polymer – Page 3 – TechConnect Briefs

Synthesis and evaluation of T85-LPEI copolymers for pDNA delivery

Wang M.X., Carolinas Medical Center, US

In this study, a series of low molecular weight PEI (LPEI) modified with Tween 85 were prepared by varying feed ratio and PEI size (Mw: 0.8k, 1.2k and 2.0k Da) for gene delivery. The Mws [...]

Photocatalytic Silver/Silver Halide Polymer Nanocomposites

Tate E., Johnston J.H., Victoria University of Wellington, New Zealand, NZ

Recently it has been shown that hybrid silver/silver halide nanoparticles exhibit interesting photocatalytic properties, and are known plasmonic photocatalysts. Enhanced photostability and photocatalysis are observed in the nanoparticles due to the surface plasmon resonance of [...]

Using Magnetic Impact Coating Technique to Prepare Carbon Nanotube-Reinforced Polymer Nanocomposites

Narh K.A., New Jersey Institute of Technology, US

The combination of high aspect ratio, small size, very low density, and more importantly, excellent physical properties, such as extremely high mechanical strength and stiffness, high electrical and thermal conductivity, make carbon nanotubes (CNTs) perfect [...]

Natural polyphenols as pro-ecological antioxidants and pigments for polymer composites

Masek A., Zaborski M., Lodz University of Technology, PL

In our studies, we propose the use of natural, pro-ecological substances such as polyphenols to protect elastomers against ageing. This natural compounds were incorporated into ethylene-norbornene (COC-material is commercially available under the name of TOPAS); [...]

Probing Critical Particle to Polymer Size Ratios for Non-Einstein Behavior in Polymer Nanocomposites

Schmidt R.G., Gordon G.V., Swier S., Cosgrove T., Dow Corning Corporation, US

Enhanced studies of polymer nanocomposites(PNCs)has led to multiple discoveries of PNC's that exhibit viscosity behavior counter to the classical behavior for filled systems originally defined by Einstein(1). Opposed to the viscosity increase typically observed for [...]

Correlating electrical and structural properties in surface layer of carbon nanotube polymer composite

Pavlenko E., Tishkova V., Puech P., Bacsa W.S., CNRS and University of Toulouse, FR

We have recently shown that annealing of agglomerated carbon nanotubes on thermoplast polymers form surface composite films (70 micrometers) (1). This has been explained by preferential carbon nanotubes absorption of infrared radiation leading to local [...]

Structural and Thermo-Mechanical Characterization of Calcium and Barium Alginate Films

Vidal-Urquiza T.K., University of Puerto Rico, PR

Alignate films require its precise characterization of mechanical and thermo-mechanial properties, which are useful for several potential applications in environmental protection, biotechnology, and others areas. Therefore, this work study the aforementioned film properties of sodium [...]

Structural and Thermo-Mechanical Characterization of Calcium and Barium Alginate Films

Vidal-Urquiza T.K., University of Puerto Rico, PR

Alignate films require its precise characterization of mechanical and thermo-mechanial properties, which are useful for several potential applications in environmental protection, biotechnology, and others areas. Therefore, this work study the aforementioned film properties of sodium [...]

Polymalic acid-based nanodrugs: Anti-tumor efficacy and host compatibility

Holler E., Ding Hui, Patil R., Portilla J., Inoue S., Gangulum P., McNeil S.E., Patri A., Dobrovolskaia M.A., Black K.L., Ljubimova J.Y., Cedars-Sinai Medical Center, US

A polyanionic drug carriers is presented that penetrates biobarriers and targets molecular cancer markers of human breast and brain cancer. The carrier platform is poly(beta-L-malic acid) (PMLA), which is highly water soluble and biodegradable to [...]

Designing Responsive Materials with Chemically Amplified Sensitivity to NIR light

Fomina N., McFearin C., Sermsakdi M., Morachis J., Almutairi A., University of California at San Diego, US

We employ near infrared (NIR) light as an external trigger for controlled material degradation and targeted release of a payload. NIR light can penetrate through tissues to an appreciable depth without scattering or damaging it. [...]