Improvement of mechanical-antibacterial performances of AR/PMMA with TiO2 and HPQM treated by N-2(aminoethyl)-3-aminopropyl trimethoxysilane

© The Author(s) 2020. The mechanical and antibacterial properties of acrylic rubber/poly(methyl methacrylate) (AR/PMMA) blend at 10 to 50 wt% of AR content with non-treated and treated titanium dioxide (TiO2) and 2-Hydroxypropyl-3-piperazinyl-quinoline carboxylic acid methacrylate (HPQM) by N-2(aminoethyl)-3-aminopropyl trimethoxysilane were studied. The antibacterial property against Escherichia coli was evaluated. The results found that the mechanical properties of ARt-TiO2/PMMA and ARt-HPQM/PMMA blend were higher than that of the ARTiO2/PMMA and ARHPQM/PMMA blend. For antibacterial property, the ARHPQM/PMMA and ARt-HPQM/PMMA blend could act as the antibacterial material, while the ARTiO2/PMMA blend did not show. However, the ARt-TiO2/PMMA blend could inhibit bacterial cell growth with 10 to 30 wt% of AR content. The recommended compositions of ARt-TiO2/PMMA blend, which improved both mechanical and antibacterial properties, were 10 to 30 wt% of AR and were 10 to 50 wt% of AR for ARt-HPQM/PMMA. Moreover, the UV radiation increased the antibacterial properties by the destruction of the interaction in treated TiO2 and HPQM and improved the antibacterial performance of ARt-TiO2/PMMA and ARt-HPQM/PMMA blend

Wear of rubbers and its control in conveyer belt system

Rubbers are polymer materials characterized by the ability of reversible deformation under influence of external deformation forces, described as a material with elastic properties. Rubbers include natural rubber, naturally occurring substance and synthetic rubber, artificially derived from petrochemical product. Products made from rubber have flexible and stable 3-dimensional chemical structure and the ability to stretch repeatedly of about twice the original length and return to original length. These materials are enormously used in conveyer belt system. Today, rubber materials are altered with approximately 60% synthetic polymers to achieve desired properties of final product. This chapter investigates the wear of different types of rubbers against ceramic liners which is the most realistic case in mining industries, where conveyor belts are used for ore transportation pulleys in conveyer belt system are coated with sacrificial liners of ceramics and rubbers to prolong the life of the conveyor system. However, such pulley liners are exposed to wear and even chemical reactions particularly in mining industries that are involved in transporting ores. The investigation will provide information on surface in terms of wear mechanism of rubber against ceramics, wear rate and appearance of wear surfaces.Dilip Thapa Masrangi, Hadinata Salim, F. Hakami, A. Pramanik, and A. K. Basa