Sökning: "Biodegradable polymers"

Visar resultat 21 - 25 av 58 avhandlingar innehållade orden Biodegradable polymers.

1. 21. Tuning the long-term properties to control biodegradation by surface modifications of agricultural fibres in biocomposites

   Författare :Thorsak Kittikorn; Monica Ek; Ferruccio Doghieri; KTH; []
   Nyckelord :agricultural fibres; biocomposites; renewable polymers; PP; PLA; PHBV; surface modifications; water uptake; microbial growth; biodegradation;

   Sammanfattning : Sustainable polymeric materials put emphasis on mastering the whole life-cycle of polymeric materials. This includes the choice of raw materials, selection of synthesis and processing, environmental impact during long-term use followed by detailed knowledge about recycling and waste management. LÄS MER

3. 22. Superhydrophobic coatings of wax and polymers sprayed from supercritical solutions

   Författare :Louise Ovaskainen; Lars Wågberg; Charlotta Turner; Eric Beckman; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; superhydrophobic coatings; polymer; wax; supercritical carbon dioxde; RESS; Chemical Engineering; Kemiteknik;

   Sammanfattning : The possibility of using supercritical carbon dioxide (scCO2) as the primary solvent in a spray process for producing superhydrophobic surfaces have been examined in this work. Using scCO2 as solvent will have considerably lower environmental impact compared to an organic solvent since scCO2 is considered a green solvent as it is non-toxic, non-flammable and recyclable. LÄS MER

4. 23. Preparation and characterisation of biodegradable microspheres for the delivery of bioactive compounds

   Författare :Cecilia Sturesson; Uppsala universitet; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Pharmacy; FARMACI; PHARMACY; FARMACI; galenisk farmaci; Pharmaceutics;

   Sammanfattning : The incorporation of bioactive compounds into biodegradable polymer microspheres has several advantages. Firstly, the drug substance is protected from physiological degradation. Secondly, using microspheres from polymers with different degradation mechanisms, it is possible to design different release profiles with desired release rates. LÄS MER

5. 24. Chemical and morphological characterisation of long-term properties of environmentally degradable polymers

   Författare :Carina Eldsäter; KTH; []
   Nyckelord :;

   Sammanfattning : The environmental degradation of an aliphatic polyester,poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) and a polyesteramide,poly(butylene adipate-co-amino caproate) (PEA) was studied to answer questionsregarding their life-time in natural environments,e.g.municipal solid waste compost. LÄS MER

7. 25. A supercritical fluids extraction process for the production of drug loaded biodegradable microparticles

   Författare :Raouf Ghaderi; Uppsala universitet; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Pharmacy; FARMACI; PHARMACY; FARMACI; farmaceutisk farmakologi; Pharmaceutical Pharmacology;

   Sammanfattning : The purpose of this thesis was to develop methods suitable for the incorporation of drug substancessuch as proteins into microparticles intended for controlled release. In particular a novel techniquefor the preparation of microparticles using supercritical fluids was investigated. LÄS MER