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Journal articles on the topic 'MoS2-polymer'

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Author: Grafiati

Published: 6 September 2023

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1

Zhou, Ke Qing, Zhou Gui, and Yuan Hu. "MoS₂: Advanced Nanofillers for Polymer Nanocomposites." Advanced Materials Research 1105 (May 2015): 21–25. http://dx.doi.org/10.4028/www.scientific.net/amr.1105.21.

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Since discovery of graphene, great attention had been paid to other two dimensional (2D) layered materials. As a graphene-like layered nanomaterial, molybdenum disulfide (MoS2) had gained enormous attention from the materials fields which had been widely used in many areas such as solid lubricants, lithium ion batteries, photocatalysts, sensors or as conductive fillers in polymer composites. In this work, MoS2 nanosheets were incorporated into polymer matrix as nanofillers by three typical preparation methods, including solvent blending, in situ polymerization and melt blending method. The MoS2 nanosheets were dispersed well in the polymer matrices which improved the thermal stability, mechanical properties and reduced fire hazards of the composites obviously. The improvements in the thermal properties, fire resistance properties and mechanical properties of polymer/MoS2 nanocomposites were mainly attributed to good dispersion of MoS2, physical barrier effects of MoS2 and catalytic char function of MoS2 nanosheets.

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2

Shi, Shih-Chen, and Jhen-Yu Wu. "Enhancement Mechanism for Carbohydrate Polymer Green Lubricant." Polymers and Polymer Composites 26, no. 1 (January 2018): 85–90. http://dx.doi.org/10.1177/096739111802600110.

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The objective of this study was to investigate a mechanism for enhancing the tribological properties of a green polymer material using MoS2, which is a common material with good tribological qualities. In this study, MoS2 nanoparticles were added to the biopolymer hydroxypropyl methylcellulose, obtaining an evident enhancement of the tribological behavior. The suitable content of MoS2 can provide the best structure of the composite film and optimize the transfer layer, and further enhance the tribological properties. The addition of 5–10% MoS2 particles to the polymer can improve the surface roughness up to 60%, reduce the friction coefficient of the thin-film material by more than 40% and reduce the wear rate of the substrate by 65%. The mechanism by which MoS2 additives enhance the tribological properties of the biopolymer material lies in the reduction of the run-in time in the initial stage of wear by modifying the surface roughness. This effect accelerates the formation of a transfer layer of good quality and provides good tribological properties.

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3

Saboor, Khalid, Jan, Khan, Farooq, Afridi, Sadiq, and Arif. "PS/PANI/MoS2 Hybrid Polymer Composites with High Dielectric Behavior and Electrical Conductivity for EMI Shielding Effectiveness." Materials 12, no. 17 (August 22, 2019): 2690. http://dx.doi.org/10.3390/ma12172690.

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Liquid exfoliated molybdenum disulfide (MoS2) nanosheets and polyaniline (PANI) nanoparticles are dispersed in polystyrene (PS) matrix to fabricate hybrid polymer composites with high dielectric and electromagnetic interference (EMI) shielding behavior. A phase-separated morphology is formed when PANI and MoS2 are incorporated into polystyrene (PS) matrix. An increasing concentration of MoS2 nanoparticles inside PS/PANI (5 wt %) polymer blend forms an interconnected network, resulting in high electrical conductivity and dielectric behavior, making them a suitable candidate for EMI shielding application. An increment in dielectric constant and loss, up to four and five orders of magnitude, respectively, is recorded at a maximum concentration of 1 wt % of MoS2 in PS/PANI-5 polymer blend at 100 Hz. The enhanced dielectric characteristics for PS/PANI/MoS2 composites are then theoretically evaluated for the estimation of EMI shielding effectiveness in the frequency range of 100 Hz to 5 MHz. The maximum dielectric constant and loss achieved for PS/PANI-5 wt %/MoS2-1 wt % are responsible for estimated shielding effectiveness of around 92 dB at 100 Hz. The increase in dielectric behavior and shielding effectiveness is probably due to the increased number of charged dipoles accumulated at the insulator–conductor interface.

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4

Zhong, Wen, Siqiang Chen, Lei Ma, and Zhe Tong. "Tribological Properties of Carbon Fabric/Epoxy Composites Filled with FGr@MoS2 Hybrids under Dry Sliding Conditions." Materials 15, no. 22 (November 10, 2022): 7951. http://dx.doi.org/10.3390/ma15227951.

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Hybrids of fluorinated graphite/MoS2 (FGr@MoS2) were prepared via a hydrothermal method and used as lubricating additives to take full advantage of the synergy between FGr and MoS2 in carbon-fiber-reinforced polymer (CFRP). The results show a 21.6% reduction in the friction coefficient compared to the neat sample when the CFRP was filled with 1.2 wt.% FGr@MoS2 hybrids. The addition of 1.5 wt.% FGr@MoS2 resulted in a 60.9% reduction in the wear rate compared to neat CFRP. For the 1.2 wt.% FGr@MoS2-reinforced CFRP, the friction coefficient maintained a relatively steady value of approximately 0.46 at various temperatures, indicating frictional stability. However, the wear rate increased by 13.95% at 60 ℃ compared to that at room temperature. The interfacial bonding force between the FGr@MoS2 hybrid and the matrix, as well as the adhesive force with the surface of the counterpart ball, is improved, caused by the heterostructure of FGr@MoS2, resulting in enhanced mechanical properties and formation efficiency as well as the transfer film on the surface of the counterpart ball. The results suggest that an FGr@MoS2 micro-nano structure is a promising additive to be applied in polymer tribology.

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5

Yuan, Bin, Jun Liu, Lei Qiu, Meng-Jie Chang, and Ya-Qing Li. "Effect of MoS2 Nanosheet Fillers on Poly(vinyl alcohol) Nanofibre Composites Obtained by the Electrospinning Method." Fibres and Textiles in Eastern Europe 28, no. 3(141) (June 30, 2020): 62–67. http://dx.doi.org/10.5604/01.3001.0013.9020.

