Codepositon of Dopamine/Calcium on Titanium to Enhancing Implant Integration

2013 ◽  
Vol 647 ◽  
pp. 129-132 ◽  
Author(s):  
Xin Ming Zhang ◽  
Zhao Yang Li ◽  
Xu Bo Yuan ◽  
Zhen Duo Cui ◽  
Xian Jin Yang ◽  
...  
Keyword(s):  
Gene Expression ◽  
Contact Angle ◽  
Bone Repair ◽  
Titanium Surface ◽  
Titanium Implant ◽  
Hydrophobic Property ◽  
Water Contact ◽  
Implant Integration ◽  
Bare Titanium ◽  
Calcium Modification

Calcium plays an important role in various stages of bone repair. Surface calcium modification is a common method to improve the biocompatibility of titanium implant. In this work, anovel facile codeposition dopamine/calcium on titanium alloy method for orthopedics applications was developed. SEM-EDS results showed calcium microspheres uniformly deposited on titanium surface with dopamine. Water contact angle showed the dopamine/calcium modification layer improved the bare titanium surface hydrophobic property. And the dopamine/calcium coating enhanced the cell proliferation by MTT test. The ALP gene expression also showed the dopamine/calcium coating may enhance the cell early differentiation. Such facile method has great potential in titanium applications.

Effect of Plasma-Induced Polymerization on Contact Angle of Paper

2011 ◽  
Vol 396-398 ◽  
pp. 1619-1623
Author(s):  
Zhao Ping Song ◽  
Jun Rong Li ◽  
Hui Ning Xiao
Keyword(s):  
Contact Angle ◽  
Photoelectron Spectroscopy ◽  
Contact Angle Measurement ◽  
Angle Measurement ◽  
Polymer Grafting ◽  
Hydrophobic Property ◽  
Cellulose Fibres ◽  
Water Contact ◽  
X Ray ◽  
Factors Associated

Hydrophobic modification of cellulose fibres was conducted by plasma-induced polymer grafting in an attempt to increase the hydrophobicity of paper. Two hydrophobic monomers, i.e., butyl acrylate (BA) and 2-ethylhexyl acrylate (2-EHA) were grafted on cellulose fibres, induced by atmospheric cold plasma. Various influencing factors associated with the plasma-induced grafting were investigated, including the contact time and reaction temperature with monomers, and the dosage of monomers. Contact-angle measurement, infrared spectrum (IR), X-ray photoelectron spectroscopy (XPS) and scanning electron microscope (SEM) were used to ascertain the occurrence of the grafting. The results showed that the hydrophobic property of the modified paper sheet was improved significantly after the plasma-induced grafting. The water contact angle on the surface of the paper reached up to higher than125°.

Super-Hydrophobic Film Prepared with Reduced Graphene Sheets and its Application as Corrosion Barrier to Copper

2013 ◽  
Vol 365-366 ◽  
pp. 1100-1105 ◽  
Author(s):  
Peng Wang ◽  
Dun Zhang
Keyword(s):  
Contact Angle ◽  
Copper Surface ◽  
Cathodic Current Density ◽  
Corrosion Process ◽  
Graphene Sheets ◽  
Cathodic Current ◽  
Hydrophobic Property ◽  
Time Saving ◽  
Water Contact ◽  
Reduced Graphene

Electrophoretic deposition is proposed to fabricate super-hydrophobic film on copper surface with reduced graphene sheets (RGSs). The resulted film was characterized with contact angle meter, scanning electron microscopy and so on. It is found that the film presents super-hydrophobic property with water contact angle of 150.4°. Air can be trapped in the island-like structure and intensify the wettability of film. Electrochemical measurements prove that super-hydrophobic film can inhibit corrosion process of underlying copper by inducing both anodic and cathodic current density. This method for super-hydrophobic film fabrication is facial and time-saving, and it will expand the application of RGSs in mechanical engineering.

