How do silica gel manufacturers deal with the adsorption problem of silica gel products?

For users who often use silicone mobile phone cases, they find that silicone products often absorb dust and lint, and often need to be cleaned, which is very troublesome. Dust sticking to silicone products is an obvious shortcoming. How does this phenomenon occur and what are the solutions.

 

Reasons for adsorption problems of silicone products:

Silica gel mainly has physical adsorption force. Even if it is placed without moving the surrounding cilia, dust will gradually stick to the surface of the product due to the electrostatic reaction. Because the organic silicone raw material is anode-polar, it can be used as various chemical auxiliary materials. Other polar substances have strong adsorption reactions. In order to enhance the adsorption force of silica gel, the active structural units of the adsorbent should be increased.

Therefore, if the silica gel is calcined to make it completely dehydrated, the silicone hydroxyl groups of the silica gel will be completely destroyed and the adsorption capacity will be reduced or even non-existent; if a large amount of water is added to the silica gel, its adsorption capacity will also be reduced, because the silicone hydroxyl groups form a chemical reaction with water. Too many hydrogen bonds thus reducing its reactive proportion.

Secondly, for products with relatively high hardness, there is no effect of adsorbing dust and debris. For products with low hardness, there will be no dust sticking phenomenon when using electrostatic rubber to produce them.

 

Solutions to the adsorption problem of silicone products:

For manufacturers

Baking keeps the product dry and removes a certain amount of static electricity

Spray hand oil to prevent dust from sticking. Hand oil is an oily substance. Its main function is to increase the smoothness of the silicone surface and maintain the dust-proof effect.