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The graphene-like two dimensional (2D) inorganic materials have been been shown great interest for a variety of applications. In this work, polymer composite nanofibres containing molybdenum disulfide (MoS2) nanosheets were obtained by electrospinning. The MoS2 nanosheets were well dispersed inside the fibres, and the nanofibres maintained the fibre morphology well with the MoS2 nanosheets embedded. The incorporation of MoS2 nanosheets changes polymer nanofibre morphology from round to ribbon-like. Moreover, through thermogravimetric (TG) analysis and dynamic mechanical thermal analysis (DMTA) measurements, it was found that the MoS2 nanosheets as an additive material led to an increase in thermal stability and in the storage modulus. This work comprises an extensive approach to producing a novel 2D inorganic-organic composite structure, which should be applicable for membrane engineering with enhanced thermal and mechanical stability.

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6

Khan, Muhammad Bilal, Rahim Jan, Amir Habib, and Ahmad Nawaz Khan. "Evaluating Mechanical Properties of Few Layers MoS2 Nanosheets-Polymer Composites." Advances in Materials Science and Engineering 2017 (2017): 1–6. http://dx.doi.org/10.1155/2017/3176808.

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The reinforcement effects of liquid exfoliated molybdenum disulphide (MoS2) nanosheets, dispersed in polystyrene (PS) matrix, are evaluated here. The range of composites (0~0.002 volume fraction (Vf) MoS2-PS) is prepared via solution casting. Size selected MoS2 nanosheets (3~4 layers), with a lateral dimension L 0.5~1 µm, have improved Young’s modulus up to 0.8 GPa for 0.0002 Vf MoS2-PS as compared to 0.2 GPa observed for PS only. The ultimate tensile strength (UTS) is improved considerably (~×3) with a minute addition of MoS2 nanosheets (0.00002 Vf). The MoS2 nanosheets lateral dimension and number of layers are approximated using atomic force microscopy (AFM). The composites formation is confirmed using X-ray diffraction (XRD) and scanning electron microscopy (SEM). Theoretical predicted results (Halpin-Tsai model) are well below the experimental findings, especially at lower concentrations. Only at maximum concentrations, the experimental and theoretical results coincide. The high aspect ratio of MoS2 nanosheets, homogeneous dispersion inside polymer, and their probable planar orientation are the possible reasons for the effective stress transfer, resulting in enhanced mechanical characteristics. Moreover, the micro-Vickers hardness (HV) of the MoS2-PS is also improved from 19 (PS) to 23 (0.002 Vf MoS2-PS) as MoS2 nanosheets inclusion may hinder the deformation more effectively.

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7

Balch, Halleh B., Austin M. Evans, Raghunath R. Dasari, Hong Li, Ruofan Li, Simil Thomas, Danqing Wang, et al. "Electronically Coupled 2D Polymer/MoS2 Heterostructures." Journal of the American Chemical Society 142, no. 50 (December 7, 2020): 21131–39. http://dx.doi.org/10.1021/jacs.0c10151.

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8

Sahu, Megha, Lakshmi Narasimhan, Ashok M. Raichur, Alexandru Sover, Romeo C. Ciobanu, Nicolae Lucanu, and Mihaela Aradoaei. "Improving Fracture Toughness of Tetrafunctional Epoxy with Functionalized 2D Molybdenum Disulfide Nanosheets." Polymers 13, no. 24 (December 17, 2021): 4440. http://dx.doi.org/10.3390/polym13244440.

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In this work, improved fracture toughness of tetra-functional epoxy polymer was obtained using two-dimensional (2H polytype) molybdenum disulfide (MoS2) nano-platelets as a filler. Simultaneous in-situ exfoliation and functionalization of MoS2 were achieved in the presence of cetyltrimethylammonium bromide (CTAB) via sonication. The aim was to improve the dispersion of MoS2 nanoplatelets in epoxy and enhance the interfacial interaction between nanoplatelets and epoxy matrix. Epoxy nanocomposites with CTAB functionalized MoS2 (f-MoS2) nanoplatelets, ranging in content from 0.1 wt% up to 1 wt%, were fabricated. Modified MoS2 improved the fracture properties (81%) of tetrafunctional epoxy nanocomposites. The flexural strength and compressive strength improved by 64% and 47%, respectively, with 0.25 wt% loading of f-MoS2 nanoplatelets compared to neat epoxy. The addition of f-MoS2 nanoplatelets enhanced the thermomechanical properties of epoxy. This work demonstrated the potential of organically modified MoS2 nanoplatelets for improving the fracture and thermal behavior of tetrafunctional epoxy nanocomposites.

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9

Drozdov, AD, and J. deClaville Christiansen. "Modeling dielectric permittivity of polymer composites filled with transition metal dichalcogenide nanoparticles." Journal of Composite Materials 54, no. 25 (May 1, 2020): 3841–55. http://dx.doi.org/10.1177/0021998320922601.

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A model is developed for the dielectric permittivity of polymer nanocomposites reinforced with transition metal dichalcogenide fillers at microwave frequencies. The model takes into account aggregation of nanoparticles into clusters (that involve both filler and matrix components) and the aspect ratio of aggregates. The governing equations involve four material parameters that are found by matching observations on the real and imaginary parts of the dielectric permittivity of polymers reinforced with MoS2 and WS2 micro- and nanospheres, MoS2 nanosheets and nanoflowers, and composite heterostructures formed by MoS2 and MoS2-CoS2 nanoparticles with graphene and reduced graphene oxide. Good agreement is demonstrated between results of simulation and the experimental data at frequencies in the S, X, and Ku bands of the electromagnetic spectrum. It is shown that composite heterostructures have superior dielectric properties compared with those of neat transition metal dichalcogenide nanoparticles.

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10

Sethulekshmi, A. S., Jitha S. Jayan, Saritha Appukuttan, and Kuruvilla Joseph. "MoS2: Advanced nanofiller for reinforcing polymer matrix." Physica E: Low-dimensional Systems and Nanostructures 132 (August 2021): 114716. http://dx.doi.org/10.1016/j.physe.2021.114716.

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11

Wang, Xin, Weiyi Xing, Xiaming Feng, Lei Song, and Yuan Hu. "MoS2/Polymer Nanocomposites: Preparation, Properties, and Applications." Polymer Reviews 57, no. 3 (April 3, 2017): 440–66. http://dx.doi.org/10.1080/15583724.2017.1309662.

