scholarly journals Self-Lubricanting Slippery Surface with Wettability Gradients for Anti-Sticking of Electrosurgical Scalpel

Micromachines ◽  
2018 ◽  
Vol 9 (11) ◽  
pp. 591 ◽  
Author(s):  
Guang Liu ◽  
Pengfei Zhang ◽  
Yang Liu ◽  
Deyuan Zhang ◽  
Huawei Chen
Keyword(s):  
Soft Tissue ◽  
Adhesion Force ◽  
Silicone Oil ◽  
Liquid Lubricant ◽  
Self Assembling ◽  
Pillar Density ◽  
Different Temperatures ◽  
Slippery Surface ◽  
Dimethyl Silicone ◽  
Micro Pillars

Soft tissue sticking on electrosurgical scalpels in minimally invasive surgery can increase the difficulty of operation and easily lead to medical malpractice. It is significant to develop new methods for anti-sticking of soft tissue on electrosurgical scalpels. Based on the characteristics of biomimetic ultra-slippery surface, a self-lubricating slippery surface with wettability gradients on electrosurgical scalpel was designed and fabricated. Non-uniformly distributed cylindrical micro pillars, which constitute the wettability gradients, were prepared by an electrolytic etching process and the theoretic of the spontaneous liquid spreading process was analyzed. The silicophilic property of wettability gradients surface was modified by octadecyltrichlorosilane (OTS) self-assembling coat with biocompatible liquid lubricant dimethyl silicone oil. The contact angle of gradient’s surface at different temperatures was measured. The transportation behaviors of both water and dimethyl silicone oil on the wettability gradient’s surface were investigated; the results illustrate that the wettability gradient’s slippery surface can successfully self-lubricate from regions with low pillar density to regions with high pillar density, ascribed to the unbalanced Young’s force. The anti-sticking capability of the electrosurgical scalpel with self-lubricating slippery surface was tested. Both the adhesion force and adhesion mass under different cycles were calculated. The results suggest that the as-prepared slippery surface has excellent anti-sticking ability associated with better durability.

Hydrophilic Silica Thin Film Formed Using Dimethyl Silicone Oil and Ozone

2014 ◽  
Vol 893 ◽  
pp. 524-527
Author(s):  
Hiroyuki Arima ◽  
Takuya Ito ◽  
Kensuke Nishioka
Keyword(s):  
Thin Film ◽  
Contact Angle ◽  
Water Contact Angle ◽  
Silicone Oil ◽  
Solar Panels ◽  
Water Contact ◽  
Glass Substrates ◽  
Different Temperatures ◽  
Silica Thin Film ◽  
Dimethyl Silicone

In order to fabricate the SiO2 thin film using dimethyl silicone oil and ozone on protective covering glass for solar panels, the hydrophilicity and the transmittance of the film was investigated. We fabricated the film at different temperatures of 150°C, 175°C, 200°C, 225°C and 250°C on the glass substrates. The hydrophilicity of the film fabricated at 150°C showed very good hydrophilicity (water contact angle: ~8°), and transmittance was improved compared to the non-coated glass.

LANTHANUM TITANATE NANOPARTICLES ER FLUIDS WITH HIGH PERFORMANCE

2012 ◽  
Vol 26 (13) ◽  
pp. 1250079 ◽  
Author(s):  
DE WANG ◽  
RONG SHEN ◽  
SHIQIANG WEI ◽  
KUNQUAN LU
Keyword(s):  
Yield Stress ◽  
Silicone Oil ◽  
Heating Temperature ◽  
Hydroxyl Group ◽  
Lanthanum Titanate ◽  
Different Temperatures ◽  
Static Yield ◽  
Er Fluids ◽  
Er Fluid ◽  
Static Yield Stress

A new type of electrorheological (ER) fluid consisting of lanthanum titanate (LTO) nanoparticles is developed. The ER fluids were prepared by suspending LTO powder in silicone oil and the particles were fabricated by wet chemical method. This ER fluid shows excellent ER properties: The static yield stress reaches over 150 kPa under 5 kV/mm with linear dependence on the applied DC electric field, and the current density is below 10 μA/cm2. In order to investigate the affect factor on the ER behavior, the LTO powder were heated under different temperatures. The ER performances of two particles treated under different temperatures were compared and the composition changes for those particles were analyzed with TG-FTIR technique. It was found that the static yield stress of the suspensions fell from over 150 kPa to about 40 kPa and the current densities decreased prominently as the rise of the heating temperature. TG-FTIR analysis indicated that polar groups remained in the particles such as alkyl group, hydroxyl group and carbonyl group etc., contribute to the ER effect significantly. The experimental results are helpful to understand the mechanism of the high ER effect and to synthesize better ER materials.

