Sökning: "Polylactic acid PLA"

Visar resultat 21 - 25 av 31 uppsatser innehållade orden Polylactic acid PLA.

1. 21. A comparison between the effects of polylactic acid and polystyrene microplastics on Daphnia magna

   Master-uppsats, Stockholms universitet/Institutionen för miljövetenskap och analytisk kemi

   Författare :Mikaela Puranen Vasilakis; [2017]
   Nyckelord :Microplastics; daphnia magna; bioplastics; feeding rate; reproduction; Mikroplast; daphnia magna; bioplast; födoupptag; reproduktion;

   Sammanfattning : The effects of microplastics on zooplankton are an increasing environmental concern. Both primary microplastics that are produced as constituents of cosmetic products, as well as secondary microplastics that are formed by degradation of larger plastic debris, are ubiquitous in aquatic environments. LÄS MER

3. 22. Impact of biobased packaging materials on quality of fully-baked frozen bread

   Master-uppsats, Lunds universitet/Förpackningslogistik

   Författare :Yoga Putranda; [2017]
   Nyckelord :biobased packaging material; buns; packaging; polyethylene; quality; Technology and Engineering; Agriculture and Food Sciences;

   Sammanfattning : The performance of five commercial available biobased packaging films for fully-baked frozen bread was studied in comparison to polyethylene (PE) film. The main purpose of this study was to understand how biobased packaging materials affect the quality of fully–baked frozen bread. LÄS MER

4. 23. Bestämning av mekaniskaegenskaper för ett bio-kompositmaterial

   M1-uppsats, Linnéuniversitetet/Institutionen för byggteknik (BY)

   Författare :Oscar Gren Bernhäll; Adam Nilsson; [2017]
   Nyckelord :Durapulp; mechanical properties; flexural properties; polylactic acid PLA ; wood-plastic composite WPC ; E-modulus; bending strength.;

   Sammanfattning : The purpose of the work is the determination of flexural properties for thebiocomposite Durapulp. The study includes laborative tests on Durapulp andreference materials, commonly used in the building sector. Stiffness and strength of Durapulp show that it has the potential as a replacement for conventional wood-based materials. . LÄS MER

5. 24. NatureDent brush : Ett examensarbete inom produktutveckling med förnybara material

   Kandidat-uppsats, Högskolan i Halmstad/Akademin för ekonomi, teknik och naturvetenskap

   Författare :Pontus Nord; Andrea Körberg Calmerfalk; [2017]
   Nyckelord :;

   Sammanfattning : Detta examensarbete har utförts på Högskolan i Halmstad. Tillsammans med Swt Development har uppgiften varit att utveckla en prototyp av en tandborste tillverkad i en förnybar biokomposit bestående av polylaktid (PLA) och cellulosafiber. Utgångspunkten var att utveckla en plastprodukt som används inom bland annat vården. LÄS MER

7. 25. Development of Kraft Lignin and Coating Technique to Prepare Coated Urea Fertilisers with Increased Nutrient Use Efficiency

   Master-uppsats, KTH/Skolan för kemivetenskap (CHE)

   Författare :Xueyan Xu; [2017]
   Nyckelord :fertilizer coating; lignin; modified lignin; polylactide; slow release; ytbeläggning för gödningsmedel; lignin; modifierad lignin; polylaktid; kontrollerad frisättning;

   Sammanfattning : Coating urea to prepare controlled release N-fertilizer has been considered as an effective way to increase its nutrient use efficiency, thus reduce its waste and the consequent harmful environmental impacts. Inorganic sulphur and synthetic polymers have been used in the industry as coating materials together with utilization of various types of expensive coating equipment which commonly requires also complicated technical setup and controls. LÄS MER