103,639 research outputs found

    Biochar Derived from Cotton Fiber Feedstock: Characterization of Material and Potential for Adsorptive Capacity

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    Introduction Anthropogenic contaminants in surface waters have increased in complexity as the use of chemicals in all sectors of society has grown [1]. Water scarcity and quality issues will require robust, low-cost, and sustainable solutions. Biochars are particularly compelling as adsorptive solids because they repurpose wastes [2, 3] from other industries and are often carbon neutral, if not carbon negative. Cotton is the most common cellulosic fiber on the global fiber market, and as such, a significant contributor to municipal waste streams [4]. This research investigates the use of undyed, unbleached, 100% cotton muslin fabric as the fuel for making biochar to determine the feasibility of sourcing cotton fabric waste as biochar feedstock

    Flame retardant coating on cotton fabric with phosphorus containing polymeric film by admicellar polymerization

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    In this study, 2-methacryloyloxyethyl phosphorylcholine monomer has been polymerized using azobis-isobutyronitrileinitiator on the surface of cotton fabric by admicellar polymerization with the assistance of anionic surfactant(dodecylbenzenesulphonic acid sodium salt) along with NaCl as electrolyte. The polymeric film formed on cotton surfacehas been characterized by FTIR and SEM. FTIR spectrum shows additional bands at 1720 cm-1 (C=O str.), 1258 cm-1(P=O str.) and 1078 cm-1 (P ̶ O ̶ C str.) of phosphorus based polymer formed on cotton fabric. Thermal behaviour innitrogen atmosphere is also studied which shows that onset temperature of degradation of treated cotton fabric decreases by37 ºC and char yield increases by 21.7% at 600 ºC. The burning behaviour of treated cotton fabric is investigated by 45º autoflammability and limiting oxygen index tests. The pure cotton fabric burns the entire length of 15 cm sample in 11.8 s buttreated cotton fabric self-extinguishes in auto flammability test. The durability of treated cotton fabric has also been studiedup to two home launderings

    Moisture management characteristics of knitted casein fabric

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    In this research, thermal comfort and moisture management characteristics of knitted casein fabric have been evaluated and compared with cotton fabric for the application of undergarment. The fabric is analyzed for wicking, air permeability, thermal conductivity and water vapour permeability using physical test methods. The moisture management tester (MMT) was used to evaluate the parameters like wetting time, spreading rate, absorption speed, wetting radius, one way transport capacity and overall moisture management capacity (OMMC). It is observed that overall performance of casein fabrics is slightly better than that of cotton fabric. The thermal conductivity, air permeability and wicking values of the casein fabric are prominent as compared to the cotton fabric having same structural parameters, whereas the water vapour permeability values remain roughly same in both the fabrics. The MMT test results reveal that the casein fabric has an absorption rate of 66.2707 % on top side of the fabric and 70.6461 % on bottom side. For cotton fabric, the absorption rate is 50.046 % on the top and 43.6618 % at the bottom. The spreading rate of casein is found 5.0169 mm on the top and 5.0335 mm at the bottom surface, and for cotton it is 3.7921 mm on the top and 4.3019 mm at the bottom. The overall OMMC index of casein fabric is noted as 0.75, and for cotton it is found 0.7. The cotton fabric is found to be better than the casein fabric, based on the other parameters like maximum wetting radius and one way transport capacity values

    Flame-retardant Cotton Fabric Through Graft Copolymerisation

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    In an attempt to impart flame-retarding properties to the cotton fabric, post-graftingphosphorylation reactions on grafted cotton fabric were carried out. Photochemical graftcopolymerisation of 4-vinyl pyridine (4-VP) onto cotton fabric using benzophenone asphotosensitiser was carried out. Maximum percentage of grafting Pg, (18.50 %) was obtainedunder optimum  conditions; irradiation time 75 min, 0.5 ml of  benzophenone,  [4-VP]=748.71 x10-2 mole/l and 5 ml of water in the reaction mixture. Aliphatic alcohols of varying chain lengthdecreased percentage of grafting. The pendant pyridine rings of the 4-VP grafted cotton fabricwere converted to pyridinium chloride followed by the reaction with acrylamide to give 2-amido-ethylpyridiniumchloride. This was subjected to phosphorylation reaction with PCl3/petroleumether. The phosphorylated grafted cotton fabric burns only in the presence of flame with veryslow propagation of the flame (only 3.8 cm2) was found to burn of the total area of 147 cm2 with0.12 g of the ash content. Characterisation of gray cotton fabric and modified cotton fabric wascarried out by FTIR, thermogravimetric analysis, crease recovery, and moisture absorption studies