Effects of Titanium Surface Wettability on Osteoblast Behavior In Vitro

2020 ◽  
Vol 985 ◽  
pp. 64-68
Author(s):  
Kenta Nisogi ◽  
Satoshi Okano ◽  
Sengo Kobayashi ◽  
Kensuke Kuroda ◽  
Takeaki Okamoto
Keyword(s):  
Contact Angle ◽  
Water Contact Angle ◽  
Titanium Surface ◽  
Pure Titanium ◽  
Hydrophobic Surface ◽  
Surface Wettability ◽  
In Vitro Assays ◽  
Water Contact ◽  
Heat Treated

Surface wettability is thought to influence the osteoconductivity of bone-substituting materials; however, the effects of surface wettability on osteoblast behavior are not well understood. In this study, we prepared both an as-polished pure titanium with a water contact angle (WCA) of 57° and heat-treated pure titanium with more hydrophobic surface and WCAs of 68°-98°. The effects of the surface wettability of pure titanium on osteoblast behaviors were evaluated by in vitro assays. Compared with the as-polished titanium, the proliferation rate of osteoblast increased on heat-treated titanium. This suggested that surface wettability affects osteoblast behaviors, meaning osteoconductivity is influenced by surface wettability.

Synthesis of Novel Anionic Fluorinated Polyacrylate Emulsion and its Application in Leather Waterproofing

2012 ◽  
Vol 496 ◽  
pp. 511-514
Author(s):  
Wei Xu ◽  
Li Fen Hao
Keyword(s):  
Contact Angle ◽  
Processing Time ◽  
Processing Parameters ◽  
Single Factor ◽  
Hydrophobic Property ◽  
Water Contact ◽  
Fluorinated Acrylate ◽  
Fluorinated Polyacrylate ◽  
Acrylate Emulsion ◽  
Emulsion Processing

Novel anionic fluorinated polyacrylate emulsion (FLHA) was synthesized and characterized using Infrared spectrum (IR). Then it was used as waterproofing agent to treat wet blue leather and the effects of various parameters, such as dose of fluorinated acrylate emulsion, processing time, temperature, etc., on hydrophobic property of the treated crust leather were also investigated using single factor experimental method. Results showed that water contact angle (WCA) on the grain and flesh layers of the resultant leather had similar rule controled by dose of the FLHA, processing time and temperature and increased with augment of those factors. The most preferable processing parameters of the above factors were 6% (based on the weight of the treated wet blue leather), 60 minutes and 30 °C, repectively. Thus, WCA on the grain and flesh layers of the resultant leather could attain 130° and 136°.

scholarly journals INFLUENCE OF POLYETHYLENE OXIDE CONTENT ON SOME CHARACTERISTICS OF PLA/CS FILMS LOADING NIFEDIPINE

2017 ◽  
Vol 55 (6) ◽  
pp. 716 ◽  
Author(s):  
Nguyen Thuy Chinh ◽  
Trang Thi Thu Nguyen ◽  
Mai Thi Tran ◽  
Cong Van Do ◽  
Huynh Duc Mai ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Contact Angle ◽  
Polylactic Acid ◽  
Field Emission ◽  
Polyethylene Oxide ◽  
Oxide Content ◽  
Hydrophobic Property ◽  
Water Contact ◽  
Scanning Electron

This work mentions the effect of polyethylene oxide (PEO) content on some characteristics and properties of polylactic acid (PLA)/chitosan (CS) films loading nifedipine (NIF). The water contact angle, droplet size values and Field Emission Scanning Electron Microscopy (FESEM) images  of the films are used to investigate their morphology and hydrophobicity. The obtained results show that the hydrophobic property of the PLA/CS/NIF films is improved by the presence of PEO. Besides, the PLA/CS/NIF films containing PEO have tighter structure and water absorbed ability less than those of the PLA/CS/NIF films

Investigation of Different Membrane Porosities on the Permeate Flux of Direct Contact Membrane Distillation

2021 ◽  
Vol 889 ◽  
pp. 85-90
Author(s):  
Asmaa Elrasheedy ◽  
Mohammed Rabie ◽  
Ahmed Hassan El-Shazly ◽  
Mohamed Bassyouni ◽  
Ahmed Abd El-Moneim ◽  
...  
Keyword(s):  
Contact Angle ◽  
Direct Contact ◽  
Solution Concentration ◽  
Membrane Distillation ◽  
Permeate Flux ◽  
Hydrophobic Property ◽  
Water Contact ◽  
Direct Contact Membrane Distillation ◽  
Static Water ◽  
Membrane Porosity

