Enhanced piezoelectric performance of aligned PVDF electrospun fiber mats

Production and Characterization of Nanoporous Polymer Membranes Produced by an Electrospraying Process

10.1115/imece2000-1949 ◽

2000 ◽

Author(s):

Phillip Gibson ◽

Heidi Schreuder-Gibson

Keyword(s):

Transport Properties ◽

Membrane Structure ◽

Protective Clothing ◽

Theoretical Calculations ◽

Electrospun Fiber ◽

Air Flow ◽

Filtration Efficiency ◽

Thin Layers ◽

Direct Result ◽

Fiber Mats

Abstract Electrospinning is a process by which high voltages are used to produce an interconnected membrane-like web of small fibers (10 to 500 nanometers in diameter). This novel fiber spinning technique provides the capacity to lace together a variety of types of polymers, fibers, and particles to produce ultrathin layers which are useful for chemical protective clothing. Of particular interest are electrospun membranes composed of elastomeric fibers, which are under development for several protective clothing applications. The various factors influencing electrospun nonwoven fibrous membrane structure and transport properties are discussed. Performance measurements on experimental electrospun fiber mats compared favorably with transport properties of textiles and membranes currently used in protective clothing systems. It was found that electrospun layers presented minimal impedance to moisture vapor diffusion required for evaporative cooling. There may be special considerations in the application of elastomeric membranes for protective clothing. Effects of membrane distortion upon transport behavior of the structure might be significant. Preliminary measurements have found that changes in elastomeric membrane structure under different states of biaxial strain were reflected in measurements of air flow through the membrane. Changes in membrane structure were also evident in environmental scanning electron microscope images of the pore/fiber rearrangement as the membrane was stretched. Experimental measurements and theoretical calculations show electrospun fiber mats to be extremely efficient at trapping airborne particles. The high filtration efficiency is a direct result of the submicron-size fibers generated by the electrospinning process. Electrospun nanofiber coatings were applied directly to an open cell polyurethane foam. The air flow resistance and aerosol filtration properties correlated with the electrospun coating add-on weight. Particle penetration through the foam layer, which is normally very high, was eliminated by extremely thin layers of electrospun nanofibers sprayed on to the surface of the foam. Electrospun fiber coatings produce an exceptionally lightweight multifunctional membrane for protective clothing applications which exhibits high breathability, elasticity, and filtration efficiency.

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Preparation of electrospun fiber mats using siloxane-containing vaterite and biodegradable polymer hybrids for bone regeneration

Journal of Biomedical Materials Research Part B Applied Biomaterials ◽

10.1002/jbm.b.32952 ◽

2013 ◽

Vol 101 (8) ◽

pp. 1350-1358 ◽

Cited By ~ 13

Author(s):

Kie Fujikura ◽

Sen Lin ◽

Jin Nakamura ◽

Akiko Obata ◽

Toshihiro Kasuga

Keyword(s):

Bone Regeneration ◽

Biodegradable Polymer ◽

Electrospun Fiber ◽

Fiber Mats ◽

Polymer Hybrids

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Optimization of Chitosan/PVA Concentration in Fabricating Nanofibers Membrane and its Prospect as Air Filtration

Materials Science Forum ◽

10.4028/www.scientific.net/msf.901.20 ◽

2017 ◽

Vol 901 ◽

pp. 20-25 ◽

Cited By ~ 1

Author(s):

Himayatus Shalihah ◽

Ahmad Kusumaatmaja ◽

Ari Dwi Nugraheni ◽

Kuwat Triyana

Keyword(s):

Electrospun Fiber ◽

Chemical Compounds ◽

Average Diameter ◽

Air Filtration ◽

Maximum Condition ◽

Chemical Absorption ◽

Fiber Mats ◽

Before And After ◽

Porosity Percentage ◽

Scanning Electron

Chitosan/polyvinyl-alcohol (Chitosan/PVA) based nanofibers were successfully produced using electrospinning machine and investigated their application as air filtration. Firstly, 2 wt% chitosan was dissolved to 1 wt% acetic acid followed by mixing with PVA solution to produce fiber mats or membrane. Secondly, the morphology and diameter of the electrospun fiber were analyzed by using a scanning electron microscopy (SEM), while the chemical compounds in the membrane were characterized using Fourier transform infrared spectroscopy (FTIR). It was found that the conductivity of solution increased by the concentration of chitosan. Meanwhile, the average diameter and percentage of porosity decreased due to the upsurge of the conductivity of the solution. The average diameter of PVA 13 wt% was and the percentage of porosity were 50.32%. The maximum condition of chitosan/PVA was obtained at 20/80 wt%, in line with the average of fiber diameters and the percentage of porosity were 25.32%. Physicochemical properties of chitosan/PVA solution, such as conductivity, morphology, and chemical absorption were investigated before and after the air filtration. The porosity percentage of PVA 13wt% after air filtration changed to 35.85% and the percentage of porosity of chitosan/PVA 20/80 became 25.32%. Remarkable absorption peaks of PVA 13wt% exhibited and - shifted after the air filtration test, it was indicating that functional groups had been reduced. The chemical absorption of chitosan/PVA 20/80 wt% showed at the the region then disappeared after the air filtration test.

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