Environmentally Friendly Multifunctional Treatments of Textiles with Photo-Active Colorants

2012 ◽  
Vol 441 ◽  
pp. 780-780
Author(s):  
Ning Liu ◽  
Gang Sun
Keyword(s):  
Thermal Properties ◽  
Light Exposure ◽  
Environmentally Friendly ◽  
Cotton Fabrics ◽  
Fluorescent Light ◽  
Oxidation Reactions ◽  
Acid Dyes ◽  
Chemical Structures ◽  
Wool Fibers ◽  
Dyed Fabrics

As an effort to develop environmentally friendly light-induced functional treatments for fabrics, certain acid dyes were incorporated onto different fabrics. The treated fabrics demonstrated powerful and durable antimicrobial and oxidative detoxifying functions after light exposure. In this presentation, we will report the latest progresses in using certain anthraquinone compounds in treatments of wool, nylon, silk and cotton fabrics. The dyed fabrics could demonstrate antimicrobial functions upon exposed to UVA (365 nm) and fluorescent light. However, it was more interesting to observe that the surfaces of the dyed wool fibers became polished with scales removed after being exposed to UV or day light for certain time. The chemical structures and thermal properties of the dyed fabrics were investigated by using different instrumentation such as SEM, FTIR, and other instruments, and the results verified the proposed oxidation reactions of the fibers. This research proves that dyeing fabrics with photo-active dyes could be a new green functional treatment on textiles.

scholarly journals Preparation of Chitosan Nanoparticles and its Utilization as Novel Powerful Enhancer for Both Dyeing Properties and Antimicrobial Activity of Cotton Fabrics

2021 ◽  
Vol 11 (5) ◽  
pp. 13652-13666
Keyword(s):  
Antimicrobial Activity ◽  
Chitosan Nanoparticles ◽  
Cotton Fabrics ◽  
Diffusion Method ◽  
Acid Dyes ◽  
Disk Diffusion Method ◽  
Morphological Studies ◽  
Colorimetric Data ◽  
Ft Ir ◽  
Dyed Fabrics

Replacement of conventional chemicals with modern fewer hazards one has great attention via green chemistry. Chitosan nanoparticles (CSNPs) were prepared from the reaction of chitosan (0.2 g/100 ml) with tripolyphosphate (o.1 g/100 ml) through the ionotropic gelation method. CSNPs with different concentrations were used for cotton fabrics to impart antimicrobial activity and enhance their dyeing affinity towards acid dyes. FT-IR spectroscopy and TEM imaging were used to characterized CSNPs. SEM and TGA. Effect of CSNPs concentrations on cotton fabric dyeing affinity was recorded from colorimetric data. The antimicrobial activity of treated dyed fabrics was evaluated via disk diffusion method against S. aureus, E. coli, Candida, and Aspergillus Niger. Results have shown that cotton fabrics treated with 0.3 g/100 ml record the highest K/S values, Corresponding to the highest dyeing affinity towards acid dyes. In addition, treated dyed cotton fabrics were showed higher antimicrobial activity towards tested microorganisms because of the presence of CSNPs. Morphological studies on the untreated, treated, and treated dyed cotton fabrics via SEM imaging confirmed that CSNPs coated cotton fabrics. In addition, the light and washing fastness properties of these fabrics confirmed their durability. Therefore, CSNPs were used to impart cotton fabrics' antibacterial activity and improve their dyeability with acid dye.

scholarly journals Azo compounds based on 2-(4'-aminophenyl)-4-quinoline carboxylic acid: synthesis and properties

2020 ◽  
Vol 61 (1) ◽  
pp. 146-151
Author(s):  
Mirzoolim H. Mavlonov ◽  
◽  
Dmitry N. Kuznetsov ◽  
Konstantin I. Kobrakov ◽  
◽  
...  
Keyword(s):  
Light Exposure ◽  
Electronic Absorption Spectra ◽  
Uv Spectroscopy ◽  
Acid Synthesis ◽  
Point Of View ◽  
Azo Compounds ◽  
Color Fastness ◽  
Acid Dyes ◽  
Chemical Structures ◽  
Quinolinecarboxylic Acid

