A series of original amphiphiles prepared by Morita− Baylis−Hillman (MBH) coupling biobased furanic aldehydes with hydrophobic alkenes is explored. Structural variations result from the level of polarity on the furanic substrate, the type of activated alkenes (ester of amide), the alkyl chain length, and the presence of an unsaturation. The physicochemical properties such as the Krafft point, critical micellar concentration (CMC), and hydrophilic lipophilic behavior determined with the PIT-slope method have been explored. The glucosyloxymethyl furfural (GMF) derivatives exhibit higher water solubility than the succinyl hydroxymethyl furfural (SMF) and the HMF-derived ones. Saturation of the acrylic linkage results in slightly lower CMC for GMF-derived compounds by the enhanced solvation of the unsaturation. As expected, increasing the alkyl chain length diminishes the water solubility, the CMC, and the hydrophilicity. The decreasing hydrophilic behavior of surfactants is as follows: Gi > GiH > HSi. For the shorter HMF amphiphiles, the order is HiN > Hi ≈ HiH. These surfactants cover a wide range of HLB values. The dodecyl GMFG12is as hydrophilic as C 12 E 6 , and the hexadecyl SMFHS16is much more hydrophobic than SPAN 40. Formation of stable emulsions with two cosmetic oils of different polarity is very encouraging for a possible application of this new family of biobased surfactants.

Scabiosa Atropurpurea sub. Maritima L. est une plante de la famille des Dipsacacée utiliséedans la médecine traditionnelle pour le traitement de certaines maladies de peau, en particulier la gale. Notre étude porte sur l’évaluation par dosage spectrophotométrique des polyphénols et des flavonoïdes. Le dosage des phénols totaux montre que la teneur la plus élevée des phénols a été mesurée dans l’extrait méthanolique, avec une valeur égale à 1,303 mg EAG/g ES, suivi par les extraits hexanique et chloroformique respectivement. Le dosage des flavonoïdes a révélé que l’extrait méthanolique renferme un maximum de flavonoïdes, avec un taux de 0,613 mg EQ/g ES. Nous avons également effectué les dosages des tanins et des anthocyanes.

In this article we describe work on the synthesis of bolaphile biomimics composed of glucose head groups and steroidal units linked together by a methylene chain of varying length. The condensed phases formed by self-organization of the products as a function of temperature were characterized by differential scanning calorimetry and thermal polarized light microscopy. The results of these studies show that the thermal stabilities of the lamellar mesophases formed vary linearly as a function of increasing aliphatic composition, which reflects a linear hydrophobic-hydrophilic balance with respect to transition temperatures.