Calcium effect on the membrane preparation of segmented poly(ether/urethane/amide) (PEUN) as a biomedical material.

Calcium effect on the membrane preparation of segmented poly(ether/urethane/amide) (PEUN) as a biomedical material. Research Abstract Details 

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Calcium effect on the membrane preparation of segmented poly(ether/urethane/amide) (PEUN) as a biomedical material. Abstract Text:

K Kawashima,H Sato,

Poly(ether/urethane/amide) (PEUN), a segmented polyurethane, was characterized concerning phase relationship, viscosity in solution, hydraulic permeability, mechanical properties, and in vivo biocompatibility with tissue and blood. PEUN was dissolved at the highest concentration of 0.5% in N,N-dimethylformamide (DMF). Addition of calcium chloride at concentrations up to 3.1% progressively increased the solubility of PEUN in DMF PEUN2 membrane was prepared by casting from mixtures of PEUN, 3% calcium chloride, and DMF, from which calcium chloride was sufficiently removed. The PEUN2 membrane thus obtained was compared with PEUN membrane which was prepared by casting from DMF solution without the addition of calcium chloride. The water permeability across PEUN2 membrane was higher than that across PEUN membrane. PEUN2 membrane in the swollen state exhibited a lower tensile modulus and much greater elastic property than PEUN membrane. Tissue compatibility of PEUN2 membrane was better than that of PEUN membrane. Thromboresistance of PEUN membrane was good, while PEUN2-coated surface was thrombogenic to some extent in vivo. Our characterization suggested that PEUN2 membrane is more hydrophilic than PEUN membrane, possibly because of the assembly of polar groups on the segments of PEUN molecules which show affinity to calcium chloride in membrane processing.

Calcium effect on the membrane preparation of segmented poly(ether/urethane/amide) (PEUN) as a biomedical material. Publishing Authors By Initials

K Kawashima,H Sato,

For similar natural sciences: chemistry: chemistry, physical: viscosity research abstracts see: natural sciences: chemistry: chemistry, physical: viscosity research

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Calcium effect on the membrane preparation of segmented poly(ether/urethane/amide) (PEUN) as a biomedical material. Journal Published:

PUBLICATION TYPE: Journal Article

Journal: Journal of biomaterials science. Polymer edition

VOLUME: 8

Page Numbers: 467-80

Journal Abbreviation:

ISSN: 0920-5063

DAY: 20

MONTH: 02

YEAR: 1997

Calcium effect on the membrane preparation of segmented poly(ether/urethane/amide) (PEUN) as a biomedical material. Information

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LANGUAGE: eng

NlmUniqueID: 9007393

Calcium effect on the membrane preparation of segmented poly(ether/urethane/amide) (PEUN) as a biomedical material. Keywords Mesh Terms:

KEYWORDS: Viscosity

MESH TERMS: prevention & control

Chemical & Substance for Abstract: Calcium effect on the membrane preparation of segmented poly(ether/urethane/amide) (PEUN) as a biomedical material. Information

Substance Name: Calcium Chloride

Registry Number: 10043-52-4

Grant and Affiliation Information for Calcium effect on the membrane preparation of segmented poly(ether/urethane/amide) (PEUN) as a biomedical material.

AFFILIATION: Department of Polymer Chemistry, Kyoto University, Japan.

Country: NETHERLANDS

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MEDLINETA: J Biomater Sci Polym Ed

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