Nanocomposite hybrid approach

Nanocomposites- hybrid polymer-inorganic nanoconq )osites for dramatic improvement over the properties of traditional polymers without sacrificing density, processability or toughness as in conventional compositeZblend approaches dispersed carbon nanotubes in polymer fiber to provide inqrrovement in tensile and conqiressive prqrerties of Ugh performance polymer fibers. 

Zhang, J. Coombs, N. Kumacheva, E., A new approach to hybrid nanocomposite materials with periodic structures, J. Am. Chem. Soc. 2002, 124, 14512 14513... 

Research tools and fundamental understanding New catalyst design for effective integration of bio-, homo- and heterogeneous catalysis New approaches to realize one-pot complex multistep reactions Understanding catalytic processes at the interface in nanocomposites New routes for nano-design of complex catalysis, hybrid catalytic materials and reactive thin films New preparation methods to synthesize tailored catalytic surfaces New theoretical and computational predictive tools for catalysis and catalytic reaction engineering... 

The new water soluble highly stable metal-polysaccharide nanocomposites of noble metals have been fabricated within the framework of the new approach to the synthesis of hybrid nanosized materials on the basis of arabinogalactan. Distinctive optical properties of the nanoparticles are demonstrated as the plasmonic resonance. Nanobiocomposites with target optical characteristics have a great potential to design promising multifunctional materials with controlled optical properties as well as new optical systems and optical markers in medicine. 

Recent studies have explored different mechanisms of antimicrobial action by designing hybrid nanomaterials that provide a new approach to killing microbes. One option employs a low-cost methodology to prepare nanosized copper-PANI nanocomposite materials with enhanced antibacterial and antifungal properties. Copper oxide nanocrystals immobilised in a PANI matrix coated onto fabrics for the improvement of antimicrobial activity could be an excellent application in coating technology. 

However, the small particle size also brings issues involving mass transport and excessive pressure drops when applied in a fixed bed or any other flow-through systems, as well as certain difficulties in separation and reuse, and even possible risk to ecosystems and human health caused by the potential release of nanoparticles into the environment. An effective approach to overcoming the technical bottlenecks is to fabricate hybrid nanocomposites... 

Following a related approach, Castelvetro et al. reported the formation and properties of hybrid latex films resulting from the coalescence of low 7 poly(BA-co-MMA-co-MPTMS) terpolymer latex particles coated by a silica shell [78], The latex was synthesized at neutral pH by semi-continuous emulsion polymerization under starved-feed conditions in order to protect the MPTMS monomer from premature hydrolysis and condensation reactions. A substantial amount of free silanols were therefore available for further reaction with the silica precursor. In order to avoid the formation of a densely crosslinked silica network around the latex core, which may significantly alter film formation, the pH was kept at around 2 (at this pH, hydrolysis is promoted and condensation is significantly retarded). TEM and AFM studies of the nanocomposite film indicated that the silica shell formed a continuous percolating network throughout the polymer matrix. A porous film of interconnected hollow silica spheres was next elaborated by thermo-oxidative decomposition of the organic phase. 

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