Microfibre

Purpose – The purpose of this paper is to investigate plasma treatment for Tencel microfibre fabrics for
possible improvement in various functional properties.
Design/methodology/approach – The plasma treated and untreated fabrics were dyed using reactive
dyes and evaluated for comfort properties such as wicking, water vapour permeability and air permeability.
Findings – The various comfort properties of plasma treated and an untreated Tencel microfibre fabric have
been studied. The wicking results showed a significant reduction in wicking time for plasma treated fabrics
compared to untreated fabrics. The test results for water vapour permeability show no significant difference
between plasma treated and untreated fabrics. The plasma treated samples show higher air permeability
than untreated samples. In the wetting test, it is clearly seen that the plasma treated samples absorbed the
water at a faster rate.
Originality/value – This research investigates plasma treatment for Tencel microfibre fabrics for possible
improvement in various functional properties.

The novel polyorganosiloxane material S-101 modified with amino and hydroxy groups is synthesized. Shade darkening effect of modified polyorganosiloxane on dyed polyester microfiber fabric is investigated by reflectance spectrum, color yield (K/S), and the color differences (ΔE). The colorimetric data of CIELAB is discussed. The results show that the novel material of silicone polymer modified with amino and hydroxy groups has excellent shade darkening effect on dyed polyester microfiber fabric. The rates of the color yield increase (I%) of all dyed fabric with four dyes (Disperse Yellow S-4RL, Red GS, Blue 2BLN, and Black SF-R) exceed 10%. The shapes of the reflectance spectra curves of the dyed fabrics before and after treated with S-101 are not noticeable change. The dyed fabrics with the polymer have not significant effect on the wash fastness and wet rubbing fastness. The low reflectance thin film on dyed fabrics is formed. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci 2007

Ultra-fine cellulose acetate (CA; Mw≈30,000Da; degree of acetyl substitution≈2.4) fiber mats containing asiaticoside (AC) from the plant Centella asiatica L. either in the form of pure substance (PAC) or a crude extract (CACE) were fabricated by electrospinning. Incorporation of either PAC or CACE (40wt.% based on the weight of CA) in the neat CA solution (17% w/v in 2:1 v/v

Carbon microfibers were grown from ethylene using laser assisted chemical vapor deposition. The laser power was varied. The internal structure of the carbon fibers was characterized by Raman spectroscopy at 514.5 nm using an Ar+ laser. Fibers were cast in epoxy resin and polished in order to allow a radial analysis of the cross-section. Each spectrum has been analyzed by

An internal mixer was used to prepare polycarbonate (PC)-based nanocomposites containing carbon fibers, carbon nanofibers (CNF), and mixtures of the two fillers. The influence of the filler volume fraction, the relative amounts of the two fillers, and the filler orientation relative to the direction of heat flow on the thermal conductivity was examined. Filler orientation was obtained by the extrusion of strands of the nanocomposite. The thermal conductivity was measured using a steady-state heat conduction technique. The CNF were fragile, and their aspect ratio could be decreased during processing. In general, the composite thermal conductivity increased with increasing filler content. Fiber alignment in the heat flux direction resulted in a significant increase in thermal conductivity. Mixing of nanofibers with microfibers resulted contacts between the microfibers. This, together with fiber alignment provided large increases in the thermal conductivity. POLYM. ENG. SCI., 2008. © 2008 Society of Plastics Engineers

Carbon microfibers were grown from ethylene using laser assisted chemical vapor deposition. The laser power was varied. The internal structure of the carbon fibers was characterized by Raman spectroscopy at 514.5 nm using an Ar+ laser. Fibers were cast in epoxy resin and polished in order to allow a radial analysis of the cross-section. Each spectrum has been analyzed by

Electrospinning can be applied using either a polymer solution, or in some instances as a melt.2, 4 Whatever the polymer employed, there are many factors and variables that can affect the type and quantity of fiber that is produced. These variables can be identified in three ...

Conductive polymer composites are usually prepared by incorporating conductive fillers into polymer matrix through melt mixing either by using an extruder or an internal mixer. However, to obtain high electrical conductivity with this method, high loadings of the ...

A simple and efficient method for the synthesis of polyaspartamide-based brush copolymers using Atom Transfer Radical Polymerization (ATRP) is here presented. The syntheses were performed by using two subsequent steps. In the first step the macroinitiator was obtained ...

Isotactic polypropylene (iPP) has successfully been electrospun from both solution and melt using an elevated temperature setup. First, PP nanofibers with two different average diameters (0.8 μm and 9.6 μm) were obtained via electrospinning of iPP in decalin, and the effect of deformation and solidification on the morphological and structural features of the resulting fibers was studied. Secondly, melt electrospun PP fibers with two different average diameters were also fabricated to compare the structures with those of solution electrospun PP fibers. DSC and XRD results show that β form crystals which can increase the impact strength and toughness of electrospun fibers are present in sub-micron scale PP fibers from solution, while fibers from melt mostly show α form crystals. The annealed fibers have changed their morphological forms into α and γ crystal forms. Finally, it is observed that electrospun PP fiber webs both from solution and melt exhibit superhydrophobicity with a water contact angle about 151° which is substantially higher than those of a commercial PP non-woven web and a compression molded PP film, 104° and 112°, respectively. Such superior hydrophobicity was observed for all PP electrospun fibers and it was not altered by the processing scheme (solution or melt) or fiber diameter (sub-micron or micron). Enhanced hydrophobicity of electrospun PP fiber webs contribute to excellent barrier performance without losing permeability when they are applied to protective clothing.