INFLUENCE OF XYLENE ON THE TEXTURAL FEATURES OF THE HYBRID GEL MATERIALS

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Synthesis and characterization of sol-gel mesoporous organosilicas functionalized with amine groups

In this work we report on the synthesis of porous amine functionalized organosilica materials prepared by co-condensation of tetraethyl orthosilicate (TEOS) and bis-[3-(trimethoxyosilyl)propyl] amine (BTPA). The gels were prepared through a one-step sol-gel process catalyzed by the - NH- groups of BTPA. A block copolymer poly(ethylene glycol)-block-poly(propylene glycol)-block-poly(ethylene glycol) (P123) was employed as a porogen using the surfactant template method. The resultant materials have been characterized by nitrogen gas sorption, powder X-ray diffraction, FT-IR, SEM, Si-29 MAS NMR, C-13 CP MAS NMR and TG/DTA analysis. In order to examine the potential of these materials as adsorbents for heavy metals, Hg(II) adsorption experiments were also performed. The hybrids showed mesoporous disordered structure as evidenced by N2 adsorption-desorption isotherms and XRD patterns. Adsorption of Hg(II) ions from aqueous solutions showed high capacities suggesting that these materials could be used as adsorbents for Hg(II) ions in acid solutions. (C) 2013 Elsevier B.V. All rights reserved

Game changers in science and technology - now and beyond

The recent devastating pandemic has drastically reminded humanity of the importance of constant scientific and technological progress. A strong interdisciplinary dialogue between academic and industrial scientists of various specialties, entrepreneurs, managers and the public is paramount in triggering new breakthrough ideas which often emerge at the interface of disciplines. The following sections, compiled by a highly diverse group of authors, are summarizing recently achieved game-changing leaps in science and technology. The game-changers range from paradigm shifts in scientific theories to make impact over several decades to game-changers that have the potential to change our everyday lives tomorrow. The paper is an interdisciplinary dialogue of relevance for academic interdisciplinary thinkers, large corporations' strategic planners, and top executives alike; it provides a glimpse into what further breakthroughs the future may hold and thereby intends to spark new ideas with its readers

Студентска научна конференция "Здравеопазването-днес и утре", 22 Май 2013, Варна

Варненски медицински форум (Varna Medical Forum) V. 2, Suppl 4 (2013