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12

Jilani, Asim, and Ammar A. Melaibari. "MoS2-Cu/CuO@graphene Heterogeneous Photocatalysis for Enhanced Photocatalytic Degradation of MB from Water." Polymers 14, no. 16 (August 10, 2022): 3259. http://dx.doi.org/10.3390/polym14163259.

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The industrial revolution resulted in the contamination of natural water resources. Therefore, it is necessary to save and recover the natural water resources. In this regard, polymer-based composites have attracted the scientific community for their application in wastewater treatment. Herein, molybdenum disulfide composites with a mix phase of copper, copper oxide and graphene (MoS2-Cu/CuO@GN) were synthesized through the hydrothermal method. Methylene blue (MB) was degraded by around 93.8% within the 30 min in the presence of MoS2-Cu/CuO@GN under visible light. The degradation efficiency was further enhanced to 98.5% with the addition of H2O2 as a catalyst. The photocatalytic degradation efficiency of pure MoS2, MoS2-Cu/CuO and MoS2-Cu/CuO@GN were also investigated under the same experimental conditions. The structural analysis endorses the presence of the Cu/CuO dual phase in MoS2. The charge recombination ratio and band gap of MoS2-Cu/CuO@GN were also investigated in comparison to pure MoS2 and MoS2-Cu/CuO. The chemical states, the analysis of C1s, O1s, Mo3d and Cu2p3, were also analyzed to explore the possible interaction among the present elements. The surface morphology confirms the existence of Cu/CuO and GN to MoS2.

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13

Yang, Jiwoong, Moon Kee Choi, Yuewen Sheng, Jaebong Jung, Karen Bustillo, Tongxin Chen, Seung-Wuk Lee, et al. "MoS2 Liquid Cell Electron Microscopy Through Clean and Fast Polymer-Free MoS2 Transfer." Nano Letters 19, no. 3 (February 11, 2019): 1788–95. http://dx.doi.org/10.1021/acs.nanolett.8b04821.

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14

Mu, Li Wen, Xin Feng, Yi Jun Shi, Huai Yuan Wang, and Xiao Hua Lu. "Friction and Wear Behaviors of Solid Lubricants/Polyimide Composites in Liquid Mediums." Materials Science Forum 654-656 (June 2010): 2763–66. http://dx.doi.org/10.4028/www.scientific.net/msf.654-656.2763.

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The tribological properties of polyimide (PI) composites reinforced with graphite or MoS2 sliding in liquid alkali and water as well as dry friction were investigated using a ring-on-ring tester. The results show that the friction coefficient (μ) and wear rate (W) for both graphite/PI and MoS2/PI composites in different liquid mediums are μdry>μwater >μalkali and Wwater>Wdry >Walkali. Results also indicate that the friction coefficient and wear rate of the PI composites filled with different solid lubricants are μMoS2 >μgraphite and W MoS2 >Wgraphite in different liquid mediums. In addition, the hydrophobic inorganic fillers are fit for the reinforcement of polymer-based composites sliding in liquid mediums. It is also concluded from the authors’ work that the wear rate and friction coefficient of polymer-based (such as PI, PTFE) composites in the alkali lubricated conditions is lowest among all the friction conditions. This may be attributed to the ionic hydration in the alkaline solution.

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15

Nisar, Talha, Torsten Balster, and Veit Wagner. "Mechanical transfer of electrochemically grown molybdenum sulfide layers to silicon wafer." Journal of Applied Electrochemistry 51, no. 9 (May 13, 2021): 1279–86. http://dx.doi.org/10.1007/s10800-021-01570-0.

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Abstract Large area MoS2 ultra-thin film deposition is one of the big challenges in the recent years. Electrodeposition provides an opportunity to grow such ultra-thin films on large scale. However, the transfer of the electrochemically grown film is challenging. Standard transfer of those thin films is done by wet etching in which the underlying substrate is etched. In this work, the polymer coated electrodeposited MoS2 films on Au are separated mechanically from the underlying substrate by using ultra-sonication. Collapse of micron-sized bubbles produced by ultra-sonication at the interface of Au and silicon substrate provides enough energy for separation due to their weak adhesion. The Au layer is then removed by standard Au-etchant (K/KI) and the polymer coated film is transferred to a desired substrate. Ammonium tetrathiomolybdate (ATTM) has been used as precursor material for the electrodeposition of the films. Initial electrochemically grown films consist of MoS3 which is reduced to MoS2 by a post-annealing step at 450–900 °C. Obtained films are investigated by AFM, Raman, UV–Vis and XPS. Crystal quality improves by increasing the post-annealing temperature. The thickness of the thinnest film was found to be equivalent to 2 monolayers of MoS2, which is desirable for future electronics. Graphic abstract

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16

Angulo, Aurianny Lima, Camila Laura Celis Rodriguez, and Guilhermino José Macedo Fechine. "Photooxidative Behavior of Polystyrene Nanocomposites Filled with Two-Dimensional Molybdenum Disulfide." Polymers 15, no. 9 (April 28, 2023): 2099. http://dx.doi.org/10.3390/polym15092099.

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This study aimed to investigate how an ultralow content of a molybdenum disulfide (MoS2) two-dimensional particle affects the photodegradation mechanism of polystyrene (PS). Here, an accelerated weathering study was presented on neat polystyrene and its nanocomposites produced with 0.001, 0.002, 0.003 and 0.005 wt% of molybdenum disulfide (MoS2) exposed for various irradiation intervals (up to 8 weeks). The polymer photo-transformations were monitored using size exclusion chromatography (SEC), infrared spectroscopy (FTIR), and UV-Vis spectroscopy. The FTIR and UV/Vis results indicate that the PS degradation mechanism was not altered by the presence of MoS2 particles; however, the degradation reactions were slowed down at higher MoS2 contents (>0.003%). The SEC results proved the stabilizer effect due to MoS2 particles, where M¯n, M¯w, and M¯w/M¯n values after 8 weeks were less modified when compared with the neat PS results. The MoS2 acted as a UV stabilizer, and these two-dimensional particles acted by deactivating the free radicals generated by the PS matrix, even considering the low amount of the filler (<0.005 wt%).

