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Journal articles on the topic 'Electrospininig'

Author: Grafiati
Published: 28 June 2021
Last updated: 13 February 2022

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1

Lu, Shen-Zhou, Xiao-Ping Zhang, Juan Wang, Tie-Ling Xing, and Jian Jin. "Effect of degumming ph value on electrospining of silk fibroin." Thermal Science 18, no. 5 (2014): 1703–4. http://dx.doi.org/10.2298/tsci1405703l.

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Regenerated silk fibroin fibers show properties dependent on the molecular weight of fibroin. The cocoon-degumming approaches had great impact on the degradation of silk fibroin. The effect of degumming pH value to electrospining of fibroin was studied in this paper. The viscosity and molecular weight of regenerated silk fibroin were studied using rheometer and gel electrophoresis. The results showed that the weaker the alkalinity of degumming reagent, there was the milder the effect on silk fibroin molecular. The fibroin fibers can be prepared by electrospining with low concentration of regenerated silk fibroin solution.
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2

Chu, Yun Yun, and Yu Chou Chao. "Fabricate Dye-Sensitized Solar Cell with Electrospining." Advanced Materials Research 335-336 (September 2011): 1117–20. http://dx.doi.org/10.4028/www.scientific.net/amr.335-336.1117.

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Dye adsorption on Ti02and electron transport in Ti02film are the two critical factors in determining efficiency of the the dye sensitized solar cell (DSSC). Increasing dye adsorption which increases the light harvesting is usually achieved by using nanoporous or nanoparticle Ti02films. Electron transport is determined by the inter-particle resistance of Ti02film. Electrospinning is a viable method for forming porous structure materials with high surface area. In this study, it was found that electrospinning is able to achieve good solar cell performance due to the high electron transport caused by the pores in the Ti02film.
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3

Yermagambet, B. T., M. K. Kazankapova, A. T. Nauryzbaeva, Z. A. Mansurov, G. T. Smagulova, and B. B. Kaidar. "PRODUCTION OF CARBON FIBERS BY ELECTROSPINING METHOD." NEWS of National Academy of Sciences of the Republic of Kazakhstan 4, no. 436 (August 15, 2019): 86–94. http://dx.doi.org/10.32014/2019.2518-170x.101.

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4

Liu, Yang, Jie Li, and Zhi Juan Pan. "Effect of Wet Post-Drawn on Structures and Properties of PA6/MWNTs Nanofiber Filaments." Advanced Materials Research 175-176 (January 2011): 90–94. http://dx.doi.org/10.4028/www.scientific.net/amr.175-176.90.

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Electrospining technique is one of the hotest topics all over the world. The main form of the electrospun products is generally nonwoven fiber web with the poor mechanical properties. Consecutive PA6/MWNTs nanofiber filaments were successfully fabricated by an improved electrospining method. Peregal O was used as the bath to post-draw the as-spun filaments and the effects of draw ratio on their structures and properties were studied. The results show that with the increase of the draw ratio, the diameters of filament and fiber decrease; while the degree of orientation arrangement and crystallinity of the fibers is obviously improved and the breaking strength and initial modulus of the filaments increase. As the maximum draw ratio reaches 1.7, the breaking strength and initial modulus of the filament are 2.64 times and 4.2 times as compared to those of the control sample respectively.
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5

Teng, Yu, Jinliang Zhang, Yingjuan Li, Chuanxiong Cai, and Fuliang Chen. "Preparation of Fe3O4 @ CaP magnetic fiber scaffold with electrospining." IOP Conference Series: Earth and Environmental Science 692, no. 2 (March 1, 2021): 022012. http://dx.doi.org/10.1088/1755-1315/692/2/022012.

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6

Jiang, Guo Jun, Wen Min Zhao, and Xiao Hong Qin. "Composite Nanofibers Containing Microparticles Produced via a Stepped Pyramid-Shaped Spinneret." Advanced Materials Research 893 (February 2014): 149–52. http://dx.doi.org/10.4028/www.scientific.net/amr.893.149.

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A novel free surface electrospining via a stepped pyramid-shaped spinneret was used to prepare composite nanofibers containing microparticles. We investigate the spinnability of Polyacrylonitrile (PAN) solution containing graphite powder microparticles. The influence of microparticle on fiber diameter has been studied. This method can be used to produce composite nanofibers containing microparticles structures by electrospinning in mass scale.
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7

Chu, Yun Yun, and Yu Chou Chao. "Preparation of Photoanode of Dye-Sensitized Solar Cell by Electrospining." Advanced Materials Research 627 (December 2012): 896–99. http://dx.doi.org/10.4028/www.scientific.net/amr.627.896.

