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Polymers 2016, 8(7), 255; doi:10.3390/polym8070255

Microfibrillated Lignocellulose Enables the Suspension-Polymerisation of Unsaturated Polyester Resin for Novel Composite Applications

1
Ministry of Education Key Laboratory of Wooden Material Science and Application, Beijing Key Laboratory of Wood Science and Engineering, MOE Engineering Research Centre of Forestry Biomass Materials and Bioenergy, Beijing Forestry University, Beijing 100083, China
2
Kompetenzzentrum Holz GmbH, Altenbergerstrasse 69, A-4040 Linz, Austria
3
Department of Polymer Technology, University of Leoben, Otto Glöckel Strasse 2, A-8700 Leoben, Austria
4
Zentrum Holzwirtschaft, University of Hamburg, Leuschnerstrasse 91, D-21031 Hamburg-Bergedorf, Germany
5
Department of Materials Science and Process Engineering, BOKU–University of Natural Resources and Life Science Vienna, Konrad Lorenz Strasse 24, A-3430 Tulln, Austria
*
Authors to whom correspondence should be addressed.
Academic Editor: Antonio Pizzi
Received: 18 May 2016 / Revised: 5 July 2016 / Accepted: 6 July 2016 / Published: 11 July 2016
View Full-Text   |   Download PDF [4220 KB, uploaded 11 July 2016]   |  

Abstract

A new route towards embedding fibrillated cellulose in a non-polar thermoset matrix without any use of organic solvent or chemical surface modification is presented. It is shown that microfibrillated lignocellulose made from cellulose with high residual lignin content is capable of stabilising an emulsion of unsaturated polyester resin in water due to its amphiphilic surface-chemical character. Upon polymerisation of the resin, thermoset microspheres embedded in a microfibrillated cellulose network are formed. The porous network structure persists after conventional drying in an oven, yielding a mechanically stable porous material. In an application experiment, the porous material was milled into a fine powder and added to the polyester matrix of a glass fibre-reinforced composite. This resulted in a significant improvement in fracture toughness of the composite, whereas a reduction of bending strength and stiffness was observed in parallel. View Full-Text
Keywords: microfibrillated cellulose; unsaturated polyester resin; suspension polymerization; composite reinforcement microfibrillated cellulose; unsaturated polyester resin; suspension polymerization; composite reinforcement
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Yan, Y.; Herzele, S.; Mahendran, A.R.; Edler, M.; Griesser, T.; Saake, B.; Li, J.; Gindl-Altmutter, W. Microfibrillated Lignocellulose Enables the Suspension-Polymerisation of Unsaturated Polyester Resin for Novel Composite Applications. Polymers 2016, 8, 255.

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