Wyniki wyszukiwania - Biblioteka Nauki

1

Influence of nanoparticles additivies on mechanical properties of fabric reinforced composites

100%

Suchy T. , Balik K. , Sucharda Z. , Cerny M. , Sochor M.

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tom Vol. 10, no. 69-72

1-2

2

Microstructure of chitosan-based, ZnO-doped antibacterial composite

80%

Ciołek L. , Biernat M. , Jaegermann Z. , Zaczyńska E. , Czarny A. , Jastrzębska A. , Olszyna A.

Engineering of Biomaterials

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2017

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tom Vol. 20, no. 143 spec. iss.

18

3

Acrylic composite materials modified with bee pollen for biomedical application

80%

Florkiewicz W. , Sobczak-Kupiec A. , Tyliszczak B.

Engineering of Biomaterials

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2017

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tom Vol. 20, no. 143 spec. iss.

27

4

Magnetic properties of magnetostrictive Tb0.3Dy0.7Fe1.9 / polyurethane composite materials

80%

Dobrzański L. , Tomiczek A. , Nabiałek A. , Stokłosa Z.

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2011

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tom Vol. 51, nr 2

97-102

EN

Purpose: The aim of this work was to obtain polyurethane matrix composite materials reinforced with Tb0.3Dy0.7Fe1.9 particles and to observe changes of magnetic properties and magnetostriction of samples with different particle size distributions of Tb0.3Dy0.7Fe1.9 powder and varying volume concentration. Design/methodology/approach: The studies was performed on composite materials with the polyurethane matrix reinforced with Tb0.3Dy0.7Fe1.9 powders. The morphology of powder was examined by scanning electron microscopy (SEM) and analysis of the grain distribution of Tb0.3Dy0.7Fe1.9 powder was made using the Mastersizer 2000 analyser. The changes of magnetostriction and magnetic properties, including hystersis loops and effective permeability with changing applied field are tested. Findings: Analysis establishes a direct connection between magnetic properties and structural characteristics of the Tb0.3Dy0.7Fe1.9 powder size, which was used as reinforcement phase. The increase of particle size distribution of Tb0.3Dy0.7Fe1.9 powder in composite materials amplify the magnetostrictive responses, moreover the change of magnetic properties as a function of volume fraction of Tb0.3Dy0.7Fe1.9 powder were confirmed. Research limitations/implications: Contributes to research on structure and properties of magnetostrictive composite materials with the polymer matrix reinforced with Tb0.3Dy0.7Fe1.9 powders. Practical implications: The polymer matrix in investigated composite materials causes growth of resistivity, limiting this way losses for eddy currents at the high operating frequency of the transducers. In addition the values of permeability of composite materials is nearly constant in investigated frequency range. Originality/value: The obtained results show the possibility of manufacturing the magnetostrictive composite materials based on the Tb0.3Dy0.7Fe1.9 particles, with desired properties in cost effective way in comparison to conventional giant magnetostrictive materials (GMM).

5

Software for composites industry

80%

Pest A.

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2015

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tom Vol. 2, no. 1 (2)

28--31

EN

Composite materials play a significant role not only in the automotive, aerospace, aviation and nautical industry, but their presence is also important in the production of furniture and sports equipment as well as in the energy industry. In this article described are solutions for computer aided design, computer aided manufacturing and computer aided inspection on example of Delcam’s software for the industries that use composite materials.

6

Injection molded composites with iron oxide addition

80%

Nowicka K. , Gryń K. , Kłodowski K.

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2016

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tom Vol. 19, no. 138 spec. iss.

115

7

Whey protein isolate-aragonite composites for bone tissue engineering

80%

Gupta D. , Kocot M. , Serafim A. , Jaegermann Z. , Talari A. , Riedel S. , Tryba A. M. , Stancu I. C. , Pietryga K. , Reilly G. , Pamuła E. , Douglas T. E. L.

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tom Vol. 21, no. 148

97

8

Estimation of Relative Crack Depth in Composite Beams Using Wavelet Analysis

80%

Katunin A.

Machine Dynamics Research

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2014

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tom Vol. 38, No. 1

39-46

EN

In this paper the method of crack detection, localization and estimation of its relative depth using wavelet analysis was presented. Basing on obtained results, which were based on the analysis with application of B-spline wavelet the consequences of inappropriate selection of wavelet order for the analysis was shown. In the case when the values of wavelet order were too low the detail coefficients were biased by the inappropriately filtered signal, which cause a significant increase of detail coefficients values in the location of a crack, while when the values of a wavelet order were too high the decrease of values of detail coefficients were observed due to the power losses caused by increased together with the wavelet order the length of effective support of a wavelet.

9

Biodegradable plastics

80%

Kozłowski M. , Kozłowska A.

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tom Vol. 81, nr 12

25-30

PL

Omówiono aktualny stan w zakresie produkcji, zastosowań oraz perspektyw rozwojowych tworzyw polimerowych ulegających degradacji w środowisku naturalnym. Omówiono rodzaje tych tworzyw, technologie otrzymywania i właściwości w porównaniu do wielko tonażowych tworzyw sztucznych. Przedstawiono wybrane wyniki własnych badań oraz inicjatywy badawcze Unii Europejskiej na przykładzie projektu BIOCOMP.

