Synthesis of carboxymethyl chitosan-functionalized graphene nanomaterial for anticorrosive reinforcement of waterborne epoxy coating.

In this study, a carboxymethyl chitosan functionalized graphene (CMCS-rGO) nanomaterial was successfully synthesized in aqueous solution by non-covalent functionalization method. Fourier transform infrared, Raman, ultraviolet visible spectroscopy and thermogravimetric analysis confirmed that carboxymethyl chitosan had been successfully anchored on the surface of graphene. In addition, the CMCS-rGO was used as an anticorrosive nanofiller to be added to waterborne epoxy (EP) coatings to protect steel substrates.

A less harmful system of preparing robust fabrics for integrated self-cleaning, oil-water separation and water purification.

Although the development of constructing oil-water separation materials is quick, the defects of using harmful regents, weak stability and single function still exist. Here, we report an effective and less-harmful system with poly-dimethylsiloxane (PDMS)/ZnO composite solution to fabricate robust superhydrophobic surfaces for oil-water separation and removal of organic pollutant. The obtained samples were characterized by a range of instruments.

[Chemical constituents and bioactivity of Teucrium pilosum].

Objective: To study the chemical constituents and bioactivity of Teurium pilosum.

Method: Various column chromatographic techniques were used to isolate the constituents. A combination of EI-MS, NMR spectroscopy and X-Ray were applied to identify the structures.

[Study on liposoluble constituents of Teucrium labiosum].

Objective: To Study liposoluble constituents of Teurium labiosum.

Methods: The constituents were isolated and purified by silica gel column and Sephadex LH-20 chromatography. Their structures were elucidated by physicochemical properties and spectral analysis.

5,7-Dihydroxy-6,4'-dimeth-oxyflavone.

In the title compound, C(17)H(14)O(6), the benzopyran ring system is essentially planar and forms a dihedral angle of 6.84 (4)° with the other benzene ring. In the crystal structure, centrosymmetrically related mol-ecules are linked into dimers by O-H⋯O hydrogen bonds.