Temat: 66.30.Pa - Prolib Integro

Skocz do pozycji: 1.

Tytuł:: Experimental Evaluation of $CO_2//N_2$ Mixture Separation by Multi-multi-walled Carbon Nanotube
Autorzy:: Khalili, S.
Ghoreyshi, A.
Jahanshahi, M.
Davoodi, M.
Tematy:: 61.46.Fg
64.75.Jk
66.30.Pa; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Powiązania:: https://bibliotekanauki.pl/articles/1399700.pdf Link otwiera się w nowym oknie
Opis:: In order to examine the ability of multi-multi-walled carbon nanotube for $CO_2$ separation from flue gas, uptakes of $CO_2$ and $N_2$ were measured at temperatures of 288 K, 298 K and 308 K over the pressure range 1 to 40 bar using volumetric method. The experimental data was fitted by the Langmuir and Frendlich model isotherms. The same shape of isotherms introduced a common mechanism of adsorption but the amount of $CO_2$ adsorbed on multi-multi-walled carbon nanotube was 2.5 times higher than $N_2$ adsorption which indicated the possibility of $CO_2$ removal from flue gases using adsorption process with multi-multi-walled carbon nanotube as the adsorbent. Isosteric heat of adsorption was evaluated from a set of isotherms based on the Clausius-Clapeyron equation.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Barrier Properties of Coated and Laminated Polyolefin Films for Food Packaging
Autorzy:: Lazić, V.
Budinski-Simendić, J.
Gvozdenović, J.
Simendić, B.
Tematy:: 82.35.Lr
66.30.Pa
82.80.Bg
68.60.-p; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Powiązania:: https://bibliotekanauki.pl/articles/1538171.pdf Link otwiera się w nowym oknie
Opis:: The food packaging industry demands polymer films possessing a defined barrier against permeation of gases, moisture and flavor. The objective of this study was to assess the differences between the barrier properties of coated and un-coated polyolefine films. Eight types of packaging films are prepared by standard industrial procedure by cast film extrusion processing with chill rollers: biaxially oriented polypropylene (BOPP), BOPP coated by acrylic copolymer, metallized BOPP by aluminum, and low-density polyethylene (LDPE). The influence of lamination and metallization on the gas molecules ($CO_{2}$, $O_{2}$ and $N_{2}$) was determined by Lyssy's method. The moisture transparency was assessed according to the gravimetric method. The substantial differences between the barrier properties of the coated and un-coated films were estimated. It was estimated that the lamination process improves the oxygen barrier but not necessarily the moisture barrier, due to the different mechanisms for oxygen and moisture permeability. The obtained barrier properties data were considered from a practical point of view. It was concluded that films based on metallized BOPP has excellent barrier properties and can be used to over wrap food products.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Brownian Movement of Inorganic Nanoparticles in Sediments
Autorzy:: Fornal, P.
Stanek, J.
Tematy:: 05.40.Jc
64.75.Xc
47.57.ef
66.30.Pa
87.64.kx; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Powiązania:: https://bibliotekanauki.pl/articles/1506300.pdf Link otwiera się w nowym oknie
Opis:: The 100 nm particles of $Fe_{2}O_{3}$ and metallic Fe sedimented jointly with $Al_{2}O_{3}$ powder from their suspension in oleic acid exhibit distinguished mobility which depends on the concentration of aluminum oxide. This observation is interpreted as the result of the interparticle Fe-Fe magnetic interactions which lead to the formation of the rigid network of magnetic metallic iron nanoparticles.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Analytical study of durability and contact characteristics of metal-polymer composite sliding bearings for means of transport
Autorzy:: Chernets, Myron
Wrona, Rafał
Chernets, Yuriy
Tematy:: metal-polymer sliding bearings
analytical method
polyamides
PA6
PA66
PA6+30GF
PA6 + 30CF
PA6 + MoS2
PA6 + oil
Young's modulus
wear resistance
coefficient of friction
durability
contact parameter
łożyska ślizgowe metal-polimer
metoda analityczna
poliamidy
PA6 + olej
moduł Younga
odporność na zużycie
współczynnik tarcia
trwałość
parametr s kontaktu; Pokaż więcej
Wydawca:: Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Powiązania:: https://bibliotekanauki.pl/articles/58909502.pdf Link otwiera się w nowym oknie
Opis:: The field of application of metal-polymer bearings is vast: transport of various types, processing industry equipment, medical equipment, various types of maintenance equipment, etc. With the use of the developed generalized author's analytical method of metal-polymer plain bearings on the basis of which it is laid the author's research methodology of materials wear kinetics at sliding friction (dry, lubricated), calculation of their durability is carried out. Contact parameters are also determined. Metal-polymer bearings with a bushing made of PA6, PA66 polyamide and PA6 based composites filled with glass (PA6 + 30GF) and carbon (PA6 + 30CF) dispersed fibres, molybdenum disulphide (PA6 + MoS2) and oil filled cast polyamide (PA6 + oil) are considered. These polyamides (unfilled and filled), as self-lubricating materials, are widely used in this type of dry friction sliding bearings. The predictive estimation of durability of investigated bearings depending on loading, polymer materials Young's modulus, their wear resistance and sliding friction coefficient is executed. Regularities of change from the specified factors of bearing's durability and the maximum contact pressures are established. Experimental indicators, diagrams, and wear resistance characteristics of the specified polymeric materials are presented. The results of researches of sliding friction coefficient and modulus of elasticity for carbon steel (0.45%C) – polyamides tribocouples are presented.
Dostawca treści:: Biblioteka Nauki

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