Reducing the contact resistance between a textile of MWCNT-coated conductive fibers and a metal wire using carbon black/dimethyl silicone oil

TANSO ◽  
2018 ◽  
Vol 2018 (283) ◽  
pp. 124-127
Author(s):  
Kazuki Akimoto ◽  
Teruya Goto ◽  
Hiroshi Awano ◽  
Koichiro Yonetake ◽  
Tatsuhiro Takahashi
Keyword(s):  
Carbon Black ◽  
Contact Resistance ◽  
Silicone Oil ◽  
Metal Wire ◽  
Dimethyl Silicone ◽  
Conductive Fibers

The viscosity of dimethyl silicone oil and the concentration of absorbed air

AIChE Journal ◽  
2011 ◽  
Vol 57 (12) ◽  
pp. 3299-3304 ◽  
Author(s):  
Yurun Fan ◽  
Kun Wang
Keyword(s):  
Silicone Oil ◽  
Dimethyl Silicone

Investigation of Some Liquid Lubricants for Potential Aerospace Application

2005 ◽  
Author(s):  
Weimin Liu ◽  
Lijun Weng ◽  
Dapeng Feng ◽  
Haizhong Wang
Keyword(s):  
Carrying Capacity ◽  
Friction And Wear ◽  
Silicone Oil ◽  
Load Carrying Capacity ◽  
Aerospace Application ◽  
Liquid Lubricant ◽  
Silicon Oil ◽  
Load Carrying

Some liquid lubricants for potential aerospace application were prepared. The lubricity of lubricants including silicon oil with and without chlorobenzene group, cyclotriphosphazene derivative X-1P and perfluoropolyether (PFPE) for both steel/steel and steel/bronze sliding pairs were investigated. Gel percolation chromatography (GPC) was used to detect the tribo-polymerization of the tested silicone oil. Materials related to friction pairs is essential, silicon oil and PFPE are not quite effective for lubrication of a steel/steel pair, but be able to reduce both friction and wear of a steel/bronze pair. Chemical reactive elemental such as chlorine, which is substituted into silicon oil, is helpful to improve the antiwear and load-carrying capacity of liquid lubricant. X-1P is also an effective liquid lubricant for both steel/steel and steel/bronze sliding pairs.

scholarly journals Self-assembling of Chimeric Mussel-inspired Bio-adhesives Originated from Mytilus Californianus and Anabaena Flos-aquae: A New Approach to Develop Underwater Adhesion

2021 ◽  
Author(s):  
Hamidreza Iranpour ◽  
Hossein Shahsavarani ◽  
Seyed Nezamedin Hosseini ◽  
Hani Hosseini Far ◽  
Sareh Zhand ◽  
...  
Keyword(s):  
Adhesion Force ◽  
Protein A ◽  
Mytilus Californianus ◽  
Chimeric Proteins ◽  
Adhesion Forces ◽  
New Approach ◽  
Underwater Adhesion ◽  
Ph Values ◽  
Self Assembling ◽  
Wide Range

Abstract Bio-adhesives play a pivotal role in a wide range of medical applications. However, there are some problems about their application in varied pH values and low adhesion force under wet conditions. Here, we report new recombinant fusion protein achieved by mussel foot proteins (Mfps) of Mytilus Californianus and gas vesicle protein A (GvpA) of Anabaena flos-aquae by genetic engineering methods. These chimeric proteins self-assembled into ß-sheet rich fibres because of GvpA amyloid structure. Also, their adhesion forces were significantly increased especially in alkaline environment based on Mfp-3 and Mfp-5. This study illustrates that copolymer of Mfp-5-GvpA:GvpA-Mfp-3 can be used as an underwater sturdy adhesive with tolerance to auto-oxidation, especially at basic conditions.

