Application of non-porous silica ultramicrospheres to high-performance liquid chromatographic column packings

Fabrication of Tunable Submicro‐ or Nano‐Structured Polyethylene Materials from Immiscible Blends with Cellulose Acetate Butyrate

“…Because of the low cost, ready availability in various forms, chemical inertness, mechanical properties and high specific proton density of polyethylene (PE) materials, many emerging applications of PE have been envisioned. For example, PE microspheres have been employed as core materials for fabricating hollow alumina microspheres and non‐porous silica ultramicrospheres for HPLC column packing 1, 2. PE fibers can serve as filtration materials, absorber materials of heavy particle irradiation for space exploration or precursors of carbon fibers in the presence of a catalyst 3–7.…”

Characterization of different RP-HPLC columns by a gradient elution technique

“…In order to achieve fast and high resolution of biopolymers a number of distinct criteria should be fulfilled by the stationary phases [12,13] and for this reason a new type of bonded phase has been developed using wide-pore silicas and improved bonding chemistry in order to furnish a soft and more homogeneous surface. Most recently a third-type of packing, non-porous stationary phases of very small (1-2 gm) particle size have also been developed for fast separations [14,15]. Most recently a third-type of packing, non-porous stationary phases of very small (1-2 gm) particle size have also been developed for fast separations [14,15].…”

One‐Pot Synthesis of Spheres‐on‐Sphere Silica Particles from a Single Precursor for Fast HPLC with Low Back Pressure

“…The small spheres can be attached to the large spheres by affi nity, [ 13 ] electrostatic interaction, [ 14 ] chemical linking, [ 15 ] or high-pressure impacting. [ 16 ] One-pot synthesis of uniform coreshell nanospheres ( ≈ 50 nm) with a Ag nanoparticle core and a thick mesoporous silica shell was reported by subsequent addition of AgNO 3 and tetraethyl orthosilicate (TEOS) with NaOH as a basic catalyst. [ 17a ] Silica@RF nanospheres ( ≈ 220 nm) were formed under the Stöber conditions in one-pot by utilizing the fast reaction rate of forming silica spheres and the slow rate of forming RF spheres.…”