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Wpływ przepuszczalności powietrza tkaniny pokrycia na rozkład ciśnienia w skrzydle paralotni
No full text
TPU-based elctrospun nanofibers assembled with nonwoven structure for face mask’s application
No full textThe outbreak of Coronavirus Disease 2019 (COVID-19) has triggered great global public health
concerns. Face masks are essential tools to reduce the spread of SARS-CoV-2 from human to human.
However, there are still challenges with extending the serving life and maintaining the filtration
performance of the current commercial masks. Filters composed of ultrafine fibers with diameters down
to tens of nanometers have the potential to physically block viruses. The idea of developing an
electrospun membrane with these ultrafine fibers to be integrated into the mask seems an innovative
idea. A right mechanism must be developed to make it happen. This study presents the development of
an electrospun membrane on a non-woven support by using thermoplastic polyurethane (TPU) for face
masks
Hyperelastic modelling and simulation for forming process of the braided fabrics
No full textThe composite reinforcements preforming including complex deformability behaviours. Numerical
simulation analysis can effectively predict these behaviours and improve the preforming quality. Based
on the related theory of continuum mechanics, this paper proposes a hyperelastic constitutive model to
describe the nonlinear anisotropic mechanical behaviour of braided fabrics due to large deformation
during the forming process. The tensile strain energy generated by the warp and weft stretching and the
shear strain energy caused by the angle change between the warp and weft is considered in this model.
The parameters of the hyperelastic constitutive law are identified by the bias-extension test. And it’s
also used to simulate the forming process of the braided fabrics
Sustainable surface modification of textile with Ag-doped TiO2/polysiloxane nanocomposite for antibacterial, UV protection, and flame retardant properties
No full textIn this work, a cotton fabric with advanced photocatalytic and flame retardant properties was developed
by using Ag-doped TiO2 in combination with 3-(trihydroxysilyl)propyl methyl phosphonate (TPMP)
with a sustainable sol-gel/hydrothermal approach. Scanning electron microscopy (SEM) and energy
dispersive X-ray analysis (EDS) were used to confirm the successful application of Ag-doped TiO2 and
TPMP on the cotton fabric. The results of UPF, bacterial reduction against Escherichia coli and vertical
flammability test showed that the creation of Ag-TiO2+TPMP nanocomposite on the surface of the fibres
gave the cotton fabric superior antibacterial activity, very good UV protection and flame retardant
activity
Alchemium building completion works begin
No full textMore on the website „Życie Uczelni”– p.lodz.pl/enArtykuł zamieszczony jest w : Życie Uczelni : biuletyn informacyjny Politechniki Łódzkiej, nr 159, Luty 2022Pierwszy z budynków „Alchemium – magia chemii jutra” został uroczyście
otwarty we wrześniu ubiegłego roku. Właśnie rozpoczął się etap kończący
powstanie tej największej inwestycji Politechniki Łódzkiej.The first building „Alchemium
– the magic of tomorrow’s chemistry”
was officially opened in
September last year. The final
stage of this largest investment of
Lodz University of Technology has
just begun. The contractor, Alstal
Grupa Budowlana, was selected in
the tender for construction works
Dynamic analysis of steel mast under some environmental uncertainties
No full textA concise and factual abstract is required. The abstract should state briefly the purpose of the
research, the principal results and major conclusions. An abstract is often presented separately from the article,
so it must be able to stand alone. For this reason, references should be avoided, but if essential, then cite the
author(s) and year(s). Also, non-standard or uncommon abbreviations should be avoided, but if essential they
must be defined at their first mention in the abstract itself
Preliminary studies on the preparation and properties of chitosan nonwovens modified with acid vapors
No full textThe aim of the study was to develop methods for modifying chitosan nonwovens in the gas phase
(application of acid vapors). Organic and inorganic acids were used in the research. The time of treating
chitosan nonwovens with acid vapors ranged from 10 to 120 min. The conducted research has shown
that it is possible to modify chitosan nonwovens with the use of acid vapors (organic and inorganic). It
was found that the action of acid vapors does not have a destructive effect on chitosan fibers (SEM
tests), which means that the developed method can be applied to various forms of chitosan materials,
while the modification is carried out on the finished form.
Microbiological tests were used to investigate the activity and growth of the microorganisms, which
were related to the acids in the modified nonwovens. Only materials modified with acetic acid and
hydrochloric acid were found to have bacteriostatic properties against S. aureus and E. coli (gramnegative
and gram-positive bacteria). It was also found that chitosan formate significantly reduced the
number of colonies of S. aureus
Politechnika Łódzka z WOŚP
No full textArtykuł zamieszczony jest w : Życie Uczelni : biuletyn informacyjny Politechniki Łódzkiej, nr 159, Luty 2022Do 30. Finału Wielkiej Orkiestry Świątecznej Pomocy Politechnika Łódzka
przygotowywała się od dość dawna, uruchamiając ogromną kreatywność.
Piękna idea pomagania w leczeniu wzroku u dzieci sprawiła, że w styczniu
otworzył się worek pomysłów
