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The effect of uni-axial orientation on macroporous membrane structure
Springer Science and Business Media LLC - Tập 13 Số 1 - Trang 61-72 - 2006
The effect of uni-axial stretching on the material properties of macroporous
poly(vinylidene fluoride) (PVDF) membranes was experimentally determined. Atomic
force microscopy (AFM), differential scanning calorimetry, scanning electron
microscopy, and digital image analysis were used to characterize physical
structure of the membrane before and after stretching. The effects of strain
rate, temperat...
Porous SiO2–TiO2–ZrO2 Obtained from Polymeric Systems Prepared by the Sol–Gel Process
Springer Science and Business Media LLC - Tập 8 - Trang 303-309 - 2001
An experimental strategy was developed to obtain Si–Ti–Zr transparent sols via
the sol-gel process. The chelating agents isoeugenol
(2-methoxy-4-propenylphenol, isoH), salicylaldehyde (2-hydroxybenzaldehyde,
salH), and itaconic anhydride (2-methylenesuccinic anhydride, anhH) were
employed separately to stabilize monomeric Ti and Zr precursors, in order to
control their chemical reactivity, avoidin...
A comparative study of perfluorinated and non-fluorinated UiO-67 in gas adsorption
Springer Science and Business Media LLC - Tập 27 Số 6 - Trang 1773-1782 - 2020
Mechanical Properties of Porous Materials
Springer Science and Business Media LLC - Tập 6 - Trang 359-368 - 1999
Porous materials are commonly found in nature and as industrial materials such
as wood, carbon, foams, ceramics and bricks. In order to use them effectively,
their mechanical properties must be understood in relation to their
micro-structures. This paper studies the mechanical properties of a few common
porous materials: carbon rods, ceramics, polymeric foams and bricks. The
characterisation of po...
Uniform and ordered periodic mesoporous organosilica thin films by a facile solution growth approach
Springer Science and Business Media LLC - Tập 25 - Trang 489-494 - 2017
We demonstrate a novel solution growth method for synthesis of uniform and
ordered periodic mesoporous organosilica (PMO) thin films on substrate. The
approach is simple and facile, in which a substrate is immersed into a solution
containing 1,2-bis(triethoxysilyl)ethane (BTSE) precursor,
cetyltrimethylammonium bromide (CTAB) surfactant template, ammonia catalyst,
ethanol, and decane. The precurso...
Phase transition of mesoporous SiO2 impregnated with an organic templating agent by post-synthetic microwave heating
Springer Science and Business Media LLC - Tập 15 - Trang 93-99 - 2006
Mesoporous silica SBA-15 samples were subjected to microwave heating for
10–40 min at 393 and 443 K after dry-impregnation with TPAOH
(tetrapropylammonium hydroxide) to prepare a mesoporous material with
zeolytically ordered pore walls. Physicochemical properties of the materials
prepared were characterized by XRD, N2 adsorption at 77 K, SEM, TEM, UV–vis and
FT-IR spectroscopies. These investigati...
Controlled-release drug carriers based mesoporous silica spheres with hierarchical hollow/nano structure
Springer Science and Business Media LLC - Tập 24 - Trang 241-248 - 2016
Mesoporous silica spheres with hierarchical hollow/nano structure (MSSH-H/N)
have been successfully prepared by a template-guided approach, in which
cetyltrimethyl ammonium bromide (CTAB) and polystyrene (PS) emulsion was used as
the