Artykuły (WTMiWT)
Stały URI dla kolekcjihttp://hdl.handle.net/11652/180
Przeglądaj
9 wyniki
collection.search.results.head
Pozycja Udział Politechniki Łódzkiej w programie IAEA(Wydawnictwo Politechniki Łódzkiej, 2020) Krucińska, Izabella; Ulański, PiotrPo wybuchu pandemii COVID-19 problemem w skali międzynarodowej stały się braki w zaopatrzeniu personelu medycznego, a także ogółu społeczeństwa, w sprzęt ochronny, między innymi maski ochronne. Powstało pytanie, czy komercyjnie dostępne typowe maski (z natury jednorazowe) z włókniny polipropylenowej mogą być w razie potrzeby sterylizowane i używane wielokrotnie.Pozycja Technologie bioresorbowalnych wyrobów medycznych – opracowane w wyniku realizacji projektu kluczowego „Biodegradowalne wyroby włókniste”(ZW CHEMPRESS - SITPChem Stowarzyszenie Inżynierów i Techników Przemysłu Chemicznego, 2014) Krucińska, Izabella; Boguń, Maciej; Chrzanowska, Olga; Kowalczuk, Marek M.Pod koniec 2008 r. rozpoczęto realizację projektu kluczowego pt. „Biodegradowalne wyroby włókniste”, POIG 01.03.01–00– 007/08 o akronimie BIOGRATEX. Projekt jest współfinansowany z funduszy strukturalnych w ramach Programu Operacyjnego Innowacyjna Gospodarka. Celem głównym projektu jest opracowanie innowacyjnych rozwiązań technologicznych, niezbędnych dla poszerzenia oferty wyrobów włóknistych produkowanych z użyciem polimerów biodegradowalnych, w większości pozyskiwanych z surowców odnawialnych, kierowanych nie tylko do sektora włókienniczego, ale również dla rolnictwa i medycyny. Celem niniejszej publikacji jest przedstawienie opisu trzech technologii odnoszących się do wyrobów przeznaczonych do zastosowań w medycynie regeneracyjnej. Opisano technologię formowania włókien z roztworu polimeru będącego kopolimerem L-laktydu i glikolidu (PGLA), którego syntezę opracowano w ramach projektu. Kolejna technologia dotyczy materiałów nanowłóknistych wytwarzanych metodą elektroprzędzenia z roztworu polimeru PGLA oraz z roztworu mieszaniny polimerów PGLA i hydroksymaślanu (PHB). Oba roztwory polimeru w DMSO przędziono z dodatkiem hydroksyapatytu (HAp). Wytworzony materiał włóknisty zaprojektowano do stosowania przy regeneracji tkanki kostnej, jako materiał osteokonduktywny, osteoinduktywny i bioresorbowalny. Trzecia opisana technologia odnosi się do wytwarzania prototypów bioresorbowalnych protez naczyń krwionośnych z PGLA o średnicach poniżej 6 mm. Przedstawiono możliwość zastosowania techniki elektroprzędzenia ze stopu polimeru wraz z wprowadzeniem dodatkowego procesu stabilizacji termicznej do wytwarzania struktur 3D o małych średnicach.Pozycja Printed Textiles with Chemical Sensor Properties(Instytut Biopolimerów i Włókien Chemicznych (IBWCh) , Łódź, Polska, 2014) Krucińska, Izabella; Skrzetuska, Ewa; Urbaniak-Domagała, WiesławaIn this study the authors proposed the introduction of chemical sensors directly on textile surfaces in the form of conductive transmission parts using the screen-printing technique. A liquid vapour-sensitive, printing surface made with the use of multi-walled carbon nanotubes was also evaluated. Carbon nanotubes show effective chemo-sensory properties because the chemical agent leads to changes in electrical conductivity. The research concerned the assessment of sensor efficiency for chemical incentives in the form of selected fluids and their vapours. The best sensory properties were observed for polar vapour at a level of relative resistance over 40%. In the case of vapours of non-polar fluids the sensory reaction of the printed fabrics is much weaker – at a level of relative resistance of about 25%. The printed textile backings subjected to the influence of a fluid show an immediate reaction, while in the case of fluid vapour the reaction occurs after a few seconds. Detection of the presence of dangerous chemical agents such as organic liquids and their vapour is possible by means of a structure composed of sensors.Pozycja New Method for Preparation of Biodegradable Medical Materials Characterised by Highly Developed Porous Structures(Instytut Biopolimerów i Włókien Chemicznych (IBWCh) , Łódź, Polska, 2014) Kowalska, Stanisława; Krucińska, Izabella; Komisarczyk, Agnieszka; Żywicka, BogusławaThis study addresses the preparation of biodegradable and highly porous materials with the chemical purity required for medical materials. The solution method for producing porous structures with table salt was modified through the application of plasticisers in the technological process. In this paper the term medical materials includes dressing and implantable materials as well as scaffolds for tissue culture. A new method is proposed using polymers such as poly(D,L-lactide) and dibutyrylchitin to produce porous structures with enhanced absorption properties.Pozycja In-Compost Biodegradation of PLA Nonwovens(Instytut Biopolimerów i Włókien Chemicznych (IBWCh) , Łódź, Polska, 2014) Gutowska, Agnieszka; Jóźwicka, Jolanta; Sobczak, Serafina; Tomaszewski, Wacław; Sulak, Konrad; Miros, Patrycja; Owczarek, Monika; Szalczyńska, Magdalena; Ciechańska, Danuta; Krucińska, IzabellaPresented in this work are the results of an investigation into the biodegradation of selected nonwoven materials made of commercial poly[(DL)-lactide] – PLA 6252D supplied by Nature Works® LLC, USA. The biodegradation was examined under laboratory conditions, simulating composting by the mass-loss method at constant process parameters: temperature t = 58 ± 2 °C, pH 7 and inoculum humidity W = 52.6%. The nonwovens examined, with a surface density of about 60 g/m2, revealed a varied crystallinity degree in the range of 10.4 - 35.6% and fibre diameter of 8.2 - 10.9 μm. The nonwovens were formed by the spun-bond method from a melt at 