A quat-silicone micro-emulsion (particle size <40 nm), an amino-silicone macro-emulsion (110 nm), and an alkyl modified silicone macro-emulsion (740 nm) were used to modify Scots pine (Pinus sylvestris L.) sapwood. Treated and uncoated boards were exposed to natural weathering for one year along with water treated controls according to EN 927-3. The treatment with silicone emulsions did not enh...

OBJECTIVE The purpose of this study is to report a case of full-arch rehabilitation on six endosseous implants loaded following the standard procedure. METHODS An implant-prosthetic treatment was proposed to a 53-year-old woman with a total prosthesis in the upper jaw. Six implants on upper maxillary were placed keeping the upper complete denture during the osseointegration period. The implan...

This manuscript describes the use of explosions to power a soft robot—one composed solely of organic elastomers (e.g., silicones). The robot has three pneumatic actuators (pneu-nets) in a tripedal configuration. Explosion of a stoichiometric mixture of methane and oxygen within the microchannels making up the actuators produced hot gas that rapidly inflated the pneu-nets, and caused the robot t...

Thermal interface materials (TIMs) are ubiquitous in electronics cooling a wide variety of applications Industrial, Automotive and Consumer electronics. TIMs comprise compliant polymeric matrix with thermally conductive fillers. Silicones the polymer first choice due to special characteristics thermal stability ability fine tune modulus across range. Silicone migration can be concern, whether r...

with 'H nuclear magnetic resonance (NMR) technique using an internal control (5). Blood samples from animals given feed without siloxanes showed no signals originating from the silicones tested. In all blood samples from animals given feed with siloxanes, they were detected. In samples from animals given feed with PDMS, the mean concentration (± standard deviation) of siloxanes of 26 ± 14 pg/cm...

A new decomposition method for structural analysis of polysiloxanes (silicones) was developed using methyl orthoformate. The siloxane bonds in samples with vinyl and/or methyl side groups decomposed under relatively mild acidic conditions up to around 70°C and were followed by methoxylation at the cleaved linkages with few side reactions. The product yields with respect to the siloxane monomer ...

Introduction: Polyurethanes (PU) have long been used for biomedical applications due to their excellent mechanical properties and reasonable biocompatibility. However, polyether urethane elastomers are susceptible to biodegradation. Silicones are known to be biostable and biocompatible, making them an ideal replacement for the polyether soft segment of polyurethanes. As a result, a new silicone...

Rhodium(III) complexes comprising monoanionic C,C,C-tridentate dicarbene ligands activate Si-H bonds and catalyse the hydrolysis of hydrosilanes to form silanols and siloxanes with concomitant release of H(2). In dry MeNO(2), selective formation of siloxanes takes place, while changing conditions to wet THF produces silanols exclusively. Silyl ethers are formed when ROH is used as substrate, th...

Aim: To evaluate the effects of handling with different type gloves on setting time, compressive and tensile strength putty-type silicone impression materials. Methodology: The study was conducted at COMSATS Lahore approved by IRB FMH College Medicine Dentistry. In this in-vitro three (Polythene, Latex Vinyl) two brands each addition (Flexceed Elite P&amp;P) condensation (Zetaplus Cavex) materi...