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Post by skyship on Apr 1, 2014 17:36:35 GMT -5
Even students wonder what they are. www.chemicalforums.com/index.php?topic=33478.0=================== POLYSTYRENE - CLAY NANOCOMPOSITES VIA STAR POLYMERSFoundation Science Center, Research and Development Laboratories, Eastman Kodak Company, Rochester NY, 14650 Star polymers represent a special case of branched macromolecules, distinguished by a structure comprising several chains radiating from a relatively compact hub. We have prepared a variety of star polymers with up to 10 arms by the “core-first” approach, using Atom Transfer Radical Polymerization (ATRP), acrylic or styrenic monomers, and specifically synthesized multifunctional initiators. The initiators were synthesized via the addition of a single monomer molecule to each site on a core bearing a plurality of sulfonyl chloride groups, producing “unimers.” For example, the figure below depicts the synthesis of 5 arm polystyrene www.icdd.com/profile/march05abs/Blanton_Poster-05.pdf
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Post by skyship on Apr 1, 2014 17:53:53 GMT -5
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Post by skyship on Apr 1, 2014 18:07:01 GMT -5
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Post by skyship on Apr 1, 2014 18:10:33 GMT -5
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Post by skyship on Apr 1, 2014 18:13:09 GMT -5
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Post by skyship on Apr 1, 2014 18:36:54 GMT -5
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Post by skyship on Apr 1, 2014 18:48:20 GMT -5
Unimers, polymersomes, niosomes...etc seem to be the new nanomeds. While janus particles? Hydrophobines? and NH3 cores are used for what? We focus fundamental studies on under - standing how different particle cores (hard inorganics vs. soft microgels), surface functionalities, sizes and dimensions influence the interfacial activity using pendant drop tensiometry (Fig. 3d,e). Besides artificial inorganic and polymeric Janus particles, DWI also investigates biobased Janus particles such as hydrophobines from fungi (Fig. 3b). Recent simulations and experiments showed that their high surface activity and the ability to organize ions for crystal growth can be utilized to facilitate biomineralization. www.dwi.rwth-aachen.de/fileadmin/SITE_MASTER/content/Dokumente/Highlight-Texte/Highlight_Janus_particles_and_hydrophobines.pdfDWI investigations? Special Issue "Biofunctional Polymers for Medical Applications" Keywords biofunctional polymer hydrogel protein adsorption cell binding biodegradable scaffolds tissue engineering drug delivery biomimetic, polymer-peptide conjugates www.mdpi.com/journal/polymers/special_issues/biopolymers_medical_apps
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Post by skyship on Apr 1, 2014 20:14:26 GMT -5
www.dwi.rwth-aachen.de/index.php?id=2BIOINTERFACE & BIOHYBRID SYSTEMS Biohybrid systems and control of bioreactions in material contact Essential points of this research program are two keynotes: 1. Via integration of biologic building blocks like enzymes, membrane and signal proteins into synthetic constructs the highly specific functionality of these components, e.g. catalytic activity, selective transport properties, molecular recognition and switchability can be exploited for synthetic materials. Fermentation and enzyme catalyzed synthesis more and more allow the preparation also of modified bio-macromolecules. These functional building blocks can be attached in a small proportion to synthetic polymers and can be optimized and developed further for a special material application. Therewith, the primacy of nature on highly precise structures can be made accessible for the development of active materials. 2. Upon contact of proteins, living cells and micro-organisms with material surfaces as well unspecific as highly specific reactions are triggered. Examples are denaturation, blood coagulation and also cell adhesion, impact on cell motility and biofilm generation. Via nano- and micro-structured finishing of material surfaces with biologic components we pursuit approaches to provoke specific biologic answers on such biomimetic surfaces which are beyond biocompatibility. www.dwi.rwth-aachen.de/index.php?id=410
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jonsi
Full Member
Posts: 111
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Post by jonsi on Apr 3, 2014 3:10:26 GMT -5
Hi skyship! Are we still looking at nanotechnology as a contributing factor? I always thought so.... I haven't seen nanotech mentioned on any other sites recently and I'm very interested in this.
Thanks!
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Post by skyship on Apr 3, 2014 18:18:39 GMT -5
Jonsi,
Yes, we are still looking at Nano, because the new forms are being used in that technology. However, it has been difficult sorting out the hogwash material, from the real deal. What Aqt post: BioAPI, may be the key. However, finding the products used and how used is what is difficult. I have found the link between constructed amyloids which many are saying is functional, but for what purpose? So, the construction of amyloid filaments to carry these products which can fold into unfolded proteins, thereby working their way into new constructions for purposes of control.
see the BioAPI thread.
S
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