scholarly journals Collision efficiency and colloidal stability of unequal size spherical particles moving through quiescent viscous liquid.

1987 ◽  
Vol 20 (5) ◽  
pp. 518-525 ◽  
Author(s):  
SHINICHI YUU ◽  
FUYUHIKO NAKAGAWA ◽  
HIROSHI MIHARA ◽  
YOSHIHIRO FUKUI
Keyword(s):  
Viscous Liquid ◽  
Colloidal Stability ◽  
Spherical Particles ◽  
Collision Efficiency ◽  
Unequal Size

Stretching and rupture of a viscous liquid bridge between two spherical particles

2020 ◽  
Author(s):  
Xiangqi Li ◽  
Dengfei Wang ◽  
Fenglei Huang ◽  
Ziqi Cai ◽  
Zhengming Gao
Keyword(s):  
Viscous Liquid ◽  
Liquid Bridge ◽  
Spherical Particles

scholarly journals THE NEW METHOD OF OBTAINING MICROFIBRILLATED CELLULOSE FROM SPRUCE WOOD

2020 ◽  
pp. 303-314
Author(s):  
Ol'ga Vladimirovna Yatsenkova ◽  
Andrey Mikhaylovich Skripnikov ◽  
Anton Aleksandrovich Karacharov ◽  
Elena Valentinovna Mazurova ◽  
Sergey Aleksandrovich Vorob'yev ◽  
...  
Keyword(s):  
Colloidal Stability ◽  
Aqueous Suspension ◽  
High Surface ◽  
High Water ◽  
Microfibrillated Cellulose ◽  
New Method ◽  
Spherical Particles ◽  
Spruce Wood ◽  
Long Time ◽  
Acetic Acid Water

The new method of producing of microfibrillated cellulose (MFC) from spruce wood was described. This method includes the stages of cellulose obtaining by peroxide delignification of wood in the medium “acetic acid-water-H2SO4 catalyst” and cellulose acid hydrolysis, ultrasonic treatment, and freeze drying. The structure of cellulosic products was studied by FTIR, XRD, SEM, AFM, dynamic light scattering methods. The particle size of final cellulosic products is characteristic of microfibrillated cellulose according to the TAPPI Standard WI 3021 classification. The particles of the MFC are characterized by a rather high surface charge, and its aqueous suspension showed a high colloidal stability for a long time. According to the AFM data the surface of the microfibrillated cellulose film is formed by homogeneous spherical particles with a diameter about 80 nm and does not contain external inclusions. The new method of obtaining MFC from spruce wood is less energy-consuming and more environmentally friendly compared to traditional technologies due to single-stage production of high quality cellulose without the use of sulfur- and chlorine containing delignifying agents, increased pressure and high water consumption.

Benzylamine Tartrate as an Organic Glass Substrate for Carbon Films by Evaporation

1970 ◽  
Vol 28 ◽  
pp. 484-485
Author(s):  
A. C. Faberge
Keyword(s):  
Vapor Pressure ◽  
Viscous Liquid ◽  
Glass Substrate ◽  
Room Temperature ◽  
Carbon Film ◽  
Carbon Films ◽  
Organic Glass ◽  
Spectroscopic Examination ◽  
Polymeric Substrates

Benzylamine tartrate (m.p. 63°C) seems to be a better and more convenient substrate for making carbon films than any of those previously proposed. Using it in the manner described, it is easy consistently to make batches of specimen grids as open as 200 mesh with no broken squares, and without individual handling of the grids. Benzylamine tartrate (hereafter called B.T.) is a viscous liquid when molten, which sets to a glass. Unlike polymeric substrates it does not swell before dissolving; such swelling of the substrate seems to be a principal cause of breakage of carbon film. Mass spectroscopic examination indicates a vapor pressure less than 10−9 Torr at room temperature.

STEM Study of Surface Plasmon Excitation in Small Spherical Particles

1990 ◽  
Vol 48 (2) ◽  
pp. 42-43
Author(s):  
Daniel UGARTE
Keyword(s):  
Energy Loss ◽  
Spherical Particles ◽  
Small Particles ◽  
Bulk Materials ◽  
Low Loss ◽  
Plasmon Excitation ◽  
Surface Modes ◽  
Surface Plasmon Excitation ◽  
Analytical Electron ◽  
Analytical Electron Microscope

Small particles exhibit chemical and physical behaviors substantially different from bulk materials. This is due to the fact that boundary conditions can induce specific constraints on the observed properties. As an example, energy loss experiments carried out in an analytical electron microscope, constitute a powerful technique to investigate the excitation of collective surface modes (plasmons), which are modified in a limited size medium. In this work a STEM VG HB501 has been used to study the low energy loss spectrum (1-40 eV) of silicon spherical particles [1], and the spatial localization of the different modes has been analyzed through digitally acquired energy filtered images. This material and its oxides have been extensively studied and are very well characterized, because of their applications in microelectronics. These particles are thus ideal objects to test the validity of theories developed up to now.Typical EELS spectra in the low loss region are shown in fig. 2 and energy filtered images for the main spectral features in fig. 3.

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