Interpenetrating Polymer Networks as Innovative Drug Delivery Systems
Also, the modification and sterilization can be achieved in a single step and hence it is a cost-effective process to modify biopolymers having their end use specifically in biomedical application.5.3. IPNs have shown superior performances over the conventional individual polymers and, consequently, the ranges of applications have grown rapidly for such class of materials
Alivisatos Group Publications
The kinetic parameters extracted from our single-molecule cleavage trajectories agree well with values obtained in bulk through other methods and confirm well known features of the cleavage process, such as DNA bending before cleavage. This strong enhancement arises from a controlled optical antenna effect in patterned core-shell nanostructures that consist of absorbing semiconductors and nonabsorbing dielectric materials
The interfacial interactions between CNCs and PAA could be further improved by heat-induced esterification between the CNC surface hydroxyls and PAA carboxyl groups, which produce covalent crosslinks at the PAA-CNC interfaces, render the nanocomposite fibrous mats insoluble in water, and make mats to be more thermally stable and far more superior tensile properties. Alignment of electrospun nanocomposite fibers reinforced with CNCs has been achieved by many techniques, including by running the fibers over a hollow spool with high rotation (Olsson et al., 2010), an aluminium frame with openings (Changsarn et al., 2011), a rotating mandrel covered with aluminium foil (Dong et al., 2012)
Braiding is suited to the manufacture of narrow width flat or tubular fabric and is not as capable as weaving in the production of large volumes of wide fabrics. In addition, the ability to recycle FRP composites is limited and, unlike steel and timber, structural components cannot be reused to perform a similar function in another structure
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They include not only the minerals and organic building blocks of rubber, but also various plasticizers and accelerators used during the vulcanizing process. Int 918 - By Council Member Stewart - A Local Law to amend the administrative code of the city of New York, in relation to the surface areas of playgrounds and playing fields
Surface-modified nanoparticles endow coatings with combined properties
Particularly the surfaces of workpieces or mouldings are expected to exhibit several different functions at one and the same time, depending on the industry. Fabrication route improves the properties of aluminum-based nanocomposites September 24, 2014 One challenge in producing strong, elastic and hard-wearing nanocomposites is obtaining an even distribution of the nanoparticles in the metal matrix
Therefore, attention must be switched, as quickly as possible, towards addressing them.In this regard, global research should be directed towards advanced technologies able to create a clean environment. Moreover, by virtue of slip flow at the nanofiber surface (for the nanofibers with diameter smaller than 500 nm), drag force on the fiber and consequently pressure drop decreases
Recently, their use as polymer fillers has allowed to increasingly extending their application range to innovative areas such as medical and biological fields as well as in sensors, filtration membranes, energy storage and novel catalysis routes
However, inherent shortcomings of natural polymer-based packaging materials, such as low mechanical properties and low water resistance, are causing a major limitation for their industrial use
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