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The dye-ability and electron transport property of TiO2 film are the two critical factors in determining efficiency of the the dye sensitized solar cell (DSSC). Increasing dye adsorption which increases the light harvesting is usually achieved by using nanoporous or nanoparticle TiO2 films. Electron transport is determined by the inter-particle resistance of TiO2 film. Electrospinning is a viable method for forming porous structure materials with high surface area and less immersing time. In this study, it was found that electrospinning is able to achieve good solar cell performance due to the high electron transport caused by the nano-pores in the TiO2 film.
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8

El-Newehy, Mohamed H., Mehrez E. El-Naggar, Saleh Alotaiby, Hany El-Hamshary, Meera Moydeen, and Salem Al-Deyab. "Green Electrospining of Hydroxypropyl Cellulose Nanofibres for Drug Delivery Applications." Journal of Nanoscience and Nanotechnology 18, no. 2 (February 1, 2018): 805–14. http://dx.doi.org/10.1166/jnn.2018.13852.

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9

Liao, Sheng-Hui, Shi-Yu Lu, Shu-Juan Bao, Ya-Nan Yu, and Min-Qiang Wang. "NiMoO4 nanofibres designed by electrospining technique for glucose electrocatalytic oxidation." Analytica Chimica Acta 905 (January 2016): 72–78. http://dx.doi.org/10.1016/j.aca.2015.12.017.

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10

Xia, Su, Zheng Wang, Jing Quan Yang, Li Mei Hao, and Jin Hui Wu. "Preparation and Characterization of Antibacterial Electrospun Polyurethane Fibers Containing TiO2-Ag Nanoparticles." Advanced Materials Research 79-82 (August 2009): 667–70. http://dx.doi.org/10.4028/www.scientific.net/amr.79-82.667.

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A novel antibacterial material was prepared by electrospining polyurethane (PU) containing TiO2-Ag nanoparticles in this study. The average diameter of PU electrospun nanofibers decreased with increasing concentration of TiO2-Ag.These nanofibers membrane showed high antibacterial activities against Staphylococcus aureus and Escherichia coli, respectively. The mixed mode of PU electrospun fibers and TiO2-Ag nanoparticles was a physical form. The addition of TiO2-Ag did not affect the mechanical property of the mat much.
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11

Chandradass, J., Hern Kim, and Francis W. Y. Momade. "Synthesis of ultrafine MgFe2O4 nanofibers via electrospining using sol–gel precursor." Journal of Sol-Gel Science and Technology 65, no. 2 (November 29, 2012): 189–94. http://dx.doi.org/10.1007/s10971-012-2923-3.

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12

Cheng, Yongliang, Wenzhi Huang, Yanfei Zhang, Ling Zhu, Yangjia Liu, Xizhi Fan, and Xueqiang Cao. "Preparation of TiO2 hollow nanofibers by electrospining combined with sol–gel process." CrystEngComm 12, no. 7 (2010): 2256. http://dx.doi.org/10.1039/b922564a.

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13

Liu, Yang, Jie Li, and Zhi Juan Pan. "The Dispersion of CNT and the Conductive Property of PA6/MWNTs Nanofiber Filaments by Electrospinning." Advanced Materials Research 295-297 (July 2011): 1993–97. http://dx.doi.org/10.4028/www.scientific.net/amr.295-297.1993.

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Consecutive PA6/MWNTs nanofiber filaments were successfully fabricated by an improved electrospining method in this paper. The microstructure and the arrangement of MWNTs in the nanofibers both with the conductivities of the filaments in different MWNTs contents were studied. The results show that the orientation arrangement of the nanofiber and MWNTs in the fibers were both fine at different MWNTs contents .Besides, with the increase of the MWNTs contents, the diameters of the nanofiber increased, while the conductivity of the filaments increased and MWNTs became gathered in the fibers.
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14

Li, Yan, Harshit Porwal, Zhaohui Huang, Han Zhang, Emiliano Bilotti, and Ton Peijs. "Enhanced Thermal and Electrical Properties of Polystyrene-Graphene Nanofibers via Electrospinning." Journal of Nanomaterials 2016 (2016): 1–8. http://dx.doi.org/10.1155/2016/4624976.

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Polystyrene- (PS-) graphene nanoplatelets (GNP) (0.1, 1, and 10 wt.%) nanofibers were successfully produced via electrospining of dimethyformamide- (DMF-) stabilized GNP and PS solutions. Morphological analysis of the composite nanofibers confirmed uniform fiber formation and good GNP dispersion/distribution within the PS matrix. The good physical properties of GNP produced by liquid exfoliation were transferred to the PS nanofibers. GNP modified PS nanofibers showed a 6-fold increase in the thermal conductivity and an increase of 7-8 orders of magnitude in electrical conductivity of the nanofibers at 10 wt.% GNP loading.
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15

Pescador-Rojas, José Alfredo, José Luis Jiménez-Pérez, José Francisco Sánchez-Ramírez, Rubén Gutiérrez-Fuentes, Zormy Nacary Correa-Pacheco, José Paz Zúñiga-Zarco, and Leonardo Duncan Orozco-Flores. "Synthesis of Electrospun Titania Nanofibers for Thermal Lens Study in Heat Transport Applications." Materials Science Forum 936 (October 2018): 58–62. http://dx.doi.org/10.4028/www.scientific.net/msf.936.58.

