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White carbon blackSurface high temperature treatment is to subject precipitated silica to high temperature heat treatment , to remove some molecules adsorbed on the surface of white carbon black, that is, water and other low molecular weight adsorbates. As a result, some vulcanization characteristics can be improved, but the effect is not significant. Surface chemical treatment is to use certain chemical reagents to react with the active silanol groups on the surface of silica to improve the affinity and reactivity of silica and polymer rubber. There are many reagents that can chemically treat the surface of silica black, and there are also various methods for chemical treatment. There are many literatures and papers about this. Kain Chemical will give you a brief introduction below.
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The specific process methods used are:
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(1) Steam method: Directly contact the dry silica with the steam of organic matter to produce the necessary reaction;
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(2) Reflux method: Boil silica and reaction solution together and reflux to produce the desired reaction ;
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(3) Autoclave reaction method: Heat and press the silica and the reaction liquid together in an autoclave to cause it to react Specified response. The specific chemical reactions used are: as the degree of hydration increases, the number of isolated silanol groups gradually decreases, while the ortho-type silanol groups gradually increase. The ortho-position silanol group has strong adsorption capacity for water and polar substances.
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Application of silica black in papermaking filler
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How much do you know about The application of silica black in papermaking fillers?
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Today, Kain Chemical is here to discuss with you:
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Application of silica black in papermaking fillers: Using silica black as paper filler can improve the paper's resistance to ink permeability Through performance and mechanical strength, it increases whiteness and reduces unit weight. It can effectively realize lightweight paper, reduce production costs and improve paper performance.
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In addition, silica can also be used in many industries such as fire-fighting agents, feeds, cosmetics, matting agents, pigments, and paints.
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Application of silica in food
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The so-called silica blackIt is the main component of what people usually call sand or glass powder. The U.S. Food Administration has confirmed that the main ingredient in Wendy's chili sauce does contain an anti-caking agent containing silica.
" >When silica is used in food, it is usually used as a food additive, and this substance is also found in some milk powder. Because non-dairy cream powder with high fat content is easy to agglomerate during storage and processing, and the filling time will also be adversely affected by its low fluidity, so it is okay for manufacturers to add an appropriate amount of silica to the product. It significantly improves the caking and low fluidity problems of non-dairy cream powder.
" >Under the premise of an appropriate amount of white carbon black, this It will not affect the health of consumers. It can also reduce the proportion of insoluble objects in non-dairy creamer, reduce production time, reduce powder, avoid production machines from being contaminated by related powders, and prevent agglomeration caused by storage.
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