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17

Ma, Wanwan, and Kyung Ho Row. "Solid-Phase Extraction of Catechins from Green Tea with Deep Eutectic Solvent Immobilized Magnetic Molybdenum Disulfide Molecularly Imprinted Polymer." Molecules 25, no. 2 (January 9, 2020): 280. http://dx.doi.org/10.3390/molecules25020280.

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A type of molecular-imprinted polymer with magnetic molybdenum disulfide as a base and deep eutectic solvent as a functional monomer (Fe3O4@MoS2@DES-MIP) was prepared with surface molecular imprinting method. It was applied as the adsorbent for the selective recognition and separation of (+)-catechin, (−)-epicatechin, (−)-epigallocatechin, (−)-epicatechin gallate, and (−)-epigallocatechin gallate in green tea in the process of magnetic solid-phase extraction (MSPE) combined with high-performance liquid chromatography (HPLC). The structure of Fe3O4@MoS2@DES-MIP was characterized by Fourier transform infrared spectroscopy and field emission scanning electron microscopy. The adsorption properties and selective recognition ability on (−)-epigallocatechin gallate and the other four structural analogues were examined and compared. The results show that the polymer has excellent selective recognition ability for (−)-epigallocatechin gallate, and its adsorption capacity was much higher than that of structural analogues. The Fe3O4@MoS2@DES-MIP not only has the special recognition ability to template a molecule, but also can be separated by magnets with high separation efficiency and can be used in MSPE.

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18

Ali, Bagh, Rizwan Ali Naqvi, Dildar Hussain, Omar M. Aldossary, and Sajjad Hussain. "Magnetic Rotating Flow of a Hybrid Nano-Materials Ag-MoS2 and Go-MoS2 in C2H6O2-H2O Hybrid Base Fluid over an Extending Surface Involving Activation Energy: FE Simulation." Mathematics 8, no. 10 (October 9, 2020): 1730. http://dx.doi.org/10.3390/math8101730.

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Numeric simulations are performed for a comparative study of magnetohydrodynamic (MHD) rotational flow of hybrid nanofluids (MoS2-Ag/ethyleneglycol-water (50–50%) and MoS2-Go/ethyleneglycol-water (50–50%)) over a horizontally elongated plane sheet. The principal objective is concerned with the enhancement of thermal transportation. The three-dimensional formulation governing the conservation of mass, momentum, energy, and concentration is transmuted into two-dimensional partial differentiation by employing similarity transforms. The resulting set of equations (PDEs) is then solved by variational finite element procedure coded in Matlab script. An intensive computational run is carried out for suitable ranges of the particular quantities of influence. The primary velocity component decreases monotonically and the magnitude of secondary velocity component diminishes significantly when magnetic parameter, rotational parameter, and unsteadiness parameter are incremented. Both the primary and secondary velocities are smaller in values for the hybrid phase Ag-MoS2 than that of hybrid phase Go-MoS2 but the nanoparticle concentration and temperature are higher for hybrid phase Ag-MoS2. The increased values of parameters for thermophoresis, Brownian motion, shape factor, and volume fraction of ϕ2 made significant improvement in the temperature of the two phases of nano liquids. Results are also computed for the coefficients of skin friction(x, y-directions), Nusselt number, and Sherwood number. The present findings manifest reasonable comparison to their existing counterparts. Some of the practical engineering applications of the present analysis may be found in high-temperature nanomaterial processing technology, crystal growing, extrusion processes, manufacturing and rolling of polymer sheets, academic research, lubrication processes, and polymer industry.

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19

Park, Sung Jae, Dongil Chu, and Eun Kyu Kim. "Controllable Growth of Single Layer MoS2 and Resistance Switching Effect in Polymer/MoS2 Structure." Applied Science and Convergence Technology 26, no. 5 (September 30, 2017): 129–32. http://dx.doi.org/10.5757/asct.2017.26.5.129.

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20

Tang, Yuechao, Xurui Zhang, Phillip Choi, Rogerio Manica, Qingxia Liu, and Zhenghe Xu. "Single-Molecule MoS2–Polymer Interaction and Efficient Aqueous Exfoliation of MoS2 into Single Layer." Journal of Physical Chemistry C 122, no. 15 (March 27, 2018): 8262–69. http://dx.doi.org/10.1021/acs.jpcc.7b12194.

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21

Ji, Yingxin, Keyi Wang, and Gang Zhao. "Bioinspired Artificial Muscles Based on Sodium Alginate-Wrapped Multi-Walled Carbon Nanotubes and Molybdenum Disulfide Composite Electrode Membrane." Polymers 15, no. 17 (August 25, 2023): 3535. http://dx.doi.org/10.3390/polym15173535.

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Using a naturally extracted polymer sodium alginate extracted from natural seaweed as the primary raw material, we have successfully developed an electroactive actuator known as biomimetic artificial muscle (BMAM). In comparison to conventional synthetic materials, this BMAM aligns more coherently with the prevailing principles of environmentally friendly development. During the preparation of the BMAM electrode membrane, we employed ultrasonic oscillation to adsorb varying quantities of MoS2 onto a reticulated structure formed by multi-walled carbon nanotubes (MWCNTs), thus enhancing the mechanical and electrochemical performance of the BMAM. Scanning electron microscopy and energy-dispersive X-ray spectroscopy (EDS) confirmed the successful encapsulation of MoS2 by the MWCNTs network in the composite. To measure the output force of the BMAM fabricated with different masses of MoS2 doping, we established a self-built experimental platform and conducted tests on the electrode membranes doped with varying quantities of MoS2 using an electrochemical workstation. The results revealed that the BMAM exhibited optimal mechanical performance when doped with 1.5 g of MoS2, with a maximum output force of 7.81 mN, an output force density of 34.36 mN/g, and a response rate of 0.09 mN/s. These performances were improved by 309%, 276%, and 175%, respectively, compared to the samples without MoS2 doping, with a mass-specific capacitance enhancement of 151%.

