Improving the adhesion of poly(ethylene terephthalate) fibers to poly(hydroxyethyl methacrylate) hydrogels by ozone treatment: Surface characterization and pull-out tests

Ferreira, Lino; Evangelista, Marta B.; Martins, M. Cristina L.; Granja, Pedro L.; Esteves, J. L.; Barbosa, Mário A.

doi:10.1016/j.polymer.2005.08.033

Cited by 32 publications

(21 citation statements)

References 30 publications

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“…Many studies have been conducted on the ozone modification of polymer surfaces in the last decade 8, 10–19. However, most of these studies were conducted in gaseous phase, only a few explored ozonation of polymers in distilled water, as well as in aqueous solutions of iso‐propanol and ammonia 16–19.…”

Section: Introductionmentioning

confidence: 99%

An investigation into surface modification of polyethylene films for hydrophilicity enhancement by catalytic ozonation

Mastan

Doan

2012

J of Applied Polymer Sci

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For a conventional polyethylene film, ozonation was conducted to increase its surface hydrophilicity. Copper sulfate was found effective as a catalyst in aqueous ozonation to increase the generation of surface peroxides significantly, which is the essential step for hydrophilicity enhancement. The percentage increase in peroxide generation could range from 41% to 58% by aqueous catalytic ozonation over its noncatalyzed gaseous counterpart. The optimum concentration of copper sulfate was found to be 0.05 g/L. After adding the catalyst, the length of ozonation could be significantly reduced so that the bulk mechanical strength of the films, represented by tensile strength, could be well preserved after ozonation. A novel kinetic model for the aqueous ozonation was proposed. This model was developed by combing the reaction mechanism of gaseous ozonation of polyethylene films with that of ozone self-decomposition in water. The peroxide generation also increased with the applied ozone dose. The surface morphology and contact angle of the film were all examined before and after ozonation.

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Section: Introductionmentioning

confidence: 99%

An investigation into surface modification of polyethylene films for hydrophilicity enhancement by catalytic ozonation

Mastan

Doan

2012

J of Applied Polymer Sci

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“…Droplet profiles were fitted using the Young–Laplace mathematical function. The contact angle respective to each film was calculated by extrapolating the time‐dependent curve to zero . Three replicates per surface treatment were analyzed.…”

Section: Methodsmentioning

confidence: 99%

Cecropin–Melittin Functionalized Polyurethane Surfaces Prevent Staphylococcus epidermidis Adhesion without Inducing Platelet Adhesion and Activation

Querido

Felgueiras

Rai

et al. 2018

Adv Materials Inter

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Infections and thrombus formation are major concerns for the success of blood‐contacting medical devices. Antimicrobial coatings based on antimicrobial peptides (AMPs) are described as promising strategies to fight biomaterial‐associated infections. However, their efficiency in the presence of plasma and their effect on platelets adhesion/activation, essential for blood contact applications, is not known. In this work, the AMP cecropin–melittin (CM) is covalently immobilized onto polyurethane (PU) films envisaging a coating for intravascular catheters. Immobilization is done by dip‐coating of a layer of gold nanoparticles (Au NPs) functionalized with NH2 and COOH terminated polyethylene glycol (PEG). Surfaces characterized using scanning electron microscopy (SEM), X‐ray photoelectron spectroscopy (XPS), quartz crystal microbalance with dissipation (QCM‐D), and colorimetric assays reveal a stable and homogeneous coating distribution. CM coating significantly reduces Staphylococcus epidermidis adhesion to PU films (≈80% in PBS). Its bactericidal activity is not affected in the presence of 1% human plasma (hPlasma) proteins with 65% reduction on viable bacteria comparing to PU. Moreover, CM coating is able to prevent platelet adhesion/activation to PU films (≈95% in PBS). This effect is also observed when surfaces are precoated with hPlasma. Overall, the developed antimicrobial coating demonstrates great potential to prevent bacterial infections on PU devices without instigating platelet adhesion/activation.

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“…Among the surface modification techniques, ozonation is widely applied [6][7][8][9][10][11]. When polymers are exposed to ozone, active peroxide groups can be introduced onto the surface.…”

Section: Introductionmentioning

confidence: 99%

“…The active peroxide groups are capable of initiating graft polymerization of vinyl monomers with hydrophilic groups. Consequently, the hydrophilicity of the polymer surfaces can be improved [6][7][8][9][10][11]. In comparison with other surface modification techniques such as plasma treatment, irradiation with gamma-rays, corona discharge, ion beam treatment, UV radiation, etc., ozonation has the advantage of introducing peroxide groups uniformly even with complicated shapes [6,11,12].…”

Section: Introductionmentioning

confidence: 99%

Hydrophilicity Enhancement of High‐Density Polyethylene Film by Ozonation

Doan

2009

Chem Eng & Technol

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High-density polyethylene (HDPE) films were ozonated in the gas phase and in distilled water, respectively, to improve their surface hydrophilicity. The efficiency of ozonation conducted in the gaseous and aqueous phases was compared. The results indicated that the aqueous ozonation was more effective than its gaseous counterpart in terms of peroxide generation. The results also showed that the concentration of peroxides generated on the film surfaces increased with the applied ozone dose and ozonation time in both phases. It was found that the peroxides generated by aqueous ozonation were accessible to monomers for graft polymerization. The hydrophilicity of the HDPE films was significantly improved by graft polymerization of acrylamide (AAm) initiated by the peroxides. The contact angle reduction from 74.9°to 38.6°indicated the successful graft polymerization. The successful graft polymerization of AAm was further confirmed by the formation of new peaks corresponding to amide groups in FTIR spectra and by scanning electron microscope images.

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Improving the adhesion of poly(ethylene terephthalate) fibers to poly(hydroxyethyl methacrylate) hydrogels by ozone treatment: Surface characterization and pull-out tests

Cited by 32 publications

References 30 publications

An investigation into surface modification of polyethylene films for hydrophilicity enhancement by catalytic ozonation

An investigation into surface modification of polyethylene films for hydrophilicity enhancement by catalytic ozonation

Cecropin–Melittin Functionalized Polyurethane Surfaces Prevent Staphylococcus epidermidis Adhesion without Inducing Platelet Adhesion and Activation

Hydrophilicity Enhancement of High‐Density Polyethylene Film by Ozonation

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