Improvement of blood compatibility on cellulose dialysis membrane2. Blood compatibility of phospholipid polymer grafted cellulose membrane

Ishihara, Kazuhíko; Takayama, Ryuichi; Nakabayashi, Nobuo; Fukumoto, Kikuko; Aoki, Junji

doi:10.1016/0142-9612(92)90190-y

Cited by 61 publications

(15 citation statements)

References 10 publications

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“…This functionalized membranes type was used for the extraction and separation of metal ions such as copper and cadmium . Organic polymers used for the preparation of this membranes type are of different nature and origin, and must be chemically and thermally stable like fluoro‐polymers, cellulosic materials, polysulfides, polycarbonates, and polyacrylates . Moreover, these polymers are widely used as supports for the development of grafted polymer membranes.…”

Section: Introductionmentioning

confidence: 99%

Grafted polymer membranes with extractive agents for the extraction process of VO₂⁺ ions

Kamal

Eljaddi

Atmani

et al. 2016

Polymers for Advanced Techs

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To conduct experiments related to the facilitated extraction phenomenon and recovery of vanadium ions VO2+, two grafted polymer membranes were prepared; containing respectively cholic acid and azithromycin as extractive agents and the obtained membranes were characterized. All experiments for the facilitated extraction phenomenon of these ions were carried out. Kinetic and thermodynamic models, based on the interaction of the substrate S (VO2+) with the extractive agent T, and the diffusion of the formed entity (TS) through the membrane were developed, to determine the macroscopic parameters, permeability P and initial fluxes J0, and the microscopic parameters, association constants Kass and apparent diffusion coefficients D*, related to the formation of entities TS and their diffusion. A clear evolution of these parameters, depending on various factors (substrate concentration C0, extractive agent concentration and feed and receiving phases temperature), and high permeabilities for this extraction phenomenon of VO2+ ions were observed for this membrane type. Copyright © 2016 John Wiley & Sons, Ltd.

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Section: Introductionmentioning

confidence: 99%

Grafted polymer membranes with extractive agents for the extraction process of VO₂⁺ ions

Kamal

Eljaddi

Atmani

et al. 2016

Polymers for Advanced Techs

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“…Optical resolution chromatography involves the use of stationary phases possessing chiral ; particular mention is due to new products, whose peculiar features suggest their potential application as blood dialysis membranes [112,113], food packaging materials [114] and, as in the case of chitosanpolyvinyl sulfate electrolyte complexes, as membranes for active and selective transportation of some metal ions [115].…”

Section: Polysaccharides For Biotechnology Separatory Products and Lmentioning

confidence: 99%

Industrial applications of polysaccharides

Lapasin

Pricl

1995

Rheology of Industrial Polysaccharides: Theory and Applications

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The impact of polysaccharides in industrial applications is enormous!. The usefulness of these water-soluble carbohydrate polymers in industry undoubtedly relies on the wide range of their functional properties. Chief among polysaccharide characteristics is their ability to modify the properties or" aqueous environments, that is their capacity to thicken, chelate, emulsify, stabilize, encapsulate, flocculate, swell and suspend, or to form gels, films and membranes. Polysaccharides are natural polymers from renewable sources; therefore, peculiar features like biocompatibility, biodegradability, bioadhesivity and nontoxicity, coupled with wide availability and usually low costs, account for their steadily increasing exploitation in the formulation of products for food, biomedical and cosmetic applications.Polysaccharides, both natural gums and their derivatives, are classified as specialty chemicals. Quite generally, the term specialty chemicals refers to those products which are commercialized on the basis of their performance rather than their physical properties. These substances can be further divided into two main categories: the functional chemicals, which play a specific role in a variety of markets, and the market-directed chemicals, which are oriented to a specific field or application, and to which category polysaccharides generally belong. In the following sections we will briefly describe the principal industrial applications of polysaccharides. ! As in §1.3, the references cited in this chapter represent a selected list of papers and books which have appeared in literature mostly since 1988. R. Lapasin et al., Rheology of Industrial Polysaccharides: Theory and Applications © Springer Science+Business Media Dordrecht 1995 2.1.1 Polysaccharides infoods: function versus gum usedCarbohydrate polymers are widely used in food processing and preparation [1][2][3][4][5][6][7][8]. Sometimes they are present for technological reasons, e.g. as process aids, to stabilize emulsions and suspensions, and to give the physical structure required for packaging or distribution. More often, however, the thickening and gelling properties of these biopolymers are exploited to enhance or standardize the eating quality of a product [1].Many food products are emulsions, that is a mixture of two immiscible liquids in which one phase is dispersed throughout the other as small, discrete droplets. Polysaccharides can assist in obtaining a fine dispersion and in maintaining the homogeneous mixture; therefore, it is not always easy to distinguish between emulsifier and stabilizer [2]. Foams are related to emulsions, being a dispersion of gas (or gases) in a liquid (or solid), and polysaccharides can be conveniently used to modify the interfacial tension and obtain a stable, firm foam. Suspending agents are those substances that are used to uniformly disperse solid particles through a liquid phase, and the relative stabilizers help in preventing particle settling.A thickening agent, as the word implies, increases the viscosity of a l...

