نتایج جستجو برای: poly vinyl pyrrolidone
تعداد نتایج: 88717 فیلتر نتایج به سال:
PVP (poly(vinyl pyrrolidone)) is a common polymer that behaves as a surface-regulating agent that shapes metal nanocrystals in the polyol process. We have used different polymers containing tertiary amide groups, namely PVCL (poly(vinyl caprolactam)) and PDMAm (poly(N,N-dimethyl acrylamide)), for the synthesis of gold polyhedrons, including octahedrons, cuboctahedrons, cubes, and higher polygon...
The function of a photocrosslinked poly(propylene fumarate) (PPF)/poly(N-vinyl pyrrolidone) (PVP) matrix for the sustained release of three ophthalmic model drugs, acetazolamide (AZ), dichlorphenamide (DP), and timolol maleate (TM), was investigated. The drugs differ in molecular weight and degree of dissociation in aqueous environments; both are parameters that significantly influence drug dif...
Abstract Metal oxides e.g., Al 2 O 3 and SiO loaded-hydrogel blended membranes composed of poly(vinyl alcohol)/poly(vinyl pyrrolidone) (PVA/PVP, PVA/PVP/Al , PVA/PVP/SiO /SiO ) were successfully prepared on precleared glass plates by dip coating method. Meanwhile, series obtained crosslinked hydride composite hydrogel using solution-casting Samples have been characterized for use in microelectr...
An easy method is proposed to prepare poly(vinyl pyrrolidone) (PVP) and poly(N-isopropylacrylamide) (PNiPAAm) nanogels with sizes less than 100 nm. The underlying principle dilute polymer solutions in acetone/water mixtures where acetone acts break tridimensional structure of water hence disrupting the H-bonds bridging coils causing separation shrinkage their sizes. Irradiation these by gamma-r...
cobalt ferrite (cofe2o4) nanorods were synthesized by iron chloride (fecl3.6h2o) and cobalt sulfate hexahydrate (coso4.7h2o) as precursor in the presence of ethylene glycol agent and poly vinyl pyrrolidone (pvp) surfactant. the samples were characterized to identify the physical properties. xrd pattern of cobalt ferrite samples showed the structure of body center cubic (bcc) structure. the diam...
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