توصيفگر ها :
الاستومر , اندام مصنوعي , پروتز , نانوكامپوزيت , خواص مكانيكي , مقاومت پارگي , زيست سازگاري
چكيده انگليسي :
One of the needs that patients, disabled people, or people with organ damage have been interested in for a long time, is replacement organs for their natural organs, which can include hands, feet, noses, earlobes, or other organs. The progress of science in the direction of making composite prostheses has been able to reduce the pain and suffering caused by limb defects. For this reason, composite prostheses have been made for this purpose. At present, one of the most widely used materials used in the manufacture of artificial limb prostheses is silicone, which, while having suitable properties such as flexibility and biocompatibility, has created many problems for consumers. Silicone prostheses do not have the resistance that people are satisfied with, and at the same time, they have a lot of density, which is very annoying and tiring, especially in prostheses used in the hand. Also, according to the research, most of the prosthetic organs do not have antibacterial properties or proper hydrophilicity to create comfort for people regarding sweating. Among the issues raised regarding the current silicone gloves is the loss of mechanical properties or premature rupture of the prosthetic limbs, which, in addition to the heaviness of the limb, also brings exorbitant costs for the target community. According to the field of research in this project, the construction and synthesis of elastomeric nanocomposites will be the main focus of the project regarding the prototyping and characterization of materials, with changes in the weight percentage of base phase polymers, alloying, and percentage of additives, as well as the manufacturing and dispersion method. Particles are optimized for their properties, as a result of which precise formulations are introduced for making organ prostheses. This research uses three silicone and 2 polyurethane grade elastomer resin polymers, and nanoclay, talc, TiO2, and fumed silica reinforcements with weight fraction of 0-1-2-4-5-6-8 were used in hybrid method. In this research, 13 types of tests were conducted in 4 branches of mechanical, thermal, biocompatibility, and structural characterization tests, including tensile strength, tear strength, hardness, densitometry, water contact angle, UV degradation, sweat degradation, DSC, pH sensitivity, antibacterial toxicity, cell culture toxicity (MTT), XRD, and FESEM are field publications. The superior samples presented acceptable mechanical, thermal, biocompatibility, and structural properties and can completely replace silicone samples and can practically be introduced as a new generation of artificial limb prostheses with advanced properties and capabilities.
