Zobrazeno 1 - 10
of 143
pro vyhledávání: '"Fernando Villafañe"'
Publikováno v:
Nanomaterials, Vol 12, Iss 14, p 2409 (2022)
A family of transparent polyisocyanurate-polyurethane (PUR-PIR) aerogels with an interesting combination of physical properties were synthesized. First, their textural properties were analyzed aiming to study catalyst influence on the final porous st
Externí odkaz:
https://doaj.org/article/462955156ce14638a54e1035c0a86aad
Autor:
Beatriz Merillas, Alyne Lamy-Mendes, Fernando Villafañe, Luisa Durães, Miguel Ángel Rodríguez-Pérez
Publikováno v:
Gels, Vol 8, Iss 7, p 392 (2022)
In this work, silica aerogel composites reinforced with reticulated polyurethane (PU) foams have been manufactured having densities in the range from 117 to 266 kg/m3 and porosities between 85.7 and 92.3%. Two different drying processes were employed
Externí odkaz:
https://doaj.org/article/b787448642c4409cb16b0f5f22e0fa6a
Publikováno v:
Nanomaterials, Vol 12, Iss 13, p 2232 (2022)
A novel synthesis of polyurethane foam/polyurethane aerogel (PUF–PUA) composites is presented. Three different polyurethane reticulated foams which present the same density but different pore sizes (named S for small, M for medium, and L for large)
Externí odkaz:
https://doaj.org/article/7b0328c483df40ed9e015953edc92e21
Publikováno v:
Nanomaterials, Vol 12, Iss 9, p 1522 (2022)
Highly transparent polyisocyanurate–polyurethane (PUR–PIR) aerogels were synthesized, and their optical properties were studied in detail. After determining the density and structural parameters of the manufactured materials, we analyzed their op
Externí odkaz:
https://doaj.org/article/ceeb9cd158384883b7cd96fac8ffc1ab
Publikováno v:
Current Topics and Emerging Issues in Materials Sciences Vol. 1 ISBN: 9788119217342
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::edb66ea6ba67232346bf182a254a4396
https://doi.org/10.9734/bpi/cteims/v1/5666e
https://doi.org/10.9734/bpi/cteims/v1/5666e
Autor:
Paulo Fernando Villafañe Garcia, Antonio Claudio Soares, Josenilda do Nascimento Lonardelli, F. H. Ferreira, D. F. Rossi
Publikováno v:
The Leading Edge. 40:931-935
The time of flight of a plane wavefront generated from an acoustic pulse is expected to decrease when the medium length between the wave emitter and receiver is shortened. This simple idea is extrapolated to the case of reservoir compaction in order
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4d3d37d6b934321bedeff33280ccb9d0
https://doi.org/10.1190/tle40120931.1
https://doi.org/10.1190/tle40120931.1
Autor:
Paulo Fernando Villafañe Garcia, Priscila Duarte Almeida, Gabriela Ribeiro Pereira, Guilherme Fernandes. Vasquez
Publikováno v:
Proceedings of the Rio Oil and Gas.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::dfcc036639f12097322f94292391d53c
https://doi.org/10.48072/2525-7579.rog.2022.483
https://doi.org/10.48072/2525-7579.rog.2022.483
Publikováno v:
Nanomaterials; Volume 12; Issue 14; Pages: 2409
A family of transparent polyisocyanurate-polyurethane (PUR-PIR) aerogels with an interesting combination of physical properties were synthesized. First, their textural properties were analyzed aiming to study catalyst influence on the final porous st
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9d78f0e1cbfc6f1f7f61ee0f0cf7207a
Autor:
Fernando Villafañe, Beatriz Merillas Valero, MIGUEL ANGEL RODRIGUEZ PEREZ, Judith Martín-de León
Publikováno v:
Nanomaterials; Volume 12; Issue 9; Pages: 1522
Highly transparent polyisocyanurate–polyurethane (PUR–PIR) aerogels were synthesized, and their optical properties were studied in detail. After determining the density and structural parameters of the manufactured materials, we analyzed their op
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6e92e78c9cc04b7482e5a2822d97d0c5
Publikováno v:
Polymers; Volume 14; Issue 9; Pages: 1807
Polyurethane foams with a hybrid structure between closed cell and open cell were fabricated and fully characterized. Sound absorption measurements were carried out in order to assess their acoustic performance at different frequency ranges. The cell
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::611efcc75246e439912a4832eccea5f9
https://pubmed.ncbi.nlm.nih.gov/35566975
https://pubmed.ncbi.nlm.nih.gov/35566975