Endogenous pH-responsive induced reversible switching of multifunctional properties of antibacterial cotton fabrics

In this study, the effect of corona discharge treatment on the physical and mechanical properties of bleached cotton and polyester-cotton fabrics were investigated. For this purpose, the samples were treated by corona discharge at two levels of voltage 5 and 10 kV, and at various duration times of plasma, ca. 1.4, 2.1 and 3.5 min. The corona discharge treatment was applied on the fabric samples before and after bleaching treatment. The results show that the corona influences on the surface morphology, breaking strength, air permeability, abrasion resistance, and pilling of cotton and polyester-cotton fabrics. Moreover, the levels of voltage and duration of plasma have a different effect on the properties of fabrics.

A review on influential behaviour of biopolishing on dyeability and certain physico-mechanical properties of cotton fabrics

Bleached cotton muslin fabric with or without pre-oxidized with NaIO4 (oxy-cotton) was chemically modified with glycine (amino acid) by pad dry calendar process to investigate the changes in textile properties and its dyeability with reactive dye. This glycine modified cotton incorporates new functional groups producing –NH3+ or –C=NH+ -ion (cationic groups) in acid bath to obtain cationized cotton making it amenable to a newer route of salt free reactive dyeing in acid bath. In the present work the process variables of reactive dyeing in the salt free acid bath for dyeing of amine (glycine) modified cationized cotton were studied and optimized. The present study also includes thorough investigation of changes in important textile related properties and dyeability with reactive dye after such chemical modifications. Between oxidized and unoxidized cotton muslin fabric, unoxidized cotton fabric shows better reactive dye uptake in both conventional alkaline bath dyeing and nonconventional salt free acid bath dyeing particularly for high exhaustion class of reactive dye with acceptable level of colour fastness and overall balance of other textile related properties. Moreover, application of dye fixing agent further improves surface colour depth (K/S) of the glycine treated cotton fabric for HE brand of reactive dyes. Corresponding reaction mechanisms for such modifications were supported by FTIR spectroscopy. Finally unoxidized cotton and pre-oxidized cotton further treated with glycine (amino acid) provide a new route of acid bath salt free reactive dyeing showing much higher dye uptake and higher degree of surface cover with amino acid residue anchored to modified cotton.

In order to obtain a durable anti-ultraviolet and antibacterial cotton fabric, silk fibroin, honeysuckle extract (chlorogenic acid) and citric acid were used to prepare a compound environment-friendly finishing agent, and then the cotton fabric was modified in this paper. Micro-morphology and properties were compared between cotton fabrics finished with a composite solution of silk fibroin/chlorogenic acid/citric acid and those finished first with silk fibroin then chlorogenic acid. Results showed that amidation and esterification crosslinking reactions occurred between the compounds and cotton fibers. Cotton fabric treated with the composite solution had higher UPF value (>90 after 30 launderings) and antibacterial rates (>95% for Staphylococcus aureus and Escherichia coli). There existed strong covalent bonds and good synergistic effects among silk fibroin, citric acid and chlorogenic acid, which could endow the cotton fabric with more durable anti-ultraviolet and antibacterial properties.

The properties of PLA spun yarn was investigated comparing with cotton and PET spun yarns of the same linear density. The PLA/cotton blended fabric (50/50) was prepared and the fabric properties were analyzed in comparison with the 100% PLA and cotton fabrics. It was found that in the PLA/cotton blended fabric, cotton was the component that imparted moisture absorption, strength and drapeability to the fabric, while, PLA provided dimensional stability to the blend. Investigation of the effect of the pretreatment and dyeing processes found that the bleaching process for cotton with H2O2 under alkaline conditions caused a significant strength loss to the PLA fabric. The dyeing processes exhibited a slightly negative effect on the fabric strength. Meanwhile, the strength of cotton fabric was much less affected by the pretreatment and dyeing processes used. The fabric hand properties, viz. stiffness and drapeability of PLA and cotton fabrics were also influenced by the pretreatment and dyeing processes.

Nowadays, consumers understand that upgrading their traditional clothing can improve their lives. In a garment fabric, comfort and functional properties are the most important features that a wearer looks for. A variety of textile technologies are being developed to meet the needs of customers. In recent years, nanotechnology has become one of the most important areas of research. Nanotechnology’s unique and useful characteristics have led to its rapid expansion in the textile industry. In the production of high-performance textiles, various finishing, coating, and manufacturing techniques are used to produce fibers or fabrics with nano sized (10−9) particles. Humans have been utilizing cotton for thousands of years, and it accounts for around 34% of all fiber production worldwide. The clothing industry, home textile industry, and healthcare industry all use it extensively. Nanotechnology can enhance cotton fabrics’ properties, including antibacterial activity, self-cleaning, UV protection, etc. Research in the field of the functionalization of nanotechnology and their integration into cotton fabrics is presented in the present study.

This study explores the chemical fixation method for imparting special properties to fabrics used in special clothing for oil and gas industry workers in Uzbekistan. The primary objective is to evaluate the water, oil, and fire resistance properties of these fabrics and propose methods for enhancing them. Experimental results show the adsorption and desorption of oil products, as well as the hydrophobic and flame-retardant properties of the fabrics. The treatment with a collagen-based flame-retardant composition was found to be effective in improving the flammability and flame charring performance of cotton and viscose fiber fabrics. Additionally, halogen-free flame retardants were identified as having low toxicity and low smoke generation during combustion. The study also examines the impact of oil soaking and drying regimes on the physical and mechanical properties of the samples.

