Surface energy of ethylene-co-1-butene copolymers determined by contact angle methods

Mykhaylyk, T. A.; Evans, Stephen D.; Fernyhough, Christine M.; Hamley, Ian W.; Henderson, J. Gordon

doi:10.1016/s0021-9797(02)00188-1

Cited by 23 publications

(19 citation statements)

References 30 publications

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“…The nanoparticles tended to be attracted to each other through van der Waals forces and led to the agglomeration and corresponding reduction in the surface energy 28. The reduction in the surface energy then caused an increase in the contact angle value, as reported by others 30, 31…”

Section: Resultssupporting

confidence: 64%

Optimizing the incorporation of silica nanoparticles in polysulfone/poly(vinyl alcohol) membranes with response surface methodology

Leo

Mohammad

2011

J of Applied Polymer Sci

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The addition of silica nanoparticles and poly(vinyl alcohol) (PVA) to polysulfone (PSF) membranes was used to modify the membrane morphology and enhance membrane performance. The central composite design of the response surface methodology was used to predict the maximum permeability and real salt rejection (R real ) of the PSF membranes. The factors affecting the permeability and R real values of the PSF membranes were the silica (0-12 wt % PSF) and PVA (0-2 wt % PSF) contents. The optimized responses, membrane permeability, and R real obtained experimentally were 61.9260 L m À2 h À1 bar À1 and 97.5850%, respectively, with deviation from the predicted values of 34.72 and 15.84%, respectively. In the further characterization, the contact angle results showed that PVA was important in stabilizing the nanoparticle surfaces to prevent agglomeration in the polymeric matrix. The tensile strength test confirmed that the addition of silica nanoparticles improved the mechanical strength of the PSF membranes. However, the addition of PVA had a weakening effect on the mechanical strength of the PSF membranes. The addition of silica nanoparticles and PVA affected the typical asymmetric structures of the PSF membrane less, as shown in the scanning electron micrographs. This may have been due to the good incorporation of additives in the PSF membranes, as observed from the energy-dispersive X-ray and Fourier transform infrared spectroscopy results.

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Section: Resultssupporting

confidence: 64%

Optimizing the incorporation of silica nanoparticles in polysulfone/poly(vinyl alcohol) membranes with response surface methodology

Leo

Mohammad

2011

J of Applied Polymer Sci

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“…More detailed information about the surface free energy analysis method and its limitations can be found in the following articles 13–16…”

Section: Methodsmentioning

confidence: 99%

“…where u i : contact angle corresponding to liquid i g L LW , g L þ , g L 2 : energy components of liquid i g S LW , g S þ , g S 2 : energy components of the surface More detailed information about the surface free energy analysis method and its limitations can be found in the following articles. [13][14][15][16] Surface roughness…”

Section: Contact Angle and Surface Energy Determinationmentioning

confidence: 99%

Fibronectin modulates osteoblast behavior on Nitinol

Muhonen

Fauveaux

Olivera

et al. 2008

J Biomedical Materials Res

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We have previously demonstrated that primary rat osteoclasts behave differently when cultured on austenite and martensite Nitinol. In this study, we coated the two phases of Nitinol with plasma fibronectin and studied if this modifies the proliferation and cell cycle of MC3T3-E1 osteoblasts. The influence of the crystalline structure of Nitinol on the remodeling and conformation of fibronectin was also studied. The results on austenite demonstrated that fibronectin was more strongly remodeled and the cells spread better compared with the martensite phase. Interestingly, the conformation of the protein showed no differences between austenite and martensite. In addition, fibronectin improved cell proliferation in both phases, but the effect of fibronectin coating was stronger on the austenite surface. In addition, in both Nitinol phases, the proportion of cells in the G(1) phase was observed to grow in the presence of fibronectin. This could indicate cell differentiation on Nitinol.

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“…Therefore, the surface polarity of an adsorbent should be characterized to explain its interactions with proteins. The surface polarity of solids can be obtained from contact angles measurements using different test liquids [18,19].…”

Section: Introductionmentioning

confidence: 99%

Affinity membrane chromatography: relationship of dye-ligand type to surface polarity and their effect on lysozyme separation and purification

Arıca

Yılmaz

Yalçın

et al. 2004

Journal of Chromatography B

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Surface energy of ethylene-co-1-butene copolymers determined by contact angle methods

Cited by 23 publications

References 30 publications

Optimizing the incorporation of silica nanoparticles in polysulfone/poly(vinyl alcohol) membranes with response surface methodology

Optimizing the incorporation of silica nanoparticles in polysulfone/poly(vinyl alcohol) membranes with response surface methodology

Fibronectin modulates osteoblast behavior on Nitinol

Affinity membrane chromatography: relationship of dye-ligand type to surface polarity and their effect on lysozyme separation and purification

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