Applicability of Contact Angle Techniques Used in the Analysis of Contact Lenses, Part 1

Campbell, Darren; Carnell, Sarah; Eden, Russell

doi:10.1097/icl.0b013e31828ca174

Cited by 40 publications

(28 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Figure presents the CAs of water droplet sample. Based on the obtained results, the CA between water and polymers was less than 90°, which indicates a good hydrophilicity behavior …”

Section: Resultsmentioning

confidence: 85%

Copper iodide nanoparticles‐decorated porous polysulfonamide gel: As effective catalyst for decarboxylative synthesis of N‐Arylsulfonamides

Alavinia

Ghorbani‐Vaghei

Rakhtshah

et al. 2020

Applied Organom Chemis

View full text Add to dashboard Cite

A porous cross‐linked poly (ethyleneamine)‐polysulfonamide (PEA‐PSA) as a novel organic support system is synthesized in the presence of silica template by nanocasting technique. The paper demonstrates immobilization of CuI nanoparticles inside the pores (PEA‐PSA@CuI) for the facile recovery and recycling of these nanoparticles. The presence of porous PEA‐PSA and PEA‐PSA@CuI nanocomposites was confirmed using FT‐IR spectroscopy, FE‐SEM, EDX, TGA, XRD, TEM, BET, XPS, WDX, 1H NMR, and ICP‐OES techniques. The PEA‐PSA@CuI along with Ag(I)/K2S2O8 was implemented as a reusable cooperative catalyst‐oxidant system in the N‐arylation of p‐toluenesulfonamide with substituted carboxylic acids in mild condition. So, the novel decarboxylative cross‐coupling catalyzed by copper and silver has been developed. Aromatic, secondary and tertiary aliphatic acids underwent high efficient decarboxylative processes with p‐toluenesulfonamide to afford the corresponding products. This method provides a practical approach for the flexible synthesis of sulfonamides from the readily affordable substrates. The catalyst is highly reusable and efficient, especially in terms of time and yield of the desired product.

show abstract

“…Figure presents the CAs of water droplet sample. Based on the obtained results, the CA between water and polymers was less than 90°, which indicates a good hydrophilicity behavior …”

Section: Resultsmentioning

confidence: 85%

Copper iodide nanoparticles‐decorated porous polysulfonamide gel: As effective catalyst for decarboxylative synthesis of N‐Arylsulfonamides

Alavinia

Ghorbani‐Vaghei

Rakhtshah

et al. 2020

Applied Organom Chemis

View full text Add to dashboard Cite

show abstract

“…As previously explained in the introduction, each technique has its own advantages and disadvantages, and different techniques, individual protocols, and data interpretation influence the CA obtained, make it difficult to compare data. 25 For this reason, this study was intended to evaluate the differences between the CA obtained when removing the lens from the blister and after immersed in different solutions, and so comparisons will be made only with the values obtained in this study. The physiological benefits of using Si-Hy lenses compared to traditional (low oxygen transmissibility) hydrogel lenses are well documented but CL-related dryness and discomfort still exist.…”

Section: Discussionmentioning

confidence: 99%

“…The CA analysis of hydrogel materials is commonly performed using sessile drop, captive bubble, or Wilhelmy plate. 25 According to the literature review of Campbell D. et al that present the CA terminology, methodology, and analysis, each technique has its own advantages and disadvantages. 25 The CA determines the angle at which a liquid/vapor interface meets a solid surface and, in the case of this study, estimates how a lens may interact with CL solutions.…”

mentioning

confidence: 99%

Effect of Lens Care Systems on Silicone Hydrogel Contact Lens Hydrophobicity

Lira

Silva

2017

Eye &Amp; Contact Lens: Science &Amp; Clinical Practice

View full text Add to dashboard Cite

show abstract

“…using a high-tech optical camera, the angle that was created between the baseline of the drop (solidliquid interface) and the tangent (liquid-air surface) was determined using Young-Laplace-Fit method [18,19].…”

Section: Surface Contact Anglementioning

confidence: 99%

Adherence of Pseudomonas aeruginosa onto surfactant-laden contact lenses

Mosuela

Mustafa

Gould

et al. 2018

Colloids and Surfaces B: Biointerfaces

View full text Add to dashboard Cite

There is an immense research interest to utilise contact lens (CLs) as a popular platform for ocular drug delivery. However, CLs are the major predisposing factors of bacterial keratitis which is commonly caused by adhesion of microbes such as Pseudomonas aeruginosa and Staphylococcus epidermidis. The aim of the current study is to explore the effect of surfactants; Poloxamer 188, Polysorbate 80 and Tetronic 90R4 (at 0.25% - 3% v/v) on the characteristics of CLs and on the adhesion abilities of Pseudomonas aeruginosa to the lenses' surfaces. CLs were formulated using a hydrophilic monomer; 2-hydroxyethyl methacrylate (HEMA) together with silicone-based polymer such as Poly dimethyl siloxane (PDMS) or 3,3,3-trifluoropropylsilane (FSA) then lenses were polymerized under UV light. The formulated CLs with surfactants were found to have an increased equilibrium water content (EWC) due to hydrophilic moiety present in surfactants. A relationship was deduced between EWC and surface contact angle of lenses containing surfactants; where an increased EWC was associated with a decrease in contact angle reflecting a more hydrophilic surfaces of CLs. Apart from the 3% Polysorbate 80 (p < .0001) CLs, all other formulations had light transmission values over 80%. Lenses with surfactants were found to have lower bacterial ATP concentration than lenses without surfactants. Poloxamer 188 in FSA lenses reduced bacterial adhesion from 4.22 × 10 ± 1.30 × 10 pM to 1.03 × 10 ± 4.86 × 10 pM, a reduction by 75.59% when compared to the control lenses (p = .002). Moreover, 1% Tetronic 90R4 in PDMS showed a reduction by 57.17% in ATP concentration. Polysorbate 80 in FSA exhibited the least bacterial adhesion with an average bacterial ATP concentration of 3.85 × 10 ± 2.61 × 10 pM; i.e 90.88% less bacterial ATP than control lenses (p = .001). Bioluminescence studies demonstrated a decrease in Pseudomonas aeruginosa adhesion to CLs containing surfactants without impairing the optical and mechanical characteristics of the lenses.

show abstract

Applicability of Contact Angle Techniques Used in the Analysis of Contact Lenses, Part 1

Cited by 40 publications

References 35 publications

Copper iodide nanoparticles‐decorated porous polysulfonamide gel: As effective catalyst for decarboxylative synthesis of N‐Arylsulfonamides

Copper iodide nanoparticles‐decorated porous polysulfonamide gel: As effective catalyst for decarboxylative synthesis of N‐Arylsulfonamides

Effect of Lens Care Systems on Silicone Hydrogel Contact Lens Hydrophobicity

Adherence of Pseudomonas aeruginosa onto surfactant-laden contact lenses

Contact Info

Product

Resources

About