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22

Ju, Liying, Dunhua Hong, Xing Jin, Hongxian Liu, Xiude Yang, Liying Nie, Qibin Liu, et al. "Preparation and Study of Photocatalytic Properties of (M(M=Pt, Ag and Au)-TiO2)@MoS2 Nanocomposites." Inorganics 11, no. 6 (June 15, 2023): 258. http://dx.doi.org/10.3390/inorganics11060258.

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There have been many articles on the degradation of pollutants by binary and ternary nanocomposites in the field of photocatalysis. However, there has been no research comparing the photocatalytic performance of Rhodamine B (Rh B) between (M(M=Pt, Ag and Au)-TiO2)@MoS2 nanocomposites and binary nanocomposites. To this end, we prepared and studied (M(M=Pt, Ag and Au)-TiO2)@MoS2 nanocomposites and compared their photocatalytic degradation efficiency with binary composites and parent materials for Rhodamine B. We concluded that the best ternary polymer nanocomposite for degrading Rhodamine B is (Pt(5 wt%)-TiO2(15 wt%))@MoS2. In this work, a series of MoS2, TiO2@MoS2, and (M(M=Pt, Ag and Au)-TiO2)@MoS2 nanocomposites with various compositions were synthesized by the hydrothermal and deposition–precipitation methods, and their photocatalytic characteristics were studied in depth using X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS) photoluminescence spectra (PL), FTIR spectra, UV–Vis DRS spectra, and BET analyzer. The results confirmed that TiO2 and M(Pt, Ag and Au) nanoparticles (NPs) were evenly distributed on MoS2 nanosheets (NSs) to form (M(M=Pt, Ag and Au)-TiO2)@MoS2 nanocomposite heterojunction. The UV–Vis absorption spectrum test results indicated that (Pt(5 wt%)-TiO2(15 wt%))@MoS2 ternary heterojunction nanocomposites exhibited the highest photocatalysis activity, with the maximum value of 99.0% compared to 93% for TiO2(15 wt%)@MoS2, 96.5% for (Ag(5 wt%)-TiO2(15 wt%))@MoS2, and 97.8% for (Au(5 wt%)-TiO2(15 wt%))@MoS2 within 9 min. The advanced structure of (Pt-TiO2)@MoS2 improved both light harvesting and electron transfer in the photocatalytic composites, contributing to remarkable catalytic effectiveness and extended durability for the photodegradation of Rhodamine B (Rh B). In-depth discussions of the potential growth and photocatalytic mechanism, which will help improve the energy and environmental fields, are included.

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23

Feng, Xiaming, Panyue Wen, Yuan Cheng, Lu Liu, Qilong Tai, Yuan Hu, and Kim Meow Liew. "Defect-free MoS2 nanosheets: Advanced nanofillers for polymer nanocomposites." Composites Part A: Applied Science and Manufacturing 81 (February 2016): 61–68. http://dx.doi.org/10.1016/j.compositesa.2015.11.002.

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24

Ali, Mariam K., and A. A. Moneim. "Investigation of Thermoelectric Performance of MoS₂-Templated Polyaniline Nanocomposites." Key Engineering Materials 821 (September 2019): 103–10. http://dx.doi.org/10.4028/www.scientific.net/kem.821.103.

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Polyaniline has attracted a lot of attention for thermoelectric (T.E) applications, however their drawback materials is that they possess low power factors than the state-of-the-art materials such as BiTe-based, BiSb-based, PbTe-based, etc. [1-4]. Currently, in order to enhance the T.E properties, hybrids between the polymer and other components such as carbon materials, other polymers, and even inorganic materials are being investigated. In this work, the effect of MoS2 addition on the T.E properties of polyaniline was investigated. The MoS2 nanoflowers were first synthesized via hydrothermal process at 200 °C for 24 hrs after which they were used for templated in situ polymerization of polyaniline. The scanning electron microscope (SEM) image showed that the MoS2 nanoflowers were covered with the polyaniline during the polymerization process and this was confirmed from the X-ray diffraction (XRD) analysis which showed existence of both the polyaniline and MoS2 in the synthesized material. The electrical conductivity of polyaniline was reported to be 10-3 S cm-1 and it was noticed that addition of minute amounts of MoS2 into polyaniline resulted in an enhancement of the electrical conductivities of up to two orders of magnitude. Nanocomposite with 5 % MoS2 (PMX-5) showed optimized power factor values ranging from 6.30 x 10-2 - 1.12 x 10-3 μW m-1 K-2 for the temperature range studied. This study therefore provides a facile approach for synthesis of polyaniline-molybdenum disulphide nanocomposites and the results obtained confirm that transition metal dichalcogenides (TMDs) have a potential for the enhancement of T.E properties of polyaniline.

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25

Zhen, Jinming, Yunxiang Han, Huabao Wang, Zhenguo Jiang, Li Wang, Yuqiang Huang, Zhengfeng Jia, and Ran Zhang. "High Temperature Friction and Wear Behavior of PTFE/MoS2 Composites." Lubricants 11, no. 8 (July 25, 2023): 312. http://dx.doi.org/10.3390/lubricants11080312.

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High performance polymer matrix composites with low friction and wear rate are of urgent requirement in sliding bearings and gaskets. In this study, the PTFE/MoS2 composites were prepared and the effect of testing temperature on the tribological properties were investigated. Results show that the friction coefficient and wear rate are approximately (0.14–0.19) and (4.18–13.38 × 10−4 mm3/Nm) at testing temperatures from 25 to 250 °C, respectively. At testing temperatures above 200 °C, the coefficient of friction of the composite with the addition of MoS2 is lower than that of pure PTFE, while the wear rate of the composite material with the addition of 2 wt.% and 5 wt.% MoS2 is lower than that of pure PTFE at temperatures above 150 °C. At low testing temperatures (25–100 °C), the main wear mechanism is that of slight abrasive wear, while from 150 °C to 250 °C, the main wear mechanism transformed to fatigue and severe abrasive wear.