Synthesis and studies of the properties of dyes for coloring textile materials from fibers of various chemical structures, which contain, in addition to chromophore, also pharmacophore groups in the molecule, which impart biocidal properties to both the dyes themselves and the materials dyed by them, are interesting both theoretically and from an applied point of view. The article presents data on the synthesis of a series of previously undescribed azo compounds based on 2-(4'-aminophenyl)-4-quinolinecarboxylic acid and aromatic hydroxy- and aminocompounds of the naphthalene series. Five naphthylazo derivatives of 2-(4'-aminophenyl)-4-quinolinecarboxylic acid were synthesized in high yields. The structures of the synthesized azo compounds were confirmed by mass-spectrometry and UV-spectroscopy. In the electronic absorption spectra, the absorption maximum of the synthesized azo compounds lies in the range of 480-550 nm, in contrast to the initial diazo and azo components, the absorption maxima of which lie in the near UV region of the spectrum. Dyeing techniques have been developed that provide optimal indicators for the process of coloration of polypeptide fibers (wool and nylon) with synthesized dyes. The colors of the samples have bright, and deep colors of orange-red-violet scales. The obtained painted samples were examined for color fastness to wet processing according to GOST 9733.4-83, sweat GOST 9733.6-83 and light exposure GOST 11279.2-83. It has been shown that the synthesized azo compounds can be used for coloring woolen and polyamide fibers and provide satisfactory performance properties of dyes, which is consistent with generally accepted ideas about acid dyes. Samples of dyed polyamide fabric showed satisfactory color fastness to light (1-3 points), the best result was shown by wool samples dyed with the studied dyes.

scholarly journals A salt-free, zero-discharge and dyebath-recyclable circular coloration technology based on cationic polyelectrolyte complex for cotton fabric dyeing

2021 ◽  
Author(s):  
Wen-Yi Wang ◽  
Jia-Chi Chiou ◽  
Wan-Xue Chen ◽  
Jia-Li Yu ◽  
Chi-wai Kan
Keyword(s):  
Textile Industry ◽  
Polyelectrolyte Complex ◽  
Cationic Polyelectrolyte ◽  
Cotton Fabrics ◽  
Acid Dyes ◽  
Anionic Dyes ◽  
Colour Measurements ◽  
Grade 3 ◽  
Dyed Fabrics ◽  
Dyed Fabric

Abstract Textile industry is one of the most polluting industries due to the large quantities of dyeing wastewater it generates and discharges. Herein, we report an eco-friendly and sustainable circular coloration technology based on cationic polyelectrolyte complex to realise salt-free, zero-effluent-discharge circular dyeing for cotton fabrics with a recyclable dyebath by using a typical cationic polyelectrolyte polyhexamethylene biguanide (PHMB) bonded with anionic dyes. The cotton fabrics were first treated with PHMB and then dyed with three commercial acid dyes. Colour measurements show that the colour strength is controllable by adjustment of concentrations of both PHMB and the dyebath. The dyed fabric samples were found to have good/excellent colour levelness (< 0.49), and the colour fastness (Grade 3 ~ 5) was basically satisfactory and acceptable. The dyebath was proved to be recyclable for circular dyeing occurring at room temperature, which greatly reduces consumption of both water and heat energy for textile dyeing. Meanwhile, the dyed fabrics showed antimicrobial activity, particularly for the gram-positive S. aureus, which may help reduce the healthcare-associated infections that transmit through textiles. These results suggest that cationic polyelectrolyte-based circular dyeing could provide a promising and practicable strategy to address the pollution issue caused by wastewater generated in dyeing process in the textile industry.

