2.1 Polydimethylsiloxane (PDMS) Polydimethylsiloxane (PDMS) own to a group of polymeric organosilicon compounds that are commonly stated as silicones. PDMS is optically clear, and, in general, non-flammable, non-toxic, and inert. PDMS is viscoelastic, meaning that at long flow times (or high temperatures), it acts like a viscous liquid such as honey. However, at short flow times (or low temperatures), it acts like an elastic solid such as rubber.
In other words, PDMS will flow to cover the surface and mold any surface imperfections if it is left on a surface overnight (long flow time). Nevertheless, PDMS will bounce like a rubber ball if it is rolled into a sphere and thrown onto the same surface (short flow time).
2.1.1 The mechanical properties …show more content…
Their apatite-forming abilities in a simulated body fluid, which is indicative of bioactivity, increased with decreasing PDMS/(TEOS + TiPT). Their extensibility decreased and Young's modulus increased, respectively, with decreasing PDMS/(TEOS + TiPT). The hybrids with PDMS/(TEOS + TiPT) of about 30:70 in weight showed fairly high apatite-forming ability, high extensibilities, and Young's moduli almost equal to those of the human cancellous bones. These new kind of bioactive materials with unique mechanical properties may be useful as bone-repairing …show more content…
Light scattering is found as an important factor in the µSL of ceramics. In this work, the Monte Carlo ray tracing method is employed to investigate the influences of the important materials properties on the scattering during the ceramic µSL. The influences of critical physical properties of ceramic particles and UV-curable resins used in ceramic µSL are investigated through the developed numerical model. Light scattering is found to essentially influence the µSL of ceramics. It is found that the scattering is the strongest scattering occurs at a high refractive index contrast between the particle and the resin. High laser intensity is required to fabricate high UV absorption ceramic materials to compensate for the laser energy absorbed by the ceramic particles. µSL of three commercially available ceramics: silica, alumina and PZT, are examined by numerical model. The numerical modelling is demonstrated as an efficient method to predict the critical process parameter and the high precision ceramic µSL has been achieved
In other words, PDMS will flow to cover the surface and mold any surface imperfections if it is left on a surface overnight (long flow time). Nevertheless, PDMS will bounce like a rubber ball if it is rolled into a sphere and thrown onto the same surface (short flow time).
2.1.1 The mechanical properties …show more content…
Their apatite-forming abilities in a simulated body fluid, which is indicative of bioactivity, increased with decreasing PDMS/(TEOS + TiPT). Their extensibility decreased and Young's modulus increased, respectively, with decreasing PDMS/(TEOS + TiPT). The hybrids with PDMS/(TEOS + TiPT) of about 30:70 in weight showed fairly high apatite-forming ability, high extensibilities, and Young's moduli almost equal to those of the human cancellous bones. These new kind of bioactive materials with unique mechanical properties may be useful as bone-repairing …show more content…
Light scattering is found as an important factor in the µSL of ceramics. In this work, the Monte Carlo ray tracing method is employed to investigate the influences of the important materials properties on the scattering during the ceramic µSL. The influences of critical physical properties of ceramic particles and UV-curable resins used in ceramic µSL are investigated through the developed numerical model. Light scattering is found to essentially influence the µSL of ceramics. It is found that the scattering is the strongest scattering occurs at a high refractive index contrast between the particle and the resin. High laser intensity is required to fabricate high UV absorption ceramic materials to compensate for the laser energy absorbed by the ceramic particles. µSL of three commercially available ceramics: silica, alumina and PZT, are examined by numerical model. The numerical modelling is demonstrated as an efficient method to predict the critical process parameter and the high precision ceramic µSL has been achieved