scholarly journals The Compatibility of Three Silicone Oils with Polydimethylsiloxane and the Microstructure and Properties of Their Composite Coatings

Polymers ◽  
2021 ◽  
Vol 13 (14) ◽  
pp. 2355
Author(s):  
Yuguo Jiang ◽  
Zhanping Zhang ◽  
Yuhong Qi
Keyword(s):  
Contact Angle ◽  
Phase Separation ◽  
Silicone Oil ◽  
Composite Coatings ◽  
Methyl Silicone ◽  
Water Contact ◽  
Obvious Effect ◽  
Microstructure And Properties ◽  
Silicone Oils ◽  
Existing Form

The compatibility of three types of silicone oil with polydimethylsiloxane, the phase separation of their mixture and the microstructure and properties of their composite coatings were investigated. The existing form of silicone oil in the coating and the precipitation behavior were also studied. The compatibility observed experimentally of the three silicone oils with PDMS is consistent with the results of the thermodynamic calculation. The silicone oil droplet produced by phase separation in the mixture solution can keep its shape in the cured coating, also affecting the microstructure and mechanical properties of the coating. It was found that methyl silicone oil and methyl fluoro silicone oil do not precipitate on the surface, and they have no effect on the surface properties of the coating. In contrast, phenyl silicone oil has obvious effect on the surface, which makes the water contact angle and diiodomethane contact angle of the coating decrease significantly.

Preparation and Characterization of Waterborne Fluorinated Polyurethane-Acrylate

2017 ◽  
Vol 753 ◽  
pp. 60-64
Author(s):  
Wei Yang ◽  
Ming Jian Song ◽  
Bin Xie ◽  
Yue Jing Zhou
Keyword(s):  
Contact Angle ◽  
Phase Separation ◽  
Water Contact Angle ◽  
Film Surface ◽  
Surface Hydrophobicity ◽  
Toluene Diisocyanate ◽  
Water Contact ◽  
Obvious Effect ◽  
Fluorinated Polyurethane ◽  
Polyurethane Acrylate

Fluorinated urethane-acrylic monomer (FUA) was synthesized using toluene diisocyanate (TDI), 1H, 1H, 2H, 2H-Perfluorooctanol(FOH) as well as hydroxyethyl methacrylate(HEMA), and then applied to prepare waterborne fluorinated polyurethane-acrylate (FPUA) via emulsion polymerization. The effect of FUA content on surface properties of latex films was evaluated by means of nuclear magnetic resonance (1H NMR), atomic force microscope (AFM) and water contact angle test. It is shown that FUA monomer content is related to phase separation of the film surface and water contact angle. As FUA content was increased from 0 wt% to 11.8 wt%, water contact angle was increased from 84° to 104.5°. Further increase of FUA has little influence on surface hydrophobicity but obvious effect on surface phase separation, and the reason which led to this phenomenon is described.

Enhancing the Strengths of Adhesion Bonds Between Composite Surface and Coating via UV Treatments

2017 ◽  
Author(s):  
R. Asmatulu ◽  
K. S. Erukala ◽  
M. M. Rahman
Keyword(s):  
Contact Angle ◽  
Uv Radiation ◽  
Uv Light ◽  
Composite Coatings ◽  
Weight Ratio ◽  
High Strength ◽  
Water Contact ◽  
Composite Surface ◽  
Adhesion Properties ◽  
Infrared Spectrometer

