| Reaction trigger glue only need is the hydroxide ion in water |
|
Glue to be worthy of the name -- just a drop can put the thumb and forefinger permanently your stick together, you didn't even "ouch" sound; 6 square centimeters of adhesive can put a ton of matter. So what is the principle of this kind of strange matter? The secret lies in its main ingredients, cyanoacrylate. Cyanoacrylate is a kind of acrylic resin, can almost instant adhesive (chemical bond formed its most solid). It only requires response trigger is hydroxide ion in water. Hydrogen and oxygen ions are easy to obtain, because almost any surface you might want to adhesive object will contain at least trace water. White is by the solvent evaporation of adhesion. El Moldow use washable glue in the solvent is water. Water evaporation, diffusion into the material in the gap of polyvinyl acetate latex will form an elastic adhesive. On the other hand, the glue has gone through a process called anionic polymerization. Cyanoacrylate molecules come into contact with water after the start of mutual connection, they aggregate into chains, thus forming a plastic mesh solid. Glue thickening harden, molecular until coated beam cannot be moved. Other applications If you think the ability of cyanoacrylate repair damaged goods is very strong, please have a look again other applications. Glue smoke is sometimes used to criminal investigation, to find the hidden fingerprint. The principle is as follows: Need to be detected fingerprint items are placed in a heated gas closed container. In the container into the cyanoacrylate; it will evaporate, and make it spread with fan circulating in the container. Residual material (such as fingerprint of amino acids and glucose) will react with the gasification of glue, and make the fingerprint presentation. Another interesting application is the use of cyanoacrylate to replace suture wound closure. The researchers found that the type of change, through glue alcohol can reduce the toxicity of compounds to the organization, such as the ethanol or methanol butanol octanol replaced or. Through further research, this approach is expected to be more widely used, and eventually replace the wound suture. By the way, if you find yourself fingers by strong glue, so a little acetone nail polish remover can help you separate the fingers. |
- Previous：No
- Next：No