Preparation and Characterization of Polyhydroxyamide Hybrid Nanocomposite Films Containing MWCNTs and Clay as Reinforcing Materials

Effects of multi‐walled carbon nanotubes on structures and properties of heat‐resistant poly(m‐phenylene isophthalamide)‐based hollow fiber ultrafiltration membranes

“…In general, the mechanical properties of polymer materials, such as fibers and films, undergo significant enhancement with the incorporation of nanoparticles or reinforcements like the MWCNTs used in this study 31–33 . However, the mechanical reinforcement effects of these polymer materials are ideally obtained when the internal structure of the polymer material is dense with no voids, and maximum reinforcement occurs with excellent interaction between the polymer matrix and MWCNTs 34 .…”

“…In general, the mechanical properties of polymer materials, such as fibers and films, undergo significant enhancement with the incorporation of nanoparticles or reinforcements like the MWCNTs used in this study. [31][32][33] However, the mechanical reinforcement effects of these polymer materials are ideally obtained when the internal structure of the polymer material is dense with no voids, and maximum reinforcement occurs with excellent interaction between the polymer matrix and MWCNTs. 34 For instance, the Halpin-Tsai model 35 allows the prediction of mechanical properties in polymer composites containing various carbon nanotubes (CNTs) by considering the interaction between the polymer matrix and CNTs and many researchers have adopted this theoretical approach to study polymer matrices and optimize CNTs.…”

Preparation and characterization of polyhydroxyamide composite fibers reinforced with carbon nanotubes—Experiment and computation collaborative approach

“…A low temperature solution polycondensation for synthesis of the PHA polymer was carried out using a lab‐scale polymerization reactor under a nitrogen atmosphere, as reported in our previous study 31–33 . For instance, DHB monomer (0.02 mol) was dissolved in a DMAc/HMPA (3:1, vol/vol) mixture solution and then, the solution was cooled to 4°C.…”

“…A low temperature solution polycondensation for synthesis of the PHA polymer was carried out using a lab-scale polymerization reactor under a nitrogen atmosphere, as reported in our previous study. [31][32][33] For instance, DHB monomer (0.02 mol) was dissolved in a DMAc/HMPA (3:1, vol/vol) mixture solution and then, the solution was cooled to 4 C. Then, after gradually adding TPC (0.02 mol) to the solution, the reaction was performed for 1 hour at 4 C and for 5 hours at 25 C using a mechanical stirrer. In addition, the synthesized PHA polymer was confirmed to have an intrinsic viscosity of 1.34 dL/g.…”

“…Especially in relation to the research on improving the mechanical properties of PHAs over the past few years, we have attempted on (1) developing new processes such as fiber spinning, drawing, and film fabrication and (2) introducing various nanoparticles such as clay, graphite, and carbon nanotubes into the composite system through experimental approaches. [31][32][33] In addition, since an amorphous PHA/CNT composite system will be prepared and investigated by MD simulation in this study, it is considered important to exclude the effects of microstructures such as molecular orientation and crystallization of PHA molecules that may occur in the post-treatment process during experiments in order to reduce the realistic gap between experiment and simulation. Thus, to observe only the effects of the CNTs on the PHA/CNTs composite system using experimentalcomputational perspective, various properties of neat asspun PHA/MWCNTs composite fibers without additional stretching or drawing process were adopted.…”