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Han, Weijia, Siwei Luo, Dirk Bröker, Norbert Vennemann, Markus Haase, Georg S. Duesberg, and Martin Steinhart. "Slippery polymer monoliths: Surface functionalization with ordered MoS2 microparticle arrays." Colloids and Surfaces A: Physicochemical and Engineering Aspects 617 (May 2021): 126363. http://dx.doi.org/10.1016/j.colsurfa.2021.126363.

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Fan, Xiaoming, Farhad Khosravi, Vahid Rahneshin, Mariyappan Shanmugam, Masoud Loeian, Jacek Jasinski, Robert W. Cohn, Eugene Terentjev, and Balaji Panchapakesan. "MoS2actuators: reversible mechanical responses of MoS2-polymer nanocomposites to photons." Nanotechnology 26, no. 26 (June 9, 2015): 261001. http://dx.doi.org/10.1088/0957-4484/26/26/261001.

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Petoukhoff, Christopher E., Sofiia Kosar, Manami Goto, Ibrahim Bozkurt, Manish Chhowalla, and Keshav M. Dani. "Charge transfer dynamics in conjugated polymer/MoS2 organic/2D heterojunctions." Molecular Systems Design & Engineering 4, no. 4 (2019): 929–38. http://dx.doi.org/10.1039/c9me00019d.

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Ray, Rajeev, Abdus Salam Sarkar, and Suman Kalyan Pal. "Improving carrier transport in polymer films by incorporating MoS2 nanosheets." Journal of Physics D: Applied Physics 53, no. 27 (May 13, 2020): 275109. http://dx.doi.org/10.1088/1361-6463/ab83c5.

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Bian, Hang, Xuejian Zhang, Dexin Huang, and Ning Zhang. "Selective modification of two-dimensional MoS2 nanosheets by polymer grafting." Chinese Chemical Letters 30, no. 2 (February 2019): 311–13. http://dx.doi.org/10.1016/j.cclet.2018.07.002.

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Zalaznik, M., S. Novak, M. Huskić, and M. Kalin. "Tribological behaviour of a PEEK polymer containing solid MoS2 lubricants." Lubrication Science 28, no. 1 (May 1, 2015): 27–42. http://dx.doi.org/10.1002/ls.1299.

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Müller, Camila, Franco Leonardo Redondo, Mariana Dennehy, Andrés Eduardo Ciolino, and Walter Roberto Tuckart. "Bismuth (III) sulfide as additive: towards better lubricity without toxicity." Industrial Lubrication and Tribology 70, no. 2 (March 12, 2018): 347–52. http://dx.doi.org/10.1108/ilt-03-2017-0051.

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Purpose The purpose of this study is to design a fluid formulation with good lubricant properties by using an environmentally friendly additive for: high and low contact pressure conditions and steel/steel and polymer/steel systems. Design/methodology/approach Bismuth (III) sulfide (Bi2S3, “green chemistry” synthesis) is added to a commercial vinyl-terminated silicone fluid (PDMS-Vi) to obtain different weight-per cent mixtures. Tribological performance of formulations is studied from Reichert’s tests (steel/steel system) and block on ring tests (polymer/steel). The results are compared with formulations prepared with commercial bismuth (III) sulfide (Bi2S3), molybdenum (IV) sulfide (MoS2) and graphite. Findings An orthorhombic crystal lattice (XRD ) and a high-purity product (XRF) are evidenced for synthesized Bi2S3. Lubricant properties increase when the weight-per cent of the synthesized Bi2S3 increases in formulations. The wear area decreases up to 90 per cent according to Reichert’s tests. The synthesized Bi2S3 shows a better tribological behavior when compared to commercial Bi2S3, MoS2 and graphite. Originality/value Replacement of lead derivatives by an environmentally friendly lubricant in extreme pressure (EP) formulations and excellent performance compared to commercially used additives are achieved.

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Ma, Jiyeon, Keun-Yeong Choi, So Hyeon Kim, Hojin Lee, and Geonwook Yoo. "All polymer encapsulated, highly-sensitive MoS2 phototransistors on flexible PAR substrate." Applied Physics Letters 113, no. 1 (July 2, 2018): 013102. http://dx.doi.org/10.1063/1.5036556.

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Zhao, Yuhang, Biao Liu, Junliang Yang, Jun He, and Jie Jiang. "Polymer-Decorated 2D MoS2 Synaptic Transistors for Biological Bipolar Metaplasticities Emulation." Chinese Physics Letters 37, no. 8 (August 2020): 088501. http://dx.doi.org/10.1088/0256-307x/37/8/088501.

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Guo, Junjie, Jie Jiang, Zhouming Zheng, and Bingchu Yang. "Enhanced performance of multilayer MoS2 transistor employing a polymer capping layer." Organic Electronics 40 (January 2017): 75–78. http://dx.doi.org/10.1016/j.orgel.2016.10.043.

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Kesavan, Arul Varman, Arun D. Rao, and Praveen C. Ramamurthy. "Optical and electronic property tailoring by MoS2-polymer hybrid solar cell." Organic Electronics 48 (September 2017): 138–46. http://dx.doi.org/10.1016/j.orgel.2017.05.027.

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37

Park, Chan Ho, Taewan Kim, Gun Ho Lee, Kang Hee Ku, Shin-Hyun Kim, and Bumjoon J. Kim. "Fluorescent Polymer-MoS2-Embedded Microgels for Photothermal Heating and Colorimetric Monitoring." ACS Applied Materials & Interfaces 12, no. 31 (July 14, 2020): 35415–23. http://dx.doi.org/10.1021/acsami.0c08125.

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Zhou, Keqing, Jiajia Liu, Wenru Zeng, Yuan Hu, and Zhou Gui. "In situ synthesis, morphology, and fundamental properties of polymer/MoS2 nanocomposites." Composites Science and Technology 107 (February 2015): 120–28. http://dx.doi.org/10.1016/j.compscitech.2014.11.017.

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39

Panin, Sergey V., Jiangkun Luo, Dmitry G. Buslovich, Vladislav O. Alexenko, Lyudmila A. Kornienko, Anton V. Byakov, Vitaly N. Paimushin, and Artur R. Shugurov. "Role of Testing Conditions in Formation of Tribological Layers at Line Contacts of Antifriction CF-Reinforced PI- and PEI-Based Composites." Molecules 27, no. 19 (September 27, 2022): 6376. http://dx.doi.org/10.3390/molecules27196376.

