JOURNAL OF APPAREL AND TEXTILE SCIENCE AND TECHNOLOGY
Year:2024 | Volume:13 | Issue:2|Papers Count:6

Commercial thermochromic colorants, responsive to temperature changes by reversibly transitioning from colorless to colored states, had found widespread applications in various fields, including medical thermography, plastic strip thermometers, photochromic lenses, food packaging, and non-destructive testing in diverse research areas. Recent research indicates a significant increase in the use of thermochromic materials in textile printing, providing numerous capabilities for innovative commercial products. Thermochromic colorants are mostly available in the form of pigments. This study aims to investigate the color fastness of thermochromic prints on cotton fabric in the presence of three natural thickeners. The obtained data demonstrates that the printed samples exhibit good rubbing fastness. Furthermore, the wash fastness and stain resistance of the printed fabrics were measured with satisfactory results based on the gray scale. light stability was measured with a blue scale. Regarding light stability, the results indicate that commercial thermochromic colorants exhibit relatively poor light fastness to UV light exposure.

One of the key issues in marketing is the analyzing and studying consumer behavior. Presently, the fashion and clothing industry has a great capacity In this regard, via principled planning and investing in it, developing countries can attain numerous benefits and accomplishments. Regarding the textile and clothing production extended history, merely a restricted number of brands from the fashion and clothing industry in Iran have become strong and distinguished brands in the domestic or international markets. Regrettably, most of the high-quality domestic brands have lost their equitable status to low-quality foreign and fake brands. When choosing a clothing brand, the present research aims to recognize the cultural factors affecting the consumer's awareness of quality. In terms of method, the present research is a correlational analysis, and in terms of purpose,it is applied. The statistical population comprises all clothing buyers in 2022-2023 in Sari City, and simple random sampling was also done in this city. The sample size was achieved by Cochran's formula for boundless populations with a volume of 395 people. Bathaei’s (2014) 32-item questionnaire was used to collect data. The statistical analysis of the data revealed that some cultural dimensions such as individualism and uncertainty avoidance have a meaningful effect on the clothing brand quality awareness behavior. In the country's fashion and clothing industry, the results of the present research can be a very valuable solution for brands.

In this study, chitosan-based nanofibrous scaffold containing hydroxyapatite/metal-organic framework (HAp@MOF) nanocomposite was prepared for potential application in tissue engineering. First, HAp@MOF nanocomposite was produced and characterized by in-situ synthesis of metal-organic framework, and then chitosan nanofibrous scaffold was produced using electrospinning method. Morphology, crystal structure, hydrophilic behavior and antibacterial activity of CS/PVA-HAp@MOF composite nanofibrous scaffold were studied and evaluated. For this purpose, scanning electron microscope, Fourier transform infrared spectroscopy, X-ray diffraction, water contact angle and disk diffusion test were used. The investigation of the morphology of the composite nanofibrous scaffold showed the production of uniform and bead-free nanofibers with an average diameter of 113 nm. Also, the addition of HAp@MOF nanocomposite has increased the diameter of the fabricated fibers and increased the hydrophilic property with a contact angle of 57 degrees. Moreover, the investigations of antibacterial activity of nanofibrous scaffolds have indicated the appropriate performance of the nanofibrous scaffold containing HAp@MOF nanocomposite against the gram-positive bacteria Staphylococcus aureus and the gram-negative bacteria Escherichia coli. The obtained results showed that CS/PVA-HAp@MOF composite nanofibrous scaffold can be used as a good candidate for potential tissue engineering applications.

Current paper has been focused on development of perovskite textile solar cells with mechanical flexibility, low-temperature manufacturing, and cost-effectiveness. Polyethylene terephthalate (PET) has become the substrate of choice compared to other transparent plastic substrates like polyethylene naphthalate (PEN) because it is not only chemically stable but also much cheaper, as an important factor for the photovoltaics (PV) technology development. Herein, spiro-OMeTAD was substituted with CZTS nanoparticles for the first time as an inorganic hole transporting material in flexible perovskite solar cells based on SnO2 electron transport layer. Trough Optimization of CZTS concentration in IPA, the maximum PCE of 2. 4% with open-circuit voltage (VOC) of 0. 87 V, short current (JSC) of 9. 1 mA/cm2 and fill factor (FF) of 30. 1% was achieved at a concentration of 15 mg/mL and particle size of 10 nm. The enhanced PV performance of these cells is related to more efficient hole-extraction and reduced carrier recombination, leading to less transport resistance of hole transport layer compared to other concentrations. Subsequently, the flexible cells were successfully embedded on a textile substrate, indicating cells can be seamlessly integrated with portable and wearable smart electronics.

Twist fixation is an important part of yarn production in two methods of virtual or real twisting method. Currently, twist fixation is calculated by performing heat treatment based on a combination of stabilization of bending, strain, and torque according to common methods. This is the fact that the basis of yarn twist is simply the application of twisting force on the fibres, and as a rule, twist stabilization should be the same twisting force. In the new method, a way to evaluate the degree of stabilization of the twist, which is only caused by the torsional force applied to the fibres, is presented. With the help of Taguchi method, 25 samples were prepared under different levels of twist, temperature and time. The design is done for three factors (time, temperature, twist) and five levels for each factor. The twist, temperature and time levels are respectively (0, 40, 80, 120, 180), (23, 60, 90, 120, 150) and (0, 60, 90, 120, 150). Then heat treatment was done and the degree of twist stabilization was calculated according to the new method and predicted by regression and neural network. The results show a good correlation between the experimental and predicted results by the ANN model compared to the regression method.

The use of co-polyesters with a low melting point in the textile industry has received much attention in order to use the ability of strength by melting in different forms, including fibers, yarns, fabrics and non-wovens. One of the important indicators of molecular weight and flowability of fibrous polymers before their processing is to evaluate the melt flow index. With this simple method, the flow behavior of fibrous polymers can be investigated at low cost and in a short period of time before the melt-spinning process. In this research, the value of melt flow index of four different grades of copolyester with a temperature of 198 °C was determined. Therefore, checking the flow behavior by using the melt flow index measuring device, temperature changes, residence time and load weights are used. The results showed that intrinsic viscosity is one of the influencing factors on the value of melt flow index and flow stability in different test conditions, and changes in temperature and residence time have the greatest effect on the change of melt flow index. As the temperature and residence time increase, the viscosity decreases. Also, by carefully examining their melt flow behavior, it was observed that among the four different grades of copolyester examined, the grade with intrinsic viscosity of 0. 66 and 0. 69 dl/g is the most suitable option for the melt spinning process.