RHA™ anti-Melamine monoclonal antibody, clone MEL

Oxygen-containing carbon materials such as graphene oxide have been studied intensively for a decade because of the high oxygen content, which is beneficial to disperse carbon materials in solutions and to support either metals or metal oxides on carbon materials. However, various oxygen-containing functional groups exist on carbon materials and controlling the structures is almost impossible. In this work, phloroglucinol (PG), which has a symmetrical structure with three hydroxyl groups relative to six aromatic carbon atoms, was found to be the best precursor among PG, cyanuric acid, trimesic acid, and melamine because of the high yield (63 wt%) at 573 K even in an open system which is essential for mass production. The materials synthesized from PG also showed the high dispersibility and/or solubility in solvents (N-methyl-2-pyrrolidone andN,N-dimethylformamide) and the low temperature to form carbon materials (573 K), which can be explained from (002) and (10) in X-ray diffraction pattern. X-ray photoelectron spectroscopy, Fourier transform infrared spectrometer, carbon-13 nuclear magnetic resonance with the aid of calculation of both spectra and carbonization mechanisms revealed that the high solubility of carbonized PG originates from the presence of ether and cyclic ether, which were formed from dehydration of hydroxy groups, and also some remained hydroxyl groups in carbonized PG. Oxygen-containing groups in carbonized PG were effective as an antioxidant. In addition, the coating of carbonized PG on silica nanoparticles imparted conductivity and lubricity to silica nanoparticles. Graphic abstract

The preparation of oil absorption materials with both low-cost and high efficiency remains a great challenge. In this work, a waste epoxy resins (EPs) derived hydrophobic modifier was developed to fabricate high-efficient oil absorbents by simple dip-coating on melamine foam (MF). EPs were effectively degraded by acid digestion in mild condition to obtain the degradation products (DEPs) with a large molecular weight. DEPs can be directly used as a hydrophobic agent due to excellent hydrophobicity and processability. The resulting DEPs@MF exhibited excellent absorption performance for various oils or organic solvents with an ultrafast adsorption rate of 2 s and high oil absorption capacity of 116 g g(-1). Moreover, the absorbed oils can be recovered by simple mechanical extrusion, and the adsorption capacity of the DEPs@MF did not deteriorate even after it was reused for 10 times. Besides, an oil recovery unit was successfully designed to achieve continuous oil-water separation. This research not only provides a new approach to the preparation of highly efficient and reusable oil-absorbing materials, but also provides new insight into solving the increasingly serious problem of waste thermosetting polymers.