211 - 213 °C on a laboratory stand. The commercial PLA 6252D was also examined. The polymer PLA 6252D and nonwoven materials made thereof are entirely biodegradable in the research environment applied, and after 16 weeks of biodegradation weight loss in the materials reaches 100%.Pozycja Fabrication of Plga/Hap and Plga/Phb/Hap Fibrous Nanocomposite Materials for Osseous Tissue Regeneration(Wydawnictwo Politechniki Łódzkiej. Wydział Technologii Materiałowych i Wzornictwa Tekstyliów, 2014) Krucińska, Izabella; Chrzanowska, Olga; Boguń, Maciej; Kowalczuk, Marek M.; Dobrzyński, PiotrThe study presents the manufacturing of nanofibrous structures as osteoconductive, osteoinductive materials for osseous tissue regeneration. The fibrous structures were obtained by electrospinning of poly(l-lactide-coglicolide) (PLGA) with addition of hydroxyapatite (HAp) and of a blend of PLGA with polyhydroxybutyrate with HAp added. The polymers used in the experiment were synthesised by an innovative method with a zirconium catalyst. First, the optimal electrospinning process parameters were selected. For the characterisation of the obtained osseous tissue reconstruction materials, the physical, macroscopic, functional, mechanical and thermal properties as well as crystallinity index were studied. The study of the radiation sterilisation influence on average molar mass, thermal and mechanical properties was made in order to analyse the degradation effect.Pozycja Chemically Driven Printed Textile Sensors Based on Graphene and Carbon Nanotubes(MDPI, 2014) Skrzetuska, Ewa; Puchalski, Michał; Krucińska, IzabellaThe unique properties of graphene, such as the high elasticity, mechanical strength, thermal conductivity, very high electrical conductivity and transparency, make them it an interesting material for stretchable electronic applications. In the work presented herein, the authors used graphene and carbon nanotubes to introduce chemical sensing properties into textile materials by means of a screen printing method. Carbon nanotubes and graphene pellets were dispersed in water and used as a printing paste in the screen printing process. Three printing paste compositions were prepared—0%, 1% and 3% graphene pellet content with a constant 3% carbon nanotube mass content. Commercially available materials were used in this process. As a substrate, a twill woven cotton fabric was utilized. It has been found that the addition of graphene to printing paste that contains carbon nanotubes significantly enhances the electrical conductivity and sensing properties of the final product.Pozycja Biomechanical Studies of Novel Hernia Meshes with Enhanced Surface Behaviour(Instytut Biopolimerów i Włókien Chemicznych (IBWCh) , Łódź, Polska, 2014) Struszczyk, Marcin H.; Komisarczyk, Agnieszka; Krucińska, Izabella; Gutowska, Agnieszka; Pałys, Beata; Ciechańska, DanutaResearch on hernia implants, especially less-invasive implantation techniques, is an important focus of study around the world. Practitioners require that these elaborate structures, which are primarily designed using textile technology, possess biomimetic behaviour to significantly reduce post-implantation complications. Novel textile hernia implants are designed with surface modifications that prevent prosthesis migration after implantation. The specialised structural design and enhanced prosthesis surface with stitched loops enables increased surface contact with the fascia, which improves the integration of connective tissue with the prosthesis without overgrowth (thick scar formation). The main intra-operative clinical benefit of the novel implant is its potential utility in suture-less techniques. The aim of this study was to compare novel hernia implant designs to clinically proven, commercially available knitted hernia meshes in vitro. TEMA MOTION 3.5 software was used to analyse motion and estimate the tendency of the non-fixed implants to remain in a stable position at the sublay in a simulated hydrodynamic model of the abdominal wall hernia system.The mechanical resistance of the implant against simulated maximal intra-abdominal pressure, the height of the simulated abdominal wall in the reconstruction region and the curvature of the reconstructions were determined and compared with results obtained with commercial hernia meshes of low surface mass that differ in structure, stiffness and thickness.Pozycja Accelerated Ageing of Implantable, Ultra-Light, Knitted Medical Devices Modified by Low-Temperature Plasma Treatment - Part 2. Effect on chemical Purity(Instytut Biopolimerów i Włókien Chemicznych (IBWCh) , Łódź, Polska, 2014) Jóźwicka, Jolanta; Gzyra-Jagieła, Karolina; Gutowska, Agnieszka; Struszczyk, Marcin H.; Kostanek, Krzysztof; Cichecka, Magdalena; Wilbik-Hałgas, Bożena; Kowalski, Krzysztof; Kopias, Kazimierz; Ciechańska, Danuta; Krucińska, IzabellaThe impact of simulated storage conditions (accelerated ageing) for the chemical purity of innovative ultra-light textile implants (knitted) designed for use in urogynaecology and general surgery (procedures in the treatment of female incontinence, in hernia treatment and vagina plastic surgery) was estimated. The chemical purity of the knitted implants designed: untreated and with low-temperature plasma surface treatment in the presence of the fluoroorganic compounds was estimated. The acceptability of the risk related to the impact of storage conditions on the chemical purity of the implant products was simulated. The examination was based on Standard PN-EN ISO 10993-18:2008: “Biological evaluation of medical devices - Part 18: Chemical characterisation of materials” and was assessed in accordance with Polish and European standards.