نتایج جستجو برای: micro pore

تعداد نتایج: 154037  

2011
R Palacios P Formentin E Martinez-Ferrero J Pallarès LF Marsal

An efficient method based in template wetting is applied for fabrication of ordered Poly(9,9-dioctylfluorene) (PFO) nanopillars with b-phase morphology. In this process, nanoporous alumina obtained by anodization process is used as template. PFO nanostructures are prepared under ambient conditions via infiltration of the polymeric solution into the pores of the alumina with an average pore diam...

2017
Zhiqiang Liu Tianyu Zhu Hugo F. Lopez

In the metal cutting process, the friction and wear behavior between the cutting tool and machined surface is the most important factor that affects the surface quality and the service life of the cutter. The irregular pore structure of porous titanium alloy has changed its mechanical properties and the processing technology. The friction and wear mechanism of the cutting tool and the machined ...

Journal: :Biophysical journal 2004
Yariv Kafri David K Lubensky David R Nelson

The effect of sequence heterogeneity on polynucleotide translocation across a pore and on simple models of molecular motors such as helicases, DNA polymerase/exonuclease, and RNA polymerase is studied in detail. Pore translocation of RNA or DNA is biased due to the different chemical environments on the two sides of the membrane, whereas the molecular motor motion is biased through a coupling t...

2016
Thi-Hiep Nguyen Reiza Ventura Young-Ki Min Byong-Taek Lee

Polyvinyl alcohol gelatin hydrogels were fabricated using genipin as a crosslinking agent for bone regeneration application. Optimized formulation of PVA-GE hydrogel was fabricated using genipin as crosslinking agent. Characterizations such as FTIR, morphology, porosity, pore size, degradation and swelling rate were investigated. Bone regeneration potential of optimized genipin cross-linked pol...

Journal: :Langmuir : the ACS journal of surfaces and colloids 2006
Matthias Thommes Bernd Smarsly Matthijs Groenewolt Peter I Ravikovitch Alexander V Neimark

We report results of nitrogen and argon adsorption experiments performed at 77.4 and 87.3 K on novel micro/mesoporous silica materials with morphologically different networks of mesopores embedded into microporous matrixes: SE3030 silica with worm-like cylindrical channels of mode diameter of approximately 95 angstroms, KLE silica with cage-like spheroidal pores of ca. 140 angstroms, KLE/IL sil...

Journal: :Bioresource technology 2010
Solange I Mussatto Marcela Fernandes George J M Rocha José J M Orfão José A Teixeira Inês C Roberto

Different types of activated carbon were prepared by chemical activation of brewer's spent grain (BSG) lignin using H(3)PO(4) at various acid/lignin ratios (1, 2, or 3g/g) and carbonization temperatures (300, 450, or 600 degrees C), according to a 2(2) full-factorial design. The resulting materials were characterized with regard to their surface area, pore volume, and pore size distribution, an...

2011
R Palacios P Formentin E Martinez-Ferrero J Pallarès LF Marsal

An efficient method based in template wetting is applied for fabrication of ordered Poly(9,9-dioctylfluorene) (PFO) nanopillars with β-phase morphology. In this process, nanoporous alumina obtained by anodization process is used as template. PFO nanostructures are prepared under ambient conditions via infiltration of the polymeric solution into the pores of the alumina with an average pore diam...

Journal: :Computation 2016
Chao-Zhong Qin S. Majid Hassanizadeh Lucas M. Van Oosterhout

In the cathode side of a polymer electrolyte fuel cell (PEFC), a micro porous layer (MPL) added between the catalyst layer (CL) and the gas diffusion layer (GDL) plays an important role in water management. In this work, by using both quasi-static and dynamic pore-network models, water and vapor transport in the MPL and GDL has been investigated. We illustrated how the MPL improved water manage...

2008
Elena Aleksandrova Renate Hiesgen Emil Roduner

The proton conductivity of a Nafion 112 membrane is measured with a resolution of ca. 10 nm using Electrochemical Atomic Force Microscopy. The observations are compared with the Gierke model of the micro-morphology due to phase separation of the hydrophobic polymer backbone and the hydrophilic pendant groups. The results demonstrate a highly inhomogeneous conductivity distribution which is attr...

2014
Xi-Shu Wang Xing-Wu Guo Xu-Dong Li Dong-Yun Ge

In this paper, rotating bending fatigue tests of 2024-T4 Al alloy with different oxide coatings were carried out. Compared to the uncoated and previously reported oxide coatings of aluminum alloys, the fatigue strength is able to be enhanced by using a novel oxide coating with sealing pore technology. These results indicate that the better the coating surface quality is, the more excellent the ...

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