scholarly journals Facile One-Step Method to Fabricate a Slippery Lubricant-Infused Surface (LIS) with Self-Replenishment Properties for Anti-Icing Applications

Coatings ◽  
2020 ◽  
Vol 10 (2) ◽  
pp. 119 ◽  
Author(s):  
Juantao Zhang ◽  
Bei Liu ◽  
Yan Tian ◽  
Fushan Wang ◽  
Qingguo Chen ◽  
...  
Keyword(s):  
Surface Water ◽  
Oil Content ◽  
Silicone Oil ◽  
Sliding Angle ◽  
Step Method ◽  
Oil Film ◽  
One Step ◽  
Dimethyl Silicone ◽  
Short Time ◽  
Surface Observations

In this work, a slippery lubricant-infused surface (LIS) was prepared by simple one-step mixing of polydimethylsiloxane (PDMS) resin and dimethyl silicone oil (PMX-200) directly. Silicone oil showed good compatibility with PDMS resin, and the added amount of silicone oil had no significant effect on the surface morphology of LIS. According to the results of surface observations, once the silicone oil film anchored on the LIS was removed, the silicone oil inside the PDMS polymer automatically diffused to the surface and formed a new silicone oil film again in a short time. Furthermore, with the increase of silicone oil content, the oil self-replenishment speed and amount of the LIS were enhanced, which also promoted a decrease of the surface water sliding angle and the improvement of the lubrication ability of the LIS. In the icing/deicing cycle tests, the slippery LIS still maintained very low ice adhesion strength after 24 cycles, showing excellent anti-icing performance.

Pattern Formation of Silicon Oxide Thin Film with InkMask

2013 ◽  
Vol 481 ◽  
pp. 98-101
Author(s):  
Takuya Ito ◽  
Yasuyuki Ota ◽  
Kensuke Nishioka
Keyword(s):  
Thin Film ◽  
Heat Treatment ◽  
Silicon Oxide ◽  
Silicone Oil ◽  
Silicon Film ◽  
Oxide Thin Film ◽  
Silicon Oxide Film ◽  
Simple Process ◽  
Circle Pattern ◽  
Dimethyl Silicone

Patterned silicon oxide films were formed by a simple process using a dimethyl-silicone-oil as source and inks as patterning masks.After the coating of the ink, the dimethyl-silicone-oil was coated onto the substrate. The sample was heated at 150oC and ozone gas was irradiated. After the heat treatment with ozone gas, patterned silicon film was formed. The circle pattern with a diameter of 20 μm wassuccessfully formed.After the formation of the patterned silicon oxide film, the silicon oxide was hardly observed at the position where the ink coated.

scholarly journals Pillar versus dimple patterned surfaces for wettability and adhesion with varying scales

2018 ◽  
Vol 15 (148) ◽  
pp. 20180681 ◽  
Author(s):  
Meng Li ◽  
Qingwen Dai ◽  
Wei Huang ◽  
Xiaolei Wang
Keyword(s):  
Adhesion Force ◽  
Silicone Oil ◽  
Scale Dependence ◽  
Liquid Interface ◽  
Patterned Surfaces ◽  
Adhesion Properties ◽  
Flat Surfaces ◽  
Micro Dimples ◽  
Solid Liquid Interface ◽  
Solid Liquid

Inspired by biological topographical surfaces, micropatterned elastomeric surfaces with square pillars and dimples of different geometry scales were fabricated. Their wettability and adhesion properties with various liquids were systematically investigated and compared with flat surfaces. Interesting results were obtained in the case of silicone oil (the toe-pad-like wetting case) in that the scale-dependent wettability and adhesion performed inversely for pillars and dimples. Micropillars significantly enhanced the surface wettability with a geometry scale dependence, whereas the dimples suppressed the wettability independent of the geometry scale. The adhesion force of the micropillars increased with an increase of the geometry scale. However, in the case of the micro-dimples, the adhesion force obviously decreased with an increase of the geometry scale. This behaviour was attributed to the fact that pillars are ‘open’ to oil but dimples are ‘close’ to oil, presenting different orientations to the solid–liquid interface.

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