A Novel Random Preferential Orientation of the Crystal A‐axis Along the Radial Direction Confirmed on the Poly‐&lt;i&gt;p&lt;/i&gt;‐phenylenebenzobisoxazole (PBO) Fiber Made with a Water

Kitagawa, Tooru; Kiriyama, Kohei; Shimizu, Yusuke

doi:10.2115/fiber.71.224

Cited by 12 publications

(2 citation statements)

References 24 publications

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“…Therefore, in the wet-spinning process, various parameters cause effects on the utmost structure of the spun fiber, including solvent/nonsolvent pairs, polymer concentration, temperature of the coagulation bath, and so forth [8]. For example, Kitagawa et al reported that the poly-p-phenylenebenzobisoxazole (PBO) fiber prepared with 85 • C water vapor coagulation bath gained higher strength and modulus compared with water vapor [9]. Ji et al suggested improvement in the physical properties of the as-spun polyacrylonitrile (PAN) fiber, such as crystallinity, orientation, and tenacity [10].…”

Section: Introductionmentioning

confidence: 99%

Temperature Effect of Water Coagulation Bath on Chitin Fiber Prepared through Wet-Spinning Process

Nguyen

2021

Polymers

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Chitin was chemically extracted from crab shell waste and dissolved in N,N-dimethyl acetamine/5% lithium chloride (DMAc/5% LiCl) at room temperature to obtain 1% and 2% concentrations of chitin solution. Chitin fibers were prepared by phase inversion at different temperatures of water coagulation bath at 5, 20, and 60 °C. The deconvolution of FTIR spectra indicated that the area portion of the intermolecular hydrogen bonding NH…OC increased at 60 °C due to the higher density of the chitin segment in the fiber. As a result, scanning electron microscope (SEM) measurement suggests that a denser structure of the chitin fiber was observed when the temperature of the coagulation bath increased. In addition, the resultant chitin fibers generated better mechanical properties relative to the amount of chitin concentration and temperature. At 2% of chitin solution, the tensile strength significantly increased from 80 to 182 MPa for the fiber obtained at temperatures of 5 and 60 °C of the water coagulation bath, respectively. Meanwhile, the water content in the fiber significantly decreased from 1101% to 335%. This green synthesis route has high potential for the fabrication of the fiber as future material of interest for biomedical application.

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Section: Introductionmentioning

confidence: 99%

Temperature Effect of Water Coagulation Bath on Chitin Fiber Prepared through Wet-Spinning Process

Nguyen

2021

Polymers

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“…Therefore, in the wet-spinning process, various parameters cause effects on the utmost structure of the spun fiber, including solvent/nonsolvent pairs, polymer concentration, temperature of the coagulation bath, and so forth [8]. For example, Kitagawa et al reported that the poly-p-phenylenebenzobisoxazole (PBO) fiber prepared with 85 • C water vapor coagulation bath gained higher strength and modulus compared with water vapor [9]. Ji et al suggested improvement in the physical properties of the asspun polyacrylonitrile (PAN) fiber, such as crystallinity, orientation, and tenacity [10].…”

Section: Introductionmentioning

confidence: 99%

Temperature Effect of Water Coagulation Bath on Chitin Fiber Prepared through Wet-Spinning Process

Nguyen¹

2021

Prime Archives in Polymer Technology

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Chitin was chemically extracted from crab shell waste and dissolved in N,N-dimethyl acetamine/5% lithium chloride (DMAc/5% LiCl) at room temperature to obtain 1% and 2% concentrations of chitin solution. Chitin fibers were prepared by phase inversion at different temperatures of water coagulation bath at 5, 20, and 60 • C. The deconvolution of FTIR spectra indicated that the area portion of the intermolecular hydrogen bonding NH . . . OC increased at 60 • C due to the higher density of the chitin segment in the fiber. As a result, scanning electron microscope (SEM) measurement suggests that a denser structure of the chitin fiber was observed when the temperature of the coagulation bath increased. In addition, the resultant chitin fibers generated better mechanical properties relative to the amount of chitin concentration and temperature. At 2% of chitin solution, the tensile strength significantly increased from 80 to 182 MPa for the fiber obtained at temperatures of 5 and 60 • C of the water coagulation bath, respectively. Meanwhile, the water content in the fiber significantly decreased from 1101% to 335%. This green synthesis route has high potential for the fabrication of the fiber as future material of interest for biomedical application.

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Effects of hydrophilicity of rigid-rod polymers on the formation of poly-p-pyridylenebenzobisoxazole fibers

2017

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A Novel Random Preferential Orientation of the Crystal A‐axis Along the Radial Direction Confirmed on the Poly‐<i>p</i>‐phenylenebenzobisoxazole (PBO) Fiber Made with a Water

Cited by 12 publications

References 24 publications

Temperature Effect of Water Coagulation Bath on Chitin Fiber Prepared through Wet-Spinning Process

Temperature Effect of Water Coagulation Bath on Chitin Fiber Prepared through Wet-Spinning Process

Temperature Effect of Water Coagulation Bath on Chitin Fiber Prepared through Wet-Spinning Process

Effects of hydrophilicity of rigid-rod polymers on the formation of poly-p-pyridylenebenzobisoxazole fibers

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