Durable multifunctional cotton fabric with superior biocidal efficacy and flame retardancy based on an ammonium phosphate N-halamine

The effects of some yarn properties (i.e. type, count, twist level, ply number, unevenness and crimp) and fabric constructional properties (i.e. cover, thickness and balance) on surface roughness values of cotton woven fabrics were investigated. A general overview of the results showed that surface roughness values of fabrics were affected from yarn and fabric properties and the effects were related to fabric balance, fabric cover (not cover factor), fabric thickness and crimp values of yarns in fabric structures. Surface roughness values of fabrics decreased as yarn fineness and yarn twist levels increased but as yarn ply number decreased. Also, surface roughness values gradually decreased from open-end yarn constituting fabrics to combed yarn constituting fabrics. Results showed that different properties of yarns caused changes in yarn crimps in fabric structure and also governed the changes in fabric balance, as well as changes in roughness of fabric surfaces. The changing properties of yarns and impact of these properties on fabric construction affected the formation of cotton fabric surfaces from smooth to coarse.

Cotton and cotton-polyester blend fabrics were finished by a dimethyloldihydroxyethyleneurea (DMDHEU)-glycolic acid-postactivation process to give fully-cured durable-press fabrics which could be given sharp, permanent creases by an ironing process. The resilience and strength-retention properties of these fabrics were equivalent to, or slightly better, than those of corresponding cotton or blend fabrics which had been finished by conventional durable-press processes. The postactivated blend fabrics accepted better creases at low temperatures than the corresponding cotton fabrics, but at the moderately higher temperatures required to form acceptable permanent creases, the creasabilities of the cotton and blend fabrics were almost equivalent. Unmodified blend fabrics and conventionally finished durable-press blend fabrics, either postactivated or not activated, accepted better permanent creases than the corresponding cotton fabrics, but none of these creases were acceptable.

Content system and characteristics of fabric property is investigated in this paper. The connotation of fabric property is of diversity and colorful. Fabric property has its logical level, which can be primarily classified into basic physical and chemical properties (BPCP) and application derivative properties (ADP). According to experiences and practice that people applied fabric, several common integrated concepts (handle, luster, comfort and function) are set up. Fabric properties manifest in durability, aesthetics, permeability, fabric handle. Fabric property is a generic term of various characteristics and abilities of fabric, which is a kind of external reflections of internal structures of fabric. No matter what fabric it is, it possesses every property in content system. Fabric property depends on material and structure of fabric, and fabric of wool or cotton with plain or satin have differences on individual property. Content system of fabric property has the different measurement requirements to different application fields. The requirement to fabric property on different aspects of the same application is different on level.

Sericulture in India provides employment to rural youth and women engaged in its various activities. During raw silk processing, a compound known as sericin is released into the environment which causes water pollution if not recovered from discharged water. A study was carried out to utilize the waste product i.e. sericin for the treatment of cotton fabric and see its effect on the properties of fabric. Treatment was given using cross linking agent and catalyst, fabric was later dyed with natural dye manjistha. The treated fabric was tested for crease recovery, wettability, air permeability and UV protection properties. The results revealed that application of silk protein enhances properties of cotton fabric.

The microwave dielectric properties of cotton fabrics in the fabric thickness direction are investigated in relation to the fabric construction, thread count and solid volume fraction (SVF) under the five different relative humidity (RH) conditions. The dielectric constants of the fabric samples exhibits increasing trends with RH, and this is primarily due to more abundant free water in the samples. For most of woven and knitted samples, an increase in thread count results in a higher dielectric constant and this is associated with the increase in SVF. By comparing the woven and knitted samples of the same SVFs, it is found that the woven fabrics tend to have higher dielectric constants than the knitted samples at near 2.45 GHz. This observation of the dielectric properties of cotton fabrics clearly indicates that although the SVF is primarily responsible for the resulting dielectric properties of fabrics, other structural parameters must also be considered in dielectric analysis. Based on in-situ analysis of yarn orientations in the given samples, we claim that the yarn orientation plays an important role in the microwave dielectric properties of cotton fabrics.

Enhancing the multifunctional properties of cellulose fabrics through in situ hydrothermal deposition of TiO2 nanoparticles at low temperature for antibacterial self-cleaning under UV–Vis illumination

In this study, cotton fiber fabrics were coated with polyacrylate-based polymer paste containing huntite–hydromagnesite by knife over roll process. The flame retardancy properties of the cotton fabrics were tested according to vertical flame test, limit oxygen index (LOI) test, smoldering cigarette and match flame tests. Thermal behavior of cotton fabrics was investigated by DTA–TG analysis. The antibacterial activities of coated cotton fabrics were qualitatively determined according to AATCC Method 147. Mechanical properties of cotton fabrics were evaluated with the help of tear strength, abrasion strength, thickness and stiffness measurements. Air permeability, UV protection and color properties were also investigated. Free formaldehyde content of the coatings on cotton fabrics were determined according to Japanese Law 112. The microstructural properties of cotton fabrics were characterized using SEM and FTIR (ATR) analysis. Furthermore, the mineral content and mean particle size value of huntite–hydromagnesite were also determined with X-ray fluorescence spectrometer and particle size analyzer. The flame retardancy and antibacterial properties of the cotton fabrics were improved after coating with acrylate-based polymer paste containing huntite–hydromagnesite. Mechanical properties such as tear strength of the cotton fabric decreased after coating process however huntite–hydromagnesite addition into coating paste did not lead to further increase on the tear strength loss of cotton fabric. Despite this, the resultant maximum abrasion cycles significantly increased following coating process application. Furthermore, colorimetric properties such as whiteness and lightness of cotton fabric did not significantly change after applied coating processes. SEM and FTIR analyses confirmed the constancy of microstructure of cotton fibers after coating process.