Newly developed biocompatible membrane and effects of its smoother surface on antithrombogenicity

Fukuda, Makoto; Miyazaki, Masaru; Hiyoshi, Tatsuo; Iwata, Michitaka; Hongou, Tomoko

doi:10.1002/(sici)1097-4628(19990606)72:10<1249::aid-app3>3.0.co;2-5

Cited by 19 publications

(10 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The values in Table II for most of the cases indicate that the roughness increased initially with the addition of MSG. 34,35 The contact angles of the different membranes were found to predict the hydrophilic characteristics of the membranes. These roughness parameters with further increases of MSG started to decrease.…”

Section: Resultsmentioning

confidence: 99%

Influence of monosodium glutamate additive on the morphology and permeability characteristics of polyamide dialysis membranes

Shakaib

Ahmed

Yunus

et al. 2012

J of Applied Polymer Sci

View full text Add to dashboard Cite

Membranes were prepared with dope solutions of various concentrations of polyamide and monosodium glutamate (MSG) additive for dialysis applications. The results show that the membranes with higher MSG concentrations had higher water uptakes and porosities. The membranes were characterized with scanning electron microscopy (SEM) and atomic force microscopy techniques and evaluated in terms of the permeability of solutes, such as urea and creatinine. The cross-sectional structure of the membranes prepared without MSG additive or with a low MSG concentration were dense, and their surfaces consisted of large-sized nodule aggregates. The permeation of solutes was less through these membranes. When the amount of additive in the membrane solution was sufficient, macrovoids were seen in the SEM images, and the sizes of nodules were small, which caused an increase in the diffusive permeability of solutes. The surfaces of the membranes with higher MSG concentrations were found to be smooth; this could be useful for the dialysis process. The contact angles of these membranes were also lower; this indicated that this additive improved the hydrophilicity of the membranes.

show abstract

Section: Resultsmentioning

confidence: 99%

Influence of monosodium glutamate additive on the morphology and permeability characteristics of polyamide dialysis membranes

Shakaib

Ahmed

Yunus

et al. 2012

J of Applied Polymer Sci

View full text Add to dashboard Cite

show abstract

“…It has been generally accepted that the surface roughness greatly affected the biocompatibility of materials. Fukuda et al46 demonstrated that a hemodialysis membrane with smoother inner surface possessed better hemocompatibility. Lee et al47 observed the effect of fiber diameter (surface curvature) on the growth behavior of cells.…”

Section: Discussionmentioning

confidence: 99%

Controlled degradation of natural rubber and modification of the obtained telechelic oligoisoprenes: Preliminary study of their potentiality as polyurethane foam precursors

Saetung¹,

Rungvichaniwat²,

Campistron³

et al. 2010

J of Applied Polymer Sci

View full text Add to dashboard Cite

Telechelic oligoisoprenes were successfully prepared by the selective controlled degradation of natural rubber, a renewable source, via epoxidation and cleavage reactions. The molar mass of the oligoisoprene product obtained depends on the degree of epoxidation of the starting materials. The chemically modified structures obtained via epoxidation, hydrogenation, and ring opening of epoxide groups were also studied, and the chemical structures and thermal properties of the oligoisoprene products were determined. Moreover, the preliminary study of preparation of hydroxytelechelic natural rubber (HTNR)-based polyurethane foam was performed. A novel HTNR-based polyurethane foam was successfully prepared and its thermal properties were investigated and the results indicated that the HTNR-based polyurethane foam has a good low temperature flexibility.

show abstract

“…The fractured membrane was soaked in ethanol, t ‐butanol/ethanol (50/50 vol %), and t ‐butanol successively for 30 min (two times) each to substitute alcohol for water in the membrane, and then it was freeze‐dried in vacuo for 3 days. The origin of this method was the one reported by Fukuda et al27 After platinum was spattered onto the dry membrane, the top surface and cross section of the membrane were observed with a scanning electron microscopy (SEM) instrument equipped with a field emission gun at an accelerated voltage of 3 kV (JSM‐840F, JEOL, Ltd., Tokyo, Japan).…”

Section: Methodsmentioning

confidence: 99%

Experimental and Theoretical Investigations on the Magnetic‐Field‐Induced Variation of Surface Energy of Co₃O₄ Crystal Faces

