Flame-Retardant Cellulosic Fiber Nanocomposite Based on Aluminum Tetraborate and Aluminum Tungstate
Shohreh
Fakouri Nav
Department of Chemistry, Faculty of Science, University of Guilan, Rasht, Iran
author
Hadi
Fallah Moafi
Department of Chemistry, Faculty of Science, University of Guilan, Rasht, Iran
author
text
article
2019
eng
Nanoaluminum tetraborate (Al2(B4O7)3) and nanoaluminum tungstate (Al2(WO3)3) were prepared by in situ precipitation method on the surface of cellulosic fibers to achieve flame retardant nanocomposite fibers. The prepared nanocomposite fibers were characterized by several techniques such as XRD, SEM, TEM, EDS, and FTIR. Al2(B4O7)3 and Al2(WO3)3 with less than 100 nm in size were dispersed throughout on the surface of the fibers without the formation of large aggregates which showed effective flame retardancy properties. It was found that loading 2.60% Al2(B4O7)3 and 4.95% Al2(WO3)3 onto the cellulosic fibers improved greatly the flame retardancy behavior of nanocomposite fibers which was approved by vertical flame test and limiting oxygen index (LOI) values. The thermal stability and amount of heat release of untreated and flame retardant fibers were evaluated by thermogravimetric (TGA) and differential scanning calorimetry (DSC) analyses. The results showed that the flame retardancy mechanism of the obtained flame retardant nanocomposite fibers probably is a condensed-phase phenomenon due to the formation of a protective char layer that acts as a mass transport barrier and a thermal insulator.
Journal of Textiles and Polymers
ITAST (Iranian Textile Association of Science and Technology)
2322-5203
7
v.
2
no.
2019
3
12
http://www.itast.ir/article_92112_ba70c549034efa0eb0fd687adb5cb8c7.pdf
Investigation of the Effects of Graphene Oxide Nanoparticles and Multi-Wall Carbon Nanotubes on Conductivity and Surface Morphology of Polyester-Viscose Fabric
Hamid
Akbarpour
Department of Textile Engineering, Yazd Branch, Islamic Azad University, Yazd, Iran
author
Abousaeed
Rashidi
Department of Textile Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran
author
Mohammad
Mirjalili
Department of Textile Engineering, Yazd Branch, Islamic Azad University, Yazd, Iran
author
Ali
Nazari
Department of Textile Engineering, Yazd Branch, Islamic Azad University, Yazd, Iran
author
text
article
2019
eng
In this work, the specimen of the fabrics (polyester/ viscose blend) was first placed under microwave irradiation at different times, and then the optimum treatment of treated fabrics (8 min) was selected for investigating physical properties and surface morphology. Graphene oxide (GO) and carbon nanotube (CNT) with different percentages were measured using dispersing agent, washing performance and wash stability, and physical properties of the fabric. Surface morphology of the specimens was also photographed by SEM electron microscopy. Finally, the conductivity properties of the specimens were measured according to AATCC 2005-76 standards, and analyzed by K/S, R%, and Lab specimens and the changes were obtained from the experiments using reflection spectrophotometer analysis. The optimum electrical conductivity was found for viscose polyester fabric containing 9% nanoparticles, and more interestingly, the electrical resistivity for the values of 7 and 5% of CNT were approximately the same as those of 9 and 7% of GO.
Journal of Textiles and Polymers
ITAST (Iranian Textile Association of Science and Technology)
2322-5203
7
v.
2
no.
2019
13
24
http://www.itast.ir/article_92113_2a62b5c20b0ad597344b07a7b7d63152.pdf
Design of Dye Adsorption by Amine Terminated Dendritic Functionalized Halloysite Nanotubes Using Response Surface Methodology (RSM)
Farnaz
Shahamati Fard
Department of Textile Engineering, Amirkabir University of Technology, Tehran, Iran.
author
Somaye
Akbari
Department of Textile Engineering, Amirkabir University of Technology, Tehran, Iran.
author
Elmira
Pajootan
Department of Textile Engineering, Amirkabir University of Technology, Tehran, Iran.
author
Mokhtar
Arami
Department of Textile Engineering, Amirkabir University of Technology, Tehran, Iran.
author
text
article
2019
eng
In this study, the adsorption performance of a modified halloysite for the removal of anionic dye (C.I. Acid Blue 92) was demonstrated. Halloysite was modified in a multistep process by the synthesis of amine terminated dendritic structures on its surface. The transmission electron microscopy images were used to characterize the nanotubes forms of pristine halloysite. The adsorption processes were performed using classical and statistical response surface methodology (RSM) techniques. The effect of important parameters such as pH, adsorbent concentration, and dye dosage was investigated. The results showed that all the independent factors except time were significant to the dye removal efficiency. The dye removal at equilibrium time was well fitted to the Langmuir isotherm model and followed the monolayer adsorption style. The adsorption rate was also described by the pseudo-second-order kinetic model. The adsorption process revealed an exothermic behavior according to the thermodynamic investigations. The removal efficiency of AB92 improved significantly from 8% to 97% after modification.
Journal of Textiles and Polymers
ITAST (Iranian Textile Association of Science and Technology)
2322-5203
7
v.
2
no.
