94159-20-3

Upstream product

• 108-78-1 2,4,6-triamino-s-triazine 
• 11113-50-1 boric acid 

Relevant academic research and scientific papers

In situ molten phase-assisted self-healing for maintaining fiber morphology during conversion from melamine diborate to boron nitride

C3N6H6·2H3BO3 (M·2B) is a highly promising precursor of boron nitride (BN) fibers due to its eco-friendly and low-cost fabrication. However, it is still unclear why the fibers can maintain their morphology in spite of drastic weight loss (nearly 80 wt%) during M·2B-to-BN pyrolysis. Herein, an interesting cracking and self-healing behavior of the heated M·2B fibers was observed at initial pyrolysis. In situ formed molten boron oxide (B2O3) was figured out to be the healing agent for the cracks and subsequently merged into the continuous matrix enclosing melamine/melem molecules, which subsequently acted as a nitrogen source. The B2O3 matrix helped to keep the fiber morphology undamaged under the second weight-loss stage in the pyrolysis process. This strategy of taking advantage of the in situ formed molten phase for healing cracks offers detailed guidance to prepare defect-free M·2B-derived BN fibers and would be significant in defect repair for other ceramics.

Supramolecular hydrogen-bonded structure of a 1:2 adduct of melamine with boric acid

Boric acid (B) forms a 2:1 hydrogen-bond adduct, M.2B, with melamine (M), wherein, a finite tetrameric ribbon of boric acid forms hydrogen bonds with the nitrogen donor sites of M. Hydrogen-bonded layers of B and M in the bc-plane are connected by boric acid units along the a-axis to give a three dimensional structure. Interestingly, one of the amino groups of M does not participate in hydrogen bonding unlike all the hydroxyl groups of B.

A comprehensive experimental and theoretical study on BN nanosheets for the adsorption of pharmaceutical drugs

BN nanomaterials have revolutionized the scientific world with their outstanding physiochemical properties leading to far-fetched applicability in the field of adsorption. In this context, the present investigation dealt with the synthesis and characterization of BN nanosheets and their applicability for the adsorption of pharmaceutical drugs. BN nanosheets have exhibited excellent adsorption for levofloxacin, tetracycline, and curcumin. To get further insights into the feasibility of the adsorption of drugs over BN nanosheets and to scrutinize the interactions between the two, computations were performed within DFT formalism. The theoretical investigations unveiled the presence of hydrogen bonding and negative adsorption energies liable for favorable adsorption. The synthesized BN nanosheets had good biocompatibility and were proven to be proficient adsorbents for the sustainability of the environment.

Hydrogen sorption by porous materials composed of one to three elements selected from boron, carbon and nitrogen and metal modification to enhance the sorption

In order to develop novel hydrogen storage materials with high hydrogen capacity, layered compounds with high specific surface areas and large pore volumes, referred to as BN's, CN's and C's, were synthesized from B-, C- and/or N-containing substances thr

A novel B-C-N compound derived from melamine diborate

A new B-C-N compound has been synthesized by thermal decomposition of melamine diborate mixed metal Mg powder in Ar at 1273 K. XRD revealed that the product had turbostratic structure and approximate composition of that was B1.1C1.1N

Preparation method of superfine melamine borate

The invention relates to a preparation method of superfine melamine borate. The method comprises specific operation steps as follows: firstly, boric acid, melamine and deionized water are accurately weighed according to a formula, and boric acid and melamine are dissolved in the deionized water and uniformly stirred; a solution is added to a reaction kettle, a heating device is started to heat the solution, and the temperature is controlled to be 100-200 DEG C for 8-36 hours; finally, the solution is rapidly sprayed to the deionized water with the temperature being 20 DEG C through a spray nozzle, subjected to centrifugal separation and dried, and the superfine melamine borate is finally obtained. The superfine melamine borate prepared with the preparation method has small and uniform grain sizes; the superfine melamine borate has small influence on the mechanical property of polymer matrix and has high inflaming retarding efficiency.

Porous boron nitride coupled with CdS for adsorption-photocatalytic synergistic removal of RhB

Porous boron nitride (a-BN) modified by uniformly dispersed CdS photocatalysts was successfully prepared using a facile hydrothermal method, and probed by electron microscopy, X-ray diffraction and UV-vis diffuse reflection spectroscopy. Adsorption and photocatalytic activities were evaluated using high concentration Rhodamine B (RhB) as a target organic pollutant. The results show that after adding a small amount of CdS nanoparticles, the absorbent can self-regenerate with the assistance of visible light irradiation to photocatalytically degrade the organic pollutants adsorbed on the surface of a-BN/CdS. During the adsorption and photocatalytic process, boron nitride could supply a concentrated pollutant environment around CdS photocatalyst active sites. The optimal loading amount of CdS was observed to be 0.5 wt% with the best adsorption-photocatalytic synergistic efficiency, which was probably due to the better dispersion of CdS on a-BN support and the separation of photogenerated electron-hole pairs by negatively charged a-BN. The photocatalytic mechanism of the a-BN/CdS composite was also investigated by radical trapping experiments.

Machinable α-SiAION/BN composites

Dense machinable α-SiAlON/BN composites were fabricated by hot-pressing using turbostratic boron nitride (tBN) obtained from nitridation of melamine diborate. The tBN was added to the starting powders, or introduced as a coating that formed in situ on α-Si3N4 carrier powders during nitridation, and was subsequently converted to hexagonal boron nitride (hBN) during hot pressing by solution reprecipitation. These composites maintain high strength at 1000°C and their strength/hardness are much higher than similar composites prepared using commercial hBN powder, which yielded a coarser microstructure. Good machinability was achieved despite a flat R curve. The American ceramic society.