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    • Fabrication of Highly Oriented Piezoelectric Nanofibers Using a Low Cost and Lab-Scale Electrospinning System
    Authors: Duc-Nam Nguyen; Van-Tuan Nguyen; Ich-Hung Dam; Van-Huong Vu;  Advisor: -;  Co-Author: - (2022)

    A large number of piezoelectric polymers have been studied and applied widely recently and become an attractive topic in both material science and applied engineering fields. Piezoelectric polymers such as Poly(vinyl fluoride) and Poly(γ-benzyl, L-glutamate) fabricated in nanofibers have shown impressive properties in the aspect of low weight, high flexibility and high piezoelectricity. One of the major parameters influencing to the piezoelectricity of electrospun fibers is the orientation. This paper reviews the contribution of fiber orientation to the piezoelectricity properties and the technique to manipulate the orientation. The research group introduces for the first time a fully integrated and compact electrospinning system which is low cost and suitable for both lab-scale and...
    • Significant Electromechanical Characteristic Enhancement of Coaxial Electrospinning Core–Shell Fibers
    Authors: Nguyen, Duc Nam; Wonkyu, Moon;  Advisor: -;  Co-Author: - (2022)

    Electrospinning is a low-cost and straightforward method for producing various types of polymers in micro/nanofiber form. Among the various types of polymers, electrospun piezoelectric polymers have many potential applications. In this study, a new type of functional microfiber composed of poly(γ-benzyl-α,L-glutamate) (PBLG) and poly(vinylidene fluoride) (PVDF) with significantly enhanced electromechanical properties has been reported. Recently reported electrospun PBLG fibers exhibit polarity along the axial direction, while electrospun PVDF fibers have the highest net dipole moment in the transverse direction. Hence, a combination of PBLG and PVDF as a core–shell structure has been investigated in the present work. On polarization under a high voltage, enhancement in the net dipol...
    • Significant Electromechanical Characteristic Enhancement of Coaxial Electrospinning Core–Shell Fibers
    Authors: Duc-Nam Nguyen; Wonkyu, Moon;  Advisor: -;  Co-Author: - (2022)

    Electrospinning is a low-cost and straightforward method for producing various types of polymers in micro/nanofiber form. Among the various types of polymers, electrospun piezoelectric polymers have many potential applications. In this study, a new type of functional microfiber composed of poly(γ-benzyl-α,L-glutamate) (PBLG) and poly(vinylidene fluoride) (PVDF) with significantly enhanced electromechanical properties has been reported. Recently reported electrospun PBLG fibers exhibit polarity along the axial direction, while electrospun PVDF fibers have the highest net dipole moment in the transverse direction. Hence, a combination of PBLG and PVDF as a core–shell structure has been investigated in the present work. On polarization under a high voltage, enhancement in the net dipol...
    • Fabrication of Highly Oriented Piezoelectric Nanofibers Using a Low Cost and Lab-Scale Electrospinning System
    Authors: Nguyen, Duc Nam; Nguyen, Van Tuan; Dam, Ich Hung; Vu, Van Huong;  Advisor: -;  Co-Author: - (2022)

    A large number of piezoelectric polymers have been studied and applied widely recently and become an attractive topic in both material science and applied engineering fields. Piezoelectric polymers such as Poly(vinyl fluoride) and Poly(γ-benzyl, L-glutamate) fabricated in nanofibers have shown impressive properties in the aspect of low weight, high flexibility and high piezoelectricity. One of the major parameters influencing to the piezoelectricity of electrospun fibers is the orientation. This paper reviews the contribution of fiber orientation to the piezoelectricity properties and the technique to manipulate the orientation. The research group introduces for the first time a fully integrated and compact electrospinning system which is low cost and suitable for both lab-scale and...