Dynamic contact angle analysis of silicone hydrogel contact lenses using the Wilhelmy plate technique

In this work, carbon fibers were sized with different plasticizer of sizing agent in order to improve the performances of carbon fibers and the interface of carbon fibers composites. The chemical and physical changes induced by the treatments on carbon fibers surface are examined using dynamic contact angle analysis test(DCAT) , X-ray photoelectron spectroscopy (XPS). The interfacial shear strength (IFSS) of CF/EP composites are analysised by micro-droplet test. At the same time, the wear resistance was also studied in order to understand the effect of the plasticizer of sizing agent on the carbon fibers. The study shows that the 3# sized carbon fiber has the better wetting and surface energy. XPS results reveal that the 3# samples show a significant increase in oxygen-containing groups, such as–C–OH, -COOH, -C–O–C- and -COOR. 3#sizing agent also show better interface adhesion between fibers and matrix and has better wear resistant properties.

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Influence of head resistance force and viscous friction on dynamic contact angle measurement in Wilhelmy plate method

Colloids and Surfaces A Physicochemical and Engineering Aspects ◽

10.1016/j.colsurfa.2017.05.017 ◽

2017 ◽

Vol 527 ◽

pp. 115-122 ◽

Cited By ~ 10

Author(s):

Xiong Wang ◽

Qi Min ◽

Zhengming Zhang ◽

Yuanyuan Duan ◽

Yuning Zhang ◽

...

Keyword(s):

Contact Angle ◽

Dynamic Contact Angle ◽

Viscous Friction ◽

Dynamic Contact ◽

Contact Angle Measurement ◽

Angle Measurement ◽

Resistance Force ◽

Plate Method ◽

Wilhelmy Plate ◽

Wilhelmy Plate Method

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Hydrosilation-Cured Poly(dimethylsiloxane) Networks: Intrinsic Contact Angles via Dynamic Contact Angle Analysis

Macromolecules ◽

10.1021/ma021154x ◽

2003 ◽

Vol 36 (10) ◽

pp. 3689-3694 ◽

Cited By ~ 43

Author(s):

Janelle M. Uilk ◽

Ann E. Mera ◽

Robert B. Fox ◽

Kenneth J. Wynne

Keyword(s):

Contact Angle ◽

Dynamic Contact Angle ◽

Dynamic Contact ◽

Contact Angles ◽

Contact Angle Analysis

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Measurement errors related to contact angle analysis of hydrogel and silicone hydrogel contact lenses

Journal of Biomedical Materials Research Part B Applied Biomaterials ◽

10.1002/jbm.b.31442 ◽

2009 ◽

Vol 91B (2) ◽

pp. 662-668 ◽

Cited By ~ 25

Author(s):

Michael L. Read ◽

Philip B. Morgan ◽

Carole Maldonado-Codina

Keyword(s):

Contact Angle ◽

Measurement Errors ◽

Contact Lenses ◽

Silicone Hydrogel ◽

Contact Angle Analysis

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Improved interfacial and impact properties of carbon fiber/epoxy composites through grafting hyperbranched polyglycerols on a carbon fiber surface

e-Polymers ◽

10.1515/epoly-2013-0029 ◽

2014 ◽

Vol 14 (2) ◽

pp. 145-150 ◽

Cited By ~ 5

Author(s):

Kaiqiang Sui ◽

Qingbo Zhang ◽

Yingying Liu ◽

Lei Tan ◽

Li Liu

Keyword(s):

Contact Angle ◽

Shear Strength ◽

Carbon Fiber ◽

Carbon Fibers ◽

Dynamic Contact Angle ◽

Fiber Surface ◽

Dynamic Contact ◽

Impact Properties ◽

Carbon Fiber Surface ◽

Contact Angle Analysis

AbstractGrafting hyperbranched polyglycerols onto a carbon fiber surface is done in an attempt to improve the interfacial and impact properties between carbon fiber and epoxy resin. Scanning electron microscopy (SEM), thermal gravimetric analysis (TGA), X-ray photoelectron spectroscopy (XPS) and dynamic contact angle analysis were performed to characterize the carbon fibers. The TGA result shows that the mass fraction of the hyperbranched polyglycerols grafted onto the carbon fibers surface was 9.03%. The SEM results indicate that the hyperbranched polyglycerols have been grafted onto the carbon surface and that the surface roughness of the carbon fiber significantly increased. The XPS result indicates that oxygen-containing functional groups obviously increased after modification. Dynamic contact angle analysis indicates that the surface energy of modified carbon fibers increased significantly compared with the untreated ones. Results of the mechanical property tests show that interfacial shear strength increased from 59.86 to 80.16 MPa, interlaminar shear strength increased from 57.57 to 73.49 MPa and impact strength simultaneously increased from 2.52 to 3.52 J.

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Evaluation of fouling potential of nanofiltration membranes based on the dynamic contact angle measurements

Polish Journal of Chemical Technology ◽

10.2478/v10026-012-0091-4 ◽

2012 ◽

Vol 14 (3) ◽

pp. 97-104 ◽

Cited By ~ 14

Author(s):

Marek Gryta ◽

Justyna Bastrzyk ◽

Diana Lech

Keyword(s):

Contact Angle ◽

Dynamic Contact Angle ◽

Dynamic Contact ◽

Deionized Water ◽

Membrane Surfaces ◽

Angle Measurements ◽

Wilhelmy Plate ◽

Contact Angle Measurements ◽

Organic Fouling ◽

Wilhelmy Plate Method

In this work the studies were performed on the intensity of fouling of the membrane NF90 and NF270 depending on the value of dynamic contact angle, previously determined for these membrane. The NF membranes were used for the separation of broth obtained during the fermentation of glycerol by Lactobacilluscasei bacteria. The measurements of dynamic contact angle were carried out using the Wilhelmy plate method. Taped membranes samples (support layer to support layer), wetted for 2 days in deionized water prior to testing, were used to study the contact angle of top layer and its organic fouling. Using deionized water; the contact angle values equal to 27-30o and 53-57o for NF270 and NF90, respectively, were obtained. As a consequence of adsorption of organic compound on the membrane surfaces, the contact angle obtained for both fouled membranes was about 55-56o, and this value was closer to the contact angle of non-fouled NF90 membrane. Therefore, the NF90 membrane was more resistant to organic fouling during the separation of broth.

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