Field of composites is rapidly growing in many industries such as aviation, energy and automotive industries. Composites are known to have a high strength to low weight ratio. Significant improvement in the performance of coatings used in the protection of military and civil aircraft has been achieved the last thirty years. Composite coatings are exposed to many environmental conditions, which can significantly affect their properties. In this research, UV light treatment on the surface of composite was introduced to examine its effects on the adhesion properties between the coating and substrate. A cross-cut test was conducted on the composite panels to assess the adhesion of paint to the substrate after the treatments. Coating performance analyses were also carried out using a Fourier transform infrared spectrometer, water contact angle, and optical microscopic images. The first set of panels was treated with UV radiation for 0, 2, 4 and, 8 days, and the surface wettability was also assessed using the contact angle test. Two coats of paints, including a primer and top coat, were used, and the panels were exposed to UV radiation and immersed in water for 500 hrs and 1000 hrs. It was found that untreated panels showed a much higher contact angle of 106°, whereas the contact angle of panels treated with UV radiation was reduced to 47°. The cross-cut tests showed considerable flaking of the coating along the edges and squares of panels that were not treated, and very small flakes along the edges and parts of the grid square on panels that were UV treated, thus confirming the enhancement of coating adhesion between composite and coating surfaces by UV treatments.

Preparation and Properties Fluoralkylpolysiloxane Modified Polyurethane Films

2009 ◽  
Vol 620-622 ◽  
pp. 741-744 ◽  
Author(s):  
Rui Weng ◽  
Chong Rui Wang ◽  
Lian Meng Zhang ◽  
Shui Ping Wang
Keyword(s):  
Contact Angle ◽  
Water Contact Angle ◽  
Silicone Oil ◽  
Soft Segment ◽  
High Water ◽  
Water Contact ◽  
Sulfuryl Fluoride ◽  
Low Surface Energy ◽  
End Capping ◽  
Amino Silicone

Fluoralkylpolysiloxane modified Polyurethane (FSPU) films with high water contact angle (CA) were prepared. fluoralkylpolysiloxane was obtained using perfluoro octyl sulfuryl fluoride and terminal amino-silicone oil as reactants. Then, the isocyanate end capped PU prepolymer was synthesized by reacting isocyanate with a soft segment mixed by active amino-end-capping fluoralkylpolysiloxane and polyether glycol. The fluoralkylpolysiloxane modified PU films were obtained after the PU prepolymer was cured by 3,3 '- dichloro -4,4' – amino - diphenyl methane (MOCA). The results showed that the modified polyurethane with 10% (mass fraction) PFATPS had a good compatibility, low surface energy, surface water contact angle and surface oil contact angle was improved by 49° and 37° respectively, and heat resistance, water resistance was apparently improved.

Superhydrophobic Coatings Prepared by Micro/nano Particles Mixed with Fluorocarbon Resin

2011 ◽  
Vol 687 ◽  
pp. 552-556
Author(s):  
Yu Hong Qi ◽  
Zhan Ping Zhang ◽  
Jing Zhao Wang ◽  
Ya Meng Chen
Keyword(s):  
Contact Angle ◽  
Electrochemical Impedance ◽  
Composite Coatings ◽  
Single Layer ◽  
Contact Angle Measurement ◽  
Angle Measurement ◽  
Nano Particles ◽  
Mass Ratio ◽  
Water Contact ◽  
Marine Corrosion

In this paper, single and multilayer superhydrophobic composite coatings, based on fluorocarbon resin and micro-tourmaline and nano-TiO2powers, were prepared by conventional air spray method. The tourmaline and TiO2particles were modified by fluoroalkylsilane. The wettability and marine corrosion of the coatings surfaces were investigated respectively by contact angle measurement and Electrochemical Impedance Spectroscopy (EIS) method, and their morphology was examined by Scanning Electron Microscopy (SEM). The results showed that the water contact angle of coatings was mainly controlled by the mass ratio of the fluorocarbon resin and particles. The contact angle increased with the increase of particle concentration, which reached about 156° when the mass ratio of the particles and fluorocarbon resin was 2:1 for single and multilayer composite coatings, but the impedance valve of the multilayer is higher than that of the single layer.

scholarly journals The Synthesis of Nonionic Hyperbranched Organosilicone Surfactant and Characterization of Its Wetting Ability