2019
25
36
http://www.itast.ir/article_92114_1f47bceb03b3ea2922f41cce8ad21386.pdf
Comprehensive Comparison Between Mechanical Properties of Nanofiber Matrix and Single Nanofibers
Fatemeh
Jahanmard-Hosseinabadi
Department of Textile Engineering, Amirkabir University of Technology, Tehran, Iran.
author
Mohammad
Amani-Tehrani
Department of Textile Engineering, Amirkabir University of Technology, Tehran, Iran.
author
text
article
2019
eng
The development of electrospun nanofibers for using in different applications requires a comprehensive understanding of the mechanical properties of a single nanofiber and nanofiber layer. Here, we studied the mechanical properties of nanofiber layer and single nanofiber of polycaprolactone (PCL)/functionalized multiwall carbon nanotubes (F-MWCNTs) composite structures. Scanning electron microscopy (SEM) showed morphology and diameter of composite nanofibers with various CNT concentrations. Moreover, the tensile testing was used for measuring mechanical properties of both nanofiber layer and single nanofibers by distinct procedures. Our results clearly showed that the mechanical properties of single nanofibers had a significant difference with those of nanofiber layer. By increasing the F-MWCNT concentration up to 3 wt%, Young’s modulus and tensile strength of the nanofiber layer increased. However, Young’s modulus and tensile strength of single nanofiber increased with addition of F-MWCNTs up to 1 wt% and further increase in concentration led to a decrease in the modulus and tensile strength of single nanofiber.Moreover, the toughness and elongation-at-break of the nanofiber layer and single nanofiber showed different trends. Taken together, considering the mechanical properties of nanofibers in different scales, help us to design an appropriate structures for various applications.
Journal of Textiles and Polymers
ITAST (Iranian Textile Association of Science and Technology)
2322-5203
7
v.
2
no.
2019
37
46
http://www.itast.ir/article_92115_990852de52dc7f19af34661a3dbc71e0.pdf
Poly(lactic acid) (PLA) Nanofibers for Bone Tissue Engineering
Farnaz-sadat
Fattahi
Department of Textile Engineering, Isfahan University of Technology, Isfahan 84156-8311, Iran.
author
Akbar
Khoddami
Department of Textile Engineering, Isfahan University of Technology, Isfahan 84156-8311, Iran.
author
Ozan
Avinc
Department of Textile Engineering, Pamukkale University, 20160, Denizli, Turkey.
author
text
article
2019
eng
Bone tissue engineering is the most promising therapeutic method to alleviate the fast-growing request for bone grafts in nonunion bone defects. It is founded on the use of implanted autologous cells or induced stem cells to form bone tissues on naturally derived or synthetic scaffolds. Nanofibers are being increasingly implemented in bone tissue engineering field as scaffolding materials to regenerate new bone tissues owing to their high surface area-to-volume ratio, high porosity with an interconnected pore structure and the suitable surface structure for cell attachment, proliferation, and differentiation. PLA biopolymer has captured the most attention and interest as a bone tissue engineering material since PLA is easily processable and degrades and disintegrates into natural metabolites while its degradation rate matches with the healing time of damaged human bone tissues. So, the potential of using PLA nanofibers in bone tissue engineering is a serious goal for scientists in novel investigations. This review gives detailed information about the recent developments and applications of PLA nanofibers as scaffolds for bone tissue regeneration.
Journal of Textiles and Polymers
ITAST (Iranian Textile Association of Science and Technology)
2322-5203
7
v.
2
no.
2019
47
64
http://www.itast.ir/article_92116_e18b70b4f42b09372efa33ef3c107e6c.pdf
Quaternary Ammonium Salts of Poly(N,N-dimethylaminoethyl methacrylate) as an Efficient Antibacterial Agent for Polylactide Textiles
Dawid
Stawski
Department of Material and Commodity Sciences and Textile Metrology, Lodz University of Technology, Zeromskiego 116, 90-924 Lodz, Poland.
author
Dorota
Zielińska
Institute of Security Technologies “MORATEX”, M. Sklodowskiej-Curie Street 3, 90-505 Lodz, Poland.
author
text
article
2019
eng
Polylactide nonwoven was modified by poly(N,Ndimethylaminoethyl methacrylate). The surface was quaternizated with crosslinking. A two-step method was used: first spraying the polymer, then cross-linking with ethylene bromide. The modification was confirmed by infrared spectroscopy and solubility tests. The antibacterial activity of unmodified nonwoven, nonwoven with a deposited layer of PDMAEMA and nonwoven quaternized with PDMAEMA was evaluated against Escherichia coli and Staphylococcus aureus. The antibacterial results showed that these materials could achieve up to 100% efficiency.
Journal of Textiles and Polymers
ITAST (Iranian Textile Association of Science and Technology)
2322-5203
7
v.
2
no.
2019
65
72
http://www.itast.ir/article_92117_c072ce05cedc09cc940785dc67d34171.pdf
Online Control System Design for Selvedge Waste Length in Rapier Weaving Loom
Vajiha
Mozafary
Textile Engineering Department, Yazd University, Yazd, Iran.
author
Pedram
Payvandy
Textile Engineering Department, Yazd University, Yazd, Iran.
author
text
article
2019
eng
Controlling the selvedge waste length in shuttle-less weaving loom has great importance in the cost of production. In this study, an online control system is designed and implemented in a weaving loom. First, a high-speed camera records selvedge formation in several successive cycles with different weft yarn tensions. Then the length of weft yarn waste is measured by three methods based on image processing, namely Kalman filter, K-means method and background subtraction. The performances of three methods in terms of accuracy and processing time are evaluated and compared with each other. The results show that Kalman filter method has higher accuracy and it requires lower processing time. In addition, it shows that the results obtained from two other methods are very close to the actual result. There is an inverse relationship between weft yarn tension and selvedge waste length. By increasing the yarn tension, waste length is decreased. Therefore, based on the online measurement of selvedge waste length, the waste length can be measured in each cycle and adjusted by changing the weft yarn tension. So the proposed system has satisfactory performance in online control of weft yarn waste.
Journal of Textiles and Polymers
ITAST (Iranian Textile Association of Science and Technology)
2322-5203
7
v.
2
no.
2019
73
80
http://www.itast.ir/article_92118_7229d715eda4534871e94d94c8cdc2b1.pdf