Why do glow in the dark sticks glow? What material emits light at night, like a glow stick?

The chemicals in glowsticks are mainly composed of three substances: peroxides, esters, and fluorescent dyes. To put it simply, the principle of glow stick luminescence is that peroxides and esters react, and the energy after the reaction is transferred to the fluorescent dye, which then fluoresces.

A glass tube interlayer is usually placed in the glow stick on the market, and the inside and outside of the interlayer are isolated from peroxides and ester compounds, and after rubbing, the two compounds react to make the fluorescent dye glow.

Since the liquid chemicals in the glow sticks are packaged in polyethylene (plastic), they do not cause much harm to the human body. Because the light emitted by the glow stick is the non-radioactive light emitted by the chemical reaction to excite the dye, not the light emitted by the radiation excitation dye, it will not harm the human body. However, Zhao Fuqun also objected to the current practice of some people to catch up with the fashion, break the light stick, and smear the liquid inside on the body, because the direct contact of the chemicals in the light stick will cause certain damage to the human body.

Special care should be taken not to allow children to accidentally ingest it.

The reason why there is a view that fluorescent substances can harm the human body is because radioactive substances are used in some luminous watches and mine emergency lights, which make the dye glow in the dark, so people mistakenly believe that radioactive substances are also used in glow sticks, forming an error in understanding. The way for consumers to identify whether a luminous product is radioluminous is that the radioluminescence lasts for a longer time and the light intensity is weaker; Non-radiated light lasts for a shorter period of time.

Substances that emit various colors of fluorescence in the dark are called noctilucent materials. Human beings have a long history of using luminous materials, such as on the dial of watches, to make a kind of luminous watch. There are two types of luminous materials: self-luminous type and phosphorescent type.

The basic composition of self-luminous luminous materials is radioactive materials, which do not need to absorb energy from the outside and can continue to emit light, not only at night but also during the day. Because it contains radioactive materials, it is limited in its use, and disposal after disposal is also a major problem. Phosphorescent luminous materials rarely contain radioactive materials and have no restrictions on their use, but they can only emit light by absorbing light energy from the outside, and they must reserve enough light energy to ensure that they emit light all the time.

Another drawback of luminescent luminous materials is insufficient brightness. For example, zinc sulfide has been used as an afterglow-type phosphor in the past, but the luminescence time is too short and the brightness is not enough. So it was later mixed with a radioactive isotope Ju-147, and the luminescence effect was ideal, but the radioisotope intervened.

It does not meet the requirements of environmental protection. Harmful to humans, albeit small.

Why do glowsticks glow? Because the peroxide in the glow stick and other substances are passed to the fluorescent dye when the stick is folded, it emits light.

Why do jellyfish emit light.

Luminous powder. Phosphorescent luminescent pigments are powdered photoluminescent materials that absorb a variety of visible light to achieve luminescence and can be recycled multiple times. It does not contain radioactive elements and can be used as an additive.

The pigment presents its own exterior color in the bright areas and different colors of light in the dark areas, presenting good low-level emergency lighting, signage and decorative landscaping functions. Various luminescent products made with this pigment.

Utilization of luminescent powder.

People use the characteristics of luminous powder to shine for a long time in actual life, make a weak lighting source, have a special use in the military department, and apply this material to various switch signs on aviation instruments, clocks, windows, machines, door handles, etc., and can also be pressed into various symbols, components, supplies (such as power switches, sockets, fishing hooks, etc.) together with various translucent plastics.

These light-emitting parts continue to glow at night or when they get up after an unexpected power outage or lightning, allowing people to distinguish the direction of their surroundings and bring convenience to their work and life. The ultra-fine particles of luminous materials are incorporated into textiles to make the colors more vivid, and children can wear luminous textiles to reduce traffic accidents.

It has high light transmittance and high solvent resistance, so it emits light.

Romantic? Think about candles! Hehe.

There is a light-emitting path called the star path, and the materials used can self-emit at night.

