Rheological Measurements and Thermal Characterization of Lamellar Gel Phase Emulsions Developed with Cetearyl Alcohol/Nonionic Ethoxylated Surfactants

Prestes, Paula Souza; Soares, Fabiana Andréia Schäfer De Martini; Oliveira, Alexandra Martini de; Gioielli, Luíz Antônio; Kaneko, Telma Mary; Zanin, M.; Velasco, Reinaldo

doi:10.1080/01932691.2011.620893

Cited by 4 publications

(3 citation statements)

References 23 publications

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“…Several examples in the literature evoke thermogravimetric technique as a good methodology to describe the types of water present in emulsified systems , all being based on the work by Junginger et al . .…”

Section: Resultsmentioning

confidence: 99%

Influence of the emollient on emulsions containing lamellar liquid crystals: from molecular organization towards applicative properties

Terescenco

Savary

Picard

et al. 2018

Intern J of Cosmetic Sci

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OBJECTIVE: The sensory perception of cosmetic emulsions is complex as it is governed by an important number of parameters like the choice of raw materials, their interactions, the structural organisation of the system, etc. The aim of the present work was to go further in the interpretation of the emollient-surfactant interactions, towards the emulsions applicative properties. For this purpose, two systems containing liquid crystals of the lamellar type were formulated, differing only in the selected emollient. METHODS: First, the liquid crystals types were checked using different tools like the optical microscopy under the bright and polarized light, the wide-angle X rays diffraction and, finally, thermogravimetric analysis. Next, two sensory attributes, namely compression force and difficulty of spreading, were evaluated by a sensory panel. In addition to that, complementary instrumental characterizations (flow tests, textural analysis and contact angle measurements) were performed in order to understand how the panel could discriminate the products. RESULTS: The results showed that isohexadecane emollient induces the a-gel structures, while caprylic capric triglycerides favour the formation of the lamellar liquid crystals near to a-gel. For the compression force, the results point out that there is no direct interaction between the oil phase and the skin. For this attribute, depending on its chemical structure, emollient impacts the human perception only by changing the lamellar phase type. Concerning the difficulty of spreading, both the emulsion structure and the emollient properties should be considered. Immediate perception is impacted by the emulsions destruction, making the droplet roll one on each other. Then, once the droplets monolayer is disrupted, the emollient comes into direct contact with the skin. In this case, the perception is governed by the direct affinity of the emollient with the skin, nonpolar emollients being easier to spread if compared to polar ones. CONCLUSION: The sensory perception is guided not only by the choice of the raw materials but also by their interactions. It was shown that the chemical structure of the emollients affected the molecular organization of liquid crystals present in the emulsion and, consequently, directly or indirectly its sensory perception.

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Section: Resultsmentioning

confidence: 99%

Influence of the emollient on emulsions containing lamellar liquid crystals: from molecular organization towards applicative properties

Terescenco

Savary

Picard

et al. 2018

Intern J of Cosmetic Sci

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show abstract

“…A caracterização reológica dos géis base de carbopol ® (C1, C2, C3 e C4), noveon ® (N1, N2, N3 e N4) e da mistura de carbopol ® e noveon ® (CN1, CN2, CN3, CN4, CN5 e CN6) consistiu na avaliação da influência dos polímeros usados, suas concentrações e em função da temperatura, já que os ensaios foram realizados a 25 o C (temperatura ambiente/armazenamento) e 37 o C (temperatura corporal). Nas (AULTON, 2005;PRESTES et al, 2012). Esse resultado já era esperado, já que geralmente sistemas coloidais, como os géis, têm tal propriedade (AULTON, 2005).…”

Section: Caracterização Reológica Dos Géis Baseunclassified

“…Ainda quanto à característica pseudoplástica indica que a viscosidade aparente do sistema diminui, com o aumento da tensão de cisalhamento (AULTON, 2005;PRESTES et al, 2012). Como os géis de carbopol ® são de material polimérico, (BETTINI et al, 1994;RICCI et al, 2005 Figura 62 -Cromatograma de uma solução de NYS MP a 0,05 mg/mL (solvente fase móvel), com coluna C18 de fase reversa, 4,6 x 150 mm, 5 µm.…”

Section: Caracterização Reológica Dos Géis Baseunclassified

Obtenção de gel mucoadesivo de nistatina para o tratamento da candidíase oral. Desenvolvimento e caracterização de dispersões sólidas de nistatina

Aguiar¹

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foram aliviadas quando via seu rosto a me esperar na chegada, com seu sorriso cativante. Meu amor, te amo e obrigada por tudo! Agradeço aos meus queridos pais Luiz e Gina, por todos os anos de cuidado, incentivo, amor e carinho. Hoje posso dizer que o que sou é fruto de toda dedicação, zelo e alegria com cada coisa simples que fazia, e que alegrava o coração de vocês. Sempre pude seguir em frente, porque ao olhar para trás, com medo e excitante, via os rostos de vocês afetuosos e me encorajando, e isso me enchia de determinação para seguir em frente. Pai e mãe, sempre serei a eterna garotinha de vocês. Agradeço ao vovô Justo e à vovó Lolô, in memorian, pelas lindas tardes que passei em sua casa durante minha infância. Se fechar os olhos, ainda posso sentir o cheiro da casa, ouvir suas vozes e até correr pelo corredor... Momentos felizes que nunca esquecerei! Agradeço ainda a vovó Domingas pelo seu carinho.

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Interaction between ethoxylated emulsifiers and propylene glycol based solvents: Gelation and rheology study

Shrivastava

Das

2019

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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Rheological Measurements and Thermal Characterization of Lamellar Gel Phase Emulsions Developed with Cetearyl Alcohol/Nonionic Ethoxylated Surfactants

Cited by 4 publications

References 23 publications

Influence of the emollient on emulsions containing lamellar liquid crystals: from molecular organization towards applicative properties

Influence of the emollient on emulsions containing lamellar liquid crystals: from molecular organization towards applicative properties

Obtenção de gel mucoadesivo de nistatina para o tratamento da candidíase oral. Desenvolvimento e caracterização de dispersões sólidas de nistatina

Interaction between ethoxylated emulsifiers and propylene glycol based solvents: Gelation and rheology study

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