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Thermal lens spectrometry (TLS) technique was used to obtain the thermal diffusivity of electrospun Titania nanofibers (TiO2), with average diameter size of 50-80 nm, in water. TiO2nanofibers have been successfully prepared by sol-gel and electrospining techniques. TLS provides reliable alternative to measure the thermal diffusivities of semitransparent materials and low thermal diffusivities. The results show that the nanofluid thermal diffusivity increases with the presence of nanofibers. Complementary techniques: scanning electron microscopy (SEM) and X-ray energy dispersive spectroscopy (EDS) were employed to characterize the nanofibers morphology, average fiber diameter and chemical composition, respectively.
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16

Khadem, Dariush Jafar, Zahira Yaakob, Samaneh Shahgaldi, Mostafa Ghasemi, and Wan Ramli Wan Daud. "Synthesis and Characterization of PES/TiO2 Nanofibers Membrane." Defect and Diffusion Forum 312-315 (April 2011): 613–19. http://dx.doi.org/10.4028/www.scientific.net/ddf.312-315.613.

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An important recent discovery in the membrane science is the polymeric nanofiber membrane. Membranes have many applications in protein purification, wastewater treatment and fuel cells. One of the versatile technique with the ability of producing cost-effective, highly porous non-woven membranes with large surface area is electrospining. In this study the effect of TiO2 nanoparticles in membrane performance has been investigated. A PES/TiO2 nanofibers membrane has higher flux and permeability than a pristine PES membrane. Also the measurments show that the surface area of the membrane will increase by addition of TiO2 nanoparticles. Moreover, the contact angle was investigated.
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17

Zamani, Reza, Sedigheh Aval, Younes Pilehvar-Soltanahmadi, Kazem Nejati-Koshki, and Nosratollah Zarghami. "Recent Advances in Cell Electrospining of Natural and Synthetic Nanofibers for Regenerative Medicine." Drug Research 68, no. 08 (January 22, 2018): 425–35. http://dx.doi.org/10.1055/s-0043-125314.

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AbstractThe progression of nanotechnology provides opportunities to manipulate synthetic and natural materials to mimic the natural structure for tissue engineering applications. The electrospinning technique applies electrostatic principle to fabricate electrospun nanofibers. Nanofiber scaffolds are precisely similar to the native extracellular matrix (ECM) and support cell proliferation, adhesion, tendency to preserve their phenotypic shape and directed growth according to the nanofiber direction. This study reviewed both the natural and synthetic type of nanofibers and described the different properties used to trigger certain process in the tissue development. Also, the potential applications of electrospun scaffolds for regenerative medicine were summarized.
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18

Hingwe, V. S., K. A. Koparkar, N. S. Bajaj, and S. K. Omanwar. "Optical properties of one dimensional hybrid PVA/YVO4:Eu3+ nanofibers synthesized by electrospining." Optik 140 (July 2017): 211–15. http://dx.doi.org/10.1016/j.ijleo.2017.04.047.

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19

Liu, Yuanyuan, Junwen Sun, Yu Wang, Shaorong Xie, Huayan Pu, Yan Peng, and Liming Xin. "Drug-Loaded Vascular Scaffold Fabricated by Coaxial Electrospining and Electro-Hydro-Dynamic Direct-Writing." Journal of Biomaterials and Tissue Engineering 8, no. 5 (May 1, 2018): 665–70. http://dx.doi.org/10.1166/jbt.2018.1798.

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20

Supriyanto, Abdul, Minarti Liana Murni, Fitri Marlina, and Dwi Pangga. "Uji Biokompatibilitas Nanofiber Komposit Kitosan/PVA Sebagai Pembalut Luka." Lensa : Jurnal Kependidikan Fisika 6, no. 1 (June 30, 2018): 37. http://dx.doi.org/10.33394/j-lkf.v6i1.934.

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[Title: Chitosan/PVA Composite Nanofiber Biocompatibility Test as a Wound Wrap]. This study aims to make chitosan-based nanofiber from NTB local crab shells. The manufacture of nonofiber is intended for application in the medical world as wound dressing. Wound dressing was developed from the basic ingredients of chitosan from NTB local crab shells. This research was conducted using the electrospining method, namely by making fibers from nano-sized chitosan. The resulting wound dressing was analyzed using FTIR. The results of this analysis show that chitosan has an area of absorption or transmittance in some chitosan groups so that it shows a positive alloy on chitosan and PVA as antibacterial in wound dressing.
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21

Enomoto, Yuji, and Ick Soo Kim. "Mechanical Properties Evaluation of Nanofiber/Webs." Key Engineering Materials 464 (January 2011): 20–23. http://dx.doi.org/10.4028/www.scientific.net/kem.464.20.

