F
Francisco Rolando Valenzuela Díaz
Researcher at University of São Paulo
Publications - 27
Citations - 1291
Francisco Rolando Valenzuela Díaz is an academic researcher from University of São Paulo. The author has contributed to research in topics: Ultimate tensile strength & Composite number. The author has an hindex of 8, co-authored 17 publications receiving 1181 citations.
Papers
More filters
Journal ArticleDOI
Organoclays: Properties, preparation and applications
TL;DR: In this article, the authors give an overview of properties, synthesis and applications of bentonite and polymer nanocomposites and describe the research performed until the present moment, including different synthesis techniques, modifications with several chemical compounds as quaternary alkylammonium salts and also biomolecules as enzymes that provide applicability in a variety of fields.
Journal ArticleDOI
Studies on the acid activation of Brazilian smectitic clays
TL;DR: The paper presents a review of the acid activation of bentonites from 20 deposits from several regions of Brazil and shows good decolorizing power for soybean, castor, cottonseed, corn and sunflower oils.
Journal ArticleDOI
Argilas organofílicas: características, metodologias de preparação, compostos de intercalação e técnicas de caracterização
TL;DR: This paper present a revisao bibliografica sobre argilas organofilicas, especialmente as obtidas a partir de bentonitas e de sais quaternarios de amonio.
Journal ArticleDOI
Characterization of Pakistani purified bentonite suitable for possible pharmaceutical application
Liaqat Ali Shah,Maria das Graças da Silva Valenzuela,Maria das Graças da Silva Valenzuela,Abdul Mannan Ehsan,Francisco Rolando Valenzuela Díaz,Nazir Shah Khattak +5 more
TL;DR: In this article, the suitability of Pakistani bentonite for its possible pharmaceutical use in raw and purified forms was assessed by two different methods i.e. simple sedimentation and classical NaCl treatment.
Journal ArticleDOI
Hybrid Polyester Composites Reinforced with Curauá Fibres and Nanoclays
Gilberto Garcia del Pino,Antonio Claudio Kieling,Abderrezak Bezazi,Haithem Boumediri,Juliana Fontolan Rolim de Souza,Francisco Rolando Valenzuela Díaz,Jose Luis Valin Rivera,Jamile Dehaini,Túlio Hallak Panzera +8 more
TL;DR: In this paper, a hybrid polyester composite consisting of Curaua natural fibres and organophilic clay nanoparticles was used to identify the effects of fibre fraction (10, 20 and 30 wt), alkaline treatment concentration (NaOH, 2.5, 5, 5 and 10 wt%), treatment time (2, 4 and 8 h) and nanoparticle content (2.5 and 2.10 wt%).