Excluded Volume Effect on the Extensional Rheology of Carbon Nanotubes: A Mesoscopic Theory

Article Multidisciplinary Sciences

Ultrahigh strength, modulus, and conductivity of graphitic fibers by macromolecular coalescence

Dongju Lee et al.

Summary: Multidimensional nanostructures formed by coalescence of carbon nanotubes can create fibers with exceptional mechanical and electrical properties.

SCIENCE ADVANCES (2022)

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Article Chemistry, Physical

Hierarchical structure control in solution spinning for strong and multifunctional carbon nanotube fibers

Seo Gyun Kim et al.

Summary: This study systematically investigates the spinning process of carbon nanotube fibers and emphasizes the importance of controlling voids for enhancing their macroscopic properties. By utilizing extensional deformation through drawing and controlling the coagulation process, high-performance multifunctional CNT fibers with highly oriented structures were successfully produced.

CARBON (2022)

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Correction Mechanics

Simulated orientational morphology from the measured transient rheology of polycarbonate-carbon fiber composites (May, 10.1007/s13367-022-00031-0, 2022)

Javad Rahmannezhad et al.

KOREA-AUSTRALIA RHEOLOGY JOURNAL (2022)

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Article Physics, Fluids & Plasmas

Simulations of Graphene Oxide Dispersions as Discotic Nematic Liquid Crystals in Couette Flow Using Ericksen-Leslie (EL) Theory

Arash Nikzad et al.

Summary: This study simulated the flow of graphene oxide (GO) dispersions using the Ericksen-Leslie (EL) theory, focusing on the orientation and viscosity distribution in the concentration range of 15 mg/mL to 30 mg/mL. The viscosities obtained from numerical simulations were found to be in good agreement with experimental results, showing the potential of EL theory in predicting the behavior of GO dispersions.

FLUIDS (2022)

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Article Engineering, Environmental

Theoretical and experimental investigation of the wet-spinning process for mechanically strong carbon nanotube fibers

Hyeon Dam Jeong et al.

Summary: The orientation factor plays a crucial role in producing highly strong conductive carbon nanotube (CNT) fibers. A theoretical model is proposed to obtain well-aligned CNT fibers with superior properties through wet-spinning of CNTs in a superacid. The model predicts the minimum draw ratio for achieving target orientation and stable operation window using linear stability analysis of the draw resonance.

CHEMICAL ENGINEERING JOURNAL (2021)

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Article Mechanics

Orientation effect on the rheology of graphene oxide dispersions in isotropic phase, ordered isotropic biphase, and discotic phase

Gyeong Min Choi et al.

Summary: This study investigates the structure and dynamics of graphene oxide aqueous alkaline dispersions through combined simulation and experimental methods. It reveals that as the concentration increases, these materials behave similarly to lyotropic systems, with broader sheet spacing in the ordered phases. The rheological responses in the isotropic phase resemble rod-like liquid crystals, while dispersions in the biphase and discotic phase behave like polydomain liquid crystal polymers.

JOURNAL OF RHEOLOGY (2021)

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Article Mechanics