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Recently ultrafine fibers of nanometer size and their fabrics are growingly interested not only in textile industry but also in non-textile industry, as they have excellent properties of lightness, high strength, comfort, function and etc as compared to those of conventional fibers. Evaluation of the mechanical properties is, then, important in connection with the reliability and durability of the products. Since commercialized machines are not always conventionally designed for mechanical property evaluation of nanofiber in any environments; air or fluids. We have, therefore, conducted to develop versatile testers including tension tester for strength measurement and friction tester for handle measurement. In this note, we present typical results for evaluation of mechanical properties of nanofiber/ web fabricated by means of an electrospining method.
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22

Zhang, Xiao Xue, Jun Sun, Jian Jun Wang, and Li Xing Dai. "Preparation and Characterization of pH-Responsive Poly(Vinyl-Alcohol)/Sodium Carboxymethylcellulose Nanofibers." Advanced Materials Research 796 (September 2013): 132–35. http://dx.doi.org/10.4028/www.scientific.net/amr.796.132.

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pH-sensitivity nanofibers composited of poly (vinyl alcohol) (PVA) and sodium carboxymethylcellulose (Na-CMC) were prepared by electrospining. The structure, properties, and morphology of the nanofibers were investigated by Fourier transform infrared spectroscopy (FTIR), X-ray differential (XRD), scanning electron microscopy (SEM) and pH-sensitivity testing. It was found that the reswelling of the nanofibers was pH-responsive and relied on the content of Na-CMC. FTIR spectroscopy of the nanofibers confirmed that hydrogen bonds were formed between PVA and Na-CMC which may cause the stable increase of pH-sensitivity. XRD peaks gradually weakened and broadened with the increase of Na-CMC content, indicating the decrease of crystallinity. Besides, the morphology of the PVA/ Na-CMC nanofibers was affected by the content of Na-CMC.
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23

Liang, Haiou, Jie Bai, Tong Xu, and Chunping Li. "Enhancing photocatalytic performance of heterostructure MoS2/g-C3N4 embeded in PAN frameworks by electrospining process." Materials Science in Semiconductor Processing 121 (January 2021): 105414. http://dx.doi.org/10.1016/j.mssp.2020.105414.

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24

Tong, Haixia, Xican Tao, Daoxin Wu, Xiongfei Zhang, Dan Li, and Ling Zhang. "Preparation and characterization of doped TiO2 nanofibers by coaxial electrospining combined with sol–gel process." Journal of Alloys and Compounds 586 (February 2014): 274–78. http://dx.doi.org/10.1016/j.jallcom.2013.09.177.

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25

Shahgaldi, Samaneh, Zahira Yaakob, Mostafa Ghasemi, Wan Ramli Wan Daud, and Dariush Jafar Khadem. "Investigation of the Effect of Electrospun Polyethersulfone Nanofibers in Membrane." Defect and Diffusion Forum 312-315 (April 2011): 607–12. http://dx.doi.org/10.4028/www.scientific.net/ddf.312-315.607.

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One dimensional (1D) nanostructure materials such as nanowires, nanofibers, and nanorods with porous structures have potential for use in various applications. Electrospinning is one of the versatile techniques with the ability of producing cost-effective, large production, highly porous nanofibers and membrane with large surface to volume ratios. Poly ether sulfone (PES) is a kind of special engineering plastic with good processing characteristics. In this paper, synthesis of PES membrane was investigated by two main methods, i.e. phase inversion and electrospiing. For electrospining, the main effective parameters such as concentration of polymer and solvent, for finding the optimized condition of electrospun PES membrane was studied. The produced membranes were characterized by SEM for morphology and BET observation of surface area, permeability, flux, and mechanical propertise for different applications.
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26

El-Sayed, Hosam, Claudia Vineis, Alessio Varesano, Salwa Mowafi, Riccardo Andrea Carletto, Cinzia Tonetti, and Marwa Abou Taleb. "A critique on multi-jet electrospinning: State of the art and future outlook." Nanotechnology Reviews 8, no. 1 (November 12, 2019): 236–45. http://dx.doi.org/10.1515/ntrev-2019-0022.

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Abstract This review is devoted to discuss the unique characteristics of multi-jet electrospinning technique, compared to other spinning techniques, and its utilization in spinning of natural as well as synthetic polymers. The advantages and inadequacies of the current commercial chemical spinning methods; namely wet spinning, melt spinning, dry spinning, and electrospinning are discussed. The unconventional applications of electrospinning in textile and non-textile sectors are reported. Special emphasis is devoted to the theory and technology of the multijet electrospinning as well as its applications. The current status of multi-jet electrospining and future prospects are outlined. Using multi-jet electrospinning technique, various polymers have been electrospun into uniform blend nanofibrous mats with good dispersibility. In addition to the principle of multi-jet electro electrospinning, the different devices used for this technique are also highlighted.
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27

Cao, Yan Juan, Bin Jie Xin, Xiang Ji Wu, and Wei Ping Du. "Research on Progress and Possibility of Electrospining of Native Cellulose and Preparation of Copper-Based Antimicrobial Fiber." Advanced Materials Research 850-851 (December 2013): 53–56. http://dx.doi.org/10.4028/www.scientific.net/amr.850-851.53.

