How to Test White Carbon Black
1、 White carbon black test items
1. Test items of precipitated silica (precipitated hydrated silica)
The chemical formula of precipitated silica is SiO2 • nH2O. Precipitation method white carbon black testing items mainly include silica content, color μ M Sieve residue, heating loss, burning loss, PH value, total copper content, total manganese content, total iron content, dibutyl phthalate absorption value, water soluble matter, 300% elongation stress, 500% elongation stress, tensile strength, elongation at break, physical morphology, dispersibility, specific surface area and other indicators.
2. Test items of highly dispersed precipitated silica (highly dispersed precipitated hydrated silica)
The test items of highly dispersed precipitated silica are basically the same as those of ordinary precipitated silica, but the test items of technical indicators and typical values are added. Therefore, the technical indicators of highly dispersed precipitated silica also require the detection of median particle size and particle proportion. The typical value specifies that the total surface area, the specific surface area of CTAB adsorption and the dispersion degree need to be tested.
3. Test items of fumed silica
The appearance of fumed silica shall be fluffy white powder. Specific test items mainly include specific surface area of nitrogen adsorption, burning loss, silicon dioxide content, aluminum oxide content, titanium dioxide content, iron oxide content, carbon content, chloride content, suspension PH value, 105 ℃ volatile matter, vibrating density, 45 μ M sieve residue and other indicators.
2、 Test standard for white carbon black
1. The testing standards for white carbon black products mainly include:
GB/T 20020-2013 Gaseous Silica
GB/T 32678-2016 Rubber Compounding Agent Highly Dispersed Precipitated Hydrated Silica
HG/T 3061-2009 Rubber compounding ingredients Precipitated hydrated silica
2. The national standards for testing methods of white carbon black for rubber mainly include:
GB/T 23656-2016 Rubber compounding ingredients Determination of specific surface area of precipitated hydrated silica CTAB method
GB/T 28600-2012 Rubber compounding ingredients Determination of average pore size of precipitated hydrated silica
GB/T 28601-2012 Rubber compounding ingredients Determination of precipitated hydrated silica gel content
GB/T 32698-2016 Rubber compounding ingredients Determination of particle size distribution of precipitated hydrated silica Laser diffraction method
GB/T 34698-2017 Rubber compounding ingredients Determination of water soluble content of precipitated hydrated silica Conductivity method
GB/T 36764-2018 Rubber compounding ingredients Determination of heavy metal content by precipitation hydrated silica inductively coupled plasma atomic emission spectrometry
3. The industrial standards for testing methods of white carbon black for rubber mainly include:
HG/T 2404-2008 Identification of Rubber Compounding Agent Precipitated Hydrated Silica in Styrene Butadiene Rubber
HG/T 3062-2008 Determination of Silica Content in Precipitated Hydrated Silica Dry Samples of Rubber Admixtures
HG/T 3063-2008 Rubber Compounding Agent Precipitated Hydrated Silica Color Comparison Method
HG/T 3064-2008 Rubber Compounding Agent Precipitated Hydrated Silica 45 μ M Determination of sieve residue
HG/T 3065-2008 Rubber compounding ingredients Determination of loss on heating of precipitated hydrated silica
HG/T 3066-2008 Rubber compounding ingredients Determination of loss on ignition of precipitated hydrated silica dry samples
HG/T 3067-2008 Rubber compounding ingredients Determination of pH of precipitated hydrated silica suspension
HG/T 3068-2008 Rubber compounding ingredients Determination of total copper content in precipitated hydrated silica
HG/T 3069-2008 Rubber compounding ingredients Determination of total manganese content in precipitated hydrated silica
HG/T 3070-2008 Rubber compounding ingredients Determination of total iron content in precipitated hydrated silica
HG/T 3071-2008 Rubber compounding ingredients Determination of refractive index of precipitated hydrated silica
HG/T 3072-2008 Rubber compounding ingredients Determination of absorption value of precipitated hydrated silica dibutyl phthalate (DBP)
HG/T 3073-1999 Rubber compounding ingredients Determination of specific surface area of precipitated hydrated silica Nitrogen adsorption method
HG/T 3748-2014 Rubber compounding ingredients Determination of water soluble content of precipitated hydrated silica Cold extraction method
In fact, white carbon black can be found not only in the rubber field, but also in medicine, pesticides, printing ink, paint, paint, toothpaste, paper, food, feed, cosmetics, batteries and other fields. As an important raw material of silicon compounds, various detection indexes of white carbon black become the key points of its quality. PH value, soluble salt, specific surface area, oil absorption value, ignition loss at 900 ℃ and heating loss at 105 ℃ are commonly measured items of white carbon black.