Comparison of binder influence and rigidity on knitting fabrics treated with PCMs by padding and coating

[EN] Nowadays the majority of textile industries are not able to characterize or to study the process of adhering the microcapsule to the fibre's surface. There are various industrial processes to apply PCM's microcapsules, but determining optimal amounts of products, temperature, conditions and other process variables are an important challenge for the textile sector in order to achieve the highest depositions and retention of this type of microcapsules. This work is focused on determining and quantifying presence PCMs microcapsules when applied onto fabrics by two systems padding and coating and determining which method is the most effective. Also, the influence of the concentration of resin used in the formulation on the flexural rigidity of the fabric has been studied.Dirlik-Uysal, ÇD.; Bou-Belda, E.; Bonet-Aracil, M.; Belino, N.; Díaz-García, P.; I. Montava (2017). Comparison of binder influence and rigidity on knitting fabrics treated with PCMs by padding and coating. IOP Conference Series Materials Science and Engineering. 254:1-5. doi:10.1088/1757-899X/254/12/122003S1525

Wpływ rozkładu przędz srebrzonych na właściwości elektryczne i ekranujące tkanin lnianych

The aim of the research was to investigate the influence of silver coated yarns incorporated into fabric on the electrical and shielding properties of textile materials designed to ensure protection against the risk of harmful electromagnetic fields as well as thermophysiological comfort in a warm climate. The wearing comfort of conductive textiles is poor due to the chemical nature of synthetic fibres and coatings usually used in their production. In order to solve the problem, natural flax fibres that have good antistatic, hygienic and wearing comfort properties were used as a base for electroconductive textiles. This paper presents the research of these newly developed conductive textile materials. The content of the experimental investigations consisted of determination of the electrical conductivity, electromagnetic interference (EMI) shielding of the materials designed, and an analysis of measurement results. From the results obtained, it can be concluded that not only the amount of conductive additive (in this case –silver) but also the distribution of conductive yarns in woven flax fabric influence the electrical properties, such as electromagnetic wave shielding and electrical conductivity. Correlations between the shielding effectiveness and electrostatic properties are also discussed.Celem badań było określenie wpływu przędz srebrzonych wprowadzonych do tkaniny na jej właściwości elektryczne i ekranujące. Materiały projektowano dla zapewnienia ochrony przed szkodliwym działaniem fal elektromagnetycznych, a jednocześnie zapewniających termo-fizjologiczny komfort w ciepłym klimacie. Komfort noszenia ubrań wykonanych z włókien syntetycznych jest niski i dlatego do badanych tkanin wybrano włókna lniane, posiadające dobre właściwości antystatyczne i higieniczne zapewniające dobry komfort noszenia. W strukturę lnianych tkanin zostały wprowadzone srebrzone przędze w różnej konfiguracji i gęstości wprowadzenia. Badano czas półzaniku przyłożonego napięcia oraz stopień ekranowania przed falami elektromagnetycznymi emitowanymi przez blisko położone źródło fal elektromagnetycznych. Stwierdzono korelację pomiędzy właściwościami elektrostatycznymi a zdolnością ekranowania. Analizując wyniki stwierdzono, że zdolność ekranowania zależy nie tylko od ilości wprowadzonych przędz przewodzących, ale również od ich konfiguracji w tkaninie

SARS‐CoV‐2‐specific humoral and cellular immunity persists through 9 months irrespective of COVID‐19 severity at hospitalisation

Objectives Humoral and cellular immunity to SARS-CoV-2 following COVID-19 will likely contribute to protection from reinfection or severe disease. It is therefore important to characterise the initiation and persistence of adaptive immunity to SARS-CoV-2 amidst the ongoing pandemic. Methods Here, we conducted a longitudinal study on hospitalised moderate and severe COVID-19 patients from the acute phase of disease into convalescence at 5 and 9 months post-symptom onset. Utilising flow cytometry, serological assays as well as B cell and T cell FluoroSpot assays, we assessed the magnitude and specificity of humoral and cellular immune responses during and after human SARS-CoV-2 infection. Results During acute COVID-19, we observed an increase in germinal centre activity, a substantial expansion of antibody-secreting cells and the generation of SARS-CoV-2-neutralising antibodies. Despite gradually decreasing antibody levels, we show persistent, neutralising antibody titres as well as robust specific memory B cell responses and polyfunctional T cell responses at 5 and 9 months after symptom onset in both moderate and severe COVID-19 patients. Conclusion Our findings describe the initiation and, importantly, persistence of cellular and humoral SARS-CoV-2-specific immunological memory in hospitalised COVID-19 patients long after recovery, likely contributing towards protection against reinfection.Medicin