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Preparation of nano element tellurium and method for vulcanizing rubber by using nano element tellurium

A technology of element tellurium and nanometer, which is applied in the preparation of nanometer element tellurium and its vulcanized rubber, can solve the problems of limited tellurium and low vulcanization activity, and achieve the effect of simple extraction process, high mechanical properties and wide sources

Active Publication Date: 2015-01-21
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Previous practice with tellurium vulcanizates was limited by the low vulcanization activity of tellurium

Method used

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  • Preparation of nano element tellurium and method for vulcanizing rubber by using nano element tellurium
  • Preparation of nano element tellurium and method for vulcanizing rubber by using nano element tellurium
  • Preparation of nano element tellurium and method for vulcanizing rubber by using nano element tellurium

Examples

Experimental program
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Effect test

Embodiment 1

[0034] (1) Disperse sodium tellurite (for example, 100 g) into water in a measured proportion to prepare a 1 mg / ml dispersion. Dissolve epicatechin gallate in water (3wt%), mix the above two solutions in proportion (the amount of epicatechin gallate is 300wt% of sodium tellurite), and after fully stirring, Heated to 50°C and reacted for 24h. The dispersion liquid is suction-filtered, washed repeatedly, and then the obtained modified nano-element tellurium is suction-filtered. The form of the nanometer element tellurium is a nanorod with a diameter of 20-100 nanometers and a length of 0.2-1 micron. The obtained nano element tellurium has excellent solubility and dispersion stability in water.

Embodiment 2

[0036] (2) Disperse sodium tellurite (for example, 100 g) into water in a measured proportion to prepare a 2 mg / ml dispersion. Dissolve tannic acid in water (5wt%), mix the above two solutions in proportion (the amount of tannic acid is 400wt% of sodium tellurite), mix well, stir well, heat to 80°C, and react for 48h. The dispersion liquid is suction-filtered, washed repeatedly, and then the obtained modified nano-element tellurium is suction-filtered. The shape of the nano-element tellurium is a nano-rod with a diameter of 40-80 nanometers and a length of 0.3-2 microns. The obtained nano element tellurium has excellent solubility and dispersion stability in water.

Embodiment 3

[0038] The modified nano-element tellurium prepared in Example 1 was ultrasonically dispersed in water at a concentration of 2 mg / ml. It is mixed with styrene-butadiene rubber latex (solid content 30%) in the proportion of 100 parts of styrene-butadiene rubber (such as 100 g) and 2 parts of tellurium under stirring, and then co-coagulated with calcium chloride to obtain coprecipitated rubber. The coprecipitated rubber was repeatedly washed with distilled water and dried to obtain styrene-butadiene rubber containing 2 parts of elemental tellurium. In the open mill, sequentially add tellurium-containing styrene-butadiene rubber, 5 parts of ZDC (zinc diethyldithiocarbamate), 5 parts of zinc oxide, 1 part of stearic acid, 1.5 parts of anti-aging agent (N-isopropyl -N'-phenyl-p-phenylenediamine), vulcanized at 150 degrees, and its vulcanization time and tensile strength are shown in Table 1.

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Abstract

The invention discloses preparation of a nano element tellurium and a method for vulcanizing rubber by using the nano element tellurium. The polyphenol modified nano element tellurium is prepared by taking cheap sodium tellurite as a tellurium source and plant polyphenol as a reducing agent and a modifier of the nano element tellurium. The rubber which is vulcanized by using tellurium is prepared by taking the prepared nano element tellurium as a vulcanization agent and an over-speed accelerant as an accelerant. The preparation method of the nano element tellurium, which is disclosed by the invention has the advantages of environment friendliness, simple process and the like, and the reducing agent and the modifier used in the preparation method are natural compounds, have the characteristics of being rich in resource, low in price, environment-friendly and non-toxic and are applicable to high-efficiency and on-scale preparation of the nano element tellurium. By adopting the method that the nano element tellurium is taken as the vulcanization agent and the over-speed accelerant is taken as the accelerant, the tellurium vulcanized rubber can be prepared by using a universal rubber machining process. Compared with sulfur vulcanized rubber, the tellurium vulcanized rubber prepared by using the method is relatively good in mechanical property.

Description

technical field [0001] The invention belongs to the field of rubber preparation, and in particular relates to the preparation of nano-element tellurium and a method for vulcanizing rubber. Background technique [0002] The vulcanization of rubber has an important impact on the properties of rubber, and the optimization of rubber crosslinking structure is one of the main issues in the research of high-performance rubber materials. Although vulcanized and peroxide vulcanized rubbers have been widely used, the selection of crosslinks with better stability is particularly critical for the improvement of rubber properties. As early as the 1940s, sulfur homologues, including elemental selenium and elemental tellurium, were tried to vulcanize rubber. However, at that time, synthetic rubber and modern rubber accelerators had not yet appeared, and the change of vulcanization conditions was limited. Therefore, due to its The vulcanization efficiency is not high (it can only be mixed ...

Claims

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Application Information

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IPC IPC(8): C08K9/04C08K3/02C08L9/06C08J3/24
Inventor 朱立新郭宝春翁佩锦
Owner SOUTH CHINA UNIV OF TECH
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