Coatings ◽  
2020 ◽  
Vol 11 (1) ◽  
pp. 32
Author(s):  
Jie Liu ◽  
Feifei Zhang ◽  
Yinghu Song ◽  
Kun Lv ◽  
Ni Zhang ◽  
...  
Keyword(s):  
Contact Angle ◽  
Silicone Oil ◽  
Water Solution ◽  
Gel Permeation Chromatography ◽  
Waterborne Polyurethane ◽  
Hydroxyl Groups ◽  
Water Contact ◽  
Wetting Ability ◽  
Ft Ir ◽  
Organosilicone Surfactant

In this research, the epoxy silicone oil and self-made hydroxyl-terminated hyperbranched polymer (HBP-OH) were used to synthesis the nonionic hyperbranched organosilicone surfactant (NHSi). The molar rate of hydroxyl groups of HBP-OH and epoxy groups of epoxy silicon oil (n-OH: n-epoxy) was adjusted from 5:1~60:1 to prepare a series of NHSi. The Gel Permeation Chromatography (GPC), Fourier Transform Infrared Spectroscopy (FT-IR), contact angle measuring instrument, surface tensiometer and Scanning Electron Microscope (SEM) were employed to characterize the structure and property of HBP-OH and NHSi. GPC analysis indicated that the Mn of HBP-OH was 340.5. FT-IR analysis showed that with the increase of molar rate of n-OH:n-epoxy, the peak intensity of –OH increased. The prepared NHSi was then used to prepare the water solution. The lowest surface tension of NHSi solution was 24.71 mN·m−1 when the n-OH:n-epoxy was 30:1 in the preparation process. The minimum water contact angle of waterborne polyurethane (WPU) emulsion by adding 2% of NHSi was 14.85° on the surface of glass. The wetting experiments showed that the NHSi has good wetting ability to fixed sea-island superfine fiber synthetic material.

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.

Effects of Acid Concentration on the Superhydrophobic Surface on Aluminum Alloy by Etching and PP-Coating

2013 ◽  
Vol 763 ◽  
pp. 49-52 ◽  
Author(s):  
Wen Yong Liu ◽  
Lin Yu Sun ◽  
Ruo Mei Wu ◽  
Yi Chen ◽  
Yue Jun Liu
Keyword(s):  
Contact Angle ◽  
Aluminum Alloy ◽  
Hydrochloric Acid ◽  
Acid Concentration ◽  
Superhydrophobic Surface ◽  
Hydrophobic Surface ◽  
Etching Time ◽  
Hydrochloric Acid Concentration ◽  
Water Contact ◽  
Obvious Effect

We investigated the effect of hydrochloric acid concentration for preparing the superhydrophobic surface on aluminum alloy by etching and PP coating. The superhydrophobicity of the surface was characterized by water contact angle. The morphologies of the surface were observed by SEM. The results showed that the acid concentration had an obvious effect on the hydrophobic surface and a good superhydrophobic surface was achieved by PP coating after etching for suitable time. When the acid concentration is lower, the longer time is necessary for obtaining the superhydrophobic surface. When the concentration of hydrochloric acid was 4 g/L and the etching time was only 8 min, the best superhydrophobic surface with the highest contact angle (CA) of 157° was prepared. The obtained superhydrophobic surface resulted from the rough surface and the material of PP with the low surface energy.

scholarly journals Thiolated Silicone Oils as New Components of Protective Creams in the Prevention of Skin Diseases

Materials ◽  
2021 ◽  
Vol 14 (16) ◽  
pp. 4723
Author(s):  
Agnieszka Kulawik-Pióro ◽  
Anna K. Drabczyk ◽  
Joanna Kruk ◽  
Magdalena Wróblewska ◽  
Katarzyna Winnicka ◽  
...  
Keyword(s):  
Skin Diseases ◽  
Silicone Oil ◽  
Water Vapor Permeability ◽  
Droplet Size Distribution ◽  
Amide Bond ◽  
Vapor Permeability ◽  
Methyl Silicone ◽  
Adhesion Properties ◽  
Silicone Oils ◽  
Carboxylic Groups