    Functionalization of textile cotton fabric with reduced graphene oxide/MnO2/polyaniline based electrode for supercapacitor

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    In this work, a new cotton electrode has been synthesized by coating ternary materials of reduced graphene oxide (rGO), manganese dioxide (MnO2), and polyaniline (PANi) on textile cotton fabric. First, Graphene oxide was deposited on cotton fibers by a simple 'dip and dry' method and chemically reduced into rGO/cotton fabric. MnO2 nanoparticles were accumulated on rGO/cotton fabric by in situ chemical deposition method. PANi layer was coated on rGO/MnO2/cotton fabric by in situ oxidative polymerization technique. A thin PANi coating layer acts as a protective layer on rGO/MnO2/cotton fabric to restrain MnO2 nanoparticles and rGO from dissolution in H2SO4 acidic electrolyte. The specific surface area of cotton electrode was measured using the Brenauer-Emmett-Teller (BET) method. The cyclic voltammetry (CV) results show that the cotton electrode has good capacitive behavior. The ternary cotton electrode exhibits high specific capacitance values of 888 F g(-1) and 252 F g(-1) at a discharge current density of 1 A g(-1) and 25 A g(-1) in 1MH(2)SO(4) electrolyte solution. The high areal specific capacitance of 444 Fcm(-2) was achieved for as-fabricated electrode. Also, the cotton electrode retains around 70% of specific capacitance after 3000 cycles at charge-discharge current density of 15 A g(-1). The slow decrease in specific capacitance is observed with increased discharge current density which proves its excellent rate capability. These results of rGO/MnO2/PANi/cotton fabric electrode show that this can be an excellent electrode for supercapacitor in energy storage devices

    A STUDY ON COMFORT PROPERTIES OF VETIVER EXTRACT TREATED AND UNTREATED FABRIC

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    In this endeavor, the comfort properties of plain woven cotton fabric and vetiver extract coated cotton fabric were analyzed and compared. The comfort properties such as thermal conductivity, thermal resistance, and water vapor permeability, air permeability, wicking and wetting properties were found for both fabrics. The results shown that both the fabrics have minor difference in values, that is the vetiver extract coated fabric has more comfort properties than the plain cotton fabric.&nbsp

    PROMOTION STRATEGY OF CLOTHING BRAND COTTON BUTTON

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    Cotton Button, is a children\u27s clothing brand in South Tangerang has been established since 2014, which was born from the idea of a mother of two children who have experience in choosing fabrics on children\u27s clothing. Cotton Button focuses on children\u27s comfort and naturalness offered from organic cotton fabrics. Organic cotton fabric is a cloth derived from natural cotton seeds that are not modified, also planted without using pesticides both in plants and in their planting fields. Cotton Button\u27s has been promoting, but based on the data obtained, the promotions carried out have not been able to increase audience awareness of Cotton Button products. This caused a decline in sales in the city of Bandung. In connection with this phenomenon, the design of the Cotton Button clothing brand was designed. Keywords strategy, promotion, bran

    Chemical Modification of Cotton Fabric Using Chitosan and Hydrolyzed Silk Fibroin

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    A cotton fabric modified with chitosan (CS) and hydrolyzed fibroin (HF) was prepared by using glyoxal as crosslinker. Fixation of CS and HF on cotton fabric was confirmed by Scanning electron microscopy (SEM) and Fourier transform infrared spectrometer (FTIR) and color depth (K/S) of finished fabrics which was dyed with acid dye. %Water absorption, tensile strength as well as %elongation and crease recovery angle were evaluated. Results of SEM micrograph and FTIR spectra clearly confirmed fixation of CS and HF on cotton fabric surface by using glyoxal as crosslinker. %Water absorption and %elongation of the finished fabrics increased with increased concentration of HF in finishing solution. However, decreases in tensile strength and % crease recovery were observed when increased concentration of HF was used. This work demonstrated that the surface properties of cotton fabrics was changed by HF modification, fixation of CS and HF placed onto cotton fabric changed the fabric surface properties, which facilitated more uptake of chemicals such as water and anionic acid dye. The cotton fabrics finished with hydrolyzed fibroin exhibited antibacterial activity against the growth of S.aureus and E.coli which facilitated the finished cotton fabric as  a functional materials, for example in a medical application
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