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“…1 Although the long-term patency rates after pressed clot formation, platelet adhesion, and activation femorodistal bypass operations using ePTFE prostheses when blood came in contact with the MPC polymer. 3,5,6,8,9,15 have improved due to recent technical modifications, The mechanism of these properties is due to the dramatic the results are still poor compared with those of autovein reduction of protein adsorption from the plasma. [4][5][6][7] To bypass operations.…”

Section: Introductionmentioning

confidence: 95%

“…2 Small-diameter vascular prostheses apply the MPC polymer for improvement of blood compatshould, in such cases, have sufficient flexibility to allow ibility of biomedical devices, surface modification techniques including coating, grafting, and blending with the MPC polymer were investigated. [14][15][16][17] Among them, blending of the MPC polymer as a polymeric additive into segCorrespondence to: Dr. K. Ishihara (e-mail: kazu@i-mde.tmd.ac.jp) mented poly(etherurethane) (SPU) was a useful technique Contract grant sponsor: Ministry of Education, Japan; contract grant number: 07680934 to obtain both excellent mechanical properties and blood compatibility. 16,17 In our previous articles, an SPU/MPC polymer blend was prepared and its fundamental properties prosthesis was dried in the atmosphere overnight, the residual solvent was removed completely by vacuum drying.…”

Section: Introductionmentioning

confidence: 99%

“…suitable autogenous vein grafts, a serious problem is introRecently, the blood compatibility and biocompatibility duced, for example, in coronary artery bypass grafting of phospholipid polymers containing a 2-methacryloyloxy-(CABG), because the results of CABG with expanded ethyl phosphorylcholine (MPC) unit were investigated in polytetrafluoroethylene (ePTFE) prostheses have not been vitro and ex vivo. [3][4][5][6][7][8][9][10][11][12][13][14][15] The MPC polymers effectively supsatisfactory.1 Although the long-term patency rates after pressed clot formation, platelet adhesion, and activation femorodistal bypass operations using ePTFE prostheses when blood came in contact with the MPC polymer. …”

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confidence: 99%

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Short-termin vivo evaluation of small-diameter vascular prosthesis composed of segmented poly(etherurethane)/2-methacryloyloxyethyl phosphorylcholine polymer blend

Yoneyama

Ishihara

Nakabayashi

et al. 1998

J. Biomed. Mater. Res.

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A small-diameter vascular prosthesis with potential for clinical use was prepared from a Dacron prosthesis coated with nonthrombogenic polymeric materials. As a coating material, segmented poly(etherurethane) (SPU; Tecoflex 60) was blended with a phospholipid polymer, 2-methacryloyloxyethyl phosphorylcholine (MPC) polymer, which has excellent blood compatibility. The Dacron prosthesis, 2 mm in diameter, was immersed in a solution of the SPU/MPC polymer blend and dried to evaporate the solvent. The SPU/MPC polymer prosthesis was nonwater permeable and could be sewn to a natural vessel by a microsurgical technique. The SPU solution was used instead of the SPU/MPC polymer blend solution to prepare a control prosthesis (SPU prosthesis). The SPU/MPC polymer prosthesis and the SPU prosthesis were placed as interposition grafts in rabbit carotid arteries. A massive red thrombus became attached to the surface of the SPU prosthesis as early as 90 min after implantation. In the SPU/MPC polymer prosthesis case, the surface was maintained clear even after 5-day implantation. These observations indicated that the MPC polymer in the SPU could improve the nonthrombogenicity of SPU, and the SPU/MPC polymer blend had potential for preparation of small-diameter vascular prostheses.

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Improvement of blood compatibility on cellulose dialysis membrane2. Blood compatibility of phospholipid polymer grafted cellulose membrane

Cited by 61 publications

References 10 publications

Grafted polymer membranes with extractive agents for the extraction process of VO₂⁺ ions

Grafted polymer membranes with extractive agents for the extraction process of VO₂⁺ ions

Industrial applications of polysaccharides

Short-termin vivo evaluation of small-diameter vascular prosthesis composed of segmented poly(etherurethane)/2-methacryloyloxyethyl phosphorylcholine polymer blend

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Improvement of blood compatibility on cellulose dialysis membrane2. Blood compatibility of phospholipid polymer grafted cellulose membrane

Cited by 61 publications

References 10 publications

Grafted polymer membranes with extractive agents for the extraction process of VO2+ ions

Grafted polymer membranes with extractive agents for the extraction process of VO2+ ions

Industrial applications of polysaccharides

Short-termin vivo evaluation of small-diameter vascular prosthesis composed of segmented poly(etherurethane)/2-methacryloyloxyethyl phosphorylcholine polymer blend

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Product

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Grafted polymer membranes with extractive agents for the extraction process of VO₂⁺ ions

Grafted polymer membranes with extractive agents for the extraction process of VO₂⁺ ions