Study of the properties of MgO/Poly methyl methacrylate Nano-composites

Abstract

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.

Assessment of the Antifungal Activity of PMMA-MgO and PMMA-Ag Nanocomposite

“…The above results could be linked to the antimicrobial traits of MgO-NPs in PMMA nanocomposite influencing the enhancement of surface properties in PMMA resin. For instance, the surface roughness decreased from 2.08 μm to 1.7 μm after the addition of MgO-NPs [48]. In addition, electrostatic interaction represents one of the mechanisms behind the antimicrobial impact of MgO-NPs.…”

تحضير وتوصيف فلتر نسيج نانوي لفصل خليط الزيت / الماء باستخدام خلائط البولي امايد/ بولي فينيل الكحول المسلحة بجسيمات الكربون النانوية

“…Nano-composite materials are important in protecting the environment from pollution. The properties of other engineering substances are significantly enhanced by the reinforcement of nanoparticles [1][2][3] . Since there have been several oil spill tragedies as well as rapid industrialization during oil production or transportation, which has resulted in significant loss and long-term damaging consequences on the environment, oil/water separation has become a research hotspot recently.…”

Nano composites of PAM Reinforced with Al2O3

“…The nanomaterials are added to the basic materials in order to enhance their properties and get additional qualities for the new nanocomposites materials that are produced. The addition of nanoparticles improved the mechanical, thermal, optical, and antibacterial properties of nanocomposites because dimensionality significantly influences material properties [1][2][3][4][5][6] Water-repellent or water-repellent qualities are how materials react to water [7][8] . In contrast to hydrophobic materials, which tend to reject water and have self-cleaning surfaces, hydrophilic materials tend to form hydrogen bonds with water and have a contact angle of less than 90 degrees [9][10] .…”