Free volume and polymeric structure analyses of aromatic polyamide membranes: A molecular simulation and experimental study

2010 ◽  
Vol 354 (1-2) ◽  
pp. 93-100 ◽  
Author(s):  
Kai-Shiun Chang ◽  
Yun-Hsuan Huang ◽  
Kueir-Rarn Lee ◽  
Kuo-Lun Tung
Keyword(s):  
Experimental Study ◽  
Molecular Simulation ◽  
Free Volume ◽  
Aromatic Polyamide ◽  
Polymeric Structure ◽  
Polyamide Membranes

Ultrastrong, Free-Standing and Large Nanofilms of Pyrenearamid

2019 ◽  
Author(s):  
Amalia Rapakousiou ◽  
Alejandro López-moreno ◽  
Belén Nieto-Ortega ◽  
M. Mar Bernal ◽  
Miguel A. Monclús ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Building Block ◽  
Aromatic Polyamide ◽  
Free Standing ◽  
Spatial Confinement ◽  
Polymeric Structure ◽  
Reduced Modulus ◽  
Organizational Arrangement ◽  
Polycyclic Aromatic ◽  
Nanoscale Building Block

We introduce poly(1,6-pyrene terephthalamide) polymer (PPyrTA) as an aromatic polyamide analogue of poly(p-phenylene terephthalamide) (PPTA), also known as Kevlar®. This work shows that the incorporation of polycyclic aromatic pyrene moieties improves drastically the mechanical properties of the polymeric structure, increasing elastic nanoindentation-determined modulus and hardness by factors of 1.9 and 4.3, respectively. Liquid deprotonated dispersions of PPyrTA nanofibers were used as nanoscale building block for producing large-surface, free-standing polymer macroscopic nanofilms. This 2D assembly leads to further significant improvements in reduced modulus and hardness (more than twice) compared to the starting polymer macroscale fibres, due to a better re-organizational arrangement of the PPyrTA nanofibers in the nanofilms, formed under 2D spatial confinement.

Molecular simulation and experimental study on the inclusion of rutin with β-cyclodextrin and its derivative

2022 ◽  
pp. 132359
Author(s):  
Jingya Liu ◽  
Sidian Zhang ◽  
Xiuying Zhao ◽  
Yi Lu ◽  
Meng Song ◽  
...  
Keyword(s):  
Experimental Study ◽  
Molecular Simulation

scholarly journals A stable polymeric chain configuration producing high performance PEBAX-1657 membranes for CO2 separation

2019 ◽  
Vol 1 (7) ◽  
pp. 2633-2644 ◽  
Author(s):  
Pankaj Sharma ◽  
Young-Jin Kim ◽  
Min-Zy Kim ◽  
Syed Fakhar Alam ◽  
Churl Hee Cho
Keyword(s):  
Free Volume ◽  
High Performance ◽  
Polymeric Chain ◽  
Co2 Separation ◽  
Polymeric Structure ◽  
Chain Configuration

By improving the polymeric structure and reforming the free-volume of pristine PEBAX films, the permeability, as well as CO2 selectivity, can be enhanced simultaneously.

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