Solvent Effects on the UV-visible Absorption Spectra of some New Thienylazo-thiazole and Thienylazo-thiophene Dyes
Ehab
Abdel-latif
Mansoura University
author
Asmaa
Mansour
Chemistry Department, Faculty of Science, Mansoura University, 35516 Mansoura, Egypt
author
Ebrahim
Abdel-Galil
Chemistry Department, Faculty of Science, Mansoura University, 35516 Mansoura, Egypt
author
text
article
2018
eng
Facile synthesis of various thienylazo-thiazole and thienylazo-thiophene dyes were described. 2-Amino-5-(2-thienylazo)-thiazole dyes 5 and 6 have been constructed by coupling the diazotized 2-aminothiophenes 1a and/or 1b with 2-amino-4-phenylthiazole (3) and/or 2-(N-methylamino)-4-phenylthiazole (4). Coupling of 2-aminothiophene derivative 1a with 2-acetyl-3-oxo-N-phenylbutanethioamide (7) affected cleavage of one acetyl group to furnish the corresponding 2-acetyl-2-thienylazo-thioacetanilide dye 8 which has been utilized as a precursor for the construction of different 3-methyl-2-substituted-4-thienylazo-thiophenes 10-13 through its treatment with the appropriate alpha-chlorinated reagents (namely; MeCOCH2Cl, PhCOCH2Cl, ClCH2COOEt and ClCH2CN). The effect of solvent polarity on absorption spectra was investigated, as was the relationship between dye structures and absorption in the UV–visible region.
Journal of Textiles, Coloration and Polymer Science
National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology( ASRT)
2682-2024
15
v.
1
no.
2018
1
13
https://jtcps.journals.ekb.eg/article_10035_979051d3f11be7174ff2a777bf2b04f2.pdf
dx.doi.org/10.21608/jtcps.2018.4327.1000
Utilization of Proteinic Biopolymers: Current Status and Future Prospects
Salwa
Mowafi
Proteinic and Man-made Fibres Department, Industrial Textile Research Division, National Research Centre
author
Hosam
El-Sayed
Proteinic and Man-made Fibres Department, Industrial Textile Research Division, National Research Centre
author
Marwa
Abou Taleb
Proteinic and Man-made Fibres Department, Industrial Textile Research Division, National Research Centre
author
text
article
2018
eng
Within the last three decades, environmental pollution has increased the interest of the researchers to find new health and hygiene-related products for mankind. In the textile industry, utilization of low-environmental impact technologies that based on sustainable biopolymers, presents a novel possible way for development of bioactive textiles on a large scale. The purpose of this review is to introduce a general overview on the role of proteinic biopolymers in development of textile industries. Unconventional nom-textile applications of these biopolymers are also outlined. The methods of extraction of proteinic biopolymers from their renewable natural resources were discussed to assign the proper method of extraction.
Journal of Textiles, Coloration and Polymer Science
National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology( ASRT)
2682-2024
15
v.
1
no.
2018
15
31
https://jtcps.journals.ekb.eg/article_19597_942824349b73d9594f2c073004ef3943.pdf
dx.doi.org/10.21608/jtcps.2018.5007.1002
Synthesis and Characterization of Bis-azo 1,2,4,5-Tetrazine Dyestuff
Tawfik
Khattab
National Research Centre
author
Mohamed
Rehan
National Research Centre
author
text
article
2018
eng
The design, synthesis and characterization of symmetrical 3,6-Bis(2-(4-(dodecyloxy)phenyl)-1-(4-(phenyl)diazene)-1,2,4,5-tetrazine are described. The novel sym-tetrazine was prepared by addition reaction of 4-(2-(4-decyloxyphenyl)diazenyl)benzonitrile with hydrazine monohydrate followed by oxidation reaction to afford the corresponding bis(azo)-1,2,4,5-tetrazine. The chemical structure of the sym-tetrazine compound was confirmed by elemental analysis, fourier-transform infrared spectroscopy (FT-IR), and nuclear magnetic resonance (1H and 13C NMR) spectral measurements. The design, synthesis and characterization of symmetrical 3,6-Bis(2-(4-(dodecyloxy)phenyl)-1-(4-(phenyl)diazene)-1,2,4,5-tetrazine are described. The novel sym-tetrazine was prepared by addition reaction of 4-(2-(4-decyloxyphenyl)diazenyl)benzonitrile with hydrazine monohydrate followed by oxidation reaction to afford the corresponding bis(azo)-1,2,4,5-tetrazine. The chemical structure of the sym-tetrazine compound was confirmed by elemental analysis, fourier-transform infrared spectroscopy (FT-IR), and nuclear magnetic resonance (1H and 13C NMR) spectral measurements.
Journal of Textiles, Coloration and Polymer Science
National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology( ASRT)
2682-2024
15
v.
1
no.
