Zobrazeno 1 - 10
of 172
pro vyhledávání: '"Francisco Rolando Valenzuela Díaz"'
Autor:
Ana Carolina Vale Campos Lisboa, Maria das Graças da Silva Valenzuela, Gisella Grazioli, Francisco Rolando Valenzuela Díaz, Mari Cleide Sogayar
Publikováno v:
Materials Research, Vol 10, Iss 4, Pp 353-358 (2007)
Development of polymeric materials has been increasingly emphasized in Biomedicine. Here, we evaluate the use of microcapsules made of Biodritin®, a biocompatible polymer compound which contains sodium alginic acid, a natural polymer extracted from
Externí odkaz:
https://doaj.org/article/2843f403069941c6ad7bd4b189efc1f5
Autor:
Hélio Wiebeck, Francisco Rolando Valenzuela-Díaz, Maria das Graças da Silva-Valenzuela, Shu Wang, Bianca Michel
Publikováno v:
Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual)
Universidade de São Paulo (USP)
instacron:USP
Universidade de São Paulo (USP)
instacron:USP
A nanocomposite system comprised by a biodegradable polymer, poly(butylene succinate-co-lactate) (PBSL), and a Brazilian nanoclay (VMF1) containing montmorillonite (MMT) and kaolinite (K) is used to prepare microcapsules by solvent diffusion method.
Autor:
Danilo Silva Ferreira, Meiry Gláucia Freire Rodrigues, Francisco Rolando Valenzuela-Díaz, Luiz Carlos Lobato Dos Santos, Kleberson Ricardo De Oliveira Pereira
Publikováno v:
Anais do 11º Congresso Brasileiro de Petróleo e Gás.
Autor:
Antonio Claudio Kieling, Abderrezak Bezazi, Jamile Dehaini, Gilberto Garcia del Pino, Maria das Graças da Silva Valenzuela, Jose Luis Valin Rivera, Cláudia Cândida Silva, Haithem Boumediri, Túlio Hallak Panzera, Francisco Rolando Valenzuela Díaz
Publikováno v:
Journal of Composite Materials. 55:57-69
This work evaluates an epoxy composite reinforced with curauá fibres and/or organophilic clay. Epoxy polymers reinforced with nano-clays are also assessed. Composites are manufactured by cold pressing using fibres in pristine and treated conditions.
Autor:
Jose Luis Valin Rivera, Haithem Boumediri, Abderrezak Bezazi, Jamile Dehaini, Juliana Fontolan Rolim de Souza, Antonio Claudio Kieling, Túlio Hallak Panzera, Gilberto Garcia del Pino, Francisco Rolando Valenzuela Díaz
Publikováno v:
Fibers and Polymers. 21:399-406
This work investigates a hybrid polyester composite consisted of Curaua natural fibres and organophilic clay nanoparticles. A Taguchi method is used to identify the effects of fibre fraction (10, 20 and 30 wt%), alkaline treatment concentration (NaOH
Autor:
Francisco Rolando Valenzuela-Díaz, Jessica de Carvalho Arjona, Maria das Graças da Silva-Valenzuela, Shu-Hui Wang
Publikováno v:
Polymers
Volume 13
Issue 5
Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual)
Universidade de São Paulo (USP)
instacron:USP
Polymers, Vol 13, Iss 722, p 722 (2021)
Volume 13
Issue 5
Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual)
Universidade de São Paulo (USP)
instacron:USP
Polymers, Vol 13, Iss 722, p 722 (2021)
Urea is the most used fertilizer around the world as the main source of nitrogen to soil and plants. However, the administration of nitrogen dosage is critical, as its excess can be harmful to the environment. Therefore, the encapsulation of urea to
Publikováno v:
Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual)
Universidade de São Paulo (USP)
instacron:USP
Universidade de São Paulo (USP)
instacron:USP
Bentonite collected from Nowshera (Pakistan) was treated with NaCl, and the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ae1788e496fe7b38c5b2f50421bdc47c
Autor:
Abderrezak Bezazi, Antonio Claudio Kieling, Jamile Dehaini, Francisco Rolando Valenzuela Díaz, Gilberto Garcia del Pino, Jose Luis Valin Rivera, Haithem Boumediri
Publikováno v:
Lecture Notes in Mechanical Engineering ISBN: 9783030520700
Vegetable fibers have good mechanical properties, low density, no toxicity, are renewable and have low cost among other properties. The use of lignocellulosic fibers as reinforcement in polymeric composite materials in substitution of synthetic fiber
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7d7c92ea7cb2053290085b5295884144
https://doi.org/10.1007/978-3-030-52071-7_46
https://doi.org/10.1007/978-3-030-52071-7_46
Autor:
Antônio Hortencio Munhoz Junior, R. F. Neves, Francisco Rolando Valenzuela Díaz, Raphael Cons Andrades
Publikováno v:
Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual)
Universidade de São Paulo (USP)
instacron:USP
Universidade de São Paulo (USP)
instacron:USP
Kaolin is a cheap and abundant source of silica and alumina, which may be used as precursors for the production of zeolites, molecular sieves with pores in the nanometer scale. Brazil, one the largest producers of kaolin, generates tons of kaolin was
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b5dc48c63d996725469974eb1a3332ff
Autor:
Gilmar Pinheiro, Bianca Michel, Thamires Carvalho, Margarita Bobadilha, Maria das Graças da Silva-Valenzuela, Jessica de Carvalho Arjona, Francisco Rolando Valenzuela-Díaz, Tatiana Costa
Publikováno v:
The Minerals, Metals & Materials Series ISBN: 9783030366278
Kaolins are clays with a wide range of uses, being one of them as a component in several types of cosmetics and pharmaceuticals products as excipient agents for chemical actives, considering its potential to meet international requirements described
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::28b21eb095e47f77729e4822ab313ea1
https://doi.org/10.1007/978-3-030-36628-5_34
https://doi.org/10.1007/978-3-030-36628-5_34