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Electrostatic spinning is now recognized as a versatile and easily feasible method for the preparation of micro and nanofibrous materials. Because of their high specific surface area and highly porous structure electrospun materials can find application as wound dressings that provide good draining and good air permeability [. By adding various types of material or chemical modification in electrospun materials, we can prepare a polymer with excellent antibacterial properties of nanomaterials. Copper, an inorganic antibacterial agent, is also called the second silver. The antibacterial research of copper series attracted great concern in recent years. First, the paper introduced the progress and mechanism of electrostatic spinning of native cellulose and Cu (II) ion antimicrobial fibres, and then did a brief presentation of copper ion antibacterial fibers on the bases of electrostatic spinning of native cellulose.
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28

Ravandi, Seyed Abdolkarim Hosseini, Razieh Hashemi Sanatgar, and Farzad Dabirian. "Wicking Phenomenon in Nanofiber-Coated Filament Yarns." Journal of Engineered Fibers and Fabrics 8, no. 3 (September 2013): 155892501300800. http://dx.doi.org/10.1177/155892501300800302.

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Wicking phenomenon has been investigated in filaments and spun yarns in different studies. In comparison with conventional structures, nanofibrous structures have unique characteristics such as higher surface-to-volume ratios, smaller pores, and higher porosity. For many nanofiber applications, a good understanding of the liquid absorption and wettability of nanofibrous is crucial. In this article, a modified electrospinning process for yarn coating with nanofiber is presented. In this method, fiber direction was controlled by manipulating the conventional system of electrospining and embedded nanofibers on yarn surface. Nylon66 filament was coated with nylon 66 nanofiber. The coating morphology and capillary phenomenon were examined in different concentrations of polymer solution. The kinetics of capillary flow of colored liquid in coated yarns with nanofiber follows the Lucas-Washburn equation. Results show that coating with nanofibers increases equilibrium wicking height. In a nanofiber coating process, with a constant feeding rate, increasing the solution concentration increases the capillary rise rate.
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29

Son, Young Ju, Wei Mao, Shinwook Kang, Kyeongsoon Kim, Hunhee Kang, Yoora Kim, and Hyuk Sang Yoo. "Electrospining of Nanofibrous Meshes Composed of Hypromellose and Poly(vinyl alcohol) for One-Day Release of Cationic Peptide." Journal of Nanoscience and Nanotechnology 19, no. 12 (December 1, 2019): 7920–25. http://dx.doi.org/10.1166/jnn.2019.16860.

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30

Liu, Zong Hsin, Li Wei Lin, Cheng Teng Pan, and Zong Yu Ou. "Pre-Strained Piezoelectric PVDF Nanofiber Array Fabricated by Near-Field Electrospining on Cylindrical Process for Flexible Energy Conversion." Advanced Materials Research 566 (September 2012): 462–65. http://dx.doi.org/10.4028/www.scientific.net/amr.566.462.

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In this study, near-field electrospining on hollow cylindrical (NFES) process was used to fabricate permanent piezoelectricity of polyvinylidene fluoride (PVDF) piezoelectric nanofibers. With in situ electric poling, mechanical stretching and heating during NFES process, the pre-strained piezoelectric PVDF nanofibers with high stretchability and energy conversion efficiency can be applied at low-frequency ambient vibration to convert mechanical energies into electrical signals. By adjusting rotating velocity of the hollow cylindrical glass tube on X-Y stage, electric field, baking temperature and carbon nanotube (CNT) concentration in PVDF solution, the crystalline of β phase, polarization intensity and morphology of piezoelectric fiber can be controlled. XRD (X-ray diffraction) observation of PVDF fibers was characterized. With electric field 0.5×107 V/m (needle-to-tube distance 2 mm and DC voltage 5 kV), rotating velocity 400 r.p.m, baking temperature 80 °C and 0.03 wt% CNT in NFES process, it reveals a high diffraction peak at 2θ=20.8° of piezoelectric crystal β-phase structure. Then the array nanofibers were transferred onto a parallel copper electrode by using flexible insulation epoxy/PI film to provide packaging protection. When the sensor was tested under 5 Hz vibration frequency, the maximum induced voltage was 29.4 mVp-p.
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31

Dou, Hao, Zhi Jin Yu, and Bao Qi Zuo. "Structure and Antibacterial Activity of Silk Fibroin/chitosan Nanofibrous Mats Using an Electrospinning Technique." Advanced Materials Research 332-334 (September 2011): 967–72. http://dx.doi.org/10.4028/www.scientific.net/amr.332-334.967.