In the present study the surface morphology of electrospun fibers at different polystyrene (PS) solution concentration was studied by SEM imaging to determine the best PS solution concentration yielding continuous uniform beadles fibers. Contact angle measurements of the optimum fabricatedPS-18 membrane confirmed the super hydrophobic property of the membrane that exhibited a static water contact angle of 145o. Numerical investigation of the performance of PS-18 membrane at different membrane thicknesses and porosities on direct contact membrane distillation showed that increasing the membrane porosity increases the permeate flux considerably.

Preparation and Application of Novel Cationic Fluorinated Polyacrylate Latex in Leather Waterproofing

2012 ◽  
Vol 496 ◽  
pp. 515-518 ◽  
Author(s):  
Wei Xu ◽  
Li Fen Hao
Keyword(s):  
Contact Angle ◽  
Infrared Spectrum ◽  
Processing Time ◽  
Processing Parameters ◽  
Single Factor ◽  
Hydrophobic Property ◽  
Water Contact ◽  
Fluorinated Acrylate ◽  
Fluorinated Polyacrylate ◽  
Acrylate Latex

Novel cationic fluorinated polyacrylate latex was synthesized and characterized using Infrared spectrum (IR). Then it was utilized as waterproofing agent to treat wet blue leather and the effects of various parameters, such as dose of fluorinated acrylate latex, processing time, temperature, etc., on hydrophobic property of the treated crust leather were also investigated using single factor experimental method. Results showed that water contact angle (WCA) on the grain and flesh sides of the resultant leather possessed similar rule controled by dose of the CFBDH, processing time and temperature and increased with augment of those factors. The most preferable processing parameters of the above factors were individually 6% (based on the weight of the treated wet blue leather), 60 minutes and 30 °C. Thus, WCA on the grain and flesh sides of the resultant leather could attain 136° and 143°.

scholarly journals UV-Photofunctionalization of Titanium Promotes Mechanical Anchorage in A Rat Osteoporosis Model

2020 ◽  
Vol 21 (4) ◽  
pp. 1235 ◽  
Author(s):  
Takashi Taniyama ◽  
Juri Saruta ◽  
Naser Mohammadzadeh Rezaei ◽  
Kourosh Nakhaei ◽  
Amirreza Ghassemi ◽  
...  
Keyword(s):  
Gene Expression ◽  
Contact Angle ◽  
Alkaline Phosphatase ◽  
Uv Light ◽  
Bone Implant ◽  
Post Menopausal Osteoporosis ◽  
Ovx Rats ◽  
Implant Integration ◽  
Pre Treatment

Effects of UV-photofunctionalization on bone-to-titanium integration under challenging systemic conditions remain unclear. We examined the behavior and response of osteoblasts from sham-operated and ovariectomized (OVX) rats on titanium surfaces with or without UV light pre-treatment and the strength of bone-implant integration. Osteoblasts from OVX rats showed significantly lower alkaline phosphatase, osteogenic gene expression, and mineralization activities than those from sham rats. Bone density variables in the spine were consistently lower in OVX rats. UV-treated titanium was superhydrophilic and the contact angle of ddH2O was ≤5°. Titanium without UV treatment was hydrophobic with a contact angle of ≥80°. Initial attachment to titanium, proliferation, alkaline phosphatase activity, and gene expression were significantly increased on UV-treated titanium compared to that on control titanium in osteoblasts from sham and OVX rats. Osteoblastic functions compromised by OVX were elevated to levels equivalent to or higher than those of sham-operated osteoblasts following culture on UV-treated titanium. The strength of in vivo bone-implant integration for UV-treated titanium was 80% higher than that of control titanium in OVX rats and even higher than that of control implants in sham-operated rats. Thus, UV-photofunctionalization effectively enhanced bone-implant integration in OVX rats to overcome post-menopausal osteoporosis-like conditions.

