The aim of this investigation is to determine how different weight percentages of alumina nanoparticles, including 0.02, 0.04, and 0.06 percent wt, affect the physical characteristics of Poly Acrylamide (PAAM). Using a hot plate magnetic stirrer, 10 g of poly acrylamide powder was dissolved in 90 g of di-ionized distillate water for 4 hours to produce PAAM with a concentration of 0.11 g/ml. Four sections of the resulting solution, each with a volume of 20 ml, were created. Each solution was added independently with alumina nanoparticles in different ratios 0.0, 0.02, 0.04, and 0.06 to create four nano fluid solutions with different alumina nanoparticle contents based on each weight percent. The hand casting process for nanocomposites samples, which entailed pouring the prepared solution into an appropriate plastic mold, allowing it to cure for 24 hours, and then cutting the resulting thin film according to each test, was used to create the nano composited membranes. The tensile test was used to study tensile strength, Young's modulus, elongation, and toughness. Additionally, a test using Fourier transition infrared radiation (FTIR) was conducted to examine the chemical and physical connections between polyacrylamide and alumina nanoparticles. The morphology of the materials was examined using scan electron microscopy. The contact angles of samples were tested to limit the hydrophilicity behavior of these samples. To control the hydrophilicity behavior of these samples, the contact angles of the samples were evaluated. The results showed that including alumina nanoparticles into the PAAM matrix improves the mechanical characteristics of the resulting nanocomposites. Tensile strength increases from 1 GPa to 2.5 GPa with an increase in alumina nanoparticle content from 0 to 0.06 percent wt. For the same prior ratios, Young's modulus likewise increased, rising from 1.3 to 2 GPa. For the higher weight ratio of alumina nanoparticles (0.04 percent wt), toughness rises to 240 J/cm2. On the other hand, the addition of alumina nanoparticles increased the PAAM surface's contact angle from 55 degrees to 67 degrees, and it exhibited hydrophilic behavior
Nanotechnology applications have recently developed in the field of smart sensors that convert energy from one form to another. Nanotechnology is one important source to renewable energy applications, such as the use of solar energy to generate electrical energy A concentration of 0.2 w/v of poly methyl meta acrylic dissolved in dimethylformamide was prepared using hot plate magnetic stirrer magnetic with a temperature up to 50 ° C, and the mixing continued for an hour. 0.02 Percentage of magnesium oxide nanoparticles was added to (poly methyl methacrylate/dimethylformamide) solution and dispersed by ultrasonic dispersion device. The samples were cast into glass containers to obtain thin films with 0.02 mm diameter after drying for 24 hours.
Infrared assays were conducted to study the interactions between the polymer and the nanoparticles via studying the nature of the bonds. The differential scanning calorimetry test was performed to measure the thermal properties of the samples. Atomic force microscopy was used to study the surface properties of the samples. The energy gap of samples was calculated. The results proved that the interaction between polymer and nanoparticles is physical interaction. The differential thermal calorimeter results also showed that the adding of MgO nanoparticles leads to increase the glass transition temperature by a small value from (80 °C) to (82 °C). On the other hand, the softening point decreases from (132 ° C) to (120 ° C) and melting point decreases from (173 ° C) to (135 ° C) after adding nanoparticles.
As for the results of atomic force microscopy, it was proved that the surface roughness decreases from (2.08 nm) to (1.7 nm) after adding nanoparticles, while the bearing index increases from (0.369) to (0.582). Also, the results of the energy gap proved that the addition of nanoparticles leads to decrease in the energy gap from (4.3 – 4.1) eV, which leads to increase in electrical sensitivity.
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