Article
Chemistry, Multidisciplinary
Zengyuan Pang, Erol Yildirim, Melissa A. Pasquinelli, Qufu Wei
Summary: In this study, molecular dynamics simulations were used to directly calculate the properties of PA6/PANI nanofiber ammonia gas sensors and their interactions with ammonia. The sensors showed rapid response, ideal selectivity, and acceptable repeatability, with the simulations providing insights into the molecular-level details of the ammonia sensing performances of the system.
Article
Materials Science, Multidisciplinary
Menglong Xu, Linfeng Wei, Li Ma, Jiawei Lu, Tao Liu, Ling Zhang, Ling Zhao, Chul B. Park
Summary: The study successfully fabricated microcellular foamed polyamide 6/carbon nanotube composites with high-efficiency electromagnetic wave absorption using supercritical CO2 foaming. This eco-friendly and versatile methodology offers a simple way to develop flexible polymer-based electromagnetic wave absorbents.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2022)
Article
Materials Science, Composites
Haoran Liao, Tao Yu, Yan Li
Summary: GO/PA6 nanocomposites with different graphene content were prepared via in situ polymerization, and their rheological properties and thixotropy were studied using rheological methods.
POLYMER COMPOSITES
(2023)
Article
Polymer Science
Anna Katharina Sambale, Michael Maisl, Hans-Georg Herrmann, Markus Stommel
Summary: This paper presents a method to characterize moisture distributions within PA6 samples using low-energy CT techniques and FE modeling, showing good agreement between the reconstructed results and modeling results.
Article
Physics, Applied
G. V. Kozlov, I. V. Dolbin
Summary: This study analyzes the thermal distortion temperature of polyamide-6/organoclay nanocomposites as an example to investigate its effect on thermal stability. The results show that an increase in the thermal distortion temperature is related to the total content of close-packed regions and interfacial regions in the nanocomposites. The anisotropy of the nanofiller in the polymer matrix significantly influences the thermal stability of the nanocomposites. The proposed theoretical model accurately predicts the thermal distortion temperature of the studied nanocomposites.
Article
Biochemistry & Molecular Biology
Baobao Zhao, Xu Han, Chenggong Hu, Xiaoming Qian, Yongchao Duo, Zhen Wang, Quan Feng, Quan Yang, Dongxu Han
Summary: This study investigated the hydrophilic modification of polyester/polyamide 6 hollow segmented pie bicomponent spunbond hydro-entangled microfiber nonwovens (PET/PA6) by UV/TiO2/H2O2. The effects of H2O2, nano-TiO2, and UV irradiation time on the morphology, elemental composition, hydrophilic properties, and mechanical properties of PET/PA6 were systematically studied. The results showed that the modified microfibers had a granular material coating on the surface, and the water contact angle of PET/PA6 decreased to zero in just 0.015 s after 90 min UV/TiO2/H2O2 irradiation.
Article
Polymer Science
Anna Katharina Sambale, Michael Stanko, Jessica Emde, Markus Stommel
Summary: The study investigates the sorption and swelling behavior of polyamide 6 in different conditions and develops a finite element method based on measured data for predicting material characteristics and simulating the sorption and swelling processes.
Article
Polymer Science
Shengnan Li, Tuanhui Jiang, Xiangbu Zeng, Nenggui Zhu, Chao Shen, Wei Gong, Chun Zhang, Li He
Summary: The alpha-olefin-maleic anhydride copolymer DIA was used to modify polyamide 6 (PA6) by melt blending, which resulted in improvements in viscoelasticity, water contact angle, and elongation at break. The modified PA6 samples had a wider molecular weight distribution and reduced crystallinity compared to raw PA6. The addition of DIA also led to smaller cell size and increased cell density in the composite foams, improving foaming properties.
Article
Polymer Science
Min-Kyeom Kim, Hyung-Ick Kim, Jae-Do Nam, Jonghwan Suhr
Summary: This study systematically explores the toughening mechanism of thermoplastic polymer particle materials and ways to overcome the typical compromise in energy-absorbing composites through modeling and experimental research. The main energy-absorbing mechanism was found to be matrix yielding, which results from particle debonding and significantly contributes to crack propagation.
Article
Chemistry, Multidisciplinary
Luisa Rosenstock Voltz, Shiyu Geng, Anita Teleman, Kristiina Oksman
Summary: This study investigates the possibility of adding nanocellulose to a polymer with a high melting temperature, and emphasizes the improvement of mechanical properties in nanocomposites through solid-state drawing.
Article
Materials Science, Composites
Marta Zaccone, Irene Kociolek, Alberto Frache, Costanzo Bellini, Vittorio Di Cocco, Marco Monti
Summary: This paper evaluates the abrasion resistance of a carbon fiber composite filled with layered-silicate clay nanoparticles. The study investigates the dispersion and performance of the clay-epoxy nanocomposite, and determines the optimal content for fiber composite production. The nanocomposite mixture is prepared by dispersing clay nanoparticles in the epoxy monomer, followed by vacuum infusion to produce the fiber reinforced composite. The presence of nanoclay reduces weight loss and damage on the impacted surface.
POLYMER COMPOSITES
(2023)
Article
Chemistry, Multidisciplinary
Yeji Na, Lee Ku Kwac, Hong Gun Kim, Yong Lak Joo, Jin-Hae Chang
Summary: In this study, colorless and transparent polyimide (PI) nanocomposite films were synthesized by dispersing organoclay in poly(amic acid) through a solution intercalation method. The thermomechanical properties and morphology of the films were investigated with different content of organoclay. It was found that the film with a 0.50 wt% organoclay content exhibited the best physical properties, while the properties deteriorated when the organoclay content exceeded a critical content.
Article
Polymer Science
Paul Wetzel, Anna Katharina Sambale, Kai Uhlig, Markus Stommel, Benjamin Schneider, Jan-Martin Kaiser
Summary: This paper investigates the water absorption and resulting changes in mechanical properties of polyamide 6.6. The swelling behavior is observed to be dependent on the injection molding process. The water sorption leads to a decrease in glass transition temperature and significant reduction in stiffness and strength.
Article
Polymer Science
R. Bharath Venkatesh, Daeyeon Lee
Summary: The dynamics of confined polymers are influenced by factors such as entanglement, interfacial friction, and environmental conditions. This study investigates the motion of polydimethylsiloxane in silica nanoparticle packings and reveals the interplay of confinement, interfacial friction, and humidity on polymer dynamics.
Article
Polymer Science
R. Bharath Venkatesh, Daeyeon Lee
Summary: The dynamics of confined polymers are crucial for the properties and performance of nanoscale polymeric systems. This study reveals the reduced role of topological entanglements and the dominant role of interfacial friction in the dynamics of confined polymers.