Sökning: "Rapeseed canola straw"

Hittade 2 avhandlingar innehållade orden Rapeseed canola straw.

1. 1. Biopolymers and materials from rapeseed straw biorefining

   Författare :Antonia Svärd; Ulrica Edlund; Elisabet Brännvall; Stefan Willför; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Rapeseed canola straw; biorefinery; hemicelluloses; lignin; cellulose; cellulose nanoparticles; films; grafting; thermoplastic; biocomposites; rapshalm; bioraffinaderi; hemicellulosa; lignin; cellulosa; cellulosa nano partiklar; hemicellulosafilm; ympning; termoplastisk; biokompositer; Fiber- och polymervetenskap; Fibre and Polymer Science;

   Sammanfattning : Rapeseed straw was fractionated through a hydrothermal process into its hemicellulose, lignin and cellulose components. In the first step, hemicellulose-rich fractions were extracted. Xylan-rich fractions with high molecular weight, 30,000 – 50,000 g/mol, were obtained at 110 °C and 1.5 M NaOH. LÄS MER

3. 2. Extraction of polymeric rapeseed straw hemicelluloses for renewable films

   Författare :Antonia Svärd; Ulrica Edlund; Elisabet Sjöholm; Emma Strömberg; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; rapeseed straw canola straw; hemicellulose; xylan; mannan; extraction; characterization; severity factor; hemicellulose film; Kemi; Chemistry;

   Sammanfattning : Polymeric hemicelluloses with high molecular weight were extracted from rapeseed straw with a straight forward hydrothermal extraction method, evaluated and refined by statistical factorial screening design and ‘severity factor’ analysis. The influence of the extraction conditions, time, temperature and pH of the extraction liquid, on the composition, molecular weight, yield and properties was unveiled. LÄS MER