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More and more attention has been paid to natural materials. This paper was carried out with an intention to investigate the effect of electrospun silk fibroin (SF) nanofibrous mats by mixing different weight raito of chitosan (CS) in the same solvent-formic acid. Based on good electrospining feasibility, it was found that the average diameter of spun fibers became fine from 337nm to 103nm, with the concentration of CS in the blend compositions increasing to 4%.At the same time, the conformational transition of SF nanofibers adding CS occured to the tendence towards β-sheet structure by means of the analysis of the Fourier transform infrared spectroscopy (FTIR), Wide angle X-ray diffraction (WAXD) and Differential thermal analysis (TGA).What was more, excellent antibacterial activity(a degree growth inhibition of more than 95%) of the promising nanofibrous mats was revealed, through utilizing the colony counting method against Gram-positive bacteria S. aureus and Gram-negative bacteria E.coli ,which would open up wide applications on would dressing, filtration and environmental purification.
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32

Salehifar, Nahideh, and Alireza Nikfarjam. "Improvement and Red Shift Toward Visible Spectrum of TiO2 Nanofibers through Doping by Fe2O3 and Nitrogen." Advanced Materials Research 829 (November 2013): 717–21. http://dx.doi.org/10.4028/www.scientific.net/amr.829.717.

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TiO2has many applications as photocatalyst, photo/electrochromic device, solar cell and sensors. It has been activated only by UV light. In this research we have been investigated on the effect of adding Fe2O3nanoparticles and N on the absorption spectrum in order to increase their activity and shift toward visible light for TiO2nanofibers. We used electrospining method to fabricate nanofibers. Sol gel for spinning pure nanofibers contains Titanium tetraisopropoxide (C12H28O4Ti), acetic acid (CH3COOH), ethanol (C2H5OH) and PVP (C6H9NO-12 wt.% ). Then we used Fe2O3nanoparticle (size: 2040 nm, purity: 98%) and HNO3acid for doping. Among Fe2O3-doped samples, the 2.1 wt% Fe2O3indicated the highest activity for visible light, while with HNO3, excellent photo-catalyst activity obtained at 1.5wt% Fe2O3and 5 wt% HNO3(purity :65%). The final solutions were stacked into the syringe and joined to a high voltage DC supply. A piece of glass stacked on aluminum foilwas used as collector. Finally nanofibers calcined at 500°C. FESEM, XRD and Spectrophotometry techniques were employed to deliberation nanofibers. Diameter of the fibers was approximately 100 nm (anatase: 77%). The Fe2O3-TiO2and Fe2O3-N-TiO2nanofibers indicated respectively 50% and 80% growth in absorption intensities under visible light irradiation compared to pure nanofiber and absorption spectrum peak moved towards larger wavelengths (70 and 100nm) when TiO2doped with Fe2O3and Fe2O3-N. Keywords:Fe2O3nanoparticle; nitrogen; red shift; TiO2nanofiber; UV-visible irradiation.
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33

Pisesweerayos, Prasit, Somsak Dangtip, Pitt Supaphol, and Toemsak Srikhirin. "Electrically Conductive Ultrafine Fibers of PVA-PEDOT/PSS and PVA-AgNPs by Means of Electrospinning." Advanced Materials Research 1033-1034 (October 2014): 1024–35. http://dx.doi.org/10.4028/www.scientific.net/amr.1033-1034.1024.

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This research project produced two fabricated ultrafine conductive polymeric fibers. The first fiber was fabricated from a polymer and conductive polymer solution, and the second was fabricated from a polymer and metal nanoparticle/ nanocomposite. The resulting fibers were characterized and analyzed. For all fiber samples, the ultrafine polymeric fibers were fabricated using polyvinyl alcohol (PVA). The conductive polymer used in the first fiber sample was poly (3,4-ethylenedioxythiophene)/ polystyrene sulfonate (PEDOT/PSS). The conductive nanoparticles used in the second fiber sample were silver nanoparticles (AgNPs). The ultrafine conductive polymer fibers and the ultrafine conductive nanoparticle fibers were fabricated using an electrospining process. During the fabrication process of each fiber sample, different concentrations of either PEDOT/PSS, for fiber sample one, or AgNPs, for fiber sample two, were combined in PVA solution. Using optimal conditions, ultrafine fibers were fabricated at intervals of 5 min for the creation of random fibers, and intervals of 20 min for the creation of aligned fiber mats. The resulting fibers ranged from 0.1 μm to 0.2 μm in diameter. After characterization and analysis of the conductive ultrafine polymeric fibers, using either the PVA:PEDOT/PSS compound or the PVA:AgNPs compound, both samples produced greater conductive capacities with greater concentrations of solution. For the random fiber samples, the conductive capacity was sporadic. However, the ultrafine fiber mats (PVA:AgNPs) supported a capacity from 3.64 S/cm to 10.64 S/cm, and the PVA:PEDOT/PSS ultrafine fiber mats supported a capacity from 4.49 S/cm to 7.08 S/cm.
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34

You, Minghui, Qixiang Sun, Shuo Zhang, and Jingsheng Liu. "PS-b-PEG Block Copolymer for the Compatibility of the Electro Spun Fiber of PS/PEG Blend." Current Nanoscience 14, no. 5 (July 23, 2018): 410–15. http://dx.doi.org/10.2174/1573413714666180405141441.

