Find the phenomenon when wool burns The phenomenon of cotton burning

Wool smoke is whitish and smells of burning hair. The pure cotton smoke is blue, and the smoke is very light when fully burned, giving off the smell of burning plants and trees. Both will leave very little powder after combustion and will not produce induration.

In the wool processing, short wool and coarse wool are used to produce carpet upholstery cloth, needle-punched carpet sandwich layer, thermal insulation materials and other products through acupuncture, sewing and other methods. This type of wool has different lengths, high impurities, poor spinnability, and is difficult to process, and the product can be chemically post-treated to improve quality.

Cotton will be slowly oxidized in sunlight and atmosphere, causing the strength to decrease. Long-term high temperature effects can damage the cotton cloth, but it can withstand 125 150 short periods of high temperature.

Wool burning: Wool is protein, and human hair and nails are also made up of protein. Wool burning is the same as these two burning smells, and the authenticity of wool products can be identified by this method.

When burning, it burns while smoking, foaming, and smelling of burning, and there are many ashes, and the shiny black must be brittle and lumpy.

Cotton burning: When burning, it smells of burning paper, and the residue after burning is black by hand, and the cotton is fine dust.

Close to the flame: no shrinkage or melting; Contact flame: rapid burning; Flame of separation: continue to burn; Odor: the smell of burning paper;

Residue characteristics: A small amount of grayish-black or grayish-white ash.

When the wool fiber is burned, it shrinks and curls, smokes and bubbles, has the smell of burning hair, and the burning residue becomes brittle, and it is broken when pinched by hand.

Cotton fiber. When burning, it does not melt, does not shrink, has the smell of burning paper, and the residue ash is less, gray-white, and it is scattered when it is blown.

Polyester fiber, shrinkage when burning, melting, first melting and then burning, yellow flame, smoke, dripping and drawing, the residue into a glassy black-brown hard ball, not easy to crush.

Hello! Cotton and wool contain proteins, and the ash produced by burning is gone with a twist of the hand.

After the chemical fiber is burned, it forms very hard particles.

It only represents a personal opinion, don't spray if you don't like it, thank you.

Cotton fibers: Cotton fibers are ignited just after the flame, burning quickly, the flame is yellow, and the smoke is blue. Cotton burns and emits a paper smell; After burning, the cotton has a polar type of powder ash with little powder, which is black or gray.

Wool fiber: the hair smokes when it encounters fire, foams when burning, burns slowly, emits a burning smell of burning hair, and the ashes are mostly shiny black spherical particles after burning, and the fingers are crushed as soon as they are pressed. <

Cotton fiber eggplant: Cotton fiber is just close to the flame that ignites, burns quickly, the flame is yellow, and the smoke is blue. Cotton burns and emits a paper smell; When burned, cotton has very little powder ash and is black or gray in color.

Wool fiber: the hair smokes when it encounters fire, foams when burning, burns slowly, emits a burning smell of burning hair, and the ashes are mostly shiny black spherical particles after burning, and the fingers are crushed as soon as they are pressed.

1. When burning, the smell of burning paper is: cotton fiber trembling rent stupid dimension. When burned, there is a smell of burnt hair: wool fibers.

2. Wool fiber is the first deformation of sheep, with excellent warmth, and is mostly used for clothing in autumn and winter, but it is easy to be moth-eaten.

3. The main component of cotton fiber is cellulose, and the rest is cellulose companion organisms. The content of cotton cellulose and its companions depends on the maturity of the cotton fibers.

The main component of wool is protein, after combustion, nitrogen dioxide, carbon dioxide and water will generally be produced, in the general (air), it will be fully combusted, and will not produce harmful substances to people, 10, carbon dioxide and water, 2, hydrogen cyanide: wool silk fabrics and state hand nitrogen-containing plastic products will produce this gas when burned. The effects of different concentrations of hydrogen cyanide on the human body are:

When the concentration of hydrogen cyanide is 110 fpm, people die when it is more than l hours; At a concentration of 181 ppm, a person can die in 10 minutes; At a concentration of 280 ppm, the person dies instantly.

Wool is protein and has a burnt hair smell. It should be a compound of nitrogen, whether it is harmful is not clear, the above information is for reference only....1, nitrogen dioxide, carbon dioxide, water and carbon, 1, the composition of wool is protein, containing hydrocarbon, oxygen, nitrogen, sulfur and other elements, the harmful substances generated after combustion are ammonia, dioxide, hail and sulfur.

1. Wool is organic.

Carbon dioxide and water are produced in a completely burned state.

What substances are produced during the combustion process of carbon dioxide, sulfides, hydrides, carbon, 1, "wool" in the state of incomplete combustion?

It is said that wool does not produce harmful substances during the burning process.

But what I have only heard is not based on the book.

I don't know if it's true.

Answer: Analysis: When the wool is close to the flame, it is curled up first, and there is a smell of burning hair when burning, and there are more ashes after burning, which is a hard lump with a gloss, and it becomes a powder when pressed with a finger The chemical fiber such as nylon is quickly rolled up when it is close to the flame, and the burning is relatively slow, and it has the smell of celery, and it can be drawn into silk while it is hot, and the ash is gray-brown glass spherical, which is not easy to break Using this property, wool fabrics and chemical fiber fabrics can be preliminarily distinguished

Brother Cotton fiber is actually two concepts "cotton" and "fiber".

Cotton is grown, fiber is synthesized, our common plastic is a fiber (the word fiber first appeared in the synthesis of organic chemistry), of course, this is quite professional, I just happen to be a chemical student.

If you are a cotton lit, it is a strange smell that smells unclear. If the ignition is fiber, it also smells (I said this fiber is the kind in organic chemistry), and you must have smelled the smell of less plastic.

And the wool is a faint stinky after it burns, but it's definitely not a stink.

If you want to tell the difference between these two (or three), there's actually a better way to do it, and it's also to burn it, but not by smell, but by what is left.

Cotton fibers are all brought together.

After the cotton is burned, the hand feels that its ash is more delicate.

And the fiber doesn't need to be talked about, but if it really doesn't work, you can try a piece of plastic yourself, and it's hard anyway.

The wool is extra loose and feels particularly rough when touched.

And the color: If it is pure wool, without adding pigments, the color of the gray left over from the burnt wool is a little yellow black, while cotton is relatively pure black.

Ignition of cotton fibers burns to produce carbon dioxide and water, which is odorless.

Wool is a protein that contains nitrogen compounds in addition to carbon dioxide and water.

Wool contains protein, and it stinks when burned. Cotton is mainly fiber, which is a compound of carbon, hydrogen and oxygen, which is basically odorless.

The main chemical component of cotton is cellulose molecule, which contains carbon, hydrogen and oxygen.

The main component of wool is keratin, which is composed of a variety of amino acid residues, and can be linked into a helical long chain molecule, which contains carboxyl groups, amine groups and hydroxyl groups, etc., forming salt bonds and hydrogen bonds between molecules. The long chains are interconnected by the disulfide bonds of the cystine.

Cotton ignition is a strange smell that smells unclear. And when the wool burns, it's a lighter, high-smelling, but it's definitely not a smell. The taste is different because of the composition and content.

Wool felt is made of wool and aluminum fibers, both of which are combustibles, but why don't they burn themselves when extinguishing a fire?

Reason 1: Wool felt is covered with combustibles, isolating oxygen or air; Reason 2: The good conductor of thermite can quickly diffuse the heat generated by combustibles, so that the temperature cannot reach the ignition point of wool felt.