This work investigates the possibility of using thiolated silicone oils as new components in protective creams and their impact on the efficacy of these products. Thiolated silicone oils were synthesized by amide bond formation between primary amino groups of poly17dimethylsiloxane-co-(3-aminopropyl)-methylsiloxane] and carboxylic groups of thiol ligand (3-mercaptopropionic acid) with carbodiimide as a coupling agent. To evaluate and compare the properties of these kinds of thiomers, three different emulsion o/w types were obtained. Emulsion E1 contained methyl silicone oil, E2 poly[dimethylsiloxane-co-(3-aminopropyl)-methylsiloxane], and E3 thiolated silicone oil (silicone-MPA), respectively. Physicochemical properties, including pH, conductivity, droplet size distribution, viscosity, and stability, were assessed. The efficacy of barrier creams in the prevention of occupational skin diseases depends on their mechanical and rheological properties. Thus, the method which imitates the spreadability conditions on the skin and how structure reconstruction takes places was performed. We also investigated textural profile, bioadhesion, protection against water and detergents, and water vapor permeability. Emulsion E3 was characterized by beneficial occlusion, spreadability, and adhesion properties. These features with prolonged residence time on the skin can make designed barrier creams more preferable for consumers.

scholarly journals Effects of One-Step Hot Oil Treatment on the Physical, Mechanical, and Surface Properties of Bamboo Scrimber

Molecules ◽  
2020 ◽  
Vol 25 (19) ◽  
pp. 4488
Author(s):  
Zhurun Yuan ◽  
Xinwu Wu ◽  
Xinzhou Wang ◽  
Xi Zhang ◽  
Tiancheng Yuan ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Contact Angle ◽  
Surface Properties ◽  
Mechanical Performance ◽  
Treatment Effectiveness ◽  
Treatment Time ◽  
Silicone Oil ◽  
Methyl Silicone ◽  
Swelling Properties ◽  
Bamboo Scrimber

Bamboo scrimber is a new type of bamboo-based panel that is prone to be affected by biological and service environments under outdoor conditions. In this paper, the physical and mechanical performance and the microchemical and surface properties of untreated and hot-oil-treated bamboo scrimber were analyzed to illustrate the processing mechanism of scrimber. Methyl silicone oil treatment was carried out at 120, 140, and 160 °C for 2, 4, and 6 h. The density, mechanical properties, air-dried moisture content, surface morphology, chemical structure, swelling properties, color, and contact angle of the bamboo scrimber were analyzed to evaluate the treatment effectiveness. Observation of the environmental-scanning electron microscope indicated that the glue layer of the bamboo scrimber was not significantly damaged after hot oil treatment. At low temperatures, the mechanical properties did not change significantly. Infrared-spectrum analysis showed a significant decrease in mechanical properties at higher temperatures and longer treatment time for the degradation of hemicellulose. The contact angle test and swelling properties test showed that the hot oil treatment improved the dimensional stability and reduced the wettability on the surface of the bamboo scrimber. The above analysis results show that the treatment at 140 °C for 2 h is most effective.

Preparation of Solvent-Free Moisture Curable Heavy Anti Corrosion PU Coating

2014 ◽  
Vol 898 ◽  
pp. 80-83 ◽  
Author(s):  
Wu Ying Zhang ◽  
Wei Gao ◽  
Feng Lin
Keyword(s):  
Mechanical Properties ◽  
Contact Angle ◽  
Water Contact Angle ◽  
Silicone Oil ◽  
Ftir Spectra ◽  
Solvent Free ◽  
Water Contact ◽  
Water Tolerance ◽  
Free Moisture ◽  
Cured Coating

Isocyanate-terminated prepolymer was synthesized by reaction of polyether polyols with toluene diisocynate and was modified by CaO and hydroxyl silicone oil, then solvent-free moisture curable heavy anti corrosion PU coating was prepared. The structure of cured coating was characterized by FTIR spectra and SEM. The mechanical properties, water tolerance, water contact angle of cured coating were analysed. The results showed that the solvent-free moisture curable heavy anti corrosion PU coating had the best combination property with 5% polyether polyols N210, 4% CaO and 4% hydroxyl silicone oil.

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