4466 research outputs found
Sort by
Development of ozone effecting system without using harmful chemicals
No full textRecently, new bleaching methods are developed and presented as an eco-friendly alternative for the
traditional bleaching processes. Traditional bleaching chemicals such as sodium hypochlorite,
potassium persulfate, potassium permanganate, hydrogen peroxide, sodium perborate, sodium
percarbonate, and benzoyl peroxide is harmful to human health and the environment. In this study, new
eco-friendly and sustainable denim bleaching processes are developed. Textile washing and giving
effect process is provided by using only ozone with different techniques without using any harmful
chemicals. In terms of both technical and visual aspects, successful results have been obtained in
comparison with the traditional method in ozone technology. With this new method, the processing time
has been shortened and the water consumption has been reduced by about 53%
Nagrody w konkursie SITPChem
No full textArtykuł zamieszczony jest w : Życie Uczelni : biuletyn informacyjny Politechniki Łódzkiej, nr 159, Luty 2022W kameralnych – wymuszonych pandemią – warunkach reprezentacyjnej sali
konferencyjnej Alchemium wręczono nagrody i dyplomy w Konkursie Oddziału
Łódzkiego SITPChem na najlepszą pracę dyplomową z chemii w roku akademickim
2019-2020. Wszyscy laureaci pochodzą z Wydziału Chemicznego PŁ
Knowledge-based personalized pattern design of legging for mass customization using support vector machine modelling
No full textIn this study, we proposed a knowledge-based intelligent approach for pattern design of personalized
garment toward mass customization using support vector machine modelling. This approach has been
described and validated in the scenario of personalized legging design. The proposed models have been
set up by learning from quantitative relationships between garment structure lines and controlling points,
and then simulated for pattern parameters prediction. Finally, the performance of the presented approach
was compared with the traditional grading method. From the experimental results, the design effect of
the proposed approach is equivalent to the existing grading method. It indicates that our approach
provides a feasible and valuable solution for promoting the personalized garment pattern design and
facilitating the process of garment mass customization
The Possible Usage of Bayesian Networks for Predicting Toxicity of Chemical Compounds
No full textBayesian Belief Networks (BBN) are a graph structure for representing the
relationships between descriptors and a target variable in a given data set. This
study investigated the use of this algorithm in modeling the Quantitative Structure-
Activity Relationship (QSAR) of chemical compounds using toxicity
assessment as an example. Selected tests from a database containing toxicity
information of 12,000 compounds for 12 different toxicity tests were used.
The influence of parameters describing the representation of the compound
was checked. In addition, toxicity prediction models were created for selected
tests and a model predicting the outcome of several tests simultaneously
(multi-target). The results indicate that the obtained models have relatively
good accuracy and precision. Using multi-target models based on the BBN
algorithm can lead to better predictions than models for predicting a single
target variable
Development of test method for the characterization of electrically conductive yarns for integration in smart textiles
No full textThe Cluster of Excellence “CENTRE FOR TACTILE INTERNET WITH HUMAN-IN-THE-LOOP
(CeTI)” [1] deals with developments and inventions concerning smart devices used in many fields, e.g.
medicine and skill learning. For the integration or electrical interconnection of smart components,
electrically conductive materials are often integrated into the clothing. To maintain the flexible, textile
character of such smart textiles, polymer-based yarns with a metallized coating are mostly used for this
purpose. In order to be able to use these yarns both in everyday life situations and in personal protective
equipment with high safety requirements, it is necessary to specifically characterize and evaluate the
long-term stability of the materials used. Knowledge of the electrical properties under the influence of
temperature and moisture is particularly important for clothing worn close to the body, since the stress
on the materials due to body and skin temperatures and user perspiration is particularly high here. At
present, it is only partly possible to characterize the electrical stability of textile conductors under
different application-related climatic conditions using standardized test methods. For this reason, this
paper presents a newly developed measurement and test method that makes it possible to evaluate the
electrical properties of yarns under defined temperature and humidity influences over a specified period
of time. On the basis of different tests, the results of which are also discussed here, the measurement
accuracy and repeatability of the method can be proven
Financing Professional Sports in Poland by Local Governments
No full textProfessional sports (especially team sports, such as football, volleyball,
handball, basketball, speedway and ice hockey) in Poland are financed with
public funds. In particular, these funds are provided through communes,
districts, Marshal Offices, and companies of the State Treasury. Providing
financial support is done through granting subsidies (e.g. promoting the city
through sport), purchasing shares or being the owner of a sports joint-stock
company. This paper presents the legal basis for which municipal governments
support professional sports. By using the case study method based
on the example of sports clubs from various disciplines, the forms, methods
and volume of public involvement in professional sports in our country have
been shown. As a result of the conducted research, the model for financing
professional sports in Poland, which differs from those existing in Western
and Northern European countries, was emphasized because, in Poland,
the pillars are public funds (from municipal governments). Moreover,
the expansion and construction of sports infrastructure are carried out mainly
with the participation of public funds (central and local). The further development
of domestic sport and its professionalization will require greater market
orientation of individual clubs
The cationization of cotton/polyester blend
No full textCotton cellulose can be cationized with amines and quaternary ammonium compounds in alkaline
medium to change fiber surface charge. Such modified cotton adsorbs anionic dyes and auxiliaries due
to attractive forces between fiber and compound. Due to crystallinity of polyester fiber, its adsorption is
low. Polyester is usually modified by alkaline hydrolysis with cationic compounds as accelerators. For
all these reasons, in this paper, the cationization of cotton/polyester blended fabrics was performed. The change of fabric was studied through interface phenomena – zeta potential, moisture management and adsorption of anionic optical brightener. Zeta potential confirmed that the surface charge has been
changed. Cationization led to better adsorption of optical brightener and higher capillarity of fabrics
