Fabrication and Characterization of Highly Oriented Composite Nanofibers with Excellent Mechanical Strength and Thermal Stability

Abstract

Here, highly‐oriented poly(m‐phenylene isophthalamide)/polyacrylonitrile multi‐walled carbon nanotube (PMIA/PAN‐MWCNT) composite nanofiber membranes with excellent mechanical strength and thermal stability are successfully produced using electrospinning. It is demonstrated that the cooperation of multi‐walled carbon nanotubes (MWCNT) and high‐speed rotating collection is beneficial to the acquisition of highly oriented fibers and effectively improves the mechanical strength of the membrane along the orientation direction. Specifically, the tensile stress of poly(m‐phenylene isophthalamide)/polyacrylonitrile (PMIA/PAN) membrane is enhanced significantly from 10.6 to 20.7 MPa, benefiting from the highly oriented alignment of the fibers as well as the reinforcing effect of MWCNTs on the fibers. Furthermore, the stressing process of single fiber and fiber aggregates is carefully simulated, and the influence of MWCNTs on the mechanical properties of PMIA/PAN‐MWCNT membranes is analyzed comprehensively, providing a meaningful auxiliary means for the study of mechanical properties. In addition, the composite nanofiber membrane has the advantages of both PMIA and PAN, possessing high temperature resistance, flame‐retardancy, and chemical stability, for an ideal high‐temperature material. In short, the as‐prepared PMIA/PAN‐MWCNT composite membrane with excellent comprehensive property emerges a promising application in many fields, especially in high‐tech.

Highly oriented poly (m‐phenyleneisophthalamide)/polyacrylonitrile based coaxial nanofibers integrated with electrospunpolyacrylonitrile‐silvernanoparticle: Application in air filtration of particulate and microbial contaminants

“…Besides, with uniaxial arrangement of fibers along the stress direction, almost all fibers are involved in sharing the stress. Whereas, with a membrane having random orientation of fibers, only few fibers are involved in sharing the stress and some fibers are not involved in sharing the stress at all, resulting in uneven stress distribution 46 . As illustrated in Figure 7d, it is clear that there is uneven stress distribution with membranes taking a random disordered stacking kind of fiber arrangement, while there will be uniform stress distribution with membranes having a highly oriented stacking of fibers.…”

“…Whereas, with a membrane having random orientation of fibers, only few fibers are involved in sharing the stress and some fibers are not involved in sharing the stress at all, resulting in uneven stress distribution. 46 As illustrated in Figure 7d, it is clear that there is uneven stress distribution with membranes taking a random disordered stacking kind of fiber arrangement, while there will be uniform stress distribution with membranes having a highly oriented stacking of fibers. This is why; the tensile strength of uniaxial-oriented PMIA/PAN nanofibrous membrane is evidently higher than randomly oriented PAN nanofibrous membrane.…”

Potential Applications of Magnesium-Based Polymeric Nanocomposites Obtained by Electrospinning Technique

“…Moreover, for many applications, in which is necessary to control the orientation of nanofibers and their alignment, a rotating collector can be used. Several research works have been carried out involving the use of a rotating drum ( Figure 3 b) in different fields such as developing new material for high-technologies [ 44 ], piezoelectric materials [ 45 ] or medical applications [ 46 ]. Moreover, template electrospinning consists in a collector with geometrical pattern configuration which deeply influences the deposition of electrospun nanofibers ( Figure 3 c).…”

ZIF-8 modified poly (m-phenylene isophthalamide) (PMIA) hybrid membrane for dye wastewater treatment

“…In recent years, poly (m-phenylene isophthalamide) (PMIA) has gained more and more attentions in the research of nanofiber membrane, 38,39 UF membrane 40 and NF membrane 22,[41][42][43] due to its superior properties. The large number of rigid benzene ring structures, amide bonds, intermolecular and intramolecular three-dimensional hydrogen bond structures in PMIA macromolecular made it had an excellent rigidity, high temperature resistance and hydrophilicity.…”