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Showing 1 to 16 of 16 for “"Wet-spinning"”.
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Wet spinning of porous polyacrylonitrile fibers and affect on fiber oxidation
A spinning apparatus was built to investigate the wet spinning technique for production of porous polyacrylonitrile fibers. Dimethylformamide was used as the solvent and a 17% by weight dope was extruded through a spinneret having four 118 micron diameter holes. It was found that porous fibers …
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Wet-spinning of neat single-walled carbon nanotube fiber from 100+% sulfuric acid
… high concentrations in super acids. Traditional wet-spinning method has been applied to SWNTs to make fibers from SWNTs only with the assistance of 100+% H2SO 4 (neat SWNT fibers). Extensive conditions, including concentrations, coagulation, and operation temperature, have been explored with Daca …
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Wet-spinning and thermal analysis of collagen fibers incorporating hydroxyapatite in mixed and coated form
… used as reinforcement. This study involved the wet-spinning of collagen fibers incorporating HA in mixed and coated form. The weight percent ratio of collagen and HA in the composite fibers was 95 to 5 respectively. HA coating on pure collagen fibers was achieved by immersing them in HA solution …
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Cellulose-based fibers from liquid crystalline solutions
… DMAc solutions of cellulose esters by dry jet/wet spinning process. The mechanical properties, orientation, and crystallinity of the fibers increased as spinning progressed from the isotropic to the anisotropic solution state. High butyryl content enhances both overall solubility and the …
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Poly (2,6-dimethyl-1,4-phenylene oxide) hollow fibres for gas separation.
… The production of hollow fibres by the dry-wet spinning process involves many variables, each having the potential to affect these properties. This is a systematic study of the effect of several variables in the spinning process on the dimensions, morphology and CO2/CH 4 gas separation …
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Stereocomplex poly (methyl methacrylate) fibers and self-reinforced composites and structural color of butterflies and beetles - characterization, replication and mimicry
… PMMA fibers with three different methods - wet spinning, gel spinning and electrospinning. Gel spinning and electrospinning produced the most crystalline fibers. Steroecomplex PMMA fibers were further shown to be resistant to high temperature and also to hot monomer solvent during bulk …
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Characterication of aggregate gland silk factor 1
… within the AgSF1 amino acid sequence. Using wet-spinning methodology we also demonstrate that these proteins can be spun into synthetic silk fibers. Mechanical studies and ultrastructure analyses of the synthetic fibers reveal tensile strengths and toughness values that are below natural …
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Genetically engineered phage fibers and coatings for antibacterial applications
… are constructed from such E3-modified phage, via wet-spinning and glutaraldehyde-crosslinking of the E3-modified phage. Silverization of the free-standing fibers is confirmed via energy-dispersive spectroscopy (EDS) and inductively-coupled plasma atomic emission spectroscopy (ICP-AES), showing …
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Fabrication and evaluation of a collagen-based fiber-gel three-dimensional construct for peripheral nerve repair
… evaluated. These constructs are assembled by wet spinning synthetic collagen fibers and loading them onto a soft collagen gel matrix composed of type I collagen. Wet-spun collagen fibers serve as a rigid substrate to reinforce the gel while facilitating axon growth cone advancement along a …
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The isolation and study of rheological and mass transfer parameters in the spinning of advanced hollow fibre membranes for gas separation
… convection residence time in the dry gap in dry/wet spinning of hollow fibre gas separation membranes. To achieve this, studies were undertaken in which extrusion shear and forced convection residence time were, for the first time de-coupled and studied in isolation. Much of the previous work in …
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The preparation and characterization of hollow fibre membranes for gas separation
A dry-jet wet-spinning process developed industrially for the preparation of hollow fibre membranes suitable for gas separation applications, has been reproduced on a laboratory scale. Polysulphone hollow fibres were spun from a variety of solvents and their gas transport properties were …
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Understand The Structure-Water-Responsive Relationship by Engineering Silk Materials
… peptidoglycan (PG) with silk using a wet-spinning technique. This work provides proof-of-concept demonstrations that use high-energy, muscle-like WR actuators for real-world applications.</p>
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Manipulation of Carbon Nanostructures for Multifunctional Composite Materials
… (PAN) were spun using a dry-jet wet-spinning method followed by oxidative stabilization at 285 °C. The as-spun and stabilized composite fibers exhibited a 50 and 40 % increase, respectively, in modulus when compared to neat PAN. The vacuum pressure impregnation (VPI) method was …
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Polyacrylonitrile hollow fibre membranes for gas separation
… (PAN) hollow fibres have been spun by a dry-jet wet spinning technique, using a commercial PAN polymer (Courtelle) redissolved in dimethylformamide (DMF). After failure to produce satisfactory porous hollow fibres from PAN/DMF solutions, a series of studies on the porous substructure of PAN cast …
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Novel biodegradable fibres for applications in tissue engineering and drug delivery
… (PCL) fibres were produced by wet spinning from solutions in acetone under low shear (gravity flow) conditions. The tensile strength and stiffness of as-spun fibres were highly dependent on the concentration of the spinning solution. Use of a 6% w/v solution resulted in fibres …
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Advanced Rheological Characterization of Nanofilled Materials for Automotive Applications
… recycling and regeneration operations through a wet-spinning process. To obtain an accurate set of constitutive parameters, the material response in nonlinear shear and extensional flows are fitted to the model in order to obtain a universal set of constitutive parameters and scalings that can …