Hafeezullah Memon

STUDY OF WRINKLE RESISTANT, BREATHABLE, ANTI-UV NANOCOATED WOVEN POLYESTER FABRIC

The multifunctional textiles are interesting areas to be researched on. In this paper, the effect of the fiber nanocoating on the wrinkle recovery, air permeability and anti-Ultraviolet (UV) property of different woven fabrics using sol–gel method has been studied. The sol–gel method has various advantages over other methods. Along with these properties, no change in visual appearance has also been discussed in this paper. The dispersion of nanoparticles of titanium was obtained into silica sol. The characterization of nanocoating was done using Field emission scanning electron micrograph (FESEM) and Fourier transform infrared spectroscopy (FTIR) studies. The fabric wrinkle recovery properties, air permeability and anti-UV performance were analyzed using three different immersion timings into the nanosol. The results revealed that both wrinkle recovery properties and anti-UV performance have increased with respect to immersing time of the nanocoating although a slight decrease in air permeability and whiteness index of the fabric was also observed.

STUDY OF MULTIFUNCTIONAL NANOCOATED COLD PLASMA TREATED POLYESTER COTTON BLENDED CURTAINS

Over the past decade, considerable progress has been made in the applications of TiO2nanoparticles to get the multifunctional textiles. This paper presents the consequences of pretreatment of polyester fabric using cold plasma in the presence of oxygen — which might be beneficial for bonding nanoparticles over the polyester cotton blended curtains. Moreover, this paper presents the primary technique for suspending titanium dioxide (TiO2) nanoparticles into nanosilica sol for nanocoating of polyester cotton blended curtains. In addition, the detailed characterization of nanocoating has been made using Field emission scanning electron microscopy (FESEM), Fourier transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD); and the consequences of nanocoating with and without plasma treatment for enhancing the different properties i.e. antistatic, anti UV and antibacterial property are discussed. Furthermore, the consequences of nanocoating with and without plasma treatment on the mechanical properties have also been discussed.

Dyeing Recipe Optimization for Eco-Friendly Dyeing and Mechanical Property Analysis of Eco-Friendly Dyed Cotton Fabric: Better Fixation, Strength, and Color Yield by Biodegradable Salts

ABSTRACT This research paper primarily deals with the comparative analysis on the mechanical properties of cotton fabric dyed with fiber reactive dyes using three different salts. The three salts used for this research are Sodium Chloride, tri sodium Nitrilo triacetic Acid (NTA) and tetra sodium Ethylene Diamine Tetra Acetic acid (EDTA). NTA and EDTA are biodegradable salts, whereas NaCl is conventional non-biodegradable salt. Along with the improvement in the mechanical properties and less effluent hazards using Biodegradable salts, quite comparable color yields and Color fastnesses were achieved by using biodegradable salts.

Reducing the Effluent Pollution by Using Trisodium Nitrilotriacetate in Batch Process of Dyeing Cotton Fabric with Fiber-Reactive Dyes

A biodegradable organic alkaline salt (trisodium nitrilotriacetate) was used in the batch process of dyeing cotton fabrics with fiber-reactive dyes replacing the conventionally used inorganic salt, sodium chloride, and inorganic alkali, sodium carbonate. The comparative dyeing results were evaluated for color yield, colorfastness, and total dissolved substances (TDS) content of the effluent. Variables affecting dyeing results such as salt/alkali concentration, dye fixation temperature and time were studied. The color yield and colorfastness of the dyed fabrics using trisodium nitrilotriacetate were very similar to those obtained using inorganic salt and inorganic alkali. The reduction in TDS content of the dyeing effluent, when using trisodium nitrilotriacetate, finally supported the aim of the work.

Optimization of Mechanical and Thermal Properties of iPP and LMPP Blend Fibres by Surface Response Methodology

Optimization of the mechanical and thermal properties of isotactic polypropylene (iPP) homopolymer blended with relatively new low molecular low modulus polypropylene (LMPP) at different blend ratios was carried out via surface response methodology (RSM). Regression equations for the prediction of optimal conditions were achieved considering eight individual parameters: naming, elongation at break, tensile strength and elastic modulus, crystallization temperature (TC), first melting temperatures (TM1), heat fusion (Hf), crystallinity, and melt flow rate (MFR), which were measured as responses for the design of experiment (DOE). The adjusted and predicted correlation coefficient (R2) shows good agreement between the actual and the predicted values. To confirm the optimal values from the response model, supplementary experiments as a performance evaluation were conducted, posing better operational conditions. It has been confirmed that the RSM model was adequate to reflect the predicted optimization. The results suggest that the addition of LMPP into iPP could effectively enhance the functionality and processability of blend fibres if correctly proportioned.

Effects of Styrene-Acrylic Sizing on the Mechanical Properties of Carbon Fiber Thermoplastic Towpregs and Their Composites

Thermoplastic towpregs are convenient and scalable raw materials for the fabrication of continuous fiber-reinforced thermoplastic matrix composites. In this paper, the potential to employ epoxy and styrene-acrylic sizing agents was evaluated for the making of carbon fiber thermoplastic towpregs via a powder-coating method. The protective effects and thermal stability of these sizing agents were investigated by single fiber tensile test and differential scanning calorimetry (DSC) measurement. The results indicate that the epoxy sizing agent provides better protection to carbon fibers, but it cannot be used for thermoplastic towpreg processing due to its poor chemical stability at high temperature. The bending rigidity of the tows and towpregs with two styrene-acrylic sizing agents was measured by cantilever and Kawabata methods. The styrene-acrylic sized towpregs show low torque values, and are suitable for further processing, such as weaving, preforming, and winding. Finally, composite panels were fabricated directly from the towpregs by hot compression molding. Both of the composite panels show superior flexural strength (>400 MPa), flexural modulus (>63 GPa), and interlaminar shear strength (>27 MPa), indicating the applicability of these two styrene-acrylic sizing agents for carbon fiber thermoplastic towpregs.

Indoor Decontamination Textiles by Photocatalytic Oxidation: A Review

A large number of researches have been made to make the textile intelligent and smarter; this is achieved by imparting functionality to the textile materials. The indoor environment possesses a variety of pollutants which do not come from the outer environment, but they come from the inner environment itself. Today, the smarter fabrics that may clean the indoor air have been studied by various researchers. The smarter fabrics contain the nanocoating of semiconductor oxides, mostly TiO2; thus the synthesis and application of these nanoparticles on the textile material have been reviewed in this paper. Moreover, there are lots of environmental and health issues regarding nanoparticles that have also been discussed in brief.