Materials Literature
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We report a unified set of emulsion polymerization processes for the synthesis of a series of spherical and nonspherical magnetite−polystyrene (Fe 3 O 4 −PS) composite colloids with the superparamagnetic cores concentrically or eccentrically positioned inside polystyrene shells. The interfacial tension between the ino…
BACKGROUND: Drug delivery and penetration into neoplastic cells distant from tumor vessels is critical for the effectiveness of solid tumor chemotherapy. We hypothesized that 10- to 20-nm nanoassemblies of phospholipids containing doxorubicin would improve the drug's penetration, accumulation, and antitumor activity.…
Abstract The flame retardancy mechanisms of three aryl phosphates, triphenyl phosphate (TPP), resorcinol bis(diphenyl phosphate) (RDP) and bisphenol A bis(diphenyl phosphate) (BDP), in a polycarbonate/acrylonitrile–butadiene–styrene (PC/ABS) blend are investigated and compared. Further, the influence of polytetrafluor…
Preface. Acknowledgments. 1 Introduction. 1.1 Historical Background. 1.2 Basic Experimental Approach. 1.3 Description of Electrostatic Spinning. 1.4 Nanofiber Applications Areas. 2 Introduction to Polymer Solutions. 2.1 Average Molecular Weight. 2.2 Selecting Solvents: Solubility Parameter. 2.3 Thermodynamic Criterion…
Abstract A new type of extrusion apparatus with a hydraulic vibration field was self‐developed to study the effects of vibration on the rheological behavior, mechanical properties, and morphology of high‐density polyethylene (HDPE) during the process of extrusion. In the research, the morphology and mechanical propert…
Pasty biodegradable polymers that can be mixed with drugs at room temperature and injected to tissue as neat composition are advantageous as they allow simple preparation and delivery of drugs, particularly for heat sensitive drugs. A series of biodegradable pasty poly (ester-anhydride)s were prepared from alkanedicar…
Abstract A polycarbonate (PC)/ poly (styrene‐ co ‐acrylonitrile) (SAN) alloy modified with styrene‐ethylene‐butylene‐styrene (SEBS) block copolymer was prepared and the influence of SEBS content, PC content, and types of modifier on Izod notched impact strength, tensile strength, flexural strength, and Vicat softening…
Bismuth - sulphur quantum dots can be silver enhanced by autometallography (AMG). In the present study, autometallographic silver enhanced bismuth-sulphur nanocrystals were isolated from unfixed cryo-sections of kidneys and livers of rats exposed to bismuth (Bi207) subnitrate. After being subjected to AMG all the orga…
A phase transformation of mesoporous organosilicas from 2D-hexagonal P6mm to cubic Pm3n phase can be induced by the organotrialkoxysilane with hydrophilic pendant group with the aid of methanol during the co-condensation of 1,2-bis(trimethoxysilyl)ethane (BTME) and (EtO)(3)Si-R (R = L-prolinamide, trans-(1R,2R)-diamin…
White‐light emission was achieved by activating yttrium oxyorthosilicate with two rare‐earth elements, (Y 1− m − n Ce m Tb n ) 2 SiO 5 . Ce 3+ strongly absorbs at λ ex =358 nm and produces a broad, mainly blue emission with a tail that extends out to 600 nm (orange), and transfers energy efficiently to Tb 3+ , which p…
To test the potential of heterogeneous catalysts for the nylon-6 synthesis from 6-aminocapronitrile, a number of zeolites, aluminum silicate, and metal oxides were tested as catalysts for the model reaction of pentanenitrile with water and hexylamine to N-hexylpentanamide. All zeolitic and aluminum silicate systems sh…
As-produced carbon nanotubes often contain a fraction of impurities such as metal catalysts, inorganic supports, and carbon by-products. These impurities can be partially removed by using acidic dissolution. The resulting nanotube materials have to be dried to form a powder. The processability of nanotubes subjected t…
Abstract In this study, ethylene/styrene interpolymer (ESI) was used as compatibilizer for the blends of polystyrene (PS) and low‐density polyethylene (LDPE). The mechanical properties including impact, tensile properties, and morphology of the blends were investigated by means of uniaxial tension, instrumented fallin…
Abstract In the synthesis of mesoporous materials, the use of a template with an adequate porosity is normally favoured. As far as silica is concerned, many sophisticated procedures directed towards this goal have been published. It is already well documented that rice hull contains relatively pure silica after combus…
The stability of isotropic (I), nematic (N), smectic A (Sm A), and hexatic (Hex) liquid crystalline phases is studied for a fluid of molecules with a rod-like shape and dispersive interactions dependent on orientation. The fluid is modeled with the spherocylindrical Gay-Berne-Kihara interaction potential proposed in a…
The plasmon resonance was measured for two-dimensional arrays of L-shaped Ag nanoparticles fabricated by electron beam lithography. A variety of particle sizes were studied with nominal total edge lengths of ∼150 nm, 63 nm arm widths, and 30 nm height. The single nanoparticle localized surface plasmon resonance (LSPR)…
Abstract Cationic dyeable polycaproamide (CD‐PCA) and cationic dyeable poly(trimethylene terephthalate) (CD‐PTT) polymers were extruded (in ratios 75/25, 50/50, and 25/75) from one melt twin‐screw extruders to prepare three CD‐PCA/CD‐PTT polyblended polymers and then spin fibers. This work examines the rheology, therm…
ZnO nanocrystals with various morphologies such as nanorod arrays, flower like assemblies, spherical particles, hexagonal cones, and self assembled microstructures were prepared by a solvothermal approach. It was observed that morphology of the ZnO nanostructures were very much solvent dependent in solvothermal approa…
A simple steam-assisted solid phase synthesis method was developed for synthesis of boehmite nanowires in the presence of TEAOH surfactant. The boehmite nanowires had uniform diameters (12-16 nm) and length up to 1-2 microm. The morphology of the nanostructured wires was well preserved after being converted to pure ga…
We have performed first-principles calculations to study the structural and polarization properties of short-period $\mathrm{Sr}\mathrm{Zr}{\mathrm{O}}_{3}∕\mathrm{Sr}\mathrm{Ti}{\mathrm{O}}_{3}$ (SZO/STO) superlattices. The in-plane lattice constant of the superlattice expands as the SZO ratio increases. The SZO/STO…