An environmentally friendly bleaching process for cotton fabrics: mechanism and application of UV/H2O2 system

Cellulose ◽  
2019 ◽  
Vol 27 (2) ◽  
pp. 1071-1083
Author(s):  
Nanfang Wang ◽  
Peixin Tang ◽  
Cunyi Zhao ◽  
Zheng Zhang ◽  
Gang Sun
Keyword(s):  
Environmentally Friendly ◽  
Cotton Fabrics ◽  
Bleaching Process ◽  
H2o2 System

scholarly journals The Preparation, Thermal Properties, and Fire Property of a Phosphorus-Containing Flame-Retardant Styrene Copolymer

Materials ◽  
2019 ◽  
Vol 13 (1) ◽  
pp. 127 ◽  
Author(s):  
Yu Sun ◽  
Yazhen Wang ◽  
Li Liu ◽  
Tianyuan Xiao
Keyword(s):  
Thermal Properties ◽  
Thermogravimetric Analysis ◽  
Flame Retardant ◽  
Oxygen Index ◽  
Limiting Oxygen Index ◽  
Chemical Structures ◽  
1H Nuclear Magnetic Resonance ◽  
Phosphorus Containing ◽  
Ft Ir ◽  
Ft Ir Spectroscopy

A 9,10-dihydro-9-oxa-10-phosphaphenanthrene 10-oxide (DOPO) acrylate, (6-oxidodibenzo [c,e][1,2] oxaphosphinin-6-yl) methyl acrylate (DOPOAA), has been prepared. Copolymers of styrene (St) and DOPOAA were prepared by emulsion polymerization. The chemical structures of copolymers containing levels of DOPOAA were verified using Fourier transform infrared (FT-IR) spectroscopy and 1H nuclear magnetic resonance (1H-NMR) spectroscopy. The thermal properties and flame-retardant behaviors of DOPO-containing monomers and copolymers were observed using thermogravimetric analysis and micro calorimetry tests. From thermogravimetric analysis (TGA), it was found out that the T5% for decomposition of the copolymer was lower than that of polystyrene (PS), but the residue at 700 °C was higher than that of PS. The results from micro calorimetry (MCC) tests indicated that the rate for the heat release of the copolymer combustion was lower than that for PS. The limiting oxygen index (LOI) for combustion of the copolymer rose with increasing levels of DOPOAA. These data indicate that copolymerization of the phosphorus-containing flame-retardant monomer, DOPOAA, into a PS segment can effectively improve the thermal stability and flame retardancy of the copolymer.

scholarly journals Modification of cotton fabrics with 2-diethylaminoethyl chloride for salt-free dyeing with anionic dyes

Cellulose ◽  
2021 ◽  
Author(s):  
Peixin Tang ◽  
Leilah-Marie E. Lockett ◽  
Mengxiao Zhang ◽  
Gang Sun
Keyword(s):  
Electrostatic Interactions ◽  
Light Exposure ◽  
Dye Adsorption ◽  
Cost Effective ◽  
Cotton Fabrics ◽  
Cotton Cellulose ◽  
Hydroxyl Groups ◽  
Anionic Dyes ◽  
Free System ◽  
Untreated Cotton

AbstractA chemical modification of cotton fabrics by 2-diethylaminoethyl chloride (DEAE-Cl) was achieved, and the resulted cotton fabrics demonstrated salt-free dyeing properties with anionic dyes. Nucleophilic property of hydroxyl groups in cotton cellulose was enhanced under alkaline conditions and could react with DEAE-Cl, a chemical possessing both nucleophilic and electrophilic sites. The monolayered DEAE-grafted cotton cellulose could further react with DEAE-Cl to form multiple cationic quaternary ammonium salts (denoted as DEAE@Cotton), which are highly interactive with anionic dye molecules. The strong electrostatic interactions between the DEAE@Cotton and the dyes eliminated the use of inorganic salts in cotton dyeing process. The chemical structure and property of DEAE@Cotton were characterized and compared with untreated cotton. The DEAE@Cotton can be dyed in a salt-free system, and the dye exhaustion was faster than the conventional dyeing method due to the robust electrostatic interactions of the fabrics with anionic dyes. The dyed fabrics demonstrated outstanding color fastness under repeated washing, light exposure, and crocking. The dye adsorption process on DEAE@Cotton follows Langmuir isotherm model (R2 = 0.9667). The mechanism of enhanced dyeability was experimentally proved by treating the fabric with other anionic dyes in a salt-free system, proving the process to be environmentally friendly and cost-effective. Graphic abstract

scholarly journals Environmentally Friendly Nafion-Catalyzed Synthesis of Substituted 2-Ethyl-3-Methylquinolines from Aniline and Propionaldehyde under Microwave Irradiation

