Multiscale modeling to characterize electromechanical behaviors of CNT/polymer nanocomposites considering the matrix damage and interfacial debonding

2020 ◽  
pp. 1-20
Author(s):  
Wonseok Lee ◽  
Ingyun Chung ◽  
Kyungmin Baek ◽  
Sunyoung Im ◽  
Maenghyo Cho
Keyword(s):  
Polymer Nanocomposites ◽  
Multiscale Modeling ◽  
Interfacial Debonding ◽  
The Matrix ◽  
Matrix Damage

ADDITIVE MANUFACTURING OF HIGH-LOADING POLYMER NANOCOMPOSITES WITH MULTISCALE ALIGNMENT

2021 ◽  
Author(s):  
SOYEON PARK ◽  
KUN (KELVIN) FU
Keyword(s):  
Additive Manufacturing ◽  
Polymer Nanocomposites ◽  
High Performance ◽  
Energy Storage Devices ◽  
Storage Devices ◽  
High Productivity ◽  
Macro Scale ◽  
The Matrix ◽  
Multiscale Structures ◽  
Printing Direction

Polymer nanocomposites have advantages in mechanical, electrical, and optical properties compared to individual components. These unique properties of the nanocomposites have attracted attention in many applications, including electronics, robotics, biomedical fields, automotive industries. To achieve their high performance, it is crucial to control the orientation of nanomaterials within the polymer matrix. For example, the electric conductivity will be maximized in the ordered direction of conductive nanomaterials such as graphene and carbon nanotubes (CNTs). Conventional fabrication methods are commonly used to obtain polymer nanocomposites with the controlled alignment of nanomaterials using electric or magnetic fields, fluid flow, and shear forces. Such approaches may be complex in preparing a manufacturing system, have low fabrication rate, and even limited structure scalability and complexity required for customized functional products. Recently, additive manufacturing (AM), also called 3D printing, has been developed as a major fabrication technology for nanocomposites with aligned reinforcements. AM has the ability to control the orientation of nanoparticles and offers a great way to produce the composites with cost-efficiency, high productivity, scalability, and design flexibility. Herein, we propose a manufacturing process using AM for the architected structure of polymer nanocomposites with oriented nanomaterials using a polylactic acid polymer as the matrix and graphite and CNTs as fillers. AM can achieve the aligned orientation of the nanofillers along the printing direction. Thus, it enables the fabrication of multifunctional nanocomposites with complex shapes and higher precision, from micron to macro scale. This method will offer great opportunities in the advanced applications that require complex multiscale structures such as energy storage devices (e.g., batteries and supercapacitors) and structural electronic devices (e.g., circuits and sensors).

scholarly journals Micro Hardness and Erosive Wear Behavior of Tungsten Carbide Filled Epoxy Polymer Nano Composites

2020 ◽  
Vol 5 (3) ◽  
pp. 405-415
Author(s):  
M. Kameswara Reddy ◽  
V. Suresh Babu ◽  
K. V. Sai Srinadh
Keyword(s):  
Tungsten Carbide ◽  
Polymer Nanocomposites ◽  
Adhesive Bonding ◽  
Epoxy Polymer ◽  
Wear Behavior ◽  
Erosive Wear ◽  
Nano Composites ◽  
Erosion Wear ◽  
Wear Properties ◽  
The Matrix

The present work studies the tribological performance of Tungsten Carbide (WC) nanoparticles reinforced epoxy polymer nanocomposites. Polymer nanocomposites are prepared by hand lay-up method. Erosive wear and hardness tests were conducted to examine the physical and wear properties of epoxy/WC nanocomposites. Addition of WC nanoparticles led to significant reduction in erosion rate. In addition to that, incorporation of WC nanoparticles enhanced the hardness of epoxy nano composites. At 2% weight of WC nano filler, nanocomposites showed better performance in erosion wear properties and also in hardness. While at 3wt% of WC filler, least performance in hardness was caused by the weak adhesive bonding between the matrix and filler. The nature of erosion wear behavior was observed. Finally worn surfaces of nanocomposites were inspected using a “scanning electron microscope (SEM)”.

scholarly journals Multiscale Modeling of Fiber Fragmentation Process in Aligned ZnO Nanowires Enhanced Single Fiber Composites