EN

Consumption of polymeric materials have increased worldwide for approximately 5 fold within recent 30 years (up to ca. 240 Mt) and this trend is expected to continue during following years. There should be 2 to 3 fold increase in plastics consumption, mainly due to increasing demand for plastics in developing countries. In parallel the amount of plastic waste will grow, demanding sound waste management in order to protect environment, health and living standards. Current practice for plastic waste management includes recovery and landfilling. Considering that sustainable development is the only viable social and economic model, one should reduce landfilling as much as possible. The European Union is planning to stop that practice in the year 2030.

10

Noise barriers from waste materials

80%

Kowalska E. , Pasynkiewicz S. , Żubrowska M. , Wielgosz Z.

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tom Vol. 81, nr 12

145-147

EN

Noise barrier or acoustic barrier it is the structure, or structure together with other material, that potentially alters the noise at a site from a BEFORE condition to an AFTER condition [1,2]. Solid walls or partitions, solid fences, earth mounds, earth berms, buildings, etc used to reduce noise, without eliminating it. A variety of materials may be used for noise wall panels, hi Table 1 are presented properties of noise barrier from different materials [3]. The viable technology of the construction material recycling should be provided an easy reference for future applications.

PL

Zaproponowano nowe materiały kompozytowe do wytwarzania ekranów akustycznych. Zawierają one odpady polimerowe, odpady opon samochodowych, odpady dywanów i tektury powlekanej, mączki drzewnej i fosfogipsu. Przedstawiono właściwości mechaniczne i akustyczne tych kompozytów, wykazując ich przydatność do zamierzonego celu.

11

Nonlinear optical properties of composites based on conductive metal-alkanoate liquid crystals

80%

Bugaychuk S. , Klimusheva G. , Garbovskiy Y. , Mirnaya T. , Ischenko A.

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tom Vol. 14, No. 4

275-279

EN

The dynamic holography in new composite materials based on a novel class of metal-alkanoate ionic liquid crystals (ILCs) is studied experimentally and theoretically. The composites are formed as a dielectric dye film covered by lyotropic metal-alkanoate ILC and ionic smectic glasses with doped dye molecules. The dynamic gratings are created by nanosecond pulses of double frequency Nd:YAP laser, the recording demonstrates fast erasure time of residual thermal gratings. The nonlinear optical properties are determined by the resonance nonlinearity in photosensitive centres of ILC. Note, that permanent relief gratings will be formed on a dielectric dye film only as well as in composite cells either with nematic LC or with polymers under action of pulsed laser radiation. Lyotropic ILC layer applied over the dye film provides the dynamic regime of grating recording in composite cells. We found a secondary thermal grating is much smaller, the conductive ILC matrix provides effective heat dissipation and erasure of this thermal grating. A theory of Raman-Nath self-diffraction holography on thin films followed from the wave equation and the nonlinear mechanism of absorption saturation is developed to explain experimental results.

12

Effect of double substituted m-barium hexaferrites on microwave absorption properties

80%

Lima R. C. , Pinho M. S. , Gregori M. L. , Nunes R. C. , Ogasawara T.

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tom Vol. 22, No. 3

245--252

EN

The complex permeability ( a?r*) and permittivity ( e?r*) of radar absorbing materials (RAMs) play a key role in determining the reflection and attenuation properties of incident microwaves. Their real (a?' and e?') and imaginary (a?'' and e?'') components and relationship with microwave absorbing properties have been investigated in the frequency range 8-16 GHz for doped M-type barium hexaferrites in polychloroprene (CR) matrices. Individual and simultaneous substitutions of Fe3+ ions by Co2+, Ti4+, and Mn3+, and of Ba2+ ions by La3+ and Na+ make possible the use of these materials as RAMs, due to frequency dependence of ??* of hexaferrite, responsible for the location of its natural resonance. A double substitution of Ba2+ and Fe3+ (LaNaCoTiMn-BaHF) resulted in the best microwave absorption (99.9%) at the frequency of 15 GHz.

13

Modelowanie procesu wytrzymałości na rozciąganie kompozytu drewno polimetakrylan metylu

80%

Kyzioł L.

Zeszyty Naukowe Akademii Marynarki Wojennej

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2006

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tom R. 47 nr 2 (165)

51-59

PL

Przedstawiono opis właściwości wytrzymałościowych drewna naturalnego i modyfikowanego PMM w zależności od kąta wycięcia próbek z graniaka oraz ilości polimeru zawartego w kompozycie. Do opisu zastosowano funkcję w postaci wielomianu drugiego stopnia ze współdziałaniami pierwszego i drugiego rzędu. Przyjęto plan badań trójwymiarowy statyczny zdeterminowany (PSDK-3). Wykorzystując testy statystyczne, zweryfikowano ich istotność. Weryfikacje zgodności opisu przeprowadzono metodami statystyczną i graficzną.

