Surface characterization of polyethylene terephthalate films treated by ammonia low-temperature plasma

Zheng, Zhiwen; Li, Ren; Feng, Wei; Zhai, Zhichen; Wang, Yingjun

doi:10.1016/j.apsusc.2012.04.038

Cited by 37 publications

(37 citation statements)

References 16 publications

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“…Dry processes such as ammonia or N 2 /H 2 plasma treatments of polymer surfaces suffer from a quick degradation of the thin functionalized surface layers. As it was shown before, the composition of the functionalized surface becomes comparable to the untreated layer after several days of ageing in air …”

Section: Introductionmentioning

confidence: 99%

Cyclopropylamine plasma polymers for increased cell adhesion and growth

Manakhov

Landová

Medalová

et al. 2016

Plasma Processes & Polymers

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Plasma polymers with NHx groups were deposited from cyclopropylamine in low pressure radio frequency (RF) discharges. The amount of NHx decreased with increasing average power Pav, whereas the layer dissolution in water decreased and high Pav led to a slight film swelling. The C2C12 cells demonstrated very high adhesion to the layers regardless of the deposition conditions. Although the surface chemistry of amine‐rich layers should enhance the cell proliferation, the WST‐1 assay, and immunocytochemistry revealed lower cell proliferation and viability on the layers exhibiting above 18% of relative thickness loss in water. Promising results were obtained on the layers with better water stability and bearing 7–10% of NHx.

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Section: Introductionmentioning

confidence: 99%

Cyclopropylamine plasma polymers for increased cell adhesion and growth

Manakhov

Landová

Medalová

et al. 2016

Plasma Processes & Polymers

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“…However, the processing range of the plasma method is generally only on the surface, and it is difficult to attach a hydrophilic group to the portion below the surface, so that the effect of improving the pore‐forming property of the film is not remarkable. The plasma treatment gave the material a certain performance only in a short period of time, and it will lapse after a period of time . The crosslinked silicon rubber obtained by the hydrophilic silica‐gel blending method has a more complicated and dense network structure.…”

Section: Results and Disscussionmentioning

confidence: 99%

Preparation of porous silicon rubber membranes by breath figure method

Wei

Guo

et al. 2019

J of Applied Polymer Sci

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A series of porous silicon rubber membranes with regularity and uniform size had been prepared by breath figure method form polydimethylsiloxane and hydrogen silicon oil (Si-H1341). Hydrophilicity and hydrophobicity of polymer, different methods of cast films, co-solvents, solid particle dispersants, temperature, solution concentration, and molecular weight of silicon rubber are considered and discussed in the article to analyze effects of experiment situations on porosity of porous silicon rubber membranes. Remarkably, using the method of blending silicon rubber with branch hydrophilic silica-gel, large area hydrophilic modification of the silicon rubber can be achieved, and it is easy to form pores with regular structure. With synergies of co-solvents, the excellent porosity with more rounded pore shape and better regularity is acquired. The results indicate that the pore size of the silicon were affected greatly by the addition of co-solvent, the boiling point of solvent, molecular weight of raw materials, and reaction temperature.

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“…Ultimately, we took inspiration from the original strategy of Pelham and Wang 10 , where 3aminopropyltrimethoxysilane treated glass creates surface amines, and glutaraldehyde is used as a crosslinker to bond polyacrylamide. Although the chemistry of silica glass is distinct from PET, there are well-established methods for introducing amine groups onto PET, such as ammonia plasma 46 , ethylenediamine 47 and polyvinylamine 48,49 . We chose ethylenediamine to install surface amines because it is liquid at room temperature, non-hazardous, and is easily rinsed away with methanol and/or ethanol.…”

Section: Discussionmentioning

confidence: 99%

Development of anin vitroExperimental Model for Investigating the Effect of Matrix Stiffness on Epithelial Barrier Permeability

Roy

Turner-Brannen

West

2019

Preprint

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Epithelial cells are well-known to be modulated by extracellular mechanical factors including substrate stiffness. However, the effect of substrate stiffness on an epithelial cell's principal function -creating an effective barrier to protect the underlying tissue -cannot be directly measured using existing experimental techniques. We developed a strategy involving ethylenediamine aminolysis and glutaraldehyde crosslinking to chemically graft polyacrylamide hydrogels with tunable stiffness to PET Transwell membranes. Grafting success was evaluated using spectroscopic methods, scrape tests, and extended incubation in culture. By assessing apical to basolateral transfer of fluorescent tracers, we demonstrated that our model is permeable to biologically relevant molecules and usable for direct measurement of barrier function by calculating paracellular permeability.We found that BEAS-2B epithelial cells form a more effective barrier on stiff substrates, likely attributable to increased cell spreading. We also observed barrier impairment after treatment with transforming growth factor beta, indicating loss of cell-cell junctions, validating our model's ability to detect biologically relevant stimuli. Thus, we have created an experimental model that allows explicit measurement of epithelial barrier function for cells grown on different substrate stiffnesses. This model will be a valuable tool to study mechanical regulation of epithelial and endothelial barrier function in health and disease.

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Surface characterization of polyethylene terephthalate films treated by ammonia low-temperature plasma

Cited by 37 publications

References 16 publications

Cyclopropylamine plasma polymers for increased cell adhesion and growth

Cyclopropylamine plasma polymers for increased cell adhesion and growth

Preparation of porous silicon rubber membranes by breath figure method

Development of anin vitroExperimental Model for Investigating the Effect of Matrix Stiffness on Epithelial Barrier Permeability

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