There is a new type of road called Star Road, which will emit light at night and can weakly replace street lights, using a new type of particle material, which absorbs ultraviolet rays during the day and emits light at night.

There is a kind of self-luminous particles called Xinglu, which are charged by absorbing ultraviolet light during the day, and will glow like a glow stick at night.

In order to understand the chemical composition of phosphor, we first thought of the luminescence of glowworms, and the luminescence principle of glowworms mainly includes the following series of processes.

Photogenesis Proteins Oxygenated Photoproteins (emit green light) Oxygenated photoproteins H2O photoproteins.

This is the reason why glowworms can continue to emit light, and the light flashes and flashes, it is worth noting that the green light emitted by glowworms is a kind of"Cold light"The result is a 97% conversion rate.

Secondly, we also pay attention to the luminescence of luminescent plastics, which are mainly mixed with some radioactive substances in ordinary plastics, such as 14C, 35SR, 90SR and Na, Th and luminescent materials ZNS, CAS, these sulfides are excited and emit visible light (cold light) under the irradiation of radioactive light.

The composition is: Categories.

Chemical Formula Color.

Density red pink.

Y2O3: EU white.

Green Pink CEMGL11O19: TB White.

Blue Pink Bamgal10O17: EU White.

Bimodal blue powder BAMGA10O17: (EU, MN) The composition of the white conversion phosphor, that is, the infrared excitation phosphor, is:

Chemical Composition: YeryBF3

Appearance: white inorganic powder.

Grain size: 30 nm

Excitation wavelength: 980nm

Glowing color: green.

Characteristics: high light transmittance, high solvent resistance, acid and alkali resistance.

Most of the artificially made luminous balls are made of phosphor (commonly known as luminous powder) as the main raw material, and are divided into two categories: self-luminous and phosphorescent according to different materials.

Due to the use of radioactive luminous powder, the self-luminous ball is mixed with a trace amount of radioactive material into the phosphor, and the light emitted by the radioactive material is used to stimulate the phosphor to emit light.

Rare earth luminescent material is a new type of environmentally friendly luminous powder newly developed in recent years, using China's unique rare earth luminescent substance refined, after being irradiated by ambient natural light, sunlight light, ultraviolet light, etc., the light energy is stored, and then slowly released in a fluorescent way after the light is stopped.

Other light-emitting balls, one is the use of electronic technology, that is, the hollow sphere has built-in light-emitting diodes and batteries or piezoelectric devices, with the help of elastic pressure or batteries to emit light; The second is the use of chemical substances built-in, chemical reaction to produce luminous light, mainly used for the party scene luminous rod or fishing fake bait.

Hazards of phosphor:

Luminous powder with radioactivity is mixed with radioactive substances in phosphors, and the rays emitted by radioactive substances are used to excite phosphors to emit luminescence.

Frequent inhalation of phosphors will cause "silicosis". A small amount of phosphor sticks to **, and it is also like dust, just wash it off with water. Frequent contact with phosphors, or phosphor slurries,** will become rough.

Phosphor has a certain amount of radiation to the body, so it is best not to contact it too much, and occasional contact is not a big problem.

The above content reference: Encyclopedia - Luminous Ball

The utility model discloses in order to overcome the existence of fluorescent luminous powder in the production of basketball in the prior art is directly sintered on the surface of the middle tire surface, it is easy to cause fluorescent luminous pattern light absorption, luminous unevenness, make the bright light emitted by basketball at night is not beautiful enough, simultaneously, the fluorescent luminous label of basketball is directly attached to the epidermis, then basketball in the process of use, it is easy to cause the shortcomings that fluorescent luminous label falls off, the technical problem to be solved by the utility model is to provide a kind of light absorption and luminescence uniformity, Fluorescent glow-in-the-dark basketball that does not easily fall off with fluorescent glow-in-the-dark labels. The utility model discloses is achieved by the following specific technical means: a fluorescent luminous basketball comprises an inner tank, filament-winding, a middle tire, an epidermis, a nozzle, a groove, a fluorescent luminous sticker, a main mark and a secondary standard; The outer surface of the inner tank is evenly wound with filament, the middle tire is bonded to the outer surface of the filament by hot melting, the outer surface of the middle tube is concave with multiple annular grooves, the fluorescent luminous sticker is attached to the groove through epoxy resin glue, the epidermis is bonded between the grooves by epoxy resin glue, the main standard and the sub-standard are adhered to the outer surface of the epidermis by heat transfer deep pressing, the inner tank is communicated with the nozzle, and the nozzle passes through the filament, the middle tire and the epidermis in turn, and the main and sub-standard are made of fluorescent luminous powder, transparent essential oil and toluene in a certain proportion.

Further, the outer surface of the fluorescent luminous patch is bonded with a transparent PU protective layer. Further, the depth of the middle groove is, and the width of the middle groove is. Further, the thickness of the fluorescent luminous strip is , and the width of the fluorescent luminous strip is.

Further, the transparent PU protective layer is. Further, the epidermis is provided with 8-12 pieces. Further, the inner tank is black rubber, the filament is a nylon filament for basketball, and the epidermis is rubber, synthetic leather or genuine leather.

Further, the thickness of the inner tank is, the filament winding is, the thickness of the middle tire is, and the thickness of the epidermis is. Compared with the prior art, the utility model has the following beneficial effects: the utility model achieves the effect that absorbs light and lumines evenly, and fluorescent luminous label is not easy to fall off.

1, the utility model discloses in order to overcome the fluorescent luminous powder directly in the tire surface texture sintering, it is easy to cause fluorescent luminous pattern light absorption, luminous unevenness, make the bright light that basketball is not beautiful enough at night; Through the depression of the outer surface of the middle tube, there are multiple annular grooves, and the fluorescent luminous strip is laminated in the groove through epoxy resin glue, which can effectively solve the above shortcomings, so as to achieve the effect of uniform light absorption and luminescence. 2, the utility model discloses in order to overcome the fluorescent luminous label of basketball is directly attached to the epidermis, then basketball in the process of use, can easily cause the defect that fluorescent luminous label falls off; The main standard and substandard are adhered to the outer surface of the epidermis by heat transfer deep pressing, and because the main standard and substandard are made of fluorescent luminous powder, transparent essential oil, and toluene in a certain proportion.

Bend the glow stick slightly, break the glass tube in the plastic tube, and gently shake it so that the two liquids are well mixed to glow. The shape of the glow stick is mostly strip-shaped, with a built-in glass tube interlayer, and the liquid inside and outside the laminated layer is bent, hitted, rubbed, etc., so that the glass is broken, causing the reaction of two internal compounds to cause the fluorescent dye to glow.

The liquid inside and outside the laminated glass tube of the glow stick glass tube is peroxide and ester compounds, which will react and produce energy to make the fluorescent dye shine.

Light sticks can be used in entertainment, night fishing, weddings, outdoor, military, engineering construction, underwater operations, concerts, etc.

The luminous time of the glow stick can range from 30 seconds to 48 hours, and the length of the luminous time is inversely proportional to the ambient temperature, which is non-toxic and harmless.

The principle of luminescence of glow sticks is that peroxides and esters react, and the energy after the reaction is transferred to the fluorescent dye, which then fluoresces.

In 2018, a glass tube interlayer was usually placed in the common glow sticks on the market, and the peroxide and ester compounds were isolated inside and outside, and the two compounds reacted to make the fluorescent dye glow.

Luminescence time. The duration of the glow stick is inversely proportional to the ambient temperature (i.e., the higher the ambient temperature, the shorter the glow time of the glow stick) and inversely proportional to the initial brightness of the glow stick (i.e., the brighter the glow stick is when it is just folded, the shorter the light emitting time).

According to these characteristics of the glow stick, we can inhibit the chemical reaction of the two liquids in the glow stick by placing it in a low temperature environment (such as refrigerator or freezer), and continue to use it after taking it out.