EN

The paper describes strength properties of natural wood and modified PMM dependent on the angle of cut off of samples and the amount of polymer contained in the composite. To describe them the function in the form of quadratic polynomial with cooperation of the first and second order was used. The three-dimensional statically determined testing plan (PSDK-32) was employed. Statistic tests were used to verify their significance. Description conformity was verified by means of statistic and graphic methods.

14

Biocompatibility of C-C composites covered with PyC and pHEMA

80%

Buresova M. , Balik K. , Machovic V. , Novotna M. , Pesakova V. , Hulejova H. , Sochor M.

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2002

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tom R. 5, nr 20

3-5

15

Bioszkło pochodzenia żelowego jako składnik kompozytów ze stopami metali

80%

Łączka M. , Cholewa-Kowalska K. , Dąbrowski J. R. , Oksiuta Z.

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2003

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tom R. 6, nr 29

20-23

16

Kompozyty kopolimeru P(LLA/GLA) z włóknem węglowym w warunkach dotkankowej implantacji - badania wstępne

80%

Cieślik T. , Adwent M. , Bajor G. , Chłopek J. , Sabat D. , Bielecka A.

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tom R. 6, nr 30-33

117-119

17

Composite rotor blades tests essential before mounting on gyroplane

80%

Sobieszek A. , Wojtas M.

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tom Vol. 23, No. 4

487--494

EN

The article presents the course of the composite rotor blades tests. Object of study was designed in Institute of Aviation, new airfoil for gyroplane rotors and technology of manufacturing carbon rotor blades were made. When the test program was developed, we focused for special test to check not only typical rotor blades properties but also composite structures thereby technology of manufacturing. One of the basic rotor blades test is to determine the breaking force, which, taking into account the safety factor, cannot exceed the maximum centrifugal force occurring on the rotor blades during flight. The first step of rotor blades tests was static test, which gave us answer about stiffness in plane of low stiffness and torsional stiffness, it’s very important properties related to vibrations. Another mechanical properties measured during tests were centre of gravity and mass moment of inertia in rotor blade. Next step was dynamic test – tracking and balancing verification. After static and dynamics, which has proper results – good balance and no vibration on the entire range of rotational speed – rotor blades can be use on fly object. After getting proper results of static and dynamic test next step was a specially prepared test, which defined the time needed for delamination to take place. During the delamination tests, the rotor blade was subjected to adequate loads that occur in horizontal flight. That kind of test is basis to determine service life of rotor blades.

18

Synthesis of new mesostructured cellular foams (MCFs) with NaY zeolite and their application to sorption of thorium ions

80%

Pikus S. , Zienkiewicz-Strzałka M. , Skibińska M.

Materials Science Poland

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2019

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tom Vol. 37, No. 3

488--495

EN

The paper presents the new way of preparation of MCF foams with NaY zeolite. Significant changes in the amount of micro and mesopores in relation to the amount of NaY zeolite and 1,3,5-trimethylbenzene (TMB) added during the synthesis was observed. It suggests the possibility of controlling the micro/mesopores ratio by applying the proposed method. Environmental aspects of using new MCF/NaY foams is related to the adsorption of thorium ions (Th+4). The term of “MCF/NaY materials” refers to the general name of the material without referring to the content and state of zeolite. The obtained materials were highly effective in relation to Th+4. The adsorption capacity was greater when the number of micropores was lower. The dependence of adsorption capacity of Th+4 ions on aluminum atoms content was also confirmed.

19

Granulat żużla ISP z huty cynku jako efektywny zamiennik frakcji piaskowej w kompozytach ciężkich o matrycy cementowej

80%

Rubin J. A.

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2008

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tom Vol. 42 nr 1

24-28

PL

W artykule przedstawiono wyniki badań nad możliwością kształtowania cementowych kompozytów ciężkich z odpadów hutniczych. Badania obejmowały określenie wpływu zastosowanych spoiw oraz kruszyw na końcowe cechy techniczne ww. kompozytów.

EN

In the paper the research findings on the potential of shaping heavy cement-composites from metallurgic waste materials were presented. The research included defining the influence of the applied binders and aggregates on the final technical parameters of the composites.

20

Vascular endothelial cells in cultures on metal/C:H composite films

80%

Bacakova L. , Noskova L. , Koshelyev H. , Biederman H.

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2004

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tom R. 7, nr 37

18-20

EN

Adhesion, proliferation and maturation of vascular endothelial cells in cultures derived from the bovine pulmonary artery (line CPAE) were studied on Ti/C:H or Ag/C:H films prepared on glass using dc magnetron plasma deposition. The concentration of Ti or AG in the films ranged from 0% to 20%. On Ag/C:H layers, increasing concentration of silver markedly decreased cell viability. Only samples with very low silver content allowed cell spreading and formation of continuous endothelial layer. Although long-term presence of this material in patient's organism would not be advantageous, antimicrobial effect of silver may be favorable for short term applications, e.g. coating of catheters. On Ti/C:H layers, the cells were similarly or more active in adhesion, proliferation and maturation than those on glass or pure amorphous carbon, respectively. This material could be suitable for long-term use in both soft and hard tissue surgery, e.g. for inner coating of vascular prostheses or surface modification of artificial bone implants.