Sökning: "poly urethane urea"

Hittade 5 avhandlingar innehållade orden poly urethane urea.

1. 1. Structure Dependent Chemical and Biological Interactions of Poly(urethane urea)s

   Författare :Katrin Gisselfält; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; biomaterial; synthesis; hydrogen bonding; biological interactions; structure; properties; poly urethane urea ;

   Sammanfattning : Poly(urethane urea)s, PUURs, are widely used in both industrial and biological applications because of excellent physical and mechanical properties and good biocompatibility in a variety of applications. Both the processing and the tailoring of specific properties of PUUR demand great knowledge of structure-property relationships. LÄS MER

3. 2. Biodegradable Thermoplastic Elastomers

   Författare :Basse Asplund; Jöns Hilborn; Tim Bowden; Iskender Yilgör; Uppsala universitet; []
   Nyckelord :Chemistry; poly urethane ; poly urethane urea ; biomaterial; biodegradable; polymer; thermoplastic elastomer; haemocomatible; tissue engineering; biocompatible; Kemi;

   Sammanfattning : A novel strategy for synthesising segmented poly(urethane urea) (PUU) without using a chain extender but nevertheless with the opportunity to vary the hard segment content has been developed. The strategy is based on amine formation from isocyanate upon reaction with water. LÄS MER

4. 3. Amphiphilic Polymers as Additives in Biomedical Polyurethanes. Surface Properties and Morphology

   Författare :Maria Kober; Centrum för analys och syntes; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; polymer micelles; phase separation; migration; poly ethylene oxide ; surface enrichment; morphology; polyurethane; additives; Surface modification; amphiphilic polymers; polymer blends; Polymer technology; biopolymers; Polymerteknik;

   Sammanfattning : The aim of this work was to achieve surface modification of two biomedical polyurethanes and one poly(urethane urea) through the addition of small amounts of amphiphilic copolymers in solution. The matrix polymers used were the poly(ether urethane)s Pellethane 2363-80AE (P80) and 2363-75D (P75) and a poly(ether urethane urea) similar to Biomer (PUUR). LÄS MER

5. 4. Guided Regeneration of the Human Skin : in vitro and in vivo studies

   Författare :Erika Nyman; Gunnar Kratz; Fredrik Huss; Joakim Henricson; Lars B. Dahlin; Linköpings universitet; []
   Nyckelord :LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES;

   Sammanfattning : Every day and in all parts of the world, humans experience different grades of wounding and tissue loss of the skin, thus initiating one of the most complex biological processes. Acute and chronic wounds, as well as the additional problem of skin scarring, involve not only great suffering for the patient but also extensive health care costs for the society. LÄS MER

7. 5. In vitro and in vivo studies on biodegradable matrices for autotransplantation

   Författare :Carl-Johan Gustafson; Karolinska Institutet; Karolinska Institutet; []
   Nyckelord :In vitro; in vivo; dermis; matrix; autotransplantation; culture; keratinocytes; urothelium; tissue engineering; PUUR; macroporous spheres ; guided tissue regeneration;

   Sammanfattning : Tissue engineering (TE), one of the most rapidly growing fields of life science, is an interdisciplinary area in which technical, biological and medical expertise co-fertilize on another with the ultimate aim of restoring, maintaining or improving tissues and/or organs. This purpose links TE closely to research concerning reconstructive plastic surgery. LÄS MER