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Effect of Sol-gel Coating on Microscopic, Thermal and Water Absorption Behavior of Aramid/Nylon 6/6/Nanodiamond-based Fibers

Ayesha Kausar


In this article, an aramid of 4,4′-(1,3-phenylenedioxy)dianiline and terephthaloyl chloride was prepared. Afterwards, Nylon 6/6 and aramid were used to prepare sol-gel coated and non-coated blend fibers reinforced with nanodiamond (ND). In this way, four types of fibers were fabricated i.e. aramid/Nylon 6/6 fibers (Ar/N66) and aramid/Nylon 6/6/nanodiamond fibers (Ar/N66//ND) and sol-gel coated s-Ar/N66 and s-Ar/N66//ND fibers. The fibers were fabricated via Brabender single screw extruder at 200 °C. The Ar/N66 and Ar/N66//ND fibers were coated by means of simple dip-coating technique. Fourier transform infrared spectroscopy was used for structural characterization. Scanning electron microscopic images of non-coated and sol-gel coated fibers were scanned for morphological comparison. Glass transition temperature of the sol gel s-Ar/N66 fibers increased up to 232 °C, while that of s-Ar/N66//ND was enhanced to 240 °C relative to neat fibers. Moreover, the sol-gel coated s-Ar/N66//ND (8.08%) fibers had higher water absorbing tendency than non-coated Ar/N66//ND (7.66 %).


Aramid; Nylon 6/6; sol-gel; fiber; nanodiamond; water uptake

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Kausar A. Properties of Sol-gel Coated Fibers of Polyamide 6/12/Polyvinylpyrrolidone/Nanodiamond. Int J Mater Chem. 2015, 5, 91-95.

Demircan O, Kosui T, Ashibe S, Nakai A. Effect of Stitch and Biaxial Yarn Types on Tensile, Bending and Impact Properties of Biaxial Weft Knitted Composites. Adv Compos Mater. 2014, 23, 239-260

Zhao X, Hirogaki K, Tabata I, Okubayashi S, Horia T. A new method of producing conductive aramid fibers using supercritical carbon dioxide. Surf Coat Tech. 2006, 201, 628-636

Kausar A. Mechanical thermal and electrical properties of epoxy matrix composites reinforced with polyamide-grafted-MWCNT/poly (azo-pyridine-benzophenone-imide)/polyaniline nanofibers. Int J Polym Mater. 2014, 63, 831-839

Derombise G, Schoors L V V, Davies P. Degradation of Technora aramid fibres in alkaline and neutral environments. Polym Degrad Stab. 2009, 94, 1615-1620

Kausar A. Polyamide-Grafted-Multi-walled Carbon Nanotube Electrosupn Nanofibers/Epoxy Composites. Fibers Polym. 2014, 15, 2564-2571

Song YS, Oh H, Jeong TT, Youn JR. A novel manufacturing method for carbon nanotube/aramid fiber filled hybrid multi-component composites. Adv Compos Mater. 2008, 17, 333-341

Wen J, Wilkes GL. Synthesis and characterization of abrasion resistant coating materials prepared by the sol-gel approach: I. Coatings based on functionalized aliphatic diols and diethylenetriamine. J Inorg Organometal Polym. 1995, 5, 343-375

Kausar A. Composites of Sulfonated Polystyrene-block-Poly(ethylene-ran-butylene)-block- Polystyrene and Graphite-Polyoxometalate: Preparation, Thermal and Electrical Conductivity. Int J Mater Chem 2015, 5, 85-90.

Bandeira LC, Ciuffi KJ, Calefi, PS, Nassar EJ, Salvado IMM, Fernandes MHFV. Low temperature synthesis of bioactive materials. Ceramica. 2011, 57, 166-167

Yang XF, Li QL, Chen ZP, Zhang L, Zhou Y. Mechanism studies of thermolysis process in copolyamide 66 containing triaryl phosphine oxide. J Therm Anal Calorim. 2013, 112, 567-571

Karsli NG, Yilmaz T, Aytac A, Ozkoc G. Investigation of erosive wear behavior and physical properties of SGF and/or calcite reinforced ABS/PA6 composites. Composite Part B. 2013, 44, 385-393

Czegeny Z, Jakab E, Blazso M, Bhaskar T, Sakata Y. Thermal decomposition of polymer mixtures of PVC, PET and ABS containing brominated flame retardant: formation of chlorinated and brominated organic compounds. J Anal Appl Pyrol. 2012, 96, 69-77

Kausar A. Preparation and Characteristics of Mercaptobenzene Functionalized Graphite and Epoxy-based Hybrid Membranes. Am J Mater Sci 2015, 5, 17-21

Kausar A. Nanodiamond/MWCNT-based Polymeric Nanofiber Reinforced Poly(Bisphenol A-co-epichlorohydrin). Malaysian Polym J 2015, 10, 23-32.

Kausar A. Polyaniline Composites with Nanodiamond, Carbon nanotube and Silver Nanoparticle: Preparation and Properties. Am J Polym Sci Engineer 2015, 3, 149-160.

Kausar A, Hussain ST. Poly(azo-ether-imide) nanocomposite films reinforced with nanofibers electrospun from multi-walled carbon nanotube filled poly(azo-ether-imide). J Plast Film Sheet. 2013, 30, 266-283

de Campos BM, Calefi PS, Ciuffi KJ, de Faria EH, Rocha LA, Nassar EJ, Silva JVL, Oliveira MF, Maia IA. Coating of polyamide 12 by sol-gel methodology. J Therm Anal Calorim. 2014, 115, 1029-1035

Ali W, Kausar A, and Iqbal T. Reinforcement of High Performance Polystyrene/ Polyamide/Polythiophene with Multi-walled Carbon Nanotube Obtained through Various Routes. Compos Interfaces. 2015, 22, 885-897

Jördens C, Wietzke S, Scheller M, Koch M. Investigation of the water absorption in polyamide and wood plastic composite by terahertz time-domain spectroscopy. Polym Test. 2010, 29, 209-215

Zhang Q, Li D, Lai D, You Y, Ou B. Preparation, microstructure, mechanical, and thermal properties of in situ polymerized polyimide/organically modified sericite mica composites. Polym Compos. DOI: 2015, 10.1002/pc.23402


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