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Background: The electrospining of Poly (styrene)/poly(ethylene glycol) blend and prepared electrospun Poly (styrene)/poly(ethylene glycol) are the composite fibers. The Core-shell structured PS-PEG fibers were founded by polarized optical microscope after electrospinning, meanwhile, the mechanism of structure was also discussed. Methods: The Electro-spinning is a facile method to fabricate polymer fibers. The single-step process to fabricate poly (styrene)(PS)/poly(ethylene glycol)(PEG) polymer nano-fiber meshes had been investigated, respectively. The morphology and crystallization behavior of the blend were observed by polarized optical microscopy. Results: The clear phase separation of PEG encapsulating on the PS fiber surface, and the nano-fiber composed of a core-shell structure, furthermore, the core of PS with the shell of PEG were observed, respectively. To increase the compatibility of the PS/PEG blend, Poly (styrene)(PS)-b-poly(ethylene glycol)(PEG), synthesized via atom transfer radical polymerization (ATRP) was introduced. The addition of the PS-b-PEG block copolymer has no negative effect on the electro-spinning process. Conclusion: When the Block copolymer of PS-b-PEG as a compatibilizer was added into the PS/PEG blend, the homogeneous electrospun fibers without phase separation was obtained. The effect of PS-b-PEG block copolymer on electrospinning of PS/PEG blend was analyzed by evaluating the morphology and crystallization behavior of the electrospun fibers. Under polarized optical microscopy analyses suggest that, it can be found that the phase separation between PS and PEG disappears due to the introduction of the compatibilizer. Meanwhile, the core-shell structure of PEG/PS composite fiber was destroyed and PEG evenly dispersed in PS/PEG blend.
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35

Mariyanats, A., and V. Popov. "ELECTROSPINING OF COLLAGEN MATRIXES: STRUCTURAL STABILIZATION AND MECHANICAL PROPERTIES." BIOTECHNOLOGY: STATE OF THE ART AND PERSPECTIVES, 2020, 88–89. http://dx.doi.org/10.37747/2312-640x-2020-18-88-89.

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The mechanical properties of highly porous collagen matrices made by electrospinning and stabilized with 1,4-butanediol diglycidyl ether (BDDGE) were studied depending on the concentration of BDDGE in the initial composition, the type of solvent and the concentration of BDDGE in the solution for structural stabilization, and the matrices holding time in this solution
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36

"Preparation and Characterization of Flower-Like Li1.2Ni0.17Co0.17Mn0.5O2 Microstructures As Cathode Materials By Electrospining." ECS Meeting Abstracts, 2013. http://dx.doi.org/10.1149/ma2013-02/14/1053.

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37

"Application of Biosystems Engineering to Tissue Engineering - Electrospining Technology to Fabricate Scaffolds for Bioartificial Organs -." Journal of Biosystems Engineering 29, no. 4 (August 1, 2004): 367–74. http://dx.doi.org/10.5307/jbe.2004.29.4.367.

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38

"SynthesisT ofT BiofunctionalizedT NanofibersT (Curcumin,T GelatinT andT FormicT Acid)T usingT ElectrospinningT ProcessT andT OptimizationT ofT ParametersT forT DiameterT ofT Nanofibers." International Journal of Innovative Technology and Exploring Engineering 8, no. 9S3 (August 23, 2019): 222–31. http://dx.doi.org/10.35940/ijitee.i3040.0789s319.

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ElectrospinningT isT aT easyT andT versatileT methodT toT synthesizeT theT NanofibersT ofT differentT PolymersT andT compounds.T TheT mainT meritsT ofT thisT processT areT weT canT getT continuousT andT ultraT thinT fibers.T DueT toT thisT weT canT useT thisT processT forT massT production.T ThisT processT overcomeT soT manyT limitationsT ofT otherT processes. HenceT inT thisT presentT workT manufacturingT ofT fibersT andT optimizationT ofT processT parametersT hasT beenT carriedT out.T ThereT areT nearT aboutT 16T processT parameterT ofT electrospiningT process.T FromT thisT fourT parametersT areT selectedT (distanceT betweenT spinneretT andT drumT collector,T voltage,T flowT rateT andT viscosity).T ThenT characterizationT ofT theseT manufacturedT nanofibersT hasT beenT doneT byT usingT SEM.T ThenT applyingT theT techniqueT ofT DOET andT ANOVAT theT effectT ofT theseT parametersT onT theT diameterT ofT nanofibersT hasT beenT predicted.
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39

Shi, Yong, and Yong Shi. "Energy Harvesting From PZT Nanofibers." MRS Proceedings 1034 (2007). http://dx.doi.org/10.1557/proc-1034-k11-06.

