Transfer and Innovation Center

Ourense, Spain

Transfer and Innovation Center

Ourense, Spain

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Gonzalez D.,University of Vigo | Gonzalez D.,Transfer and Innovation Center | Campos A.R.,PIEP Innovation in Polymer Engineering | Cunha A.M.,University of Minho | And 3 more authors.
Collection of Czechoslovak Chemical Communications | Year: 2011

Cellulose fibres were employed as reinforcement agent for biodegradable composites using polylactic acid (PLA) as a polymer matrix. PLA can be obtained from renewable resources, and it is attracting much interest owing to its favourable physico-mechanical properties and biodegradability. Prior to composite compounding, two commercial PLA from different suppliers were characterized for apparent density, flow index, crystallinity, thermal properties, melt flow rheology and intrinsic viscosity for comparison. In experiments performed with an integrated compounding-injection moulding machine (ICIM), the effects of the processing conditions on the mechanical properties of composites (tensile strength, stiffness and strain at break) were analyzed using a Taguchi experimental design. Other properties of the composites, such as surface morphology and fibre length distribution, were also considered. ICIM technology provided composites with better mechanical properties and lower fibre degradation than the conventional sequential extrusion and injection moulding (SEIM) technology. © 2011 Institute of Organic Chemistry and Biochemistry.


Gonzalez D.,University of Vigo | Gonzalez D.,Transfer and Innovation Center | Campos A.R.,PIEP Innovation in Polymer Engineering | Cunha A.M.,University of Minho | And 4 more authors.
BioResources | Year: 2010

Broom (Cytisus scoparius) samples were processed in media containing formic acid and hydrogen peroxide (MILOX process) to obtain celluloseenriched solids. The chemical processing of broom samples was assessed by means of a centered, second order factorial design of experiments. Empirical models derived from the experimental data gave a close interpretation of the experimental patterns, and enabled the selection of operational conditions for achieving extensive delignification and hemicellulose removal, while minimizing the dissolution of cellulose. Broom samples processed under the selected conditions were employed to reinforce PLA composites, which were characterized mechanically and by DSC, SEM, and water absorption experiments.

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