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High-strength PI and PEI polymers differ by chemical structure and flexibility of the polymer chains that ensure lower cost and higher manufacturability of the latter. The choice of a particular polymer matrix is of actuality at design of antifriction composites on their basis. In this study, a comparative analysis of tribological behavior of PI and PEI- based composites was carried out with linear contact rubbing. The neat materials, as well as the two- and three-component composites reinforced with chopped carbon fibers, were investigated. The third components were typically used, but were different in nature (polymeric and crystalline) being solid lubricant fillers (PTFE, graphite and MoS2) with characteristic dimensions of several microns. The variable parameters were both load and sliding speed, as well as the counterface material. It was shown that an improvement of the tribological properties could be achieved by the tribological layer formation, which protected their wear track surfaces from the cutting and plowing effects of asperities on the surfaces of the metal and ceramic counterparts. The tribological layers were not formed in both neat polymers, while disperse hardening by fractured CF was responsible for the tribological layer formation in both two- and three component PI- and PEI-based composites. The effect of polymer matrix in tribological behavior was mostly evident in two-component composites (PI/CF, PEI/CF) over the entire P⋅V product range, while extra loading with Gr and MoS2 leveled the regularities of tribological layer formation, as well as the time variation in friction coefficients.

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Panin, Sergey V., Jiangkun Luo, Dmitry G. Buslovich, Vladislav O. Alexenko, Lyudmila A. Kornienko, Svetlana A. Bochkareva, and Anton V. Byakov. "Experimental—FEM Study on Effect of Tribological Load Conditions on Wear Resistance of Three-Component High-Strength Solid-Lubricant PI-Based Composites." Polymers 13, no. 16 (August 23, 2021): 2837. http://dx.doi.org/10.3390/polym13162837.

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The structure, mechanical and tribological properties of the polyimide-based composites reinforced with chopped carbon fibers (CCF) and loaded with solid-lubricant commercially available fillers of various natures were investigated. The metal- and ceramic counterparts were employed for tribological testing. Micron sized powders of PTFE, colloidal graphite and molybdenum disulfide were used for solid lubrication. It was shown that elastic modulus was enhanced by up to 2.5 times, while ultimate tensile strength was increased by up 1.5 times. The scheme and tribological loading conditions exerted the great effect on wear resistance of the composites. In the tribological tests by the ‘pin-on-disk’ scheme, wear rate decreased down to ~290 times for the metal-polymer tribological contact and to ~285 times for the ceramic-polymer one (compared to those for neat PI). In the tribological tests against the rougher counterpart (Ra~0.2 μm, the ‘block-on-ring’ scheme) three-component composites with both graphite and MoS2 exhibited high wear resistance. Under the “block-on-ring” scheme, the possibility of the transfer film formation was minimized, since the large-area counterpart slid against the ‘non-renewable’ surface of the polymer composite (at a ‘shortage’ of solid lubricant particles). On the other hand, graphite and MoS2 particles served as reinforcing inclusions. Finally, numerical simulation of the tribological test according to the ‘block-on-ring’ scheme was carried out. Within the framework of the implemented model, the counterpart roughness level exerted the significantly greater effect on wear rate in contrast to the porosity.

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Hetier, Valentin, Diego Pena, Alexandre Carvalho, Laurence Courthéoux, Valérie Flaud, Etienne Girard, Denis Uzio, Sylvette Brunet, Patrick Lacroix-Desmazes, and Annie Pradel. "Influence of Pluronic® P123 Addition in the Synthesis of Bulk Ni Promoted MoS2 Catalyst. Application to the Selective Hydrodesulfurization of Sulfur Model Molecules Representative of FCC Gasoline." Catalysts 9, no. 10 (September 23, 2019): 793. http://dx.doi.org/10.3390/catal9100793.

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A way to improve hydrotreatment processes is to enhance the intrinsic activity of Ni or Co promoted MoS2 catalysts that are commonly used in such reactions. The aim of this work was to investigate the impact of the presence of Pluronic® P123 as a structuring agent during the synthesis of Ni promoted MoS2 catalysts (named NiMoS) in water at room temperature. A series of analyses, i.e., X-ray diffraction (XRD), chemical analysis, inductively coupled plasma mass spectrometry (ICP-MS), nitrogen adsorption-desorption isotherms, transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS), helped in characterizing the NiMoS-P123 and NiMoS catalysts, the latter being prepared in the absence of polymer. Both compounds contained MoS2 phase (~85 atomic% considering Mo atoms), a similar amount of mixed Ni-Mo-S phase (40–50% considering Ni) and some amount of NiS and Ni-oxidized impurity phases. The main differences between the two catalysts were a much larger specific surface area (126 m2·g−1 instead of 31 m²·g−1) and a better dispersion of the active phase as shown by the lower slab stacking (2.7 instead of 4.8) for NiMoS-P123, and the presence of C in NiMoS-P123 (9.4 wt.% instead of 0.6 wt.%), indicating an incomplete decomposition of the polymer during thermal treatment. Thanks to its larger specific surface area and lower slab stacking and therefore modification of active Mo site properties, the compound prepared in the presence of Pluronic® P123 exhibits a strong increase of the catalytic activity expressed per Mo atom for the transformation of 3-methylthiophene. Such improvement in catalytic activity was not observed for the transformation of benzothiophene likely due to poisonous residual carbon which results from the presence of Pluronic® P123 during the synthesis.

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42

Panin, S. V., J. Lou, D. G. Buslovich, V. O. Alexenko, and L. A. Kornienko. "Efect of matrix structure on the tribological properties of solid-lubricant composites based on high-temperature polyimide thermoplastics." Izvestiya vysshikh uchebnykh zavedenii. Fizika, no. 3 (2022): 123–30. http://dx.doi.org/10.17223/00213411/65/3/123.

