A Novel Durable and Water-Soluble N-Halamine Precursor for Antibacterial Cellulose Fabrics

2020 ◽  
Vol 7 (3) ◽  
pp. 34-41
Author(s):  
Denghui Xu ◽  
Xingbo Ma ◽  
Ping Zhu ◽  
Zhiming Jiang
Keyword(s):  
Mammalian Cells ◽  
Cotton Fabrics ◽  
Water Soluble ◽  
Optimal Conditions ◽  
H Nmr ◽  
Ft Ir ◽  
Coated Fabrics ◽  
Cellulose Fabrics ◽  
Coated Cotton ◽  
Excellent Stability

A novel, water-soluble N-halamine precursor based on s-triazine (2-(aminoethanesulfonic sodium salt)-4-(4-imino-2,2,6,6- tetramethylpiperidine)-6-monochloro-1,3,5-triazine, ATDT) was synthesized and characterized by FT-IR and 1H-NMR. The cotton fabrics were functionalized with ATDT through the traditional pad-dry-cure method, and optimal conditions were successfully obtained by measuring the active chlorine content. The antibacterial activity of ATDT-coated cotton fabrics was investigated against Staphylococcus aureus and Escherichia coli O157:H7. As a result, 100% of bacteria could be inactivated within a brief contact time. Cell viability was also determined and the results showed that ATDT-modified cotton fabrics had good cytocompatibility to mammalian cells. In addition, the preparation process had little effect on the tensile strength and whiteness of cotton fabrics, although the air permeability showed a slight decrease. The chlorinated ATDT-coated fabrics showed excellent stability against storage and washing.

scholarly journals Preparation and Mechanism of Flame-Retardant Cotton Fabric with Phosphoramidate Siloxane Polymer through Multistep Coating

Polymers ◽  
2020 ◽  
Vol 12 (7) ◽  
pp. 1538
Author(s):  
Denghui Xu ◽  
Shijie Wang ◽  
Yimin Wang ◽  
Yun Liu ◽  
Chaohong Dong ◽  
...  
Keyword(s):  
Infrared Spectroscopy ◽  
Thermogravimetric Analysis ◽  
Flame Retardant ◽  
Flame Retardancy ◽  
Cotton Fabrics ◽  
Attenuated Total Reflection ◽  
Water Soluble ◽  
Cone Calorimetry ◽  
Siloxane Polymer ◽  
Coated Cotton

To improve the water solubility of phosphoramidate siloxane and decrease the amount of flame-retardant additives used in the functional coating for cotton fabrics, a water-soluble phosphoramidate siloxane polymer (PDTSP) was synthesized by sol-gel technology and flame-retardant cotton fabrics were prepared with a multistep coating process. A vertical flammability test, limited oxygen index (LOI), thermogravimetric analysis, and cone calorimetry were performed to investigate the thermal behavior and flame retardancy of PDTSP-coated fabrics. The coated cotton fabrics and their char residues after combustion were studied by attenuated total reflection infrared spectroscopy (FTIR-ATR), scanning electron microscopy (SEM), and X-ray photoelectron spectroscopy (XPS). All results presented that PDTSP-coated cotton fabrics had good flame retardancy and char-forming properties. PDTSP coating was demonstrated to posess gas-phase flame-retardant mechanism as well as a condensed phase flame-retardant mechanism, which can be confirmed by thermogravimetric analysis-Fourier transform infrared spectroscopy (TG-IR) and cone calorimetry test. Also, the preparation process had little effect on the tensile strength of cotton fabrics, although the air permeability and whiteness had a slight decrease. After different washing cycles, the coated samples still maintained good char-forming properties.

scholarly journals Optically Active Polyurethane/Silica Aerogel Coated Cotton Fabrics for Thermal Protection

2021 ◽  
Vol 8 ◽  
Author(s):  
Ling Lin ◽  
Ziyin Li ◽  
Haiyan Mao ◽  
Wenyao Li ◽  
Chaoxia Wang
Keyword(s):  
Mechanical Properties ◽  
Thermal Stability ◽  
Thermal Protection ◽  
Cotton Fabrics ◽  
Retention Performance ◽  
Thermal Insulating ◽  
Film Forming ◽  
Warmth Retention ◽  
Coated Fabrics ◽  
Coated Cotton