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Parisa Marashizadeh ◽  
Mohammad Abshirini ◽  
Jingyu Wang ◽  
Mrinal C. Saha ◽  
Yingtao Liu
Keyword(s):  
Shear Strength ◽  
Multiscale Modeling ◽  
Interfacial Shear Strength ◽  
Fiber Composites ◽  
Interfacial Shear ◽  
Zno Nanowires ◽  
Single Fiber ◽  
Computational Domain ◽  
The Matrix ◽  
Fiber Fragmentation

AbstractA three-dimensional multiscale modeling framework is developed to analyze the failure procedure of radially aligned zinc oxide (ZnO) enhanced single fiber composites (SFC) under tensile loading to understand the interfacial improvement between the fiber and the matrix. The model introduces four levels in the computational domain. The nanoscale analysis calculates the size-dependent material properties of ZnO nanowires. The interaction between ZnO nanowires and the matrix is simulated using a properly designed representative volume element at the microscale. At the mesoscale, the interface between the carbon fiber and the surrounding area is modeled using the cohesive zone approach. A combination of ABAQUS Finite element software and the failure criteria modeled in UMAT user subroutine is implemented to simulate the single fiber fragmentation test (SFFT) at the macroscale. The numerical results indicate that the interfacial shear strength of SFC can be improved up to 99% after growing ZnO nanowires on the fiber. The effect of ZnO nanowires geometries on the interfacial shear strength of the enhanced SFC is also investigated. Experimental ZnO nanowires enhanced SFFTs are performed on the fabricated samples to validate the results of the developed multiscale model. A good agreement between the numerical and the experimental results was observed.

Multiscale modeling of viscoelastic properties of polymer nanocomposites

2005 ◽  
Vol 43 (8) ◽  
pp. 1005-1013 ◽  
Author(s):  
Oleg Borodin ◽  
Dmitry Bedrov ◽  
Grant D. Smith ◽  
John Nairn ◽  
Scott Bardenhagen
Keyword(s):  
Polymer Nanocomposites ◽  
Multiscale Modeling ◽  
Viscoelastic Properties

Bending Property of Sandwich Beams with MWNTs/Polymer Nanocomposites as Core Materials

2007 ◽  
Vol 345-346 ◽  
pp. 1265-1268 ◽  
Author(s):  
Meng Kao Yeh ◽  
Tsung Han Hsieh
Keyword(s):  
Failure Mechanism ◽  
Polymer Nanocomposites ◽  
Sandwich Beams ◽  
Phenolic Resins ◽  
Weight Percentage ◽  
Bending Property ◽  
The Matrix ◽  
Multi Walled Carbon Nanotubes ◽  
Press Method ◽  
Core Materials

The bending property and failure mechanism of sandwich beams were investigated. The multi-walled carbon nanotubes (MWNTs) were used as the reinforcement in the MWNTs/polymer nanocomposites and the epoxy and phenolic resins were used as the matrix. The MWNTs/polymer nanocomposites were used as the core materials of sandwich beams, which had faces made by graphite/epoxy laminates. In experiment, the hot press method was applied to fabricate the MWNTs/polymer nanocomposites and graphite/epoxy laminates. The weight percentage of MWNTs in core materials and the fiber orientation of face laminates were varied to assess their effects on the bending properties of the sandwich beams. The failure mechanism of sandwich beams with two kinds of polymer core materials was investigated. In analysis, the finite element method was used to obtain the bending behavior of the sandwich beams. The numerical results were in good agreement with the experimental ones.

Modular-based multiscale modeling on viscoelasticity of polymer nanocomposites

2016 ◽  
Vol 59 (2) ◽  
pp. 187-201 ◽  
Author(s):  
Ying Li ◽  
Zeliang Liu ◽  
Zheng Jia ◽  
Wing Kam Liu ◽  
Saad M. Aldousari ◽  
...  
Keyword(s):  
Polymer Nanocomposites ◽  
Multiscale Modeling

scholarly journals New nanocomposites for deep water deoxygenation

2021 ◽  
Vol 23 (4) ◽  
pp. 614-625
Author(s):  
Tatyana E. Fertikova ◽  
Sergey V. Fertikov ◽  
Ekaterina M. Isaeva ◽  
Vyacheslav A. Krysanov ◽  
Tamara A. Kravchenko
Keyword(s):  
Ion Exchange ◽  
Polymer Nanocomposites ◽  
Deep Water ◽  
High Capacity ◽  
Copper Ion ◽  
Polymer Materials ◽  
Residual Oxygen ◽  
The Matrix ◽  
Water Deoxygenation ◽  
Metal Polymer

