Polymer crystalline structure and morphology changes in nylon-6/ZnO nanocomposites

2003 ◽  
Vol 41 (10) ◽  
pp. 1033-1050 ◽  
Author(s):  
Junrong Zheng ◽  
Richard W. Siegel ◽  
C. Gregory Toney
Keyword(s):  
Crystalline Structure ◽  
Nylon 6 ◽  
Structure And Morphology ◽  
Morphology Changes

scholarly journals Hollow cathode magnetron deposition of AlN thin films: crystalline structure and morphology

2006 ◽  
Vol 36 (2a) ◽  
pp. 332-335 ◽  
Author(s):  
R. S. Pessoa ◽  
G. Murakami ◽  
G. Petraconi ◽  
H. S. Maciel ◽  
I. C. Oliveira ◽  
...  
Keyword(s):  
Thin Films ◽  
Crystalline Structure ◽  
Hollow Cathode ◽  
Magnetron Deposition ◽  
Structure And Morphology

Superhydrophobicity of polyvinylidene fluoride induced by integrating liquid-exfoliated hexagonal boron nitride nanosheets

2019 ◽  
Vol 32 (1) ◽  
pp. 73-82 ◽  
Author(s):  
Lulu An ◽  
Changning Bai ◽  
Yongqing Bai ◽  
Bin Zhang ◽  
Yuanlie Yu ◽  
...  
Keyword(s):  
Waste Water ◽  
Water Treatment ◽  
Boron Nitride ◽  
Polyvinylidene Fluoride ◽  
Hexagonal Boron Nitride ◽  
Waste Water Treatment ◽  
Preparation Process ◽  
Structure And Morphology ◽  
Boron Nitride Nanosheets ◽  
Morphology Changes

The superhydrophobicity of polyvinylidene fluoride (PVDF) membranes can be achieved by adding a small amount of hexagonal boron nitride nanosheets ( h-BNNSs) during the preparation process. The h-BNNSs can be fabricated by two steps of facile ultrasonication of commercial h-BN powders in water and subsequent centrifugation process. The introduction of a small amount of h-BNNSs into PVDF will result in structure and morphology changes of final PVDF membranes. The changes of the structure and morphology can significantly reduce the surface wettability of PVDF membranes, even generating superhydrophobicity. However, the superoleophilicity of PVDF membranes is well kept, which is not influenced by the introduction of h-BNNSs. The excellent superhydrophobicity and superoleophilicity make these porous h-BNNS/PVDF composites to be promising candidates for separating oil and water as membranes in practical oil-polluted waste water treatment.

Crystalline Structure and Morphology of the Phases in MgO, TiO2 and ZrO2 Prepared by the Sol-Gel Technique

1995 ◽  
Vol 405 ◽  
Author(s):  
Bokhimi ◽  
J. L. Boldu ◽  
E. Muñoz ◽  
O. Novaro ◽  
T. Lopez ◽  
...  
Keyword(s):  
Crystalline Structure ◽  
Powder Diffraction ◽  
Sol Gel ◽  
Temperature Evolution ◽  
X Ray ◽  
Structure And Morphology ◽  
Gel Technique ◽  
Effect Of Doping

AbstractThe temperature evolution of the crystalline structure of the nanophases found in sol-gel MgO, TiO2 and ZrO2 systems was analyzed by performing x-ray powder diffraction. The structure and concentration of each phase was determined by using the Rietveld technique. The effect of doping MgO and TiO2 systems with platinum was also studied.

Molecular Orientation and Crystalline Structure of Aligned Electrospun Nylon 6 Nanofibers: Effect of Gap Size

2011 ◽  
Vol 175-176 ◽  
pp. 333-336
Author(s):  
Naotaka Kimura ◽  
Jong Chul Park ◽  
Byoung Suhk Kim ◽  
Ick Soo Kim
Keyword(s):  
Crystalline Structure ◽  
Molecular Orientation ◽  
Nylon 6 ◽  
Polymer Chains ◽  
Fiber Axis ◽  
Fiber Direction ◽  
Gap Size ◽  
Metal Plates ◽  
Ft Ir ◽  
Ft Ir Spectroscopy

We studied the effect of gap size on molecular orientation and crystalline structure of theuniaxially well-aligned nylon 6 nanofibers produced in the gap of the negatively charged metal plates. As evidenced by polarized FT-IR spectroscopy, relative intensity in several absorbance bands, including the N-H stretching, amide I, II, and III vibrations were found to be different in the parallel and perpendicular polarized FT-IR spectra. Moreover, X-ray analysis indicated that the metastable γ-form was predominant in the as-spun nylon 6 nanofiber, and was transformed into the thermodynamically stable α-form by increasing the cap size. These results suggested that the polymer chains were oriented perpendicular to the fiber direction. Molecular orientation to the fiber axis was enhanced as increasing the gap size.

Molecular Orientation and Crystalline Structure of Aligned Electrospun Nylon-6 Nanofibers: Effect of Gap Size

2010 ◽  
Vol 295 (12) ◽  
pp. 1090-1096 ◽  
Author(s):  
Naotaka Kimura ◽  
Han-Ki Kim ◽  
Byoung-Suhk Kim ◽  
Keun-Hyung Lee ◽  
Ick-Soo Kim
Keyword(s):  
Crystalline Structure ◽  
Molecular Orientation ◽  
Nylon 6 ◽  
Gap Size
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