2018
33
36
https://jtcps.journals.ekb.eg/article_15557_4ca76a7c58fece9c476c07bb41bf829e.pdf
dx.doi.org/10.21608/jtcps.2018.5033.1003
Investigation of Chitosan Embedded with Silver Vanadate Nanorods and their Optical Properties
A
Abdelghany
Spectroscopy Department, Physics Division, National Research Center
author
Magdy
Abdelaal
Chemistry Department, Faculty of Science, Mansoura University
author
Dalia
Hanna
Chemistry Department, Faculty of Science, Mansoura University
author
Alaa
Aboelkheir
Chemistry Department, Faculty of Science, Mansoura University
author
text
article
2018
eng
Chitosan is a natural polysaccharide polymer which is non-toxic, biodegradable, cationic and biocompatible. Present work study physical and chemical characteristics of pure chitosan thin film and other samples that modified through embedding different concentration of silver vanadate nanorods prepared via solution casting route. Casting route was employed for preparation of chitosan thin films and other sample containing gradient increase of synthesized silver vanadate nanorods.The optical properties have been investigated through ultraviolet–visible (UV/Vis) optical absorption spectroscopy. Experimental data reveals an observable decrease in the values of optical energy gap with increasing content of silver vanadate nanorods which result in enhancement of the sensitivity for all prepared thin films.
Journal of Textiles, Coloration and Polymer Science
National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology( ASRT)
2682-2024
15
v.
1
no.
2018
37
45
https://jtcps.journals.ekb.eg/article_19719_49ea9f987509b72ca2420df0597d9e0a.pdf
dx.doi.org/10.21608/jtcps.2018.5521.1007
Antibacterial Effect of Silver nano Particles Deposited on Polyamide Fabric Treated With Glow Discharge Plasma under Atmospheric Pressure (GDPAP)
Hend
Mohamed
author
A.A.
EL-Halwagy
Textile Research Division, National Research Centre,
author
M.A.
EL-Kashouty
Textile Research Division, National Research Centre
author
A. A.
El- Aaty
Textile Research Division, National Research Centre
author
A.A.
Garamoon
Center of plasma technology, Faculty of science, Al-Azhar university, Nasr city, Cairo , Egypt.
author
text
article
2018
eng
This work studies the possibility of using (GDPAP) to activate the polyamide fabric surface. This activation facilitates the loading of sliver nano particles NPs onto the polyamide fabric and as a result improves its bacterial properties. The washing durability on silver-loaded fabric for Gram-positive bacterium Staphylococcus aureus and Gram-negative bacterium Escherichia coli were estimated. Transimsion Electron Microscopy (TEM) observation of silver nanoparticles showed their shape, and size distribution. The deposition of nanosilver on polyamide fabric was characterized using atomic force microscope (AFM) and amount of silver in fabric was determined by X-ray fluorescence (XRF). The change induced in roughness, wettability, and printability of polyamide 6 fabric is given. The surface resistivity of polyamide is affected after plasma treatment.
Journal of Textiles, Coloration and Polymer Science
National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology( ASRT)
2682-2024
15
v.
1
no.
2018
47
61
https://jtcps.journals.ekb.eg/article_19712_e8e80dbe1676490e4a48ba008c7432e3.pdf
dx.doi.org/10.21608/jtcps.2018.5539.1008
Spectrophotometric Analysis of the Fuzzy Role of UV Irradiation in Commercial Polyethylene Films
A
Abdelghany
Spectroscopy Department, Physics Division, National Research Center
author
M
Meikhail
Physics Department, Faculty of Science, Mansoura University, 355165, Mansoura, Egypt
author
A
Saleh
Physics Department, Faculty of Science, Mansoura University
author
text
article
2018
eng
Fourier transform infrared (FTIR) in combination with UV/Vis spectrophotometric analysis were performed to study the role of UV irradiation on the commercial samples of pristine high-density polyethylene (HDPE) films. X-ray diffraction data reveals an increase in the percent crystallinity which correlated and fitted linearly with irradiation times. FTIR experimental absorption spectra for commercial (HDPE) sample and other samples that irradiated with UV lamp for different prolonged time intervals shows the maintenance of main pseudo four characteristic bands in their positions with different intensities. Careful analysis of FT-IR bands reveals a clear variation in both band position and intensity for samples that irradiated up to 16 hours. UV/Vis. electronic spectra reveal the presence of charge transfer band in the UV region around 210 nm with a small change in their fundamental absorption edge and optical energy gap without any evidence for any other band till the end of measurements. Absorbance intensity was found to varies in relation to the irradiation time and sample thickness. Obtained data may be interpreted in terms of free radical and oxidation reactions of polyethylene.
Journal of Textiles, Coloration and Polymer Science
National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology( ASRT)
2682-2024
15
v.
1
no.
