3 research outputs found
ANTIMICROBIAL NANOMATERIALS FOR FOOD PACKAGING APPLICATIONS
ABSTRACT: Food packaging industry presents one of the fastest growing industries nowadays. New trends in this industry, which include reducing food as well as packaging waste, improved preservation of food and prolonged shelf-life together with substitution of petrochemical sources with renewable ones are leading to development of this industrial area in diverse directions. This multidisciplinary challenge is set up both in front of food and material scientists. Nanotechnology is recently answering to these challenges, with different solutions-from improvements in materials properties to active packaging solutions, or both at the same time. Incorporation of nanoparticles into polymer matrix and preparation of hybrid materials is one of the methods of modification of polymer properties. Nano scaled materials with antimicrobial properties can act as active components when added into polymer, thereby leading to prolonged protective function of pristine food packaging material. This paper presents a review in the field of antimicrobial nanomaterials for food packaging in turn of technology, application and regulatory issues
The use of artificial neural networks for mathematical modeling of the effect of composition and production conditions on the properties of PVC floor coverings
The application of PVC floor coverings is strongly connected with their
end-use properties, which depend on the composition and processing
conditions. It is very difficult to estimate the proper influence of the
production parameters on the characteristics of PVC floor coverings due to
their complex composition and various preparation procedures. The effect of
different processing variables (such as time of bowling, temperature of
bowling and composition of PVC plastisol) on the mechanical properties of PVC
floor coverings was investigated. The influence of different input parameters
on the mechanical properties was successfully determined using an artificial
neural network with an optimized number of hidden neurons. The Garson and
Yoon models were applied to calculate and describe the variable contributions
in the artificial neural networks. [Projekat Ministarstva nauke Republike
Srbije, br. III 45022
Polymerization of organized monomers
The current explanations of olefin and vinyl monomer polymerization propose that monomer molecules are successively added one by one to the growing polymer chain. This may be true if the monomer molecules exist as individual species in a polymerizing system, e.g. in dilute solutions of monomer. There are cases, however, in which monomer molecules are organized: bulk liquid monomer, solid monomer, a monomer monolayer adsorbed on a support, etc. Various supra-molecular species and particles of monomer exist in such cases. In the 1960-ties, Semenov, Kargin and Kabanov proposed a theory of organized monomer polymerization. In the last 25 years, our research group has further developed and applied that theory to various polymerizing systems: the radical polymerization of compressed ethene gas, the radical polymerization of liquid methyl methacrylate, olefin polymerization by transition metals and by Al-based catalysts. An outline of the main achievements are presented in this article