Wang¹,

Chen²

2010

Chemistry A European J

View full text Add to dashboard Cite

Magnetic fields have long been reported to influence the structures and physical properties of materials, such as crystal structures, [1] electronic properties, [2] magnetic and mechanical properties.[3] Based on the interactions between materials and the magnetic fields themselves, there is potential for the design of many devices, including magnetic actuators, and in many systems for the investigation of electron-transport properties.[4] Although magnetic fields were, for a long time, considered to only have weak influence on the synthesis of materials, recent advances indicate that the real situation is not as previously assumed. It has been found that magnetic fields can induce the assembly of ferromagnetic (FM) nanocrystallites along magnetic lines of force, and also the anisotropic growths of single-crystal materials.[5] Moreover, materials synthesized under magnetic fields usually exhibit different properties, such as enhanced saturated magnetization and different ions arrangement in the lattice. [5] Although it is generally realized that magnetic fields can influence the materials growth, hitherto the pathways by which they work remain unknown. Theoretical work on the influence of magnetic fields on materials synthesis is rare. In this paper, Co 3 O 4 nanoparticles are selected as objects for investigating the effects of external magnetic fields on nanomaterial growth. Experimental results show that external magnetic fields can result in the morphology of Co 3 O 4 nanoparticles changing from irregular spheres to nanocubes. Then in the theoretical investigations, the effects of external magnetic fields on the competitive growth between {111} and {100} faces and on the morphology of Co 3 O 4 crystals are simulated. It is shown that the energy of both faces decrease under external magnetic fields; however, the energy of {100} faces decrease more rapidly, so that the energy of the {100} faces is lower than that of {111} faces and the growth rates along {100} and {111} faces are also different. As a result the {100} faces are the growth limiting form.Co 3 O 4 particles are chosen for straightforwardness in discussing the effect of magnetic fields. Since they are not ferromagnetic, interaction between their intrinsic magnetic fields and external magnetic fields can be eliminated. The possibility that the as-formed nuclei assemble by magnetic dipole-dipole interactions and form one-dimensional structure can also be ruled out. The synthesis is based on a recent publication and is further modified.[6] We denote the samples synthesized in the absence and presence of magnetic fields as S1 and S2, respectively. X-ray diffraction (XRD) patterns of S1 and S2 show that they are pure Co 3 O 4 (shown in Figure 1 a). The average diameter of particles calculated by Scherrers equation for both samples are about 15 nm, in accordance with transmission electron microscopy (TEM) observations, indicating these grains are of high-quality single-crystalline particles. TEM images of S1 and S2 (Figure 1 b and 1c) show that S2 prod...

show abstract

Newly developed biocompatible membrane and effects of its smoother surface on antithrombogenicity

Cited by 19 publications

References 14 publications

Influence of monosodium glutamate additive on the morphology and permeability characteristics of polyamide dialysis membranes

Influence of monosodium glutamate additive on the morphology and permeability characteristics of polyamide dialysis membranes

Controlled degradation of natural rubber and modification of the obtained telechelic oligoisoprenes: Preliminary study of their potentiality as polyurethane foam precursors

Experimental and Theoretical Investigations on the Magnetic‐Field‐Induced Variation of Surface Energy of Co₃O₄ Crystal Faces

Contact Info

Product

Resources

About

Newly developed biocompatible membrane and effects of its smoother surface on antithrombogenicity

Cited by 19 publications

References 14 publications

Influence of monosodium glutamate additive on the morphology and permeability characteristics of polyamide dialysis membranes

Influence of monosodium glutamate additive on the morphology and permeability characteristics of polyamide dialysis membranes

Controlled degradation of natural rubber and modification of the obtained telechelic oligoisoprenes: Preliminary study of their potentiality as polyurethane foam precursors

Experimental and Theoretical Investigations on the Magnetic‐Field‐Induced Variation of Surface Energy of Co3O4 Crystal Faces

Contact Info

Product

Resources

About

Experimental and Theoretical Investigations on the Magnetic‐Field‐Induced Variation of Surface Energy of Co₃O₄ Crystal Faces