Method for determining content of silicon dioxide in rubber through spectrophotometer

A silicon dioxide and rubber technology, applied in the direction of color/spectral characteristic measurement, etc., can solve the problems of high price, cumbersome operation, large error, etc., and achieve the effect of accurate and fast measurement, less sampling amount and wide measurement range

Inactive Publication Date: 2014-03-26
BEIJING RED AVENUE INNOVA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the basis of the former, the latter increases the detection of soluble silicate in the sample and improves the accuracy, but there are still the following disadvantages: (1) it is necessary to measure the silica in the form of insoluble silica and soluble silicic acid respectively , the introduction of two components, the error is large; (2) the detection process is complicated, the operation is cumbersome and time-consuming; (3) the detection vessel used is a platinum crucible, which is expensive; (4) tetrafluoride needs to be volatilized during the detection process Silicon, which is more polluting to the environment and more harmful to the human body

Method used

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  • Method for determining content of silicon dioxide in rubber through spectrophotometer
  • Method for determining content of silicon dioxide in rubber through spectrophotometer
  • Method for determining content of silicon dioxide in rubber through spectrophotometer

Examples

Experimental program
Comparison scheme
Effect test

preparation Embodiment 1

[0062] Preparation Example 1: Preparation of Vulcanized Rubber A

[0063] Formula 1 (parts by mass):

[0064] Component 1:

[0065]

[0066] Component 2:

[0067] Sulfur: (Puyang Flex Chemical Co., Ltd.) 1.5,

[0068] Vulcanization accelerator CZ: (Flexsys) 1.2;

[0069] Vulcanized rubber preparation process: In a 1.6-liter Banbury mixer (manufactured by FARREL), add component 1, gradually raise the temperature to 160°C and mix for 5 minutes to obtain a masterbatch, and cool the masterbatch to 90°C The following; then use the XK-160 open rubber mixer (manufactured by Qingdao Xincheng Yiming Rubber Machinery Co., Ltd.) to mix component 2 into the masterbatch, and mix the above mixture for 10 minutes at a temperature of 70°C to obtain Rubber composition; the composition obtained by the above method is molded on a BH-25T plate vulcanizer (produced by Bohai Experimental Machinery Factory, Zhenwu Town, Jiangdu District) (vulcanization temperature 160°C, vulcanization time 30...

Embodiment 1

[0070] Embodiment 1, measure the silicon dioxide content in the sample A according to the method of the present invention

[0071] (1) Draw a standard curve

[0072] Step 1. Accurately weigh 109.2mg of reference silica into a nickel crucible, add 1g of potassium hydroxide, heat on an electric furnace until it is completely melted, add water to leaching to dissolve it, transfer it to a 100mL volumetric flask, and shake to a constant volume . The concentration of this standard stock solution is 1092mg / L.

[0073] Step 2. Accurately pipette 10 mL of silica standard stock solution, and dilute to a 100 mL volumetric flask. The concentration of this standard solution is 109.2 mg / L.

[0074] Step 3. Accurately measure 0.0, 0.2, 0.4, 0.6, 0.8, 1.0mL of silicon dioxide standard solution in a 50mL volumetric flask, add 0.85mL of 1:1 hydrochloric acid, shake well, add ammonium molybdate aqueous solution (40g / L) 5mL, shake well, stand for 15min. Then add ferrous ammonium sulfate (40g / ...

preparation Embodiment 2

[0112] Preparation Example 2: Preparation of Vulcanized Rubber B

[0113] Formula 2 (parts by mass):

[0114]

[0115]

[0116]

[0117] Component 3: Sulfur (Puyang Flex Chemical Co., Ltd.) 2.2;

[0118] Vulcanization accelerator CZ (Flex) 1.8;

[0119] Vulcanization accelerator DPG-80 (Lianyungang Lianlian Chemical Co., Ltd.) 0.75.

[0120] Vulcanized rubber preparation process: In a 1.6-liter Banbury internal mixer (produced by FARREL), add component 1, gradually raise the temperature to 160 ° C and mix for 6 minutes to obtain a section of mixed rubber, which is parked at room temperature for 20 hours; then continue to mix in Banbury. In the mixer, gradually raise the temperature to 145°C and mix the mixed rubber and component 2 for 5 minutes to obtain a masterbatch, and cool the masterbatch to below 90°C; then use XK-160 open-type rubber mixing machine (manufactured by Qingdao Xincheng Yiming Rubber Machinery Co., Ltd.) to mix component 3 into the masterbatch, a...

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Abstract

The invention relates to a method for determining the content of silicon dioxide in rubber through a spectrophotometer. The method comprises the steps as follows: subjecting a rubber sample to ashing treatment; adding potassium hydroxide into the ashed sample for treatment so as to convert silicon in the sample into soluble silicate; then reacting a silicon-containing solution with ammonium molybdate in a hydrochloric acid medium; then using ammonium ferrous sulfate for reducing a reaction product in the last step to silicon molybdenum blue, and measuring the absorbance of the silicon molybdenum blue in a position with a set wavelength of 700-880 nm. The method is applied to all rubber except silicon-containing rubber.

Description

technical field [0001] The present invention relates to a method for measuring the silicon dioxide content in rubber, more specifically, to a method for measuring the silicon dioxide content in rubber using a spectrophotometer using the silicon molybdenum blue method. Background technique [0002] Silica is widely found in nature and forms rocks together with other minerals. Naturally occurring silicon dioxide, also called silica, is a hard, refractory solid. The main component of quartz is also silicon dioxide, a transparent quartz crystal, which is what we often call crystal. Silica has a wide range of uses, and the main raw material of optical fiber, a high-performance communication material that has been used so far, is silica. Generally purer quartz can be used to make quartz glass. Quartz glass is often used in the manufacture of high temperature resistant chemical instruments. Crystals are often used to make important components and optical instruments in the elec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/31
Inventor 胡小娜李秋荣房彩琴宋传全董栋
Owner BEIJING RED AVENUE INNOVA
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