How Toilet Paper Absorbs Water

How toilet paper absorbs water
1. The toilet paper manufacturer introduced that paper is mainly composed of cellulose. The molecular structure of cellulose contains a lot of hydroxyl-OH, which has good hydrophilicity and can form hydrogen bonds with water to associate with water, thereby making the surface of the paper It absorbs water easily. The principle of water absorption is the so-called "capillary phenomenon", which is caused by the surface tension of water.
2. Capillary phenomenon, also known as capillary action, refers to the phenomenon that the liquid rises on the inside of a thin tubular object due to the difference between cohesion and adhesion, and overcomes gravity. When the capillary is inserted into the infiltrating liquid, the liquid level in the tube rises and is higher than the outside of the tube. The towel absorbs water and the groundwater rises along the soil, which are all capillary phenomena.
3. The liquid surface is similar to a tensioned rubber film. If the liquid surface is curved, it has a tendency to flatten. Therefore, the concave liquid exerts a pulling force on the liquid below, and the convex liquid exerts pressure on the liquid below. The liquid level of the infiltrating liquid in the capillary is concave. It exerts a pulling force on the liquid below, so that the liquid rises along the tube wall. When the upward pulling force is equal to the gravity of the liquid column in the tube, the liquid in the tube stops rising. Achieve balance.
4. There are many tiny pores in toilet paper, which act as capillaries. So, water can travel up the toilet paper. Other capillary phenomena include: the catheter in the plant stem is the very thin capillary in the plant, which can absorb the moisture in the soil; bricks absorb water, towels absorb sweat, chalk absorbs ink and so on.
5. Toilet paper is mainly used for people's daily hygiene and is one of the indispensable paper types for the people. In order to make the toilet paper soft, the paper is usually wrinkled by mechanical methods to increase the softness of the toilet paper. There are many raw materials for making toilet paper, and the commonly used raw materials are cotton pulp, wood pulp, bamboo pulp, straw pulp and other natural and pollution-free raw materials.