Electrospun nano fibers

Xiang, P., Li, M., Zhang, C.Y., Chen, D.L., and Zhou, Z.H. (2011) Cytocom-patibility of electrospun nano fiber tubular scaffolds for small diameter tissue engineering blood vessels. Int J. Biol. Macromol, 49 (3), 281—288. 

Sui X, Wiesel E, Wagner HD. Enhanced mechanical properties of electrospun nano-fibers through NaCl mediation. J Nanosci Nanotechnol 2011 11 7931-6. 

FIGURE 8 Comparison between the actual and predicted contact angle of electrospun nano fiber for RSM and ANN model. 

Nafion-112, and Nafion-212, use the thicker membrane Nafion-117 in DMFCs. The use of crosslinked PVA electrospun nano-fiber film supported Nafion composite membranes (Nafion/ PVA-fiber, thickness 50 pm) in DMFCs has been reported to exhibit a much better DMFC performance than Nafion-117 and Nafion/PVA blended PEMs [26-31]. Several researchers blended the Nafion PEMs with low methanol compatible PVA to reduce the methanol crossover in the PEMs [32-35]. However, these modified Nafion membranes had thicknesses greater than 175 pm, which were similar to (or higher than) that of the neat Nafion-117 membrane. Although there was a decrease in the methanol crossover from these Nafion/PVA blended membranes, the proton transfer resistance of these membranes increased, resulting in a lower DMFC performance. The advantage of applying the thin Nafion/PVA-fiber PEMs to the DMFCs is that the methanol crossover can be reduced without increasing the area specific resistance (i.e., Lla) because of low membrane thickness. Table 12.1 summarizes the thickness, proton conductivity, and Lja of the fiber reinforced Nafion composite membranes obtained from literature reports. The mechanical properties of the composite membranes reported in literature are also listed in Table 12.2. 

Crosslinked Polybenzimidazole-Polybenzoxazine Electrospun Nano-fibers... 

The PBI/PBI-PBz-f (thickness 75 pm) composite membrane containing 20 wt% of the PBI-PBz electrospun nano-fiber, of which 10 wt % was the PBz crosslinker, was doped with a phosphoric acid aqueous solution followed by MEA preparation to perform high-temperature fuel cell tests. The phosphoric acid doping level and proton conductivity, membrane mechanical properties, and fuel cell performance of this PBI/PBI-PBz-f composite are listed in Tables 12.3, 12.4, and 12.5, respectively. The data for neat PBI are given for comparison. The PBI/PBI-PBz-f composite membrane showed higher PAdop and a, higher mechanical strength and strain at break, and better fuel cell performance than the neat-PBI membrane. Compared to the hydrophobic porous PTFE film, the... 

Compared with Nafion/porous PTFE and Nalion/ electrospun nano-fiber composite membranes, there are few reports of PBl/porous PTFE and PBl/electrospun nano-fiber composite membrane for high temperature PEMFC appUcatiOTi. The PBl/porous PTFE composite membrane was shown to exhibit excellent mechanical strength and good durability, which allowed researchers to reduce the membrane thickness and thus reduce the area specific resistance and ultimately improve fuel cell performance. After the report of PBl/porous PTFE composite membrane, two... 

Schreuder-Gibson, H., P. Gibson, K. Senecal, M. Sennett, J. Walker, W. Yeomans, and D. Ziegler (2002). Protective textile materials based on electrospun nano fibers. Journal of Advanced Materials 34(3) 44. 

Zarkoob, S., Reneker, D.H., Eby, R.K., Hudson, S.D., Ertley, D., and Adams, W.W. Structure and morphology of nano electrospun silk fibers. Abstracts of Papers of the American Chemical Society (1998), 216, U122-U122. 

At present a few studies of nanofibers and nanombes are focused on CNS drug delivery. One study evaluated electrospun nanofibers of a degradable polymer, PLGA, loaded with antiinflammatory agent, dexamethasone, for neural prosthetic applications (Abidian and Martin, 2005). A conducting polymer, poly(3,4-ethylenedioxythiophene), was deposited to the nano-fiber surface and the coated nanofibers were then mounted on the microfabricated neural microelectrodes, which were implanted into brain. The drug was released by electrical stimulation that induced a local dilation of the coat and increased permeability. 

Sullivan, R et al. Rhysical and chemical properties of RAN-derived electrospun activated carbon nano fibers and their potential for use as an adsorbent for toxic industrial chemicals. Adsorption. 2012,18(3-4), 265-274. 

Chen, L., Bromberg, L., Hatton, T. A. and Rutledge, G.C. 2007b. Catalytic hydrolysis of p-nitto-phenyl acetate by electrospun polyacrylamidoxime nano fibers. 4675-4682. 

Chun et al. [93] produced carbon nano fibers with diameter in the range from 100 nm to a few microns from electrospim polyacrylonitrile and me-sophase pitch precursor fibers. Wang et al. [94, 95] produced carbon nanofibers from carbonizing of electrospun PAN nanofibers and studied their structure and conductivity. Hou et al. [96] reported a method to use the carbonized electrospun PAN nanofibers as substrates for the formation of multiwall carbon Nanotubes. Kim et al. [14, 97] produced carbon nanofibers from PAN-based or pitch-based electrospim fibers and studied the electrochemical properties of carbon nanofibers web as an electrode for supercapacitor. 

J. Zhao, N. Dehbaii, W. Han, L. Huang, Y. Tang, Electrospun multi-scale hybrid nano-fiber/net with enhanced water swelling ability in rubber composites, Materials Design, ISSN 0264-1275 86 (December 5, 2015) 14—21. http //dx.doi.0rg/lO.lOl6/j. matdes.2015.07.105. 

Carbon fiber precursors the preparations of electrospun nano PI fibers... 

Moreover, there were other reports on the electrospun PI composite Qin et al. reported the fluorescent performance of electrospun PI web mixed with hemicyanine dye (Figure 9), pointed out that the nano fiber structure were helpful to the fluorescence (Qin et al., 2009) Cheng et al. reported the preparation of nonwoven Pl/silica hybrid fabrics by combining electrospinning and controlled in situ sol-gel techniques, their product had better mechanical and thermal properties than ordinary PI electrospun fabrics (Cheng et al., 2009). 

MA 05] Ma Z., Kotaki M., Yong T. et al, Surface engineering of electrospun polyethylene terephthalate (PET) nano fibers towards development of a new material for blood vessel engineering . Biomaterials, vol. 26, pp. 2527-2536, 2005. 

Lin, T, H. X. Wang, and X. G. Wang (2005b). Self-crimping bicomponent nano fibers electrospun from polyacrylonitrile and elastomeric polyurethane. Advanced Materials 17(22) 2699-2703. 

Matthew, G., J. P. Hong, J. M. Rhee, H. S. Lee, and C. Nah (2005). Preparation and characterization of properties of electrospun poly(butylene terephthalate) nano fibers filled with carbon nanotubes. Polymer Testing 24(6) 712-717. 

Wang, Y, et al., 2014. Electrospun tubular scaffold with circumferentially aligned nano fibers for regulating smooth muscle cell growth. ACS Applied Material and Interfaces 6. 

Gao, Y, Sagi, S., Zhang, L., Liao, Y, Cowles, D.M., 2008. Electrospun nano-scaled glass fiber reinforcement of Bis-GMA/TEGDMA dental composites. Journal of Applied Polymer Science 110, 2063-2070. 

---