Results 31 to 40 of about 2,252 (202)

Avaliação da estabilidade térmica de sais quaternários de amônio para uso em argilas organofílicas nacionais: Parte I Evaluation of thermal stability of quaternary ammonium salts for use in national organoclays: Part I

Cerâmica, 2010
A grande propagação da nanotecnologia nos tempos atuais requer estudos cada vez mais específicos para entender a evolução desses materiais. A obtenção de boas propriedades em nanocompósitos polímero/argila faz com que estudos mais aprofundados sejam ...
R. Barbosa, D. D. Souza, E. M. Araújo, T. J. A. Mélo   +3 more
doaj   +1 more source

Remediation of hexavalent chromium through adsorption by bentonite based Arquad® 2HT-75 organoclays [PDF]

, 2010
Unlike hydrophobic organic pollutants, the potential of organoclays to adsorb inorganic ionic contaminants is relatively underexplored. The present study attempts to characterise bentonite (QB) based organoclays synthesised from a commercially available,
Krishnamurti, GSR, Sarkar, B., Rajarathnam, D, Ravi Naidu, Naidu, R, Xi, Yunfei, Xi, YF, Megharaj, M, Naidu, R., Megharaj, Mallavarapu, Mallavarapu Megharaj, Gummuluru S.R. Krishnamurti, Dharmarajan Rajarathnam, Yunfei Xi, Mallavarapu, M., Rajarathnam, Dharmarajan, Naidu, Ravi, Sarkar, B, Xi, Y., Krishnamurti, Gummuluru, Binoy, Sarkar, Rajarathnam, D., Binoy Sarkar, Krishnamutri, G.S.R.   +23 more
core   +1 more source

The Effects of Acid Activation on the Thermal Properties of Polyvinylpyrrolidone and Organoclay Composites

Journal of Chemistry, 2015
The thermal stabilities of polyvinylpyrrolidone-organoclays or organo-acid-activated clay composites prepared by chemical exchange reactions were assessed.
F. Kooli
doaj   +1 more source

Nanocompósitos de Poli(Cloreto de Vinila) (PVC)/argilas organofílicas Poly(Vinyl Chloride) (PVC)/organoclay nanocomposites

Polímeros, 2006
O interesse pelo desenvolvimento de nanocompósitos com matrizes poliméricas aumentou significativamente nos últimos anos, levando a uma grande quantidade de trabalhos publicados e de grupos de pesquisa e desenvolvimento interessados e trabalhando nesta ...
Michelle A. Souza, Luiz A. Pessan, Antonio Rodolfo Jr.   +2 more
doaj   +1 more source

Brazilian organoclays as nanostructured sorbents of petroleum-derived hydrocarbons

Materials Research, 2005
Organophilic clays were prepared using a bentonite from the town of Boa Vista, state of Paraíba, Brazil, and a quaternary ammonium salt (Genamin CTAC-50). The materials obtained were characterized by X-ray diffraction and infrared spectroscopy.
Kleberson Ricardo de Oliveira Pereira, Rosângela Abdala Hanna, Marilda Mendonça Guazzelli Ramos Vianna, Carolina Afonso Pinto, Meiry Gláucia Freire Rodrigues, Francisco Rolando Valenzuela-Diaz   +5 more
doaj   +1 more source

Organoclay-polymer nanocomposites [PDF]

Zastita Materijala, 2014
The properties of polymer nanocomposites exceed the properties of common composite materials due to the nanoscale size and morphology of the fillers used. Particulate fillersare commonly used in polymers forimproved mechanical and thermal properties, as well as modified electrical properties and cost reduction.
Chad Smithson, Marina Stamenović, Maja Nujkić, Slaviša Putić   +3 more
openaire   +2 more sources

Aflatoxin Toxicity Reduction in Feed by Enhanced Binding to Surface-Modified Clay Additives

Toxins, 2011
Animal feeding studies have demonstrated that clay additives, such as bentonites, can bind aflatoxins in ingested feed and reduce or eliminate the toxicity.
Richard E. Zartman, William F. Jaynes
doaj   +1 more source

Zn/Al‐NO3 Layered Double Hydroxide as Alternative Activator for Nitrile Rubber Vulcanization: Effect of the Accelerator‐to‐Sulfur Ratio on Curing Kinetics and Network Properties

Journal of Applied Polymer Science, EarlyView.
Zn/Al‐NO3 layered double hydroxide offers a low‐zinc alternative for sulfur vulcanization of nitrile rubber, reducing nominal zinc loading by an estimated 71%. Its potential as a vulcanization activator depends on the curing system: conventional curing preserves tensile strength despite slower kinetics, whereas efficient curing maintains comparable ...
Lucas Castro Roza de Faria, Marcus Vinícius Alves Sampaio de Souza, Antonio Renato Bigansolli, Paulo Jansen de Oliveira, Fernanda Cristina Fernandes Braga, Marcelo Ferreira Leão de Oliveira, Carolina Guedes Fioravante Rezende, Marcia Gomes de Oliveira, Danieli Martins do Carmo   +8 more
wiley   +1 more source

Comparison of the physical properties of different polyimide nanocomposite films containing organoclays varying in alkyl chain lengths

Reviews on Advanced Materials Science, 2023
Poly(amic acid) (PAA), a precursor of polyimide (PI), is synthesized by reacting dianhydride 4-(2,5-dioxotetrahydrofuran-3-yl)-1,2,3,4-tetrahydronaphthalene-1,2-dicarboxylic anhydride with diamine 3,3′-dihydroxybenzidine in N,N′-dimethylacetamide ...
Lee Seon Ju, Choi Moon Young, Kwac Lee Ku, Kim Hong Gun, Chang Jin-Hae   +4 more
doaj   +1 more source

Recent Advances in Conductive Rubber Composites: Progress, Challenges, and Emerging Opportunities

Macromolecular Rapid Communications, EarlyView.
This study reviews the recent advances in conductive rubber composites, focusing on key aspects such as material selection, conductive mechanisms, interfacial engineering, processing methods, vulcanization strategies, and practical applications. It also discusses current challenges and highlights emerging directions that are shaping the development of ...
Lu Yin, Ali Vahidifar, Steven Yu, Boxin Zhao   +3 more
wiley   +1 more source