Why does resin absorb water?

The world's largest absorber of water is the sponge. But now people have synthesized a polymer material that absorbs more water than sponges, called superabsorbent resin, which can absorb 500-3000 times its own weight.

This is a magical white powder, each polymer resin particle, like a small reservoir. Scattering them in arid deserts with little rain can absorb the water that seeps up from the ground at night. If you mix fertilizer and water in advance, you can grow crops in desert areas.

Use it to make diapers, absorb water well, and be hygienic. It is used to make sanitary napkins.

Cleaning napkins is more popular with people. This superabsorbent resin is not toxic, and when it is mixed with drugs and cosmetics, the drug is slowly released to prolong its effect. Use it to make fruit bags, and fresh fruits can be kept fresh for a long time.

The ability of superabsorbent resins to absorb water lies in the fact that there are many "groups" in the polymer that can attract water, and it is like a pair of water molecules that can pull water.

The same as the "hand". When the "hand" on the whole macromolecule pulls a lot of water molecules, a white powder becomes a small water ball that is "full" with water.

Some of these miraculous powders are made of starch and cellulose natural polymers as the skeleton through grafting and copolymerization; Some are made by chemical synthesis methods; Others use acrylic.

It is obtained from the comprehensive utilization of waste silk. The metal with the best ductility.

International market. ** is usually used to represent the monetary value. In fact, ** also has many excellent properties, such as non-oxidation and not easy to form compounds with other elements, as well as incomparable ductility of other metals, so it is used in industry and cutting-edge science and technology.

People take advantage of the excellent ductility and hammer it into extremely thin gold leaf.

The thinnest gold leaf can be as thin as a micron. The total thickness of 23 26 extremely thin pieces of gold leaf stacked on top of each other is just as thin as the thinnest part of the cicada wing, which shows that it is not enough to describe it as "as thin as a cicada wing".

The gold foil processed by hand hammer forging is mainly used for decoration because of its uneven thickness and micropores, and is called gold-filled. Such as Gaocheng, Hebei.

Ruins of the middle Shang Dynasty and Yin Ruins in Anyang.

All have been unearthed with gold leaf for decoration. With the development of production technology, the gold foil is getting thinner and thinner, and when decorating, you only need to paste the gold foil on the surface of fabrics, leather, paper, utensils or buildings, which not only saves the best but also obtains the decorative effect of gold shining and never corroding.

Gold leaf for infrared.

The reflectivity is high, and if it is processed into gold leaf of different thicknesses with a special process, it will appear to have a variety of colors. This special performance has been applied to infrared detectors and anti-missile technology.

Some resins contain hydrophilic groups, such as hydroxyl groups and acid groups, which are highly absorbent, especially for structures that form networks, such as gels, which have higher water absorption.