Application of SiO2 aerogel in thermal protective clothing has been limited due to its brittle nature, ordinary mechanical properties, and poor film forming performance. This work is aimed to develop thermal protective cotton fabrics by coating blended OPU/SiO2 aerogel with enhanced mechanical properties and thermal protection performance. The OPU/SiO2 aerogel composites with different ratio were applied onto cotton fabrics by knife-coating. The morphology, chemical component, crystalline structure, thermal stability and compression strength were characterized by scanning electron microscopy (SEM), Fourier transfer Infrared spectroscopy (FTIR), X-ray diffraction (XRD), thermogravimetric analysis (TG) and compression test, respectively. Besides, the warmth retention performance and heat protection performance together with air and moisture permeability of the coated fabrics were studied. The results showed that OPU/SiO2 aerogel were successfully coated onto cotton fabrics with enhanced mechanical properties and thermal stability together with better film forming capacity. The heat transfer coefficient of the coated cotton fabrics was distinctly dropped due to the synergistic effect of OPU and SiO2 aerogel, which resulted in higher warmth retention. The OPU/SiO2 aerogel coated fabrics exhibited obvious heat insulation performance with its surface temperate almost 4°C than the uncoated fabrics. This work demonstrates a new strategy of fabricating stronger thermal insulating textiles using OPU/SiO2 aerogel composites.

scholarly journals Heat resisting and water-soluble chocolate polyesters containing azomethine group

2017 ◽  
Vol 35 (2) ◽  
pp. 303-312 ◽  
Author(s):  
Kevser Temizkan ◽  
İsmet Kaya
Keyword(s):  
Cyclic Voltammetry ◽  
Band Gap ◽  
Gel Permeation Chromatography ◽  
Mechanical Analysis ◽  
Water Soluble ◽  
Azomethine Group ◽  
Dynamical Mechanical Analysis ◽  
Mass Distributions ◽  
H Nmr ◽  
Ft Ir

Abstract In this study, soluble in water poly(azomethine-ester)s (PAEs) were synthesized via elimination reactions of aromatic dihydroxy compounds containing imine bonding with terephthaloyl chloride. The structures of Schiff bases (SBs) and PAEs containing different aliphatic chains were confirmed by FT-IR, 1H-NMR, 13C-NMR and UV-Vis analyses. Physicochemical properties of the new polymers were characterized. Thermal properties of the compounds were investigated by TGA-DTA, DMA and DSC. According to TGA measurements, the starting degradation temperatures (Ton) of P-1, P-2, P-3, and P-4 poly(azomethine-ester)s were found as 255 °C, 232 °C, 222 °C, and 221 °C, respectively. The starting degradation temperatures of the poly(azomethine-ester)s were higher than their Schiff base compounds. According to dynamical mechanical analysis (DMA) measurements, glass transition temperature (Tg) of P-1, P-2, P-3, and P-4 poly(azomethine-ester)s were found as 95 °C, 138 °C, 140 °C, and 145 °C, respectively. The morphological and topographic properties of the PAEs containing azomethine linkage in the main chain were investigated by FE-SEM and AFM, respectively. The molecular mass distributions of PAEs were determined by gel permeation chromatography (GPC). Electrochemical (E′g) and optical band gap (Eoptg ) values of the prepared SBs and PAEs were calculated from cyclic voltammetry (CV) and UV-Vis analyses. The electrochemical band gap (E′g) values of P-1, P-2, P-3 and P-4 were found as 2.44 eV, 2.41 eV, 2.39 eV and 2.39 eV, respectively, from the cyclic voltammetry.

Preparation of Terephthalic Acid (TPA) and Dioctyl Terephthalate (DOTP) by Anthracite's Alkali Oxygen Oxidation

2014 ◽  
Vol 541-542 ◽  
pp. 95-99
Author(s):  
Kun Du ◽  
Ming Lei Lian ◽  
Zhi Fang Fan ◽  
Yu Li
Keyword(s):  
Aqueous Solution ◽  
Terephthalic Acid ◽  
Potassium Hydroxide ◽  
Water Soluble ◽  
Reaction Conditions ◽  
H Nmr ◽  
Optimum Reaction ◽  
Final Yield ◽  
Ft Ir ◽  
Oxygen Oxidation

TPA was synthesized by a two step reaction. Firstly, water-soluble coal acids (CA) was obtained by oxygen-oxidation at 260°C in all aqueous solution of potassium hydroxide, and then crud TPA was got by isomerization of the CA with the existence of CdCO3 catalyst and CO2 pressure. The optimum reaction conditions to get crude TPA were 4% amount of CdCO3 catalyst, and reacted at 420°C with initial 3.0MPa CO2 pressure. Pure TPA was obtained by a separation step and the yield of pure TPA is 37.16% (based on CA). Furthermore, DOTP was synthesized by the refined TPA and isooctanol. The influence of mole ratio of TPA and isooctanol, amount of catalyst and reaction time on the final yield of DOTP were discussed. The purity of TPA was detected by HPLC and DOTP was detected by FT-IR, 1H-NMR to get confirmatory results.

scholarly journals Construction of Biological Flame Retardant Layer on Cotton Fabric via Photografting of Nucleotide/Amino Acid Monomers

