more of P3HT, PANI, PPY, and P13.

5. The nanocomposite rubber according to claim 1, wherein the surfactant is one or more of sodium dodecylbenzene sulfonate, tetrabutylammonium bromide and N-methylpyrrolidone.

6. The method for preparing a nanocomposite rubber according to claims 1 to 5, wherein the method comprises the following steps:

2) adding rubber into acetone, and stirring to obtain a rubber solution;

7. The method for preparing a nanocomposite rubber according to claim 6, wherein: the temperature in the step 1) is 40-60 ℃, the rotating speed is 4000-6000 r/min, and the stirring time is 8-15 h.

8. The method for preparing a nanocomposite rubber according to claim 6, wherein: the temperature in the step 2) is 40-60 ℃, the rotating speed is 4000-6000 r/min, and the stirring time is 10-18 h.

9. The method for preparing a nanocomposite rubber according to claim 6, wherein: the temperature in the step 3) is 40-80 ℃, the rotating speed is 6000-10000 r/min, and the stirring time is 2-8 h.