Sorg och drömmar - nostalgi och tystnad : : surusta haaveisiin - nostalgiasta hiljentymiseen : Emotioner och narrativer 11-12.8.2008, Åbo

Aktuellt/Ajankohtaista

SYNTHESIS AND CHARACTERIZATION OF HDTMA-ORGANOCLAYS: INSIGHTS INTO THEIR STRUCTURAL PROPERTIES

This study aims to synthesize and characterize organoclays developed from an Argentinian montmorillonite (Bent) using hexadecyltrimethylammonium bromide (HDTMA-Br) as the intercalation agent. Subsequently, an adsorption mechanism is proposed. The obtained organoclays were more hydrophobic than the starting clay. Surfactant molecules were adsorbed initially through cation exchange in sites placed in the interlayer space of the clay. Adsorption in such sites continued until the interlayer space was saturated. Depending on the surfactant loading introduced during the intercalation process, different organizations of surfactant in the interlayer were obtained. Further adsorption of surfactant occurred in the mesopores generated by tactoids in the "house of cards" organization. This process kept surfactant molecules relatively free and out of the interlayer space.

Vatikaanin II konsiili pähkinänkuoressa

Kirjallisuusarvostelu

Anthropologists reflecting past, present and future

Raportti: Continuity through change: anthropological perspectives in the contemporary world. The annual convention of Finnish anthropologists in Tampere, 7-8 May, 2009.

Kerronta kutsui kesäkonferenssiin

Raportti: Narratives Across Space and Time: Transmissions and Adaptations ISFNR 15th Conference 21.-17.6.2009, Athens.

Kattava yleisesitys Suomen väestön tilasta ja sen kehityksestä

Kirjallisuusarvostelu

Aistien tietoa maailmasta

Saatteeksi

Paikan eettiset ulottuvuudet

Ajankohtaista: Examining the Ethics of Place. The American Folklore Societyn 121. vuotuinen tapaaminen 21.-25.10.2009 Idahon Boisessa.