Contact angle measurement on porous substrates: Effect of liquid absorption and drop size

Krainer, Sarah; Hirn, Ulrich

doi:10.1016/j.colsurfa.2021.126503

Cited by 140 publications

(61 citation statements)

References 51 publications

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“…In all films, wettability increased with time; the contact angle was more reliable when the droplet was able to stop its oscillation or reach its maximum area (equilibrium). When the droplet diameter exceeds the capillary length, the droplet weight is a parameter that favors deformation [ 52 ].…”

Section: Analysis Of Resultsmentioning

confidence: 99%

Study of Titanium–Silver Monolayer and Multilayer Films for Protective Applications in Biomedical Devices

et al. 2021

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The search for coatings that extend the useful life of biomedical devices has been of great interest, and titanium has been of great relevance due to its innocuousness and low reactivity. This study contributes to the investigation of Ti/Ag films in different configurations (monolayer and multilayer) deposited by magnetron sputtering. The sessile droplet technique was applied to study wettability; greater film penetrability was obtained when Ag is the external layer, conferring high efficiency in cell adhesion. The morphological properties were characterized by SEM, which showed porous nuclei on the surface in the Ag coating and crystals embedded in the Ti film. The structural properties were studied by XRD, revealing the presence of TiO2 in the anatase crystalline phase in a proportion of 49.9% and the formation of a silver cubic network centered on the faces. Tafel polarization curves demonstrated improvements in the corrosion current densities of Ag/Ti/Ag/Ti/Ag/Ti/Ag/Ti and Ti/Ag compared to the Ag coating, with values of 0.1749, 0.4802, and 2.044 nA.m−2, respectively. Antimicrobial activity was evaluated against the bacteria Pseudomonas aeruginosa and Bacillus subtilis and the yeasts Candida krusei and Candida albicans, revealing that the Ti/Ag and Ag/Ti/Ag/Ti/Ag/Ti/Ag/Ti coatings exhibit promise in biomedical material applications.

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Section: Analysis Of Resultsmentioning

confidence: 99%

Study of Titanium–Silver Monolayer and Multilayer Films for Protective Applications in Biomedical Devices

et al. 2021

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“…Our previous study on contact angle measurement tests on the various thickness of PCL membranes found that PCL membranes are very hydrophobic (contact angle values varied between 120 and 150 degrees) [ 30 ]. The contact angle generally shows a linear relation to the absorbed water drop volume, independent of the substrate water absorption rate, drop volume, and contact time [ 46 ]. This means that a linear decrease in the measured contact angle can be observed with increasing water absorbed drop volume.…”

Section: Discussionmentioning

confidence: 99%

Incorporation of Mycobacteriophage Fulbright into Polycaprolactone Electrospun Nanofiber Wound Dressing

et al. 2022

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The Genus Mycobacterium includes pathogens known to cause disease in mammals such as tuberculosis (Mycobacterium tuberculosis) and skin infections (M. abscessus). M. smegmatis is a model bacterium that can cause opportunistic infections in human tissues and, rarely, a respiratory disease. Due to the emergence of multidrug-resistant bacteria, phage therapy is potentially an alternative way of treating these bacterial infections. As bacteriophages are specific to their bacterial host, it ensures that the normal flora is unharmed. Fulbright is a mycobacteriophage that infects the host bacteria M. smegmatis. The main goal of this study is to incorporate Mycobacteriophage Fulbright into a polycaprolactone (PCL) nanofiber and test its antimicrobial effect against the host bacteria, M. smegmatis. Stability tests conducted over 7 days showed that the phage titer does not decrease when in contact with PCL, making it a promising vehicle for phage delivery. Antimicrobial assays showed that PCL_Fulbright effectively reduces bacterial concentration after 24 h of contact. In addition, when stored at −20 °C, the phage remains viable for up to eleven months in the fiber. Fulbright addition on the nanofibrous mats resulted in an increase in water uptake and decrease in the mechanical properties (strength and Young’s modulus) of the membranes, indicating that the presence of phage Fulbright can greatly enhance the physical and mechanical properties of the PCL. Cytotoxicity assays showed that PCL_Fulbright is not cytotoxic to Balbc/3T3 mouse embryo fibroblast cell lines; thus, phage-incorporated PCL is a promising alternative to antibiotics in treating skin infections.

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“…Analysis of the water contact angle shows that the changes in the chemical structure of the PEEK via surface treatment improve its wettability. However, the HA/PEEK surface nanocomposite samples and the porous HA/PEEK surface nanocomposite samples show significant different wettability which can be due to the difference of the surface morphology of the samples 45 . For biomedical application, higher wettability property can improve capability in bioactivity and cell attachment properties 46 .…”

Section: Discussionmentioning

confidence: 99%

“…However, the HA/PEEK surface nanocomposite samples and the porous HA/PEEK surface nanocomposite samples show significant different wettability which can be due to the difference of the surface morphology of the samples. 45 For biomedical application, higher wettability property can improve capability in bioactivity and cell attachment properties. 46 The water contact angle results study were coordinated with the results of in vitro Alamar Blue Assay and gain weight via immersion in the SBF test which confirmed the enhancement of the bioactivity of the modified samples via increasing wettability.…”

Section: Discussionmentioning

confidence: 99%

Fabrication and in vitro study of 3D novel porous hydroxyapatite/polyether ether ketone surface nanocomposite

et al. 2021

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The unique characteristics of polyether ether ketone (PEEK) including low elastic modulus, high mechanical strength, and biocompatibility have made it an attractive alternative for the metallic biomaterials. However, its bioinert property is always the main concern, which could lead to poor osseointegration and subsequent clinical failure of the implant. Changing the surface structure to porous structure and mixing it with bioactive hydroxyapatite (HA) are the common methods, which could be used to enhance the properties of the PEEK‐based implants. In this study, friction stir processing was utilized for the fabrication of porous HA/PEEK surface nanocomposite. Scanning electron microscopic image of the nanocomposite surface showed nano‐scale roughness of the porous structure. Water contact angle test confirmed the increase in the wettability of the treated specimens. In vitro bioactivity test via simulated body fluid solution, initial cell adhesion, cell proliferation, and cell differentiation assay also confirmed the enhancement in bioactivity of the treated surface in comparison to the bare PEEK. This surface modification method requires no special equipment and would not damage the heat‐sensitive PEEK substrate due to the low temperature used during the fabrication process.

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Contact angle measurement on porous substrates: Effect of liquid absorption and drop size

Cited by 140 publications

References 51 publications

Study of Titanium–Silver Monolayer and Multilayer Films for Protective Applications in Biomedical Devices

Study of Titanium–Silver Monolayer and Multilayer Films for Protective Applications in Biomedical Devices

Incorporation of Mycobacteriophage Fulbright into Polycaprolactone Electrospun Nanofiber Wound Dressing

Fabrication and in vitro study of 3D novel porous hydroxyapatite/polyether ether ketone surface nanocomposite

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