Sökning: "Precursor Fibers"
Hittade 4 uppsatser innehållade orden Precursor Fibers.
1. Wet Spinning of Cellulose-Lignin Precursor for Carbon Fibers : Effect of Coagulation Bath Composition & Spin Finish
Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Tillämpad mekanikSammanfattning : Carbon fibers (CF) are a material with a composition of over 90% carbon, which has high mechanical properties and low density. This unique combination of properties makes it requirable in applications such as vehicles, aerospace, wind power, and space industries. Commercially made CF are made using the fossil raw material polyacrylonitrile (PAN). LÄS MER
2. Wet spinning of carbon fiber precursors from cellulose-lignin blends in a cold NaOH(aq) solvent system
Master-uppsats, Linnéuniversitetet/Institutionen för byggd miljö och energiteknik (BET)Sammanfattning : Carbon fiber (CF) is predominantly produced from fossil-based sources and is therefore an area of interest for further development towards a more sustainable society. The purpose of this thesis work was to investigate the possibility of producing precursor fibers (PFs) for CF production from a blend of renewable cellulose andlignin. LÄS MER
3. Wet Spinning of Lignin and Cellulose Precursor Fibers Using Cold Sodium Hydroxide Dissolution
Master-uppsats, KTH/Fiber- och polymerteknologiSammanfattning : Användningen av cellulosa och lignin för prekursorfibrer (PF) för kolfibrer (CF) är ett mycket intressant forskningsområde på grund av den stora miljöpåverkan som dagens PF-fossilbaserade råvara PAN har. Denna avhandling fokuserar på att utveckla PF med ett kallt NaOH-upplösningssystem med cellulosakoncentrationer från 4,5 till 5,5 viktprocent med varierande massaviskositet och tillsats av lignin från 0-40 viktprocent jämfört med cellulosa. LÄS MER
4. Surface Treatment of Softwood Lignin Based Carbon Fibers for Enhanced Interfacial Adhesion : Effects of Plasma Treatment Parameters on the Creation of Surface Groups
Master-uppsats, Luleå tekniska universitet/MaterialvetenskapSammanfattning : Lightweight design is an essential part of lowering CO2 emission, which is one of the mostimportant challenges that the automotive industry is facing today. Carbon fiber reinforcedplastics offer an enormous potential for replacing heavier structural materials like steel andaluminum, however due to their high cost and scarcity, carbon fibers are not a very feasibleoption to use in high volume production applications. LÄS MER