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The structure, mechanical and tribological properties of polyimide (PI) and polyetherimide (PEI) based composites, which differ by the presence of "hinged" oxygen atoms in the polymer’s molecular chain have been studied. The composites were reinforced with chopped carbon fibers and simultaneously loaded with organic (PTFE) and inorganic (MoS2) solid lubricant fillers. Tribological tests were carried out according to the «ball-on-disk» scheme under dry sliding friction on a ceramic counterface in the temperature range of T = 23-180 °C. It has been shown that only the «PEI/10% CF/10% PTFE» composite possesses the highest wear resistance in the entire temperature range studied. At the same time, the loading with PTFE particles ensured the formation and adhering of a stable layer of secondary structures (transfer film layer) on the sliding surface of the polymer composite. Changes in wear intensity and friction coefficient correlated well with each other. When the MoS2 solid lubricant filler were loaded, the transfer film was fixed on the sliding surface of the composite only at the highest testing temperature T = 180 °C. This was ensured by the presence of oxygen atoms in the PEI molecules. In so doing, formation of the transfer film layer gave rise to low coefficient of friction and relatively high wear resistance of the «PEI/10 CF/10 MoS2» ternary composite. A comparative analysis of the tribological properties of two types of polymer matrices have shown that the wear rate of PEI based composites loaded with PTFE was identically low at T = 23°C and 120°C, while at T = 180°C it was 300 times lower in contrast to PI-based ones. We suggest that this was related to the more «rigid» nature of the PI matrix (which does not contain «hinged» units in the macromolecule). Under conditions of a high and oscillating friction coefficient, the PI matrix was not capable of adhering a solid lubricant PTFE-containing transfer films layer. The PEI-based composites are recommended for use in tribounits due to both high manufacturability (processability) governed by the flexibility of the polymer chain, and high wear resistance due to the formation of stable secondary structures on sliding surfaces in the temperature range T = 23-180 °C.

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43

Zhang, He-xin, Byeong-Gwang Shin, Dong-Eun Lee, and Keun-Byoung Yoon. "Preparation of PP/2D-Nanosheet Composites Using MoS2/MgCl2- and BN/MgCl2-Bisupported Ziegler–Natta Catalysts." Catalysts 10, no. 6 (May 27, 2020): 596. http://dx.doi.org/10.3390/catal10060596.

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Polypropylene/molybdenum disulfied (PP/MoS2) and Polypropylene/hexagonal boron nitride (PP/hBN) nanocomposites with varying concentration (0–6 wt %) were fabricated via in situ polymerization using two-dimensional (2D)-nanosheet/MgCl2-supported Ti-based Ziegler–Natta catalysts, which was prepared through a novel coagglomeration method. For catalyst preparation and interfacial interaction, MoS2 and hBN were modified with octadecylamine (ODA) and octyltriethoxysilane (OTES), respectively. Compared with those of pristine PP, thermal stability of composites was 70 °C higher and also tensile strength and Young’s modulus of the composites were up to 35% and 60% higher (even at small filler contents), respectively. The alkyl-modified 2D nanofillers were characterized by strong interfacial interactions between the nanofiller and the polymer matrix. The coagglomeration method employed in this work allows easy introduction and content manipulation of various 2D-nanosheets for the preparation of 2D-nanosheet/MgCl2-supported Ti-based Ziegler–Natta catalysts.

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44

Li, Yinta, Chunyan Tang, Lang Yang, Yongjun Sun, and Wenming Ju. "Integrated Roles of MoS2 Nanosheets for Water Treatment and Polymer Flame Retardant." Arabian Journal for Science and Engineering 46, no. 7 (February 17, 2021): 6753–63. http://dx.doi.org/10.1007/s13369-021-05424-x.

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45

Woo, Gunhoo, Hyeong-U. Kim, Hocheon Yoo, and Taesung Kim. "Recyclable free-polymer transfer of nano-grain MoS2 film onto arbitrary substrates." Nanotechnology 32, no. 4 (October 28, 2020): 045702. http://dx.doi.org/10.1088/1361-6528/abbcea.

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46

Liu, Lan, Xudong Wang, Li Han, Bobo Tian, Yan Chen, Guangjian Wu, Dan Li, et al. "Electrical characterization of MoS2 field-effect transistors with different dielectric polymer gate." AIP Advances 7, no. 6 (June 2017): 065121. http://dx.doi.org/10.1063/1.4991843.

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47

Zhao, Min, Meng-Jie Chang, Qiang Wang, Zhen-Tong Zhu, Xin-Ping Zhai, Mohammad Zirak, Alireza Z. Moshfegh, Ying-Lin Song, and Hao-Li Zhang. "Unexpected optical limiting properties from MoS2 nanosheets modified by a semiconductive polymer." Chemical Communications 51, no. 61 (2015): 12262–65. http://dx.doi.org/10.1039/c5cc01819f.

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We have developed a facile method for exfoliation of MoS₂ with the assistance of P3HT to synthetize a P3HT–MoS₂ nanohybrid which shows unexpected optical limiting properties compared with the individual compartments.

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48

Chen, Yan, Xudong Wang, Peng Wang, Hai Huang, Guangjian Wu, Bobo Tian, Zhenchen Hong, et al. "Optoelectronic Properties of Few-Layer MoS2 FET Gated by Ferroelectric Relaxor Polymer." ACS Applied Materials & Interfaces 8, no. 47 (November 15, 2016): 32083–88. http://dx.doi.org/10.1021/acsami.6b10206.

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49

Zeng, Guangjian, Meiying Liu, Xinhua Liu, Qiang Huang, Dazhuang Xu, Liucheng Mao, Hongye Huang, Fengjie Deng, Xiaoyong Zhang, and Yen Wei. "Mussel inspired preparation of MoS2 based polymer nanocomposites: The case of polyPEGMA." Applied Surface Science 387 (November 2016): 399–405. http://dx.doi.org/10.1016/j.apsusc.2016.05.093.

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50

Jiang, Huiling, Yilin Du, Leilei Chen, Min Qian, Yafeng Yang, Taotao Huo, Xueying Yan, et al. "Multimodal theranostics augmented by transmembrane polymer-sealed nano-enzymatic porous MoS2 nanoflowers." International Journal of Pharmaceutics 586 (August 2020): 119606. http://dx.doi.org/10.1016/j.ijpharm.2020.119606.

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