Catalysts ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 877
Author(s):  
Chieh-Kai Chan ◽  
Chien-Yu Lai ◽  
Cheng-Chung Wang
Keyword(s):  
Reaction Mechanism ◽  
Microwave Irradiation ◽  
Single Crystal ◽  
Diffraction Analysis ◽  
Environmentally Friendly ◽  
Single Crystal Diffraction ◽  
X Ray ◽  
Related Data ◽  
Heating Source ◽  
Chemical Structures

Herein, we report a facile synthetic methodology for the preparation of 2,3-dialkylquinolines from anilines and propionaldehydes. This cyclization involved environmentally friendly Nafion® NR50 as an acidic catalyst with microwave irradiation as the heating source. A series of substituted 2-ethyl-3-methylquinolines were prepared from various anilines and propionaldehyde derivatives through this protocol with good to excellent yields. Some new chemical structures were confirmed by X-ray single-crystal diffraction analysis and the related data were provided. The plausible reaction mechanism studies are also discussed.

Thermal properties of polybenzoxazine exhibiting improved toughness: Blending with cyclodextrin and its derivatives

2021 ◽  
pp. 095400832110130
Author(s):  
Hailong Li ◽  
Sipei Zhao ◽  
Li Pei ◽  
Zihe Qiao ◽  
Ding Han ◽  
...  
Keyword(s):  
Thermal Properties ◽  
Hydrogen Bonds ◽  
High Performance ◽  
Practical Application ◽  
Scanning Calorimetry ◽  
Thermoset Resins ◽  
Chemical Structures ◽  
Microscopy Techniques ◽  
Fractured Surface ◽  
Scanning Electron

Polybenzoxazines are emerging as a class of high-performance thermoset polymers that can find their applications in various fields. However, its practical application is limited by its low toughness. The cyclic β-cyclodextrin and a newly synthesized derivative (β-cyclodextrin-MAH) were separately blended with benzoxazine to improve the toughness of polybenzoxazine. The results revealed that the maximum impact strength of the blend was 12.24 kJ·m−2 and 14.29 kJ·m−2 when 1 wt.% of β-Cyclodextrin and β-Cyclodextrin-MAH, respectively, were used. The strengths were 53% and 86% higher than that of pure polybenzoxazine. The curing reaction, possible chemical structures, and fractured surface were examined using differential scanning calorimetry, Fourier transform infrared spectroscopy, and scanning electron microscopy techniques to understand the mechanism of generation of toughness. The results revealed that the sea-island structure and the presence of hydrogen bonds between polybenzoxazine and β-cyclodextrin and β-cyclodextrin-MAH resulted in the generation of toughness. Furthermore, the curves generated during thermogravimetric analysis did not significantly change, revealing the good thermal properties of the system. The phase-separated structure and the hydrogen bonds present in the system can be exploited to prepare synergistically tough polybenzoxazine exhibiting excellent thermal properties. This can be a potential way of modifying the thermoset resins.

scholarly journals Color-Variable Photodynamic Antimicrobial Wool/Acrylic Blended Fabrics

Materials ◽  
2020 ◽  
Vol 13 (18) ◽  
pp. 4141
Author(s):  
Tingting Wang ◽  
Wangbingfei Chen ◽  
Tingting Dong ◽  
Zihao Lv ◽  
Siming Zheng ◽  
...  
Keyword(s):  
Low Cost ◽  
Pathogen Transmission ◽  
Cationic Dyes ◽  
Light Illumination ◽  
Antibacterial Studies ◽  
Wool Fibers ◽  
Visible Light Illumination ◽  
Potential Applications ◽  
Dyed Fabrics ◽  
Acrylic Fibers