scholarly journals Fabrication of diverse carbon forms and their reversed applications in hexane/water separation

2020 ◽  
Vol 82 (7) ◽  
pp. 1296-1303
Author(s):  
Rujia Xie ◽  
Zhenxing Fang ◽  
Jiefeng Yan ◽  
Wei Wang ◽  
Xuan Cao ◽  
...  
Keyword(s):  
Contact Angle ◽  
Water Contact Angle ◽  
Carbon Foam ◽  
Carbonization Temperature ◽  
Hydrophobic Property ◽  
Water Contact ◽  
Water Separation ◽  
Carbonization Process ◽  
Carbon Foams ◽  
Melamine Foam

Abstract Melamine foam is an important material in production and life. A series of porous carbon foams were obtained through a simple carbonization process of melamine foam at different temperatures. The carbon foams obtained at the carbonization temperature of 400 and 600 °C reveal a hydrophobic and even super-hydrophobic property (water contact angle larger than 150°) with a hexane adsorption much larger than that of melamine foam. However, the carbon foam obtained at the carbonization temperature of 800 °C reveals a super-hydrophilic property (water contact angle smaller than 5°) due to its severest shrinkage during the carbonization process. Interestingly, this series of carbon foams have an excellent performance in oil adsorption. However, the carbon membranes derived from the 800 °C carbon foam reveals oleophobicity under water (the adsorbed water at the surface was extremely important), which allows the penetration of water and blocks the infiltration of hexane at the same time. These different carbon forms have reversed applications in hexane/water separation.

Hierarchical Ceramic Coating Reduces Adherence of Cells, Blood, Bacteria, and Tissue on Titanium Microsurgical Instruments

2021 ◽  
Author(s):  
Henriette Jaurich ◽  
Mustafa Becerikli ◽  
Jörg Zerrer ◽  
Christoph Wallner ◽  
Johannes M. Wagner ◽  
...  
Keyword(s):  
Contact Angle ◽  
High Performance ◽  
Surface Characterization ◽  
Titanium Surface ◽  
Ceramic Coating ◽  
Blood Compatibility ◽  
Sol Gel ◽  
Surgical Instruments ◽  
Water Contact ◽  
Pathogen Colonization

Abstract Background Progress in the field of microsurgery allows more detailed reconstructions of the smallest tissue structures. The applied instruments are left with biological residues after coming into contact with body fluids or tissue, leading to compromised surgical precision. Designing of residue-free innovative instruments would reduce the necessity of subsidiary practices and would improve the surgical precision. Methods We designed a ceramic coating (Lotus ceramic coating system 26—LCC-26) that exhibits self-cleaning surface properties on coated titanium specimens. A titanium surface was modified by blasting technology and electropolishing, followed by applying a high-performance ceramic and sol-gel finish layer. The physical surface characterization was performed by scanning electron microscopy and measuring the contact angle. The cell-repellent properties and cytotoxicity were investigated using live-dead staining, BrdU, and lactate dehydrogenase assay. Furthermore, bacterial and fluid-adhesion tests were performed. Finally, blood compatibility was analyzed according to DIN ISO 10993. Results The composite system LCC-26 increased the hydrophobic character of the titanium surface (the water contact angle of 74.9 degrees was compared with 62.7 degrees of the uncoated native titanium; p < 0.01) and led to the fluid and cell-repellent properties shown by the reduction in fibroblast adherence by ∼50.7% (p < 0.05), the reduction in Staphylococcus aureus pathogen colonization by 74.1% (p < 0.001), and the decrease in erythrocyte adherence by 62.9% (p < 0.01). Furthermore, the LCC-26 coated titanium microforceps dipped in human whole blood exhibited blood-repellent character (reduction in blood adherence by 46.1%; p < 0.05). Additionally, cyto- and hemocompatibility was guaranteed in direct and indirect tests. Conclusion Titanium surface modification on surgical instruments exhibits cell, bacteria, and blood-repellent properties with a full guarantee of cyto- and hemocompatibility. Thus, innovatively coated instruments could contribute to increased precision during microsurgical interventions and optimized medical operation routines in the future.

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