2018
63
72
https://jtcps.journals.ekb.eg/article_19720_3bffaa6672a88318d6db71f7f1cf48dc.pdf
dx.doi.org/10.21608/jtcps.2018.5865.1010
New C-terminal Hydrazide L-Leucine Derivatives as Multi-solvent Low Molecular Weight Organogelators
Mohamed
Abdellatif
Chemistry of tanning materials and leather technology - Chemical industries division - National Research Center
author
Marie
Christine Averlant-Petit
CNRS, Université de Lorraine, LCPM, UMR 7375, Nancy, F-54001, France
author
Stefan
Loïc
CNRS, Université de Lorraine, LCPM, UMR 7375, Nancy, F-54001, France
author
Guillaume
Pickaert
CNRS, Université de Lorraine, LCPM, UMR 7375, Nancy, F-54001, France
author
text
article
2018
eng
Three new low-molecular-weight gelators (LMWGs) based on L-Leucine derivatives bearing different chain lengths (i.e. 9, 12 or 16) were designed and synthesized (designated as 1-3). The N-terminal is carrying the various alkyl chain lengths where the C-terminal is modified with hydrazide moiety. The prepared gelators 1-3 were fully characterized using 1H, 13C NMR, FTIR and mass spectroscopy. The gelation behavior has also been investigated using different organic solvents and oils with determination of critical gelation concentration (CGC). The self-assembly process was investigated by recording FTIR spectra gel states to investigate the driving forces for gelation process. The morphology of the prepared xerogels was studied using SEM.
Journal of Textiles, Coloration and Polymer Science
National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology( ASRT)
2682-2024
15
v.
1
no.
2018
73
83
https://jtcps.journals.ekb.eg/article_21080_a1ad5876329079e39ece9f9ab83ae2ce.pdf
dx.doi.org/10.21608/jtcps.2018.5976.1011
Immobilization of β-galactosidase on Carrageenan Gel via bio-inspired Polydopamine Coating
Mohamed
Yassin
1 Packing and Packaging Materials Department, National Research Centre, Giza, Egypt
2 Advanced Materials and Nanotechnology Lab., Center of Excellence, National Research Centre, Giza, Egypt
author
Mohamed
Naguib
2 Advanced Materials and Nanotechnology Lab., Center of Excellence, National Research Centre, Giza, Egypt
3 Polymers and Pigments Department, National Research Centre, Giza, Egypt
author
Mona
Abdel Rehim
1 Packing and Packaging Materials Department, National Research Centre, Giza, Egypt
author
Korany
Ali
2 Advanced Materials and Nanotechnology Lab., Center of Excellence, National Research Centre, Giza, Egypt
4 Applied Organic Chemistry Department, National Research Centre, Giza, Egypt
author
text
article
2018
eng
In the context of diligent efforts directed to develop new polymeric matrices for enzyme immobilization, we developed carrageenan gel disks activated with bio-inspired polydopamine layer. The carrageenan gel disks were firstly treated with polycationic polymer (hyperbranched polyamidoamine) followed by a polydopamine layer. Such a layer can act as an active platform for the covalent immobilization of enzymes via Michael addition and Schiff base. The mechanical strength of the coated gel disks was obviously enhanced. β-galactosidase was successfully immobilized with a loading efficiency of about 52 %. Furthermore, the immobilized β-galactosidase exhibited enhanced activity at a broader range of pH and temperature. Additionally, the immobilized β-galactosidase preserved around 80 % of the initial activity during the eleven reusability cycles. Generally, activation of the gel disks with the bio-inspired polydopamine layer considered as a safe alternative to the glutaraldehyde due to its cytotoxic. Accordingly, the easily formed carrageenan gel disks coated with polydopamine could have potential as enzyme carrier in drug and food industries.
Journal of Textiles, Coloration and Polymer Science
National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology( ASRT)
2682-2024
15
v.
1
no.
2018
85
93
https://jtcps.journals.ekb.eg/article_19983_798ee101a5bd8e07f3a642d87bca5db7.pdf
dx.doi.org/10.21608/jtcps.2018.6267.1012
Characterization and Physical Studies of Poly (vinyl alcohol)/Sodium Alginate/ Multiwall Carbon Nanotube Biocomposites
Mahrous
Meikhail
Physics Department, Faculty of Science, Mansoura University, Mansoura, Egypt
author
A
Hezma
Spectroscopy Department, Physics Division, National Research Centre, Giza, Egypt
author
Basma
Adel
Physics Department, Faculty of Science, Mansoura University, Mansoura, Egypt
author
text
article
2018
eng
Multiwall carbon nanotubes (MWCNTs) were added to poly-(vinyl alcohol) (PVA)/sodium alginate (SA) bio-blend. PVA/SA was prepared with ratio (80/20) wt%. Different ratios of MWCNTs were added to PVA/SA blend to study the change in its physicochemical properties. The prepared films were characterized by Fourier transform infrared spectroscopy (FTIR), Scanning electron microscopy (SEM), Differentierties that are preferably al scanning calorimetry (DSC) and X-ray diffraction (XRD) analysis to confirm the good miscibility of the two biopolymers and the uniform distribution of the MWCNTs. Mechanical properties, thermal stability, morphological properties, and crystallinity of the polymer matrix before and after blending were evaluated. The enhancement of structural and mechanical properties was observed during the addition of MWCNTs. PVA/SA with the optimum concentration of MWCNTs hoped to be suitable for the field of drug delivery and other various medical applications.
Journal of Textiles, Coloration and Polymer Science
National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology( ASRT)
2682-2024
15
v.
1
no.
2018
95
108
https://jtcps.journals.ekb.eg/article_22048_b6c236a038f281c2878c2ccfe62513f6.pdf
dx.doi.org/10.21608/jtcps.2018.6289.1013