Towards the goal of developing scalable, economical and effective antimicrobial textiles to reduce infection transmission, here we prepared color-variable photodynamic materials comprised of photosensitizer (PS)-loaded wool/acrylic (W/A) blends. Wool fibers in the W/A blended fabrics were loaded with the photosensitizer rose bengal (RB), and the acrylic fibers were dyed with a variety of traditional cationic dyes (cationic yellow, cationic blue and cationic red) to broaden their color range. Investigations on the colorimetric and photodynamic properties of a series of these materials were implemented through CIELab evaluation, as well as photooxidation and antibacterial studies. Generally, the photodynamic efficacy of these dual-dyed fabrics was impacted by both the choice, and how much of the traditional cationic dye was employed in the dyeing of the W/A fabrics. When compared with the PS-only singly-dyed material, RB-W/A, that showed a 99.97% (3.5 log units; p = 0.02) reduction of Staphylococcus aureus under visible light illumination (λ ≥ 420 nm, 60 min), the addition of cationic dyes led to a slight decrease in the photoinactivation ability of the dual-dyed fabrics, but was still able to achieve a 99.3% inactivation of S. aureus. Overall, our findings demonstrate the feasibility and potential applications of low cost and color variable RB-loaded W/A blended fabrics as effective self-disinfecting textiles against pathogen transmission.

Synthesis, Application and Antimicrobial activity of New Acid Dyes based on 3-Amino-2-thioxo-4-thiazolidinone nucleus on Wool and Silk fabrics

2021 ◽  
Vol 18 ◽  
Author(s):  
Fatma A. Mohamed ◽  
Shaban Elkhabiry ◽  
Ismail A. Ismail ◽  
Attia O. Attia
Keyword(s):  
Antimicrobial Activity ◽  
Fastness Properties ◽  
Acid Dyes ◽  
Light Fastness ◽  
Gram Positive ◽  
Gram Negative ◽  
Wool Fabrics ◽  
Infra Red ◽  
Dyed Fabrics ◽  
Silk Fabrics

: The dyes are synthesized by 3-Amino-2-thioxo-4thiazolidinone (N-Amino rhodanine) with glutaraldehyde or Terephthalaldehyde by 2:1 mole to form a and b then coupled with diazonium salts p-Amino benzenesulfonic acid and 4-Amino 3,4 disulfoazobenzeneazobenzene by 2:1 to form new different bis monoazo a1, b1 and diazo a2 and b2 acid dyes. Therefore, the synthesized dyes were applied to both silk and wool fabric materials. We also evaluated the antimicrobial activity for these dyed fabrics against two model gram-negative and gram-positive bacteria. Further, the chemical composition of these dyes is emphasized by elemental analysis Aims: This paper aims to synthesize, apply dye and antimicrobial to four new acid dyes based on derivatives of N-Amino rodanine as a chromophoric group. These dyes are used in dyeing silk and wool with the good lightfastness and are also excellent for washing, rubbing, and sweating fastness. Also, we measure antimicrobial activity for silk and wool fabrics toward Gram-negative, Gram-positive. Background: The search for a synthesis of new acid dyes has antimicrobial for gram-negative and gram-positive. These dyes are mainly used on silk and wool fabrics which have excellent for light fastness, washing, rubbing, and sweating fastness. Objective: The present studies were aimed at synthesis, characterization and antimicrobial toward gram- negative and gram-positive. Methods: The infra-red spectrum was recorded using an Infra-red spectrometer, Perkin Elmer/1650 FT-IR. The 1H-NMR spectra were recorded using a Varian 400MHz spectrometer. The absorbance of the dyes was measured in the ultraviolet-visible region between 300 and 700 nm by a UNICAM UV spectrophotometer. The dye uptake by wool and silk fabrics was measured using a Shimadzu UV-2401PC (UV/V is spectrophotometer at λmax) before and after dyeing. The produced dyes were found to have good antimicrobial activity against a variety of bacteria. Results and Discussion: The compounds a1, b1, a2 &b2 shows good antimicrobial activity toward gram-negative (E. coli), gram-positive (S. aurous). The data showed that exhaustion and the fastness properties of silk and wool dyed fabrics were both very high. Conclusion: This work prepares newly synthesized acid dyes based on 3-Amino-2-thioxo-4thiazolidinone derivatives and uses them for dyeing wool and silk fabrics. Both synthetic dyes have good light fastness and fastness properties. Also, all dyes have a good antimicrobial effect.

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