Synthesis of 2D Molybdenum Disulfide (MoS2) for enhancement of mechanical and electrical properties of polystyrene (PS) polymer

Polyethylene with MoS2 nanoparticles toward antibacterial active packaging

“…In polymer nanocomposites, especially those based on polyolefins, the elastic modulus depended on the aspect ratio and mechanical properties of the agglomerates rather than the isolate particles, as concluded by analyzing micromechanical models 78 . In general, polymer/MoS 2 composites can present a drastic increase in the elastic modulus, as compared with the pure matrix, depending on the characteristic of the polymer, the processing method, polymer/particle interaction, and filler amount, the latter decreasing the property due to the filler agglomeration at high concentration 22–24,45 . The complexity of these variables explains the lack of a single tendency regarding the effect of the MoS 2 nanoparticles, as some polymer matrices did not present any change in the stiffness 19 .…”

“…In biopolymers, such as chitosan, MoS 2 improved both the thermal and mechanical properties of the matrix, confirming the reinforcement effect of these unique two‐dimensional (2D) structures 22 . The outstanding mechanical behavior of MoS 2 nanosheets allowed the design of polymer composites with improved stiffness and tensile strength, for instance, in poly(ethylene oxide) (PEO), PP, PE, and PS, even at low concentrations (lower than 0.9 wt% in some cases) with a low effect on the elongation at break in PEO and PE, or even increasing this value in PP and PS matrices 11,23–25 . Alongside the high effect of the filler concentration, the matrix characteristics are relevant as an increased toughness without relevant changes in stiffness was observed in PVA/MoS 2 composites, 19 while in hydroxypropyl methylcellulose, the tensile strength improved but the elongation at break decreased drastically 26…”

Enhancement in creep resistance of pristine polystyrene with incorporation of exfoliated 2D graphene nanosheets at low filler loading

“…The effective area of the sample was 5 × 1 cm 2, and deflection was measured with a dial gauge during this testing. 13 Three samples of each concentration were tested and all the results are based on the average values. A typical image of the undergone test is provided in Supporting Information Figure S1; Load-bearing time was recorded in intervals of 30 s because the deflection increased very abruptly at the initial creep stage and converted to smooth deflection after several seconds.…”

“…[4][5][6][7][8][9][10] Researchers working in polymeric nanocomposites have already made tremendous advances by introducing functional binders in nanocomposites to effectively utilise them for the benefit of society. [11][12][13][14][15] However, creep, a time-dependent fracture phenomenon that occurs due to molecular movement in the backbone of the base polymer structure, adversely affects the strength and other structural properties, hampering polymers' practical applications 16,17 in various engineering sectors. When the constant load is applied to the polymer, it experiences a time-dependent increase in strain, inclusively at room temperature; as a consequence, elastic/plastic deformation occurs, leading structure towards failure.…”

Stereolithography of Semiconductor Silver and Acrylic-Based Nanocomposites

“…In the present paper, we propose an approach to overcome such limitations, aiming to increase the density of Ag NPs by using an intermediate solvent to assist the salt dissolution, rendering higher amounts of precursor dispersed in the resin. Solvents like water, ethanol, methanol, and N,N -dimethylformamide (DMF) have been extensively used for the synthesis of PNCs in the literature, to dissolve and help in the dispersion of Ag NPs [ 15 , 16 , 26 , 27 , 28 , 29 ]. In particular, we evaluate the effect of using methanol and DMF to increase the amount of AgClO 4 that can be dispersed in an acrylic resin used in SLA, to improve the electrical conductivity of Ag nanocomposites.…”