Development of silica-rich polyols from rice husk biomass

Pinto, João A.; Belgacem, Mohamed Naceur; Rodrigues, Alírio; Barreiro, M.F.

Publication

Development of silica-rich polyols from rice husk biomass

2018Conference object

dc.contributor.author	Pinto, João A.
dc.contributor.author	Belgacem, Mohamed Naceur
dc.contributor.author	Rodrigues, Alírio
dc.contributor.author	Barreiro, M.F.
dc.date.accessioned	2018-10-17T15:55:35Z
dc.date.available	2018-10-17T15:55:35Z
dc.date.issued	2018
dc.description.abstract	Rice (Oryza sativa) is one of the most produced and consumed cereals in the world, being the main food for more than half of the world population. It contains, by weight, about 25% of husk and 10% of bran, which represent a high volume of residues. In fact, every year about 30 million tons of solid residues (husk and pulp) are produced, most of them inadequately disposed. The rice husk ash (RHA) has proved to be an important source material for manufacturing value-added silicon carbide, silicon nitride, silicon tetrachloride, magnesium silicide, pure silicon, zeolites, fillers for rubbers and plastic composites, corrosion resistant cements, adsorbents and support of heterogeneous catalysts. The abundant presence of silica is considered an interesting feature of this lignocellulosic residue, which can be exploited in the production of silica-rich polyols. In this context, the oxypropylation of RH will enable the direct obtainment of polyols enriched with silica, which can find application as raw-materials for the synthesis of polyurethanes and other polymeric materials. The incorporation of silica in polyurethanes leads to an increase of crystallinity and polymer chain orientation. Also, the incorporation of nanofillers like silica can provide materials with higher thermal, mechanical, optical properties, and flame retardancy properties. In fact, silica nanoparticles have received much attention due to their mild synthetic preparative conditions, large surface area, smooth nanoporous surface, high adsorption capacity and large pore volume. In this context, and as a preliminary study to the topic, the oxypropylation process of RH will be presented and discussed.	pt_PT
dc.description.sponsorship	POCI-01-0145-FEDER-006984 (LA LSRE-LCM), funded by FEDER, through POCICOMPETE2020 and FCT; UID/AGR/00690/2013 (CIMO), financed by FEDER, through POCI-COMPETE2020; Project NORTE-01-0145-FEDER-000006, funded by NORTE2020 under PT2020, through ERDF. To the CECILIO Group for the supply of the rice husk.	pt_PT
dc.description.version	info:eu-repo/semantics/publishedVersion	pt_PT
dc.identifier.citation	Pinto, J.A.; Belgacem, M.N.; Rodrigues, A.E.; Barreiro, M.F. (2018). Development of silica-rich polyols from rice husk biomass. In 9th Conference Green Chemistry and Nanotechnologies in Polymeric Materials. Cracow, Polónia	pt_PT
dc.identifier.uri	http://hdl.handle.net/10198/18089
dc.language.iso	eng	pt_PT
dc.peerreviewed	yes	pt_PT
dc.publisher	Cracow University of Technology	pt_PT
dc.rights.uri	http://creativecommons.org/licenses/by/4.0/	pt_PT
dc.title	Development of silica-rich polyols from rice husk biomass	pt_PT
dc.type	conference object
dspace.entity.type	Publication
oaire.awardURI	info:eu-repo/grantAgreement/FCT/5876/UID%2FAGR%2F00690%2F2013/PT
oaire.citation.conferencePlace	Hotel Qubus, Cracow, Poland	pt_PT
oaire.citation.title	9th Conference Green Chemistry and Nanotechnologies in Polymeric Materials	pt_PT
oaire.fundingStream	5876
person.familyName	Pinto
person.familyName	Barreiro
person.givenName	João A.
person.givenName	Filomena
person.identifier.ciencia-id	E518-E967-5179
person.identifier.ciencia-id	3418-47D5-5746
person.identifier.orcid	0000-0002-6853-9921
person.identifier.orcid	0000-0002-6844-333X
person.identifier.rid	L-9802-2014
person.identifier.scopus-author-id	57208035714
person.identifier.scopus-author-id	57188719717
project.funder.identifier	http://doi.org/10.13039/501100001871
project.funder.name	Fundação para a Ciência e a Tecnologia
rcaap.rights	openAccess	pt_PT
rcaap.type	conferenceObject	pt_PT
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