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Preparation of stripping-off liquid rubber/organic clay nano composite material under temperate conditions

A technology of nano-composite materials and liquid rubber, which is applied in the field of exfoliated liquid rubber/organic clay nano-composites, which can solve problems such as harm to the human body and the environment, affect the performance of composite materials, increase dust pollution, etc., and achieve excellent performance and production efficiency High, easy-to-operate effect

Inactive Publication Date: 2008-01-30
NANKAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the amount of organic solvent used in this invention is small, it is still harmful to the human body and the environment.
Chinese patent CN 1079409C reports the use of rubber emulsion and clay water suspension to mix, and then add demulsification, coagulation agent to prepare rubber / clay composite material, there are still many processes, and the problem of using multiple solvents at the same time
[0006] The clay of organic modification is directly mixed in the polymer of fusion, the method for preparing polymer / clay composite material also has report (CN1247206A), but because what use is the clay powder of organic cation intercalation, for the equipment and technology of composite material processing There are relatively strict requirements, such as proper matching of the screw length-to-width ratio, rotation speed, and processing temperature of the extruder. Generally speaking, the clay in the obtained composite material is not completely uniformly dispersed in the form of nanosheets. In polymers, affects the performance of composite materials
At the same time, due to the use of clay powder, the dust pollution in the process of processing is increased

Method used

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  • Preparation of stripping-off liquid rubber/organic clay nano composite material under temperate conditions
  • Preparation of stripping-off liquid rubber/organic clay nano composite material under temperate conditions
  • Preparation of stripping-off liquid rubber/organic clay nano composite material under temperate conditions

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Preparation of organically modified montmorillonite OM1: Add 10 grams of inorganic montmorillonite with a cation exchange capacity of 80meq / 100g, add 500 grams of water, and stir at high speed for 30 minutes after being uniformly dispersed to obtain a stable suspension; Octadecyltrimethylammonium bromide was dissolved in 100 grams of water to make a solution; the above suspension was heated to 80-90°C, and the above solution was slowly added dropwise, while stirring for 8 hours, naturally cooled to room temperature, and then suction filtered. And washed with water for many times, no bromide ion was detected by using 0.2% silver nitrate solution, and dried to obtain organically modified montmorillonite. Its X-ray diffraction spectrum is shown in Figure 1, and the diffraction peak at 2θ of about 3.97° indicates that the interlayer spacing of the organically modified montmorillonite is 2.3nm.

[0033] 10 grams of this organically modified montmorillonite, and 90 grams of l...

Embodiment 2

[0035]Preparation of organically modified montmorillonite OM2: Add 10 grams of inorganic montmorillonite with a cation exchange capacity of 80meq / 100g, add 500 grams of water, and stir at high speed for 30 minutes after being uniformly dispersed to obtain a stable suspension; 6.5 grams Dioctadecyldimethylammonium bromide was dissolved in 100 grams of water to make a solution; the above suspension was heated to 80-90°C, and the above solution was slowly added dropwise, while stirring for 8 hours, naturally cooled to room temperature, and then suction filtered , and washed with water several times, with 0.2% silver nitrate solution to detect no bromide ions, and dry to obtain organically modified montmorillonite. Its X-ray diffraction spectrum is shown in Figure 2, and the diffraction peak at 2θ of about 2.49° indicates that the interlayer spacing of the organically modified montmorillonite is 3.6nm.

[0036] 10 grams of this organically modified montmorillonite, and 90 grams of...

Embodiment 3

[0038] Preparation of organically modified montmorillonite OM1: Add 10 grams of inorganic montmorillonite with a cation exchange capacity of 80meq / 100g, add 500 grams of water, and stir at high speed for 30 minutes after being uniformly dispersed to obtain a stable suspension; Octadecyltrimethylammonium bromide was dissolved in 100 grams of water to make a solution; the above suspension was heated to 80-90°C, and the above solution was slowly added dropwise, while stirring for 8 hours, naturally cooled to room temperature, and then suction filtered. And washed with water for many times, no bromide ion was detected by using 0.2% silver nitrate solution, and dried to obtain organically modified montmorillonite. Its X-ray diffraction spectrum is shown in Figure 1, and the diffraction peak at 2θ of about 3.97° indicates that the interlayer spacing of the organically modified montmorillonite is 2.3nm.

[0039] 10 grams of organically modified montmorillonite and 90 grams of liquid ...

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PUM

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Abstract

The invention provides a novel exfoliated liquid rubber / organic clay nano composite material and a preparation method thereof. The raw materials comprises (by weight): liquid rubber 90-99.8 percent and organic modified clay 0.2-10 percent, wherein the liquid rubber is liquid carboxyl terminated polybutadiene rubber. The status of the clay layers in the liquid rubber can be peeled off and dispersive. The preparation method provided by the invention has simple operation, no need of heating or organic solvent, high production efficiency, thereby being easy for industrialization production. The exfoliated liquid rubber / organic clay nano composite material prepared by the invention can also be used as extender for strengthening performance of other polymer materials besides being used for preparing polyurethane materials with better performance.

Description

Technical field [0001] The invention relates to a peeling liquid rubber / organoclay nanocomposite material, more specifically a peeling-off liquid rubber / organoclay nanocomposite prepared by using an organic modifier modified organoclay under mild (room temperature, no high-speed stirring and solvent) conditions. Liquid rubber / organoclay nanocomposites. Background technique [0002] Polymer / layered clay nanocomposites are a research hotspot in the field of nanocomposites. Since clay is dispersed in the polymer in the form of nanosheets, this type of composite material has good mechanical properties, higher heat resistance, and It has better gas barrier and flame retardant properties, and has broad industrial application prospects. In this composite material, the dispersion state of clay in the polymer has an important influence on its properties. [0003] The dispersion forms of clay in the polymer matrix are common compound type, intercalation type and exfoliation type. F...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L47/00C08K9/04
Inventor 陈铁红朱建君孙平川李宝会丁大同
Owner NANKAI UNIV
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