Dihydroxyethylglycine, or bicine for short, is a polyol glycine analogue that is commonly used as a biological buffer in biochemical assays, cosmetics, or coatings. In addition, Bicine can also be used to modify some new materials, such as to reduce metal aluminum ions in the polymeric material polyetherketone ketone (PEKK).
Dihydroxyethylglycine bicine reagent raw material.
Bicine complexes metal ions
We know that when bicine is used as a buffer, it has a stronger or weaker complexing ability to a part of metal ions, which is a characteristic of its molecular structure. The bicine molecule contains two alcohol hydroxyl groups, a carboxyl group, and lone electron pairs on the hypoaminonitrogen atom, which can form coordination bonds with some metal ions, and can complex (chelate) specific metal ions, which can remove some metal ions in the system. Therefore, it is used to reduce aluminum ions in the crude refining process of polyetherketone ketone.
Introduction to polyetherketone ketone
This is a polyaryl ether polymer composed of a repeating unit containing two ketone bonds and one ether bond in the backbone structure, which is a special polymer material. PEKK has excellent resistance to extreme environments (aerospace and oil extraction) with an extremely high melting point (300 -360, softening point 168), chemical and corrosion resistance;The tensile strength is 132 148MPa, which can be used as a high-temperature resistant structural material and electrical insulating material, the hardness is comparable to that of metal and the weight is lighter, non-flammable and does not produce toxic gases;It is highly moldable above the melting point and can also be processed into tubes or films using injection molding or extrusion processes.
Bicine chelatesPolyetherketone ketone in crude productsAluminium ions
1.The crude polyetherketone ketone was mixed with the ethanol solution of diphenyl sulfone, and the temperature was raised and refluxed
2.Dihydroxyethylglycine aqueous solution was added to the above-mentioned system, and the temperature reflux was continued, and the polyetherketone ketone primary product was obtained after cooling
3.The primary product of polyetherketone ketone and deionized water were put into a container for sonication, and the ultrasonic material mixture was filtered with a centrifuge to remove the water, and dried to constant weight under a vacuum of 130 degrees to obtain the purified polyetherketone ketone.
After the polyetherketone ketone was fully swollen in the ethanol solution of diphenyl sulfone, it was chelated with bicine aqueous solution, and combined with high-frequency ultrasonic treatment, the metal aluminum ions in the crude polyetherketone ketone were reduced to less than 30ppm, and the stability of polyetherketone ketone was significantly improved at high temperature.