Process for preparing organic modified clay and styrene butadiene rubber nano composite material

A nano-composite material and styrene-butadiene rubber technology, which is applied in the field of preparing clay and styrene-butadiene rubber nano-composite materials, can solve problems such as no effect, and achieve the effects of increased tensile strength, less waste liquid, and reduced costs

Inactive Publication Date: 2007-01-24
BEIJING UNIV OF CHEM TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Compared with the styrene-butadiene rubber (tensile strength 13.0MPa, elongation at break 410%) containing 40 parts by weight of N550 carbon black prepared by the melt method, although the performance is slightly improved, there is no very obvious effect
In addition, a large amount of acidic flocculant is usually required in the flocculation process, and there is a waste liquid treatment problem in industrialization

Method used

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  • Process for preparing organic modified clay and styrene butadiene rubber nano composite material
  • Process for preparing organic modified clay and styrene butadiene rubber nano composite material
  • Process for preparing organic modified clay and styrene butadiene rubber nano composite material

Examples

Experimental program
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Effect test

Embodiment 1

[0037] Stir 500 g of natural sodium-based bentonite in 10 L of water, the stirring speed is 1600 rpm, and the time is 5 hours. After mixing evenly, let it stand for 96 hours to obtain a clay water suspension with a solid content of 1.82%. Dissolve 4 g of hexaalkyltrimethylammonium bromide in 100 milliliters of water to obtain an aqueous solution of the modifier; mix 550 g of the clay aqueous suspension with the aqueous modifier and stir at 70° C. for 30 minutes at a stirring speed of 600 rpm Minutes to obtain the clay / quaternary ammonium salt suspension; the clay / quaternary ammonium salt aqueous solution and 493g styrene-butadiene rubber latex (model 1502, solid content is 20.31%) were carried out stirring and mixing at room temperature for 10 minutes, and the stirring speed was 1600 rpm; Then 1% (mass) dilute sulfuric acid was added dropwise to carry out flocculation, and the final consumption of dilute sulfuric acid was 104 milliliters. Rinse the floc 10 times with clear wat...

Embodiment 2

[0040] The operating steps are the same as in Example 1. The clay and water suspension after being stirred for 5 hours were placed for 48 hours to obtain a clay suspension with a solid content of 2%; 5 g of modifier hexadecyltrimethylammonium bromide was dissolved in 100 ml of water to obtain a modifier The aqueous solution of above-mentioned clay aqueous suspension 500g and modifier aqueous solution are mixed; The amount of flocculant used is 100ml. Other processing conditions are with embodiment 1. The mechanical properties of the prepared composites are listed in Table 2. The results of the X-ray diffraction curve of the composite material are shown in Figure 5 (a).

Embodiment 3

[0042] The operating steps are the same as in Example 1. The clay and the water suspension after being stirred for 5 hours were placed for 25 hours to obtain a clay water suspension with a solid content of 2.2%; 1.0 g of modifier octadecyl vinyl dimethyl ammonium chloride was dissolved in 100 ml of water, The aqueous solution of the modifier was obtained; 455 g of the above-mentioned clay aqueous suspension was mixed with the aqueous modifier; the amount of the flocculant used was 100 ml. Other processing conditions are with embodiment 1. The mechanical properties of the prepared composites are listed in Table 2. The transmission electron micrographs of the composites are shown in figure 2 . It can be seen from the transmission electron microscope photos that in the styrene-butadiene rubber matrix, the thickness of the clay sheet is between 10nm and 20nm, and the dispersion is uniform and fine. In the styrene-butadiene rubber matrix, the distance between some clay sheets ...

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Abstract

The process of preparing nanometer composite material of organically modified clay and styrene butadiene rubber includes the first mixing organic modifier aqua and water clay suspension, the subsequent mixing with styrene butadiene latex, demulsifying and flocculating, drying, pugging and final vulcanizing to obtain the composite material. The organic modifier is alkyl ammonium salt and has the weight ratio to the clay of 0.1-0.5. The composite material has large rubber molecule entering the clay lamella to form obvious intercalation, nanometer scale dispersing of clay lamella in rubber base to result in excellent strengthening effect, and obviously raised mechanical performance, especially stretching strength, of the vulcanized rubber.

Description

technical field [0001] The invention relates to a method for preparing clay and styrene-butadiene rubber nanocomposite materials, in particular to a method for in-situ organic modification of inorganic clay and preparation of clay and styrene-butadiene rubber nanocomposite materials with excellent mechanical properties by using emulsion intercalation method Preparation. Background technique [0002] As a resource-rich mineral, clay is cheap, has good physical and mechanical properties and high chemical resistance, and has a natural nanostructure. When clay is used as a reinforcing agent to prepare clay-rubber composite materials, it is dispersed in the polymer matrix as nano-units, which can exert its nano-effect and meet the requirements of high reinforcement and low density at the same time, so it can be used as nano-scale rubber Reinforcing agent. At present, as far as clay-reinforced rubber is concerned, the biggest problem is how to intercalate or exfoliate the aggreg...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L9/06C08K9/04
Inventor 张立群贾清秀吴友平王益庆叶欣张惠峰向平
Owner BEIJING UNIV OF CHEM TECH
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