2021 ◽  
Author(s):  
yutong liu ◽  
Xiao Wang ◽  
Zhenbao Li ◽  
Ju Wei ◽  
Bing Du
Keyword(s):  
Flame Retardant ◽  
Cotton Fabric ◽  
Chemical Structure ◽  
Pyrolysis Temperature ◽  
Cotton Fabrics ◽  
Scanning Electron Micrographs ◽  
Double Bonds ◽  
H Nmr ◽  
Ft Ir ◽  
Synergistic Flame Retardant

Abstract The 5’-adenylicacid (AMP-Na2) is modified to introduce unsaturated double bonds for photografting onto cotton fabrics together with L-cysteine (L-Cys) monomer to prepare synergistic flame-retardant cotton fabrics. The chemical structure of AMP-Na2/L-Cys monomers, the surface morphology, residual carbon morphology, thermal property and flame retardant property of photografted flame retardant cotton fabrics are analyzed. FT-IR and 1H NMR spectra verified the AMP-Na2 and L-Cys monomers with unsaturated double bonds. Scanning electron micrographs revealed the carbon residue of photografted fiber maintains a natural curled and fibers shape. TGA showed the major pyrolysis temperature of photografted cotton fabric declined by 42℃, with the weight loss reduced by 21.6%, proving that good charring effect. The continuous burning and smoldering time of photografted cotton fabric are decreased to 0s. The experimental results indicate that AMP-Na2/L-Cys monomers can reveal good durability and remarkable flame retardancy property to cotton fabrics via facile treatment of photografting.

The Structure and Properties of Sulfo-Butylated Celluluse Ether (SBC) Based Water-Reducing Agents

2014 ◽  
Vol 556-562 ◽  
pp. 433-440
Author(s):  
Halidan Maimaiti ◽  
Xuekelaiti Aerken
Keyword(s):  
Cement Paste ◽  
Water Soluble ◽  
Crystalline Cellulose ◽  
Cellulose Ether ◽  
Hardened Cement ◽  
Structure And Properties ◽  
Hardened Cement Paste ◽  
Sem Images ◽  
H Nmr ◽  
Ft Ir

Abandoned cellulose was treated with acid to prepare Micro-Crystalline Cellulose (MCC) holding affirmative polymerization, which was then treated with 1,4–butanesultone (BS) to synthesize water-soluble Sulfo-Butylated Cellulose ether (SBC). The structure of the SBC was characterized by means of FT-IR, 1H NMR, SEM, and XRD, and its relationship to function was investigated based on the polymerization of MCC and Degree of Substitution (DS). SEM images of hardened cement were also studied. The results indicated that when the polymerization of the MCC was smaller than 96 and the DS greater than 0.375, SBC exhibited water-reduction. When sulfonated cellulose was mixed into the cement paste, its retarding effect slowed hydration early in the aging process, so that later the structure of hardened cement paste became more uniform and compact than that of control.

New Anti-Aging and Anti-Wrinkle Material: Properties and Activities of Nanoparticle Containing Poly(Aspartic Acid) Derivatives

2019 ◽  
Vol 59 ◽  
pp. 57-76
Author(s):  
Hyo Gyeong Yu ◽  
Hong Geun Ji ◽  
Ju Duck Kim ◽  
Hye In Jang
Keyword(s):  
Aspartic Acid ◽  
Chemical Structure ◽  
Synthetic Polymer ◽  
Water Soluble ◽  
Skin Permeability ◽  
Collagenase Activity ◽  
H Nmr ◽  
Emulsifying Agent ◽  
Ft Ir ◽  
Alpha Amino Acid

Polymers such as sodium polyacrylate; polysaccharides in starch; polyamino acids, which are the products of alpha-amino acid condensation; and polypeptides are widely used in cosmetics and pharmaceuticals. They are used as viscosity agent, emulsifying agent, and carriers for drug delivery. However, we studied the function of polymers as activity agent, especially that of synthesized poly(aspartic acid). Poly(aspartic acid) is a biocompatible synthetic polymer. It is a water-soluble polyamide containing carboxylic pendants prepared from polysuccinimide, the polycondensate of aspartic acid monomer, by hydrolysis. In this study, we prepared poly(aspartic acid) derivatives conjugated with L-lysine or L-lysine and other materials. The chemical structure of these polymers was confirmed by FT-IR and 1H-NMR spectroscopy. Moreover, these novel poly(aspartic acid) derivatives stimulated typeⅠcollagen biosynthesis and inhibited MMP-1(collagenase) activity. We could conclude that the microfludization process improved skin permeability and confirmed better permeability than that achieved with existing nano emulsions.

