检索结果-南通市图书馆

On the ζ-Potential of Nanodiamond in Aqueous Systems

在线全文

学校读者我要写书评

暂无评论

引用

Journal of Materials Science & Technology 2004年第4期20卷 469-471页

作者： yongweizhu XiangqianSHEN ZhijingFENG XiangyangXU BaichunWANG DepartmentofPrecisionInstruments&Mechanology TsinghuaUniversityBeijing100084China R&DCenter ChangshaResearchInstituteofMiningandMetallurgyChangsha410012China

Several factors affecting the ζ-potential of nanodiamonds were studied. The Chemical Mechanical Modification (CMM) of surface, different surfactants and its dosage, and inorganic ions on the ζ-potential of nanodiamond sample L were studied using ZETASIZER3000HS and Nexus470. Results show that the ζ-potential changes with its parameters of detonation synthesis and purification. Results also suggest that CMM and subsequent treatments employed can alter apparently the ζ-potential and that some anionic surfactants increase the absolute value of the ζ-potential in the alkaline surrounding.

关键词： Nanodiamond ζ-potential Suspension Surfactant

SURFACE MODIFICATION AND DISPERSION OF NANODIAMOND IN CLEAN OIL

在线全文

学校读者我要写书评

暂无评论

引用

China Particuology 2004年第3期2卷 132-134页

作者： yongweizhu XiangyangXu BaichunWang ZhijingFeng Research&DevelopmentCenter ChangshaResearchInstituteofMiningandMetallurgyChangsha410012P.R.China DepartmentofMaterialsScienceandEngineering Central-SouthUniversityChangsha410083P.R.China

The effect of different kinds of surfactants on the size distribution of nanodiamond particles in clean oil was studied. Results show that the dispersing stability of nanodiamond modified with surfactants YS-1 and SB-18 simulta-neously is much better than those modified with either of them because of synergism of the surfactants. And the particle size distribution in the system can be improved remarkably after the adoption of hyperdispersants such as SA-E and SA-F. Anchoring groups of those hyperdispersants can be bonded with the particle surface by chemical and/or hydrogen bonding and their soluble chains are well compatible with the dispersion media. As a result, the particles are uniformly distributed in the system owing to the steric stabilization. A very stable clean-oil based nanodiamond suspension with an average particle size of around 53.2 nm was prepared.

关键词： surface modification nanodiamond particle clean oil dispersion

DISPERSION OF NANODIAMOND AND ULTRA-FINE POLISHING OF QUARTZ WAFER

在线全文

学校读者我要写书评

暂无评论

引用

China Particuology 2004年第4期2卷 153-156页

作者： yongweizhu ZhijingFeng BaichunWang XianyangXu ResearchandDevelopmentCenter ChangshaResearchInstituteofMiningandMetallurgyChangsha410012China Authortowhomcorrespondenceshouldbeaddressed DepartmentofPrecisionInstrumentsandMechanology TsinghuaUniversityBeijing100084China

Mechanochemical Modification (MCM) of nanodiamond surface with DN-10 was studied in relation to the performance of nanodiamond in polishing quartz wafers. Results show that the modified nanodiamond is more stable in the pH range 8~11. A super smooth surface with an average roughness of 0.214 nm was achieved using a nanodia-mond-based slurry regulated by N-(2-hydroxyethyl)ethylenediamine. It is suggested that the principal ultra-fine polishing mechanism of quartz wafer involves atom-level removal under the synergism of chemical and mechanical actions.

关键词： nanodiamond dispersion mechanochemical modification ultra-fine polishing quartz wafer