Sökning: "lignin reactivity"
Hittade 4 uppsatser innehållade orden lignin reactivity.
1. Lignin modification for higher reactivity towards epoxides
Master-uppsats, KTH/Fiber- och polymerteknologiSammanfattning : Fem metoder har använts för att modifiera barrvedslignin med syftet att öka reaktiviteten av ligninet mot epoxidgrupper. Ligninprover analyserades med NMR och FTIR medan reaktivitet var mätt genom reometri. Metoder som ökade mängden karboxylsyragrupper på ligninet minskade ligninets reaktivitet. LÄS MER
2. Synthesis and Investigation of Nitrile-Containing Polymers Inspired by Lignin
Master-uppsats, Lunds universitet/Centrum för analys och syntesSammanfattning : The lignin-inspired derivatives coniferyl aldehyde and sinapyl aldehyde were used to prepare nitrile-containing methacrylate monomers with the aim to synthesize bio-based polymers exhibiting high glass transition temperatures (Tgs). The aldehydes were initially transformed to the corresponding nitriles and then underwent methacrylation before being polymerised by free-radical polymerisation. LÄS MER
3. Synthetic Functionalization of Colloidal Lignin Particles for Wood Adhesive Applications
Master-uppsats, KTH/Skolan för kemi, bioteknologi och hälsa (CBH)Sammanfattning : Functionalizable spherical colloidal lignin particles (CLPs) represent a valuable asset for the valorization of lignin side-streams from the pulp industry. The spherical structure allows for the circumvention of the heterogeneous and poorly dispersible structure of the biopolymer. LÄS MER
4. Chemical methods to increase the reactivity of lignin : In the context of green chemistry and education for sustainable development
Uppsats för yrkesexamina på avancerad nivå, KTH/Skolan för teknikvetenskaplig kommunikation och lärande (ECE)Sammanfattning : The research concerning lignin in high value applications has increased during the last years due to its renewability and availability in the black liquor from pulp mills. Today the major part of kraft lignin found in the black liquor is used as fuel to gain energy in the recovery boiler. LÄS MER