Biodegradable Surfactants
Mostrando 1-12 de 16 artigos, teses e dissertações.
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1. Novos surfactantes alquil poliglicosídicos à base de amilose extraída da batata inglesa (Solanum tuberosum L.)
Alkyl polyglycosides (APGs) are new biodegradable surfactants, non-toxic, synthesized from abundant renewable sources, potentially more appropriate than anionic surfactants. A range of glycosides denoted APG-Cy was synthesized by the Köenig-Knorr reaction using C10, C16 and C18 alcohols and derived from the degradation of amylose from English potato. The mo
Quím. Nova. Publicado em: 2017-04
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2. Effect of the addition of soy lecithin and Yucca schidigera extract on the properties of gelatin and glycerol based biodegradable films
Gelatin-based films containing soy lecithin or Yucca schidigera extract and glycerol as plasticizer were produced by casting and characterized for their mechanical properties, water vapor permeability (WVP), water solubility, opacity and morphology. The addition of glycerol reduced the tensile strength, with a difference of ~ 68% between the values for the m
Polímeros. Publicado em: 11/06/2013
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3. Biodegradable surfactant evaluation in emulsion polymerization : architectural paint performance / Avaliação de surfactante biodegradavel para polimerização em emulsão : aplicação e desempenho em tintas
O objetivo deste trabalho foi o de avaliar o comportamento de um novo surfactante biodegradável do tipo sulfosuccinato, especificamente desenvolvido para substituir os do tipo alquil fenol etoxilado sulfatado na polimerização em emulsão. Estes últimos apresentam em sua estrutura grupos fenol que os define como não biodegradáveis. Neste trabalho a apli
Publicado em: 2010
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4. CEFALOSPORINAS E SURFACTANTE NÃO-IÔNICO EM EFLUENTE HOSPITALAR: DETERMINAÇÃO, DEGRADAÇÃO POR MEIO DE FOTÓLISE E ELETROCOAGULAÇÃO E IDENTIFICAÇÃO DE SUBPRODUTOS E METABÓLITOS / CEFALOSPORINS AND NON IONIC SURFACTANTS IN HOSPITAL WASTEWATER: DETERMINATION, DEGRADATION BY MEANS OF PHOTOLYSIS AND ELECTROCOAGULATION AND IDENTIFICATION OF BYPRODUCTS AND METABOLITES
The currently incorrect and excessive consumption of pharmaceuticals and surfactants, mainly domestic usage, has become a concern to the scientific community around the world, due to the environmental consequences with regard to the bacterial resistance (characteristic of antibiotics), and alteration of hormonal systems (provoked by the degradation products
Publicado em: 2009
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5. Estudos da atividade antiespumante de ésteres etílicos derivados de óleos vegetais / Estudo da atividade antiespumante de ésteres etílicos derivados de óleos vegetais
Gas-liquid foams are colloidal systems formed by air bubbles separated by a liquid thin film stabilized by surfactants, which are often found in many industrial processes. It becomes often necessary the use of antifoams to avoid loses of material or loses in the processs efficiency caused by a large foam production. The foaming mixtures utilized in this work
Publicado em: 2008
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6. SÃntese e caracterizaÃÃo de surfactantes glicosÃdicos a partir da amilose e alquil fenÃis extraÃdos do LCC. / Synthesis and characterization of glycosidic surfactantes from amylose and alkyl extracted phenols of the LCC.
Nonionic surfactants are synthesised from renewable raw materials such as fat acids and sugars. They are dermatological safe, biodegradable and provide excellent surface active properties, such as good wettability, good foaming production and good cleaning ability. The present work deals with the synthesis and characterization of alkyl polyglycosides where t
Publicado em: 2007
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7. Síntese de Surfactantes Derivados da D-ribonolactona
Surfactants are amphiphilic compounds widely used in cosmetics, food and paint industries. The need for products obtained from natural raw materials instead of petroleum derivatives has led searchers, to the development “natural surfactants” derivated from carbohydrates, biodegradable and atoxic. In this work, we describe the preparation of amphi
Publicado em: 2007
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8. Utilização de resíduos industriais como substratos de baixo custo para a produção de biossurfactante por Candida sphaerica
Surfactants are amphipathic agents with application in different industries, such as the petroleum, food and pharmaceutic. Many kinds of chemical surfactants are being used nowadays, although the development of alternative products, with biodegradable nature and lower toxicity, as the so called biosurfactants, metabolites from microorganisms, is a sound stra
Publicado em: 2007
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9. SÍNTESE DE COMPOSTOS ANFIFÍLICOS DERIVADOS DE δ-D-GLICONOLACTONA, POTENCIAIS AGENTES SURFACTANTES
Surfactants are amphiphilic molecules widely used in many industries. A constant need for products obtained from natural raw materials instead of petroleum derivatives has led to a lot of studies on developing natural surfactants derivative from carbohydrates. These compounds are versatile, biodegradable and introduce a wide range of applications, awake the
Publicado em: 2006
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10. Sintese de surfatantes altamente biodegradaveis pela transesterificação de esteres de acidos graxos com sacarose / Synthesis of highly biodegradable surfactantcs through the transesterification of fatty acid esters with sucrose
Foram testadas várias condições de síntese de ésteres graxos de sacarose de baixa substituição: surfatantes altamente biodegradáveis. Como reagentes, os ésteres metílicos de ácidos graxos foram obtidos por transesterificação de óleo de soja com metanol na presença de bases ou via catálise ácida a partir de ácidos graxos puros, como o palmí
Publicado em: 2005
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11. SULFOCHLORINATION WITH SULFURYL CHLORIDE : AN ALTERNATIVE PROCESS FOR THE MANUFACTURE OF SECONDARY ALKANESULFONATES / SULFOCHLORATION PAR LE CHLORURE DE SULFURYLE : UN PROCEDE ALTERNATIF POUR LA FABRICATION D ALCANESULFONATES SECONDAIRES.
Secondary alkanesulfonates (SAS) are biodegradable surfactants largely used as active matter in detergent formulations and as emulsifying agents. SAS are manufactured by photosulfoxidation or photosulfochlorination of linear paraffin cuts. The photosulfochlorination process usually involves the reaction of a gas mixture (SO 2 + Cl 2) on alkanes, but recent w
Publicado em: 2004
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12. Seleção de linhagem de levedura produtora de biosurfactante e estudo fermentativo para sua produção
Recents Advances in Biotechnology in the last decade have lead to a significant growth of attention to developments n biological sciences for production of a certain compounds on an industrial scale. Research on biosurfactants produced by microorganisms has increased greatly in recent years, since such biosurfactants have many applications in several industr
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 18/02/1997