Antibacterial Activity of Chemogenic Copper Nanoparticles Coated Cotton Fabrics against Pyogenic Bacteria Isolated from Post Operative Patients

2012 ◽  
Vol 622-623 ◽  
pp. 842-846
Author(s):  
S. Karthick Raja Namasivayam ◽  
Arul Maximus Rabel ◽  
Teena Abhraham
Keyword(s):  
Copper Nanoparticles ◽  
Chemical Reduction ◽  
Uv Spectroscopy ◽  
Colour Change ◽  
Cotton Fabrics ◽  
Bacterial Strains ◽  
Chemical Reduction Method ◽  
Coated Fabrics ◽  
Diffusion Assay ◽  
Coated Cotton

In this present study, copper nanoparticles coated on the cotton fabrics was evaluated for the antibacterial property against bacterial strains isolated from post operative patients.In this study, CUNPs synthesized by chemical reduction method and the synthesized nanoparticles characterized by UV spectroscopy, energy dispersive X ray spectroscopy and further characterized for its size by SEM. CUNPs coated on the bleached cotton fabrics by pad dry cure method. Coating of CUNPs to cotton fabric conferred by SEM and FTIR. The coated fabrics were examined in the range of basic physical–mechanical parameters such as the tensile strength, the bursting strength and air permeability.Anti bacterial activity was determined against the clinical isolate of Staphylococcus aureus, Escherichia coli and Pseudomonas aeruginosa by agar diffusion assay. Copper nanoparticles synthesized by chemical reduction was primarly confirmed by the colour change of the reaction mixture from blue to olive green, plasmon absorption maxima at 600 nm and uniform sp

scholarly journals Novel flame retardant and antibacterial agent containing MgO NPs, phosphorus, nitrogen and silicon units for functionalise cotton fabrics

2019 ◽  
Vol 9 (5) ◽  
pp. 4272-4278 ◽  
Keyword(s):  
Flame Retardant ◽  
Cotton Fabrics ◽  
Licorice Root ◽  
Root Extract ◽  
Mgo Nanoparticles ◽  
Mechanical And Physical Properties ◽  
Ft Ir ◽  
Prepared Composite ◽  
Flame Retardant Properties ◽  
Coated Fabrics

During this research, Magnesium oxide (MgO) nanoparticles were synthesised synthesized using Licorice root extract. Synthesized nanoparticles have been characterized using FT-IR, TEM and XRD. The analysis confirmed that the nanoparticles size were ranged from 20 to 40 nm with cubic structure. This nanoparticle was used in the formulation with new synthesised composite containing phosphor, nitrogen and silicon to enhance thermal and flame retardant properties of cotton fabrics. This composite has synthesised via reaction of 3-(hydroxy(phenyl)phosphoryl)propanoic acid and Triethanolamine, and then with triethoxy(3-isocyanatopropyl)silane. Prepared composite was confirmed through NMR and FT-IR measurements. Treated fabric with prepared composite and nanoparticles have been evaluated through elemental analysis, TGA, LOI, antibacterial, mechanical and physical properties. The nanoparticle coated fabrics with prepared composite showed a good degree of microbial resistance and excellent fire proofing rating

scholarly journals Synthesis and Characterization of Amphiphilic Diblock Copolymer by Reverse Iodine Transfer Polymerization (RITP)

2019 ◽  
Vol 27 (2) ◽  
pp. 185-202 ◽  
Author(s):  
Wahiba Chaibi ◽  
Lamia Bennabi ◽  
Imene Boukhouya ◽  
Kaddour Guemra
Keyword(s):  
Diblock Copolymer ◽  
Self Assembly ◽  
Molecular Iodine ◽  
Water Soluble ◽  
H Nmr ◽  
Wide Range ◽  
Dynamic Light Scattering Technique ◽  
Ft Ir ◽  
Iodine Transfer

Abstract Iodine transfer radical homo- and diblock copolymerization of N-[3-(dimethylamino)propyl] methacrylamide (DMAPMA) with methyl methacrylate (MMA) were carried out in the presence of iodine I2 and 2,2′-azobis(isobutyronitrile) (AIBN) as chain transfer agent and initiator, respectively. Using reverse iodine transfer polymerization (RITP) method based on the in situ generation of transfer agents using molecular iodine I2. The homopolymer and copolymer were characterized by FT-IR and 1H NMR. The self-assembly behaviours of diblock copolymer in water are studied by viscosity and tensiometry techniques. The water-soluble fraction of P(DMAPMA-b-MMA) block copolymer formed micelles which were investigated at 25°C in water at 0.2 mg.mL−1 concentration using a tensiometry device. Dynamic light scattering technique (DLS) was performed over a wide range of concentration to determine hydrodynamic size of the aggregates.

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