CONSIDERABLE EFFORTS HAVE BEEN RECENTLY DEVOTED TODEVELOP HIGH PERFORMANCE THERMAL INSULATION MATERIALS. SILICAAEROGELS ARE AN INNOVATIVE ALTERNATIVE TO COMMON INSULATION DUETO THEIR HIGH INSULATION PERFORMANCE. AEROGEL HAS IN FACT THELOWEST THERMAL CONDUCTIVITY AMONG SOLID MATERIALS. DESPITEHIGH THERMAL PERFORMANCE, THE MATERIAL IS VERY FRAGILE. ALSO THECOST OF THE MATERIAL REMAINS HIGH FOR COST SENSITIVEINDUSTRIES. IN THIS PAPER SOME STRATEGIES TOWARDSAPPLICATION DEVELOPMENT OF SILICA AEROGELS ARE PRESENTED.

THERE ARE SEVERAL METHODS TO PREPARE nanocompositeS; (A) IN SITU POLYMERIZATION OF A MONOMER USING AN INITIATOR TETHERED TO THE SILICATE SURFACE OR COPOLYMERIZATION OF MONOMERS BY A SILICATE-ANCHORED BIFUNCTIONAL INITIATOR, (B) SOLUTION BLENDING, AND (C) MELT BLENDING. TO OUR KNOWLEDGE PREPARATION OF A nanocomposite USING HYDROPHOBIC THERMOSENSITIVE POLYMER AND HYDROPHILIC CLAY HAS BEEN RARELY REPORTED [1, 2]...

BACKGROUND: PORPHYRIN DERIVATIVES PRESENT IN ALL LIVING SYSTEMS OF BIO CHEMISTRY. THEY FORM THE MAIN STRUCTURE OF PIGMENTS LIKE CHLOROPHYLL AND HEME, WHICH INVOLVE IN IMPORTANT PROCESSES OF LIFE. SELF ASSEMBLED NANOSTRUCTURE ARE OF GREAT INTEREST. ON THE OTHER HAND, SILVER (AG) AND GOLD (AU) NANOPARTICLES HAVE HIGH THERAPEUTIC POTENTIAL AND EXHIBIT GOOD ANTIMICROBIAL ACTIVITY. THESE NANOPARTICLES HAVE A WIDE RANGE OF ANTIMICROBIAL ACTIVITIES AND EXHIBIT HIGH PERFORMANCE EVEN AT A VERY LOW CONCENTRATION. THEY HAVE BEEN IDENTIFIED TO POSSESS GOOD POTENTIAL FOR THE TREATMENT OF CANCER. IN THIS WORK, nanocomposite PORPHYRINS WAS SYNTHESIZED AND CHARACTERIZED BY TEM, UV-VIS, AND AFM...

ADDING OF NANO-PARTICLES IN POLYMERIC MEMBRANES CAN MAKE INCREASE IN PENETRANTS SORPTION AND MAKES DECREASE IN DIFFUSION COEFFICIENT OF THE MEMBRANE. THE AMOUNT OF SORPTION IS DEPENDENT ON THE PENETRANTS CONDENSABLITY AND NANO-PARTICLE TYPES. IN THIS PAPER, THE MOST FAMOUS PERMEATION MODEL FOR nanocomposite POLYMERIC MEMBRANES FILLED WITH IMPERMEABLE PARTICLES ARE DISCUSSED AND A WAY FOR EMBEDDING SORPTION EFFECT IN GAS PERMEATION MODELS OF nanocomposite MEMBRANES IS INTRODUCED. THEN A NEW MODEL IS PROPOSED THAT OFFERS GOOD PREDICTION FOR A KIND OF nanocomposite MEMBRANE.

POLYPROPYLENE (PP)/ORGANO MODIFIED MONTMORILLONITE (OMMT) COMPOSITES WERE PREPARED VIA SOLUTION INTERCALATION METHOD. THE CLAY DISPERSION WAS INVESTIGATED USING WIDE ANGLE X-RAY DIFFRACTION. THE INTERCALATION OF PP CHAINS IN CLAY SHEETS WAS INVESTIGATED IN TWO DIFFERENT PROCESSING METHODS (SOLUTION INTERCALATION AND MELT INTERCALATION). IT CAN BE CONCLUDED THAT OBTAINING INTERCALATED OR EXFOLIATED STRUCTURE VIA SOLUTION INTERCALATION METHOD IS EASIER THAN MELT INTERCALATION METHOD.

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