A. Shams Nateri, Sheida Zandi, Vahid Motaghitalab and Negin Piri
This paper aims to investigate the effect of titanium dioxide (TiO2) nanoparticle coating on the visible reflectance and color appearance of dyed cotton fabrics.
Abstract
Purpose
This paper aims to investigate the effect of titanium dioxide (TiO2) nanoparticle coating on the visible reflectance and color appearance of dyed cotton fabrics.
Design/methodology/approach
A Taguchi experimental design model was used to minimize the number of samples and for accurate prediction of possible responses. The governing parameters affecting the color change of dyed fabrics through the coating process were selected as shade of cotton fabrics, depth of shade, concentration and size of TiO2 nanoparticles and concentration of citric acid. The Taguchi model suggests the L18 orthogonal array. In the meantime, the lower response category was selected to determine the optimum conditions. According to obtained results, coating with TiO2 nanoparticles results in color change (ΔEab*) of all dyed cotton fabrics.
Findings
The obtained results indicate that the TiO2-coated fabrics had higher reflectance compared to raw fabrics. Furthermore, it was found that the TiO2 pigmented coating increases the brightness of samples and simultaneously decreases their chroma. On the other hand, analysis of variance reveals that the concentration of TiO2 nanoparticles together with shade of fabrics has the most significant impact on the color change of dyed fabrics through coating process. Dye concentration and size of TiO2 particles also, to the same extent, had influence over the color change. However, the effect of the concentration of citric acid on the color change was insignificant.
Originality/value
This research investigates the effect of TiO2 nanoparticles on the optical property of colored fabric by using a Taguchi experimental design model to minimize the number of samples.
Details
Keywords
Zahra Abadi, Vahid Mottaghitalab, Mansour Bidoki and Ali Benvidi
The purpose of this paper is to present a sophisticated methodology for inkjet printing of silver nanoparticles (AgNPs) in the range of 80-200 nm on different flexible substrate…
Abstract
Purpose
The purpose of this paper is to present a sophisticated methodology for inkjet printing of silver nanoparticles (AgNPs) in the range of 80-200 nm on different flexible substrate. AgNPs was chemically deposited by ejection of silver nitrate and ascorbic acid solutions onto different substrates such as paper and textile fabrics. The fabricated pattern was used to employ as electrode for electrochemical sensors.
Design/methodology/approach
The morphology of deposited AgNPs was characterized by means of scanning electron microscopy. Moreover, conductivity and electrochemical behavior were identified, respectively, using four probe and cyclic voltammetry techniques. Acquired image shows a well-defined shape and size for the deposited AgNP.
Findings
The conductivity of the paper substrate after printing process reached 5.54 × 105 S/m. This printed electrode shows a sharp electrochemical response for early determination of glucose. The proposed electrode provides a new alternative to develop electrochemical sensors using AgNPs chemically deposited on paper and textile fabric surfaces.
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Keywords
Fatemeh Haghdoost, Vahid Mottaghitalab and Akbar Khodaparast Haghi
The purpose of the current study is to explore the potential possibility of acceleration in recognition, remedial process of heart disease and continuous electrocardiogram (ECG…
Abstract
Purpose
The purpose of the current study is to explore the potential possibility of acceleration in recognition, remedial process of heart disease and continuous electrocardiogram (ECG) signal acquisition. The textile-based ECG electrode is prepared by inkjet printing of activator followed by electroless plating of nickel (Ni) particle.
Design/methodology/approach
The electrical resistance shows a range of around 0.1 Ω/sq, which sounds quite proper for ECG signal acquisition, as the potential difference according to heart activity on skin surface is in milivolt range. Surface modifications of Ni–phosphorus (P)-plated polyester fiber were studied by scanning electron microscopy, energy dispersive X-ray spectroscopy and X-ray diffractionmethods. The quality of the acquired signal from printed square-shaped sensors in two sizes with areas of 9 and 16 cm2 compared with the standard Ag/Agcl electrode using commercial ECG with the patient in the sitting position.
Findings
Comparison of these data led to the consideration of small fabric sensor for better performance and the least disturbance regarding homogeneity and attenuation in electric field scattering. Using these types of sensors in textile surface because of flexibility will provide more freedom of action to the user. Wearable ECG can be applied to solve the problems of the aging population, increasing demand for health services and lack of medical expert.
Originality/value
In the present research, a convenient, inexpensive and reproducible method for the patterning of Ni features on commercial polyester fabric was investigated. Printed designs with high electrical conductivity can be used as a cardiac receiving signals’ sensor.