Morphology and Hydrophobicity of Humic Coatings on Glass as Studied by Atomic Force Microscopy (AFM) and Contact Angle Measurements
In nature,many functional nanoarchitectures are self-assembled due to supramolecular interactions of natural organic matter and surfaces of mineral particles.However,direct evidence for molecular mechanisms responsible for these interactions is still missing.Here,we developed silanol-derivatives of humic substances capable of self-assembling onto hydroxylated surfaces.By using humic substances from peat and coal and DNA array glass slides,we show that humic adlayers were homogeneous on macroscale,but separated into domains of nanosize in coal HS and submicro-size in peat HS.The peat adlayers were characterized with larger roughness of 11 run versus 5 nm for coal.Measurement of the contact angle showed that application of humic coatings leads to an increase in hydrophobicity of glass.It was shown that treatment of soil aggregates with silanol derivatives of humic acids increases water stability of the aggregates.
Humic Coating Water-solid interface Hydrophobicity Morphology AFM
A.B.Volikov V.A.Lebedev E.V.Lazareva A.M.Parfenova S.A.Ponomarenko I.V.Perminova
Department of Chemistry,Lomonosov Moscow State University,Moscow,Russia Department of Materials Science,Lomonosov Moscow State University,Moscow,Russia Enikolopov Institute of Synthetic Polymeric Materials of Russian Academy of Sciences,Moscow,Russia
国际会议
the 16th Meeting of the International Humic Substances Society (第十六届国际腐殖物质学会大会(IHSS 16))
杭州
英文
162-164
2012-09-09（万方平台首次上网日期，不代表论文的发表时间）