Nanofiber PMMA electrospun

Fig. 34 SEM images of PF8/PMMA blend electrospun nanofibers with a 10 and b 50 wt. % of PF8. Reprinted with permission from [145]. (2007) by the American Chemical Society...

Kuo CC, Wang CT, Chen WC (2008) Highly-aligned electrospun luminescent nanofibers prepared from polyfluorene/PMMA blends fabrication, morphology, photophysical properties and sensory applications. Macromol Mater Eng 293( 12) 999—1008... 

PPV nanofibers that retain their photoluminescent properties were fabricated by electrospinning PPV precursor solution in solvent mixtures of ethanoFwater [57-59]. The luminescent nanofibers were obtained by electrospinning a solution of PMO-PPV, Eu(ODBM)3phen and PMMA. The electrospun fibers, with diameters ranging from 70 nm to 200 nm and having a parallel orientation, show strong green and red... 

Figure 4.16 PL spectra of (a) 20 wt% PMO-PPV/PMMA eletrospun fibers and net PMO-PPV films, and (b) 20 wt% Eu(ODBM) pben/PMMA eletrospun fibers and net Eu(ODBM)3phen films (c) fluorescent optical microscope images of 20 wt% PMO-PPV/PMMA and (d) 20 wt% Eu(ODBM)3phen/PMMA eletrospun fibers on a quartz flake. (Reprinted with permission from Materials Letters, Preparation and photoluminescence properties of electrospun nanofibers containing PMO-PPV and Eu(ODBM)jphen byS. Tan, X. Feng, B. Zhao etal., 62, 2419-2421. Copyright (2008) Elsevier Ltd)...

Figure 4.22 (a) SEM photograph PANI/PMMA coaxial nanofibers (electrospun PMMA solution 0.18 g ml ). (b) Photograph of a gas sensor based on PANI/PMMA coaxial nanofibers. (Reprinted with permission from Sensors and Actuators B., Gas sensing properties of a composite composed of electrospun polyfmethyl methacrylate) nanofibers and in situ polymerized polyaniline by S. ji, Y. Li and M. Yang, 133, 644-649. Copyright (2008) Elsevier Ltd)... 

K. Desai and C. Sung. DOE optimization and phase morphology of electrospun nanofibers of PANI/PMMA blends. NSTI Nanotechnology Conference and Trade Show, Boston, 429—432 (2004). 

C-C. Kuo, C-H. Lin, and W-C. Chen, Morphology and photophysical properties of light-emitting electrospun nanofibers prepared from poly(fluorene) derivative/PMMA blends. Macromolecules, 40, 6959-6966 (2007). 

H-C. Chen, C-T. Wang, C-L Liu, Y-C. Liu, and W-C Chen, Full color light-emitting electrospun nanofibers prepared from PFO/MEH-PPV/PMMA ternary blends, J. Polymer Sci. B Polymer Phys., 47, 463 70 (2009). 

Relationships between the viscosity and concentration in semidilute regimes of linear homopolymers of PMMA in DMF was investigated for electrospun nanofibers (Fig. 1.7]. The plot of the zero shear viscosity with the C/C distinctly separated into different solution regimes, viz. dilute C/C < 1], semidilute unentangled 1 3]. 

An example of blending was when phenylcarbomylated or azido phenylcarbo-mylated p-CD was successfully blended with polymethyl methacrylate (PMMA) and electrospun into nanofibrous membranes for organic waste treatment and water purification (Kaur et al. 2006). The presence of the p-CD derivatives on the surface of the nanofibers was confirmed by attenuated total reflectance-Fourier transform infrared spectrometry (ATR-FTIR) and x-ray photoelectron spectroscopy (XPS). A solution containing phenolphthalein (PHP) was used to determine the ability of the functionalized membranes to capture small organic molecules. The results showed... 

Kim et al. used the third strategy via the removal of a poly (methyl methacrylate) (PMMA) component during the carbonization of electros-pun immiscible polymers (PAN and PMMA). The higherthe PAN content, the finer the electrospun composite nanofibers. The carbon surface was burned off by generating carbon monoxide and carbon dioxide from outside to inside by the following reactions (1-5) (here, M = Na or K) [140] ... 

Europium ions are photoluminescent rare earth ions that exhibit a high yield of luminescence in the visible light region. Several Eu -containing complexes were electrospun with synthetic polymers such as PVA [6], PMMA [48], PAN [49, 50], and PVP [51-53], in some cases in the presence of other functional inorganic particles. As an example. Fig. 5 shows bifunctional magnetic-photoluminescent nanofibers based on Fc203 nanoparticles and an europium complex [52]. 

An example of a deformation test of a nanofiber nanocomposite is illustrated in Fig. 9.12. The PMMA/Na-MMT nanofiber nanocomposite shows a porous structure (Fig. 9.12(a)). Early in the deformation process, the electrospun fiber will be slightly elongated along the fiber axis due to stress concentrations caused by the nanopores, which leads to a reduction in the fiber diameter (Fig. 9.12(b)). 

Electrospun nanofibers of PMMA with Si02 (20 wt.%) nanoparticles [13, 17] ... 

Figure 1.3 SEM image comparing the diameter of a human hair with that of PMMA nanofibers electrospun from DMF solution. (Courtesy of RTI International.)...

Dong et al. (2004) found a qualitative correlation between e of the solvent and the quality of electrospun nanofibers for PMMA (at a concentration of lOOmg/mL) (Table 4.2), illustrating the effectiveness of high-e solvents (Dong et al. 2004). Similar qualitative observations have been made for other polymers such as PCL (Lee, K. H., et al. 2003b), PMMA... 

Figure 6.2 SEM images of electrospun nanofibers of PMMA/MWCNT showing severai types of irreguiarities (a, b) PMMA/MWCNT (99/1 wt%) (c-f) PMMA/ MWNT (95/5wt%). Scaie bars 1 jjim for (a-c) and 500nm for d-f). Reprinted with permission from Sung (2004). Copyright 2004. American Chemical Society.

Figure 6.4 TEM image of electrospun composite nanofibers of PMMA/SWCNT showing highly aligned CNTs. Reprinted with permission from Sundaray et al. (2006). Copyright 2006. American Institute of Physics.

Orientation of clay platelets in the axial direction has an impact on the mechanical properties of the nanofiber. In PMMA/MMT clay composite nanofibers, the mechanical deformation process was reported to be somewhat different from the brittle failure of comparable bulk nanocomposites. The deformation in the nanofibers occms via shear flow that involves a nanoscale necking process (Kim, G.-M., et al. 2005a). However, in this instance the interpretation is complicated by the nanoporous morphology of the fiber electrospun from CHCI3. 

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