New metal-polymer nanocomposites for deep water deoxygenation have been obtained and studied. A macro- and monoporous sulphocation exchanger with a nanometer pore size was used as the polymer matrix, and the metal was nanodispersed copper deposited in the pores of the matrix. A specific feature of the studied nanocomposites is their sodium ionic form, which eliminates the possibility of the formation of soluble copper oxidation products. The established linear dependence of the copper capacity on the number of cycles of ion-exchange saturation - chemical deposition shows that the process of metal deposition into the pores of the matrix does not have significant obstacles during 10 cycles and contributes to the production of high-capacity samples.The high efficiency and duration of the life cycle of high-capacity copper ion exchanger nanocomposites have been shown. Experimental studies of water deoxygenation in column-type apparatus with a nanocomposite nozzle were confirmed by a theoretical analysis of the process dynamics. Experimental data and theoretical calculations showed the deep level of water deoxygenation had practically unchanged values of pH and electrical conductivity. Residual oxygen can be controlled and does not exceed 3 μg/l (ppb).The hygienic and economic substantiation of the expediency of using the obtained nanocomposites is provided. The necessity of using modern nanocomposite metal-polymer materials for deep water deoxygenation circulating in technological systems was analysed. When using this innovation, the metal components of the distribution facilities will be protected from corrosion and, therefore, the hygienic requirements for the water quality of centralised drinking water supply systems will be ensured. Deep chemical water deoxygenation using copper ion-exchange polymer nanocomposites in sodium formallows solving the problem of the corrosion resistance of metals, ensuring that water meets hygienic requirements on a large scale.The competitive advantage of the considered water deoxygenation system in comparison with the known systems is the rejection of the use of precious metals-catalysts (palladium, platinum), pure hydrogen, and complex design solutions. The proposed new nanocomposite installation for water deoxygenation is characterised by its ease of use and can be built into a filter system for water purification.SWOT analysis of the advantages and disadvantages of the proposed method of water deoxygenation showed that its main advantages are the high oxygen capacity of the nanocomposite, low residual oxygen content (3 ppb (μg/l)) in the water, and ease of operation of the deoxygenator. Calculations of the economic efficiency of the nanocomposite have been carried out. The breakeven point is reached when producing only ~100 l of nanocomposite and a volume of sales ~1,600,000 roubles, above which a profit can be obtained. The payback period for an investment of ~15,000,000 roubles is rather short and will not exceed 2 years.

EFFECT OF THE NANOFILLER SHAPE ON THE CONDUCTIVE NETWORK FORMATION OF POLYMER NANOCOMPOSITES VIA A COARSE-GRAINED SIMULATION

2018 ◽  
Vol 91 (4) ◽  
pp. 757-766 ◽  
Author(s):  
Fanzhu Li ◽  
Huan Zhang ◽  
Tiantian Li ◽  
Jun Liu ◽  
Yangyang Gao ◽  
...  
Keyword(s):  
Polymer Nanocomposites ◽  
Network Formation ◽  
Dynamics Simulation ◽  
Coarse Grained ◽  
Radius Of Gyration ◽  
Conductive Network ◽  
The Matrix ◽  
Dispersion State ◽  
Conductive Property ◽  
The Relationship

ABSTRACT It is very important to improve the electrical conductivity of polymer nanocomposites, which can widen their application. The effect of the nanofiller shape on the relationship between the nanofiller microstructure and the conductive probability of the nanofiller filled polymer nanocomposites (PNCs) has been investigated in detail by employing a coarse-grained molecular dynamics simulation. Four kinds of nanofiller shapes are considered: rod filler, Y filler, X filler, and sphere filler. First, the mean square radius of gyration gradually decreases from rod filler, Y filler, X filler, to sphere filler, which reflects the highest aspect ratio for rod filler. Meanwhile, the dispersion state of the nanofiller is relatively uniform in the matrix. The conductive probability (denoted by the formation probability of the conductive network) is adopted to stand for the conductive property. The results show that the conductive probability gradually decreases from rod filler, Y filler, X filler, to sphere filler, which is attributed to their gradually decreased size. In summary, the nanofiller shape affects the electric conductive property of PNCs.

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