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Aerogel applications in textile materials
No full textThe production of materials that will provide the high-performance properties required by today's technology is important for many sectors. Apart from meeting clothing and shelter needs, there is a direct or indirect rising need for the use of advanced textile materials in many different areas. Compared to the conventional materials, aerogel materials attract attention due to their ultra-lightweight structure with superior properties such as high specific surface area, high porosity, low density, low dielectric constant, excellent sound, and heat insulation. In addition, for the functional use of aerogel materials in the industry, mechanical properties such as modulus of elasticity, tensile-compressive strength, shear modulus, and impact strength are also important. When the literature on aerogel since the early 1930s is examined, it is seen that the studies mostly focused on application areas and more economical production ways. Although the most established application of aerogels in textiles is to improve thermal insulation, it is seen that they are also used in water repellency, air and water permeability, acoustic insulation, prevention of electromagnetic radiation, protection against chemicals, flame retardancy and treatment of textile process wastes. In this article, besides general information about aerogel, current aerogel application examples in textile materials are also included
W Galerii Jutro
No full textArtykuł zamieszczony jest w : Życie Uczelni : biuletyn informacyjny Politechniki Łódzkiej, nr 159, Luty 2022Uczelnia techniczna nie powinna kojarzyć się wyłącznie z technologiami,
przemysłem i zastosowaniami inżynierii. Nic więc dziwnego, że Politechnika
Łódzka jest animatorem wielu różnych wydarzeń kulturalnych. „Życie Uczelni”
jest patronem medialnym Galerii Jutro działającej na Wydziale Technologii
Materiałowych i Wzornictwa Tekstyliów
Sorption properties of half-milano rib knit fabrics
No full textIn this research, the effect of the technical side of the fabric and the composition of the yarn on the
sorption properties of half-Milano rib knit fabrics was studied. Four types of yarns, 90% cotton 10%
antistatic PET, 80% cotton 20% antistatic PET, 70% cotton 30% antistatic PET, and 65% cotton 35%
antistatic PET were used to develop half-Milano rib knit fabrics. The developed samples were dyed and
treated with softener. The physical properties of the developed samples such as area density, course and
wale density and thickness were determined according to ISO 3801, EN 14971 and ISO 5084,
respectively. The water absorption capacity (%) and the water absorption time (s) of the samples were
measured according to the standard test method ISO 20158: 2018. It was concluded that the sorption
properties of the samples depend on the technical side of the fabric and the composition of the yarn.
Water absorption capacity was found to be more dependent on yarn composition than on fabric technical
side, and water absorption time was found to be more dependent on the fabric technical side
Influence of pre-treatment in an alkaline medium on binding chitosan and 2,3-dihydroxy butandionic acid on cotton and polyester/cotton substrate
No full textThe aim of this study was to investigate the binding success of chitosan to cotton and polyester/cotton
materials via 2,3-dihydroxy butanedioic acid with prior leaching in 8% NaOH. Microwave energy was
used in the preparation process, which due to its low energy potential, does not cause direct changes in
the structure of the material but contributes to the speed of chemical reactions [1,3,4]. Samples were
analyzed by spectroscopy with Fourier transform of infrared spectrum in the ATR technique.
Determination of breaking force and elongation of the fabric was tested according to the HR EN ISO
13934-1:2013. The antimicrobial efficacy of all samples was tested according to the AATCC 147
Modernisation of curricula in technical and smart textiles
No full textThe SMARTEX project frames in the Erasmus+ programme “Capacity Building in the field of Higher
Education”. The aim of the project is to support the modernisation and internationalisation of textile
curricula on bachelor level, in six Asian universities with the expertise of three European universities.
By reforming bachelor degree programmes in Asian HEIs in the area of technical and smart textiles, the
level of competences and skills will be improved and the competitiveness of graduates in the labour
market will be enhanced. All three Asian countries have very developed textile industry and require
highly educated personnel. Sharing of good practices and setting up joint initiatives strengthens the
cooperation between Asian and EU countries. The project runs for three years and has several phases:
analysis of the current curricula, updating and new development of courses in the areas of technical and smart textiles, implementing and evaluating the newly developed courses, international exchange of
students and staff
Model analityczny dla dużych ugięć płaskiej struktury tekstylnej o zmiennej sztywności zginania i jego weryfikacja z wykorzystaniem symulacji MES
No full textTraffic light control algorithms – the optimization of an intersection
No full textThis article presents the current state of knowledge on the optimisation
of traffic light control systems. It describes the most important and commonly
used traffic light control systems and the approaches for determining their
optimal solutions. This article also presents the authors’ empirical research
on a chosen intersection with particular a focus on time losses in given phase
of the cycle. The authors also propose a device which allows for collecting
and analysing the parameters of intersections in order to optimise the realtime
parameters and to use the phases of this cycle
Plan równości płci w PŁ
No full textArtykuł zamieszczony jest w : Życie Uczelni : biuletyn informacyjny Politechniki Łódzkiej, nr 159, Luty 2022Autor artykułu jest pracownikiem Działu Rozwoju Uczelni.Pod koniec grudnia 2021 r. rektor PŁ prof. Krzysztof
Jóźwik podpisał Plan równości płci w Politechnice
Łódzkiej. Przewiduje on zapewnienie równości
zgodnie z zasadami zawartymi w Europejskiej Karcie
Naukowca, koresponduje również z działaniami
realizowanymi w uczelni w związku z przyznanym
przez Komisję Europejską w 2016 roku logo
HR Excellence in Research
Comparison of the fineness and mechanical properties of hemp fiber conditionned in two different relative humidity environments
No full textBast fiber, like hemp, has an affinity for water [1,2]. The moisture content of hemp fiber increased with
the increasing of relative humidity [1]. The relative humidity changes the fiber properties [2,3] studied
by LPMT (Laboratoire de Physique et de Mécanique Textile) in Mulhouse, France. A comparison of the
fiber properties measured in two different relative humidity environments (30% and 60%) was studied.
The fiber was placed between two specific cardstock frameworks with glue. The fineness was
determined from the diameter measured with a projection microscope. Then, the tensile test was realised
with MTS® , tensile testing instrument, to determine the breaking force, strain and stress and the Young’s
modulus. The hemp fiber was manually extracted from unretted stem. The cultivar used was Santhica 27
cultivated in the East of France [4] by SADEF, a plant nutrition expert.
The impact of the relative humidity environment on the fiber properties was not constant. The tensile
tests realised in this study were not homogeneous. Dispersion of the results could be caused by bast fiber
multi-scale. The selection caused more variability of fiber properties than the relative humidity for hemp
fiber