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Novel Biopolymer Reinforced Composites
KTH, School of Chemical Science and Engineering (CHE).
2012 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

PLA is not a widely used polymer due to the low performance at high temperature and its high cost. Focusing on improvement of PLA properties as well as reducing cost, a PLA- based composite with cellulose has been studied in this work. To blend PLA and cellulose in a nano/micro scale, dissolution process in LiCl/DMac solvent has been used. The prepared composites have been characterized by thermal analysis (DSC and TGA) to investigate the effect of cellulose on the thermal stability of PLA and further characterizations (by FTIR and NMR) to investigate structural and chemical characterization of the composites.For preparing the composite of PLA/Cellulose, a homogenous dispersion of semi-crystalline PLA in LiCl/DMAc was mixed with the cellulose solution in the same solvent and then the mixture was regenerated in a water coagulation bath. A variety of methods such as Thermal gravimetric analysis (TGA), Differential scanning calorimetry (DSC), Solid state ¹³C NMR and FTIR Spectroscopy were used to find more about the composites.

Place, publisher, year, edition, pages
Keyword [en]
Cellulose, Polylactic Acid, Composite, Dissolution, LiCl/DMAc
National Category
Engineering and Technology
URN: urn:nbn:se:kth:diva-157163OAI: diva2:769474
Available from: 2014-12-08 Created: 2014-12-08 Last updated: 2014-12-08Bibliographically approved

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