<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors></contributors><titles><title><style face="normal" font="default" size="100%">Novel sustainable composites prepared from cork residues and biopolymers</style></title><secondary-title><style face="normal" font="default" size="100%">Biomass and Bioenergy</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">Submitted</style></year></dates><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">Novel low-density biocomposites based on cork and two biodegradable matrices, poly(lactic acid) and poly(caprolactone), were prepared by simple melting-mixing. The surface acylation of cork was studied as a strategy to increase the compatibility with the matrices. The obtained composites were characterized in terms of thermal and mechanical properties, morphology, density and water absorption behavior. All composites showed a good dispersion of cork and a strong interfacial adhesion between the cork particles and the polymeric matrices as evidenced by SEM. The Young's modulus values of the composites were little affected for cork loads up to 10%; but for higher loadings, a considerable decrease on this parameter was observed resulting in more flexible materials. These sustainable cork based materials could find applications in several domains such as in flooring and structural applications, depending on the amount of cork and the polymeric matrix used.</style></abstract></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors></contributors><titles><title><style face="normal" font="default" size="100%">Ecopolyol Production from Industrial Cork Powder via Acid Liquefaction Using Polyhydric Alcohols</style></title><secondary-title><style face="normal" font="default" size="100%">ACS SUSTAINABLE CHEMISTRY &amp; ENGINEERING</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2014</style></year></dates><publisher><style face="normal" font="default" size="100%">AMER CHEMICAL SOC</style></publisher><pub-location><style face="normal" font="default" size="100%">1155 16TH ST, NW, WASHINGTON, DC 20036 USA</style></pub-location><volume><style face="normal" font="default" size="100%">2</style></volume><pages><style face="normal" font="default" size="100%">846-854</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">Ecopolyol production from acid liquefaction of cork powder was studied&lt;br/&gt;for the first time using PEG 400 and glycerol as liquefaction solvents&lt;br/&gt;in the presence of sulfuric acid at moderate temperature and atmospheric&lt;br/&gt;pressure. The effect of the temperature, concentration of catalyst, and&lt;br/&gt;time on the liquefaction yield has been investigated using a fixed set&lt;br/&gt;of reaction conditions namely, a liquefaction solvent mixture/cork&lt;br/&gt;powder ratio of 5/1 and a solvent mixture PEG 400/glycerol ratio of&lt;br/&gt;90/10. The full-factorial design of experiments (DOE) 23 was applied to&lt;br/&gt;obtain an optimized set of liquefaction conditions aiming at minimizing&lt;br/&gt;the residue content. The minimum residue contents experimentally&lt;br/&gt;obtained in this study were 29 wt %, related to cork powder, which were&lt;br/&gt;achieved at 150 C, 4 wt % of sulfuric acid, and 60 min. This value&lt;br/&gt;corresponds to 5 wt % of residue per total mass of reaction product.&lt;br/&gt;The polyols obtained under optimal conditions present similar&lt;br/&gt;characteristics (hydroxyl number value 219 mg(KOH)/g(polyol) and&lt;br/&gt;viscosity 2875 cP, at 25 degrees C) to those of petroleum-based polyols&lt;br/&gt;typically used in the polyurethane foam industry.</style></abstract></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Gandini, Alessandro</style></author><author><style face="normal" font="default" size="100%">Pascoal Neto, Carlos</style></author><author><style face="normal" font="default" size="100%">Silvestre, Armando J. D.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Suberin: A promising renewable resource for novel macromolecular materials</style></title><secondary-title><style face="normal" font="default" size="100%">Progress in Polymer Science</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">Cork</style></keyword><keyword><style  face="normal" font="default" size="100%">dicarboxylic acids</style></keyword><keyword><style  face="normal" font="default" size="100%">hydroxyacids</style></keyword><keyword><style  face="normal" font="default" size="100%">long-chain aliphatic compounds</style></keyword><keyword><style  face="normal" font="default" size="100%">polyurethanes</style></keyword><keyword><style  face="normal" font="default" size="100%">suberin</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2006</style></year><pub-dates><date><style  face="normal" font="default" size="100%">2006///</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">http://linkinghub.elsevier.com/retrieve/pii/S0079670006000682</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">31</style></volume><pages><style face="normal" font="default" size="100%">878 - 892</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">Suberin, an aliphatic-aromatic cross-linked natural polymer present in the outer tissues of numerous vegetable species, is discussed in terms of (i) its occurrence, particularly where it dominates the bark composition of some trees, (ii) its macromolecular structure and positioning within the cell wall, (iii) its controlled chemical splicing (depolymerization through ester cleavage), (iv) the qualitative and quantitative composition of the ensuing monomeric fragments, and (v) the exploitation of this mixture of monomers in macromolecular science, both as a possible functional additive and as a source of novel materials. The presence of terminal carboxylic and hydroxy groups and of side hydroxy and epoxy moieties on the long chains of suberin ‘‘monomers’’ makes them particularly suited as building blocks for polymers with original architectures and interesting properties</style></abstract><issue><style face="normal" font="default" size="100%">10</style></issue></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors></contributors><titles><title><style face="normal" font="default" size="100%">Suberin: A promising renewable resource for novel macromolecular materials</style></title><secondary-title><style face="normal" font="default" size="100%">Progress in Polymer Science</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2006</style></year></dates><volume><style face="normal" font="default" size="100%">31</style></volume><pages><style face="normal" font="default" size="100%">878-892</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">Suberin, an aliphatic-aromatic cross-linked natural polymer present in the outer tissues of numerous vegetable species, is discussed in terms of (i) its occurrence, particularly where it dominates the bark composition of some trees, (ii) its macromolecular structure and positioning within the cell wall, (iii) its controlled chemical splicing (depolymerization through ester cleavage), (iv) the qualitative and quantitative composition of the ensuing monomeric fragments, and (v) the exploitation of this mixture of monomers in macromolecular science, both as a possible functional additive and as a source of novel materials. The presence of terminal carboxylic and hydroxy groups and of side hydroxy and epoxy moieties on the long chains of suberin ‘‘monomers’’ makes them particularly suited as building blocks for polymers with original architectures and interesting properties</style></abstract></record></records></xml>