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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.

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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.
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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.
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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.
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Characterization of Pakistani purified bentonite suitable for possible pharmaceutical application

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.
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Hybrid Polyester Composites Reinforced with Curauá Fibres and Nanoclays

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%).