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AbstractIn this paper, we demonstrated that Lead Zirconate Titanate (PZT) nanofibers can be used to harvest energy from dynamic loading and mechanical vibration. PZT nanofibers were fabricated by electrospinning process. SEM image of PZT nanofibers has shown that the average diameter of these fibers is about 150nm, which can be tuned from 50nm to 200 nm by varying the composition and viscosity of the precursor for electrospining. Titanium substrate with ZrO2 layer was used to collect the PZT nanofibers for the demonstration of energy harvesting from dynamic loading. The largest output voltage is 170mV under 0.5% strain; the frequency of the output voltage is the same as that of the input loading. Silicon substrate with trenches was used to collect the nanofibers for energy harvesting from vibration. The output voltage generated from 150Hz sinusoid vibration source has peak voltages of 64.9mV and -95.9mV. These experimental results suggest that PZT nanofibers have great potentials for energy harvesting from environments and being used as nanogenerators. Further study is under the way to optimize the design and improve the efficiency.
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40

Martín, Ane, and ANTONIO VELOSO. "Forma-memoria ehun biobateragarrien sorpena." EKAIA Euskal Herriko Unibertsitateko Zientzia eta Teknologia Aldizkaria, July 19, 2021. http://dx.doi.org/10.1387/ekaia.22876.

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Material berrien ikerketak material adimenduen sorkuntza ekarri du. Material hauek, modu itzulgarrian haien propietate bat edo gehiago aldatzeko gai dira kanpo estimulu baten eraginpean. Talde zabal honen barruan, forma-memoria poliuretanoak daude, zeinak forma-memoria efektua duten. Efektu honen bidez, poliuretanoak berotzean hasierako forma aldatzeko aukera dute; behin forma berrian izanda, hoztuz, forma berrian finkatzen dira; eta azkenik, birberotuz jatorrizko forma berreskuratzeko gaitasuna dute. Lan honetan forma-memoria poliuretanoak (SMPU) sintetizatu dira poli(tetrametilen)glikola, isoforona diisozianatoa eta hexametileno diisozianatoa erabiliz eta, kate-hedatzaile moduan errizino olioa eta 1,4-butanodiola erabiliz. SMPU biobateragarriak lortzeko, sintesian jatorri naturala duen errizino-olioa erabili da. Sintetizatu diren poliuretano guztiak Fourieren transformatu bidezko espektroskopia infragorri (FTIR), analisi dinamiko-mekaniko (DMA) eta analisi termomekaniko (TMA) bidez karakterizatu dira propietate fisiko-kimikoak ezagutzeko. FTIR bidez erreakzioa monorizatu da eta isozianato taldeak guztiz erreakzionatu direla ziurtatzeko erabili da. DMAren bidez beira-trantsizio tenperatura determinatu da, non, poliuretanoaren pisu molekularra txikitzean edo estekiometria balioa igotzean beira-trantsizio tenperatura igotzen dela determinatu da. Azkenik TMA bidez, poliuretano guztiek memoria-forma dutela ziurtatu da. Poliuretanoak aplikazio anitzetan erabil daitezke, hala ere, helburua ehun biobateragarri adimendunak diseinatzea izan da. Ehunak egiteko, sintetizatzen diren polimerotik zuntzak lortu behar dira. Horretarako, zuntzak prestatzeko elektrobiraketa (electrospining) edo estrusio teknikak burutu dira. Azkenik, zuntzak ehotuz ehunak lortu dira modu desberdinetan.
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41

Ziaei Amiri, Fereshteh, Zaiddodine Pashandi, Nasrin Lotfibakhshaiesh, Mohammad Javad Mirzaie Parsa, Hossein Ghanbari, and Reza Faridi-Majidi. "Cell attachment effects of collagen nanoparticles on crosslinked electrospun nanofibers." International Journal of Artificial Organs, August 17, 2020, 039139882094773. http://dx.doi.org/10.1177/0391398820947737.

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Since collagen is naturally a main extracellular matrix protein, it has been applied widely in skin’s tissue engineering scaffolds to mimics the characteristics of extracellular matrix for proper transplantation of living cells. However, there are challenges that come with application of this natural polymer such as high solubility in aqueous environments which requires further consideration such as chemically cross-linking in order to stabilization. But these treatments also affect its functionality and finally cellular behaviors on scaffold. In this research we evaluated the suitability of collagen nanofibers versus collagen nanoparticles for cell adhesion and viability on glutaraldehyde cross-linked scaffolds. Appling a dual-pump electrospining machine a blend PCL-Gelatin from one side and collagen nanofibers or collagen nanoparticles from the other side were collected on the collector. The fabricated scaffolds were characterized by scanning electron microscopy, contact angle, and mechanical analysis. The cell viability, adhesion and morphology were studied respectively using MTT assay, hoechst staining and scanning electron microscopy. The results indicated significantly improvement of cell viability, adhesion and better spreading on scaffolds with collagen nanoparticles than collagen nanofibers. It seems changes in surface morphology, viscoelastic moduli and swelling ability following cross-linking with glutaraldehyde in scaffold with collagen nanoparticles are still favorable for cellular proliferation. Based on these results, in the case of glutaraldehyde cross-linking, application of collagen nanoparticles rather than collagen nanofibers in tissue regeneration scaffolds will better mimic the extracellular matrix characteristics; and preserve the viability and adhesion of seeded cells.
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