1 / 11

Melamine

Melamine. Melamine C 3 H 6 N 6. Properties. Melamine.

adanne
Télécharger la présentation

Melamine

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Melamine

  2. Melamine C3H6N6

  3. Properties

  4. Melamine • is an organic base and a trimer of cyanamide, with a 1,3,5-triazine skeleton. Like cyanamide, it contains 66% nitrogen by mass and, if mixed with resins, has fire retardant properties due to its release of nitrogen gas when burned or charred, and has several other industrial uses.

  5. Melamine combines with cyanuric acid and related compounds to form melamine cyanurate and related crystal structures, which have been implicated as contaminants or biomarkers in Chinese protein adulterations.

  6. Uses and Applications • Melamine is combined with formaldehyde to produce melamine resin, a very durable thermosetting plastic used in Formica, and melamine foam, a polymeric cleaning product. The end products include countertops, dry erase boards, fabrics, glues, housewares, dinnerware, cooking spoons, guitar saddles, guitar nuts, and flame retardants.

  7. Melamine also enters the fabrication of melamine poly-sulfonate used as superplasticizer for making high-resistance concrete. Sulfonated melamine formaldehyde (SMF) is a polymer used as cement admixture to reduce the water content in concrete while increasing the fluidity and the workability of the mix during its handling and pouring

  8. Advantage • nitrogen-rich compound • high nitrogen content (2/3). • making high-resistance concrete. • It results in concrete with a lower porosity and a higher mechanical strength exhibiting an improved resistance to aggressive environments and a longer life-time.

  9. Limitation • Melamine is much more expensive • Synthesis Crystallization and washing of melamine generates a considerable amount of waste water • Melamine poisoning by tainted food Melamine use as non-protein nitrogen (NPN) for cattle was described in a 1958 patent.[ Melamine has been involved in several food recalls after the discovery of severe kidney damages of children and pets poisoned by melamine-adulterated food.

  10. 5310751861   • YanikaChirachinta • 5310755847   • ParadaPruttitaiwa • 5310755763   • SirivalaiLaohaniwatworn

More Related