Magnetic cotton yarns – optimization of magnetic properties

Grosu, Marian C.; Lupu, I.; Cramariuc, Oana; Hristian, Liliana

doi:10.1080/00405000.2015.1061761

Cited by 9 publications

(5 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Promising candidates include protective polyester fabric with magnetic properties using a mixture of carbonyl iron and nano carbon black along with aluminium sputtering, which has been shown to have good microwave absorbing properties, particularly in the primary range of 8.2–12.4 GHz [ 28 ]. Good magnetic properties have been shown for staple yarns coated with barium ferrite, where the magnetizable phase leads to an increase in the saturation and residual induction [ 29 ]. When using cotton yarns that are covered with hard (barium hexaferrite), and soft (Black Toner 6745 CP-313) magnetic particles, it is shown that residual magnetism and coercive field intensity of the yarns are increasing with the magnetic powder content in the coating solution [ 30 ].…”

Section: Introductionmentioning

confidence: 99%

Hybrid Magnetorheological Composites for Electric and Magnetic Field Sensors and Transducers

2020

View full text Add to dashboard Cite

We present a simple, low-cost, and environmental-friendly method for the fabrication of hybrid magnetorheological composites (hMCs) based on cotton fibers soaked with a mixture of silicone oil (SO), carbonyl iron (CI) microparticles, and iron oxide microfibers (μF). The obtained hMCs, with various ratios (Φ) of SO and μF, are used as dielectric materials for manufacturing electrical devices. The equivalent electrical capacitance and resistance are investigated in the presence of an external magnetic field, with flux density B. Based on the recorded data, we obtain the variation of the relative dielectric constant (ϵr′), and electrical conductivity (σ), with Φ, and B. We show that, by increasing Φ, the distance between CI magnetic dipoles increases, and this leads to significant changes in the behaviour of ϵr′ and σ in a magnetic field. The results are explained by developing a theoretical model that is based on the dipolar approximation. They indicate that the obtained hMCs can be used in the fabrication of magneto-active fibers for fabrication of electric/magnetic field sensors and transducers.

show abstract

Section: Introductionmentioning

confidence: 99%

Hybrid Magnetorheological Composites for Electric and Magnetic Field Sensors and Transducers

2020

View full text Add to dashboard Cite

show abstract

“…This was 10 times higher than the properties of the magnetic textiles prepared by other methods. [18][19][20][21] However, each of the different magnetic textile substrates had a similar performance; that is, the surface magnetic induction intensity of the fabric increased approximately linearly with the increasing content of magnetic particles in the fabric. Figure 6(a) shows the hysteresis loops of coatings with different concentrations of magnetic powder on plain cotton textile fabric.…”

Section: Resultsmentioning

confidence: 99%

Magnetic properties of smart textile fabrics through a coating method with NdFeB flake-like microparticles

Zhou

Zhu

Zhang

et al. 2019

Journal of Engineered Fibers and Fabrics

View full text Add to dashboard Cite

Coatings were prepared by using NdFeB flake-like microparticles with aqueous polyurethane polyol dispersions and were coated onto the surface of textile fabrics in order to obtain textile fabrics with good magnetic properties. X-ray diffraction and energy dispersive spectroscopy analysis showed that there was no significant oxidation and magnetic decline in the samples after 6 months. The surface morphologies of the textiles were characterized using scanning electron microscopy and optical microscopy. The results showed that the crack density (the number of cracks per unit area) increased with increasing magnetic microparticle content, which can be attributed to two reasons: on one hand, the stress concentration at areas of high powder concentrations fractured more easily; on the other hand, the expansion coefficients of magnetic microparticles and polymer materials are different. Three kinds of textile fabrics with different microparticle concentrations were magnetized by means of a magnetizing machine. It was found that the cotton knitted fabrics had the highest average surface magnetic induction intensity, reaching 19 mT when the content of magnetic microparticle was 50 wt%. It was considered that this was related to the magnetic field distribution, due to the surface friction coefficient of the textile fabrics and the positions/angles of the flake-like microparticles. The hysteresis loops were measured using a vibrating sample magnetometer, and the results showed that the higher the concentration of magnetic microparticles, the higher the magnetization of the fabric. In short, this method can be used to prepare fabrics with high magnetization required under special conditions.

show abstract

“…A method for making a magnetic yarn (Figure 8) includes coating the yarn [25] with one or more layers of magnetic mixture of ferromagnetic or ferrimagnetic powder, binders, plasticizers, and the like (deformer, maintaining in suspension) [26,27].…”

Section: (A) Short Idea Historymentioning

confidence: 99%

The Long Way of the Success: From Idea to the Market

Ungureanu¹

2017

Textiles for Advanced Applications

View full text Add to dashboard Cite

Due to the changes in the textile field, effective solutions come from two directions: incorporating ideas in physical new and very modern products or giving value to new ideas that can impulse later discoveries and potential applications by identifying specific niches. New trends ask to cultivate a culture of entrepreneurship not only in terms of business but even at the level of research as the last chance for those who cannot produce traditionally in market conditions. The commercial or research (innovative) niches must be identified at the national and international levels and conducted to new advancements that should guide to commercial destination by responding to special human needs. The purpose of this chapter is to reveal five case studies as examples of integrating smart textiles into the value chain. This research shows that success is a consequence of intensiveand commercial-oriented company policy, an effect of updating to nowadays conditions, and an inspired movement to the right business way. The chapter also represents an invitation for creative people to focus on developing innovative value chains.

show abstract

Magnetic cotton yarns – optimization of magnetic properties

Cited by 9 publications

References 19 publications

Hybrid Magnetorheological Composites for Electric and Magnetic Field Sensors and Transducers

Hybrid Magnetorheological Composites for Electric and Magnetic Field Sensors and Transducers

Magnetic properties of smart textile fabrics through a coating method with NdFeB flake-like microparticles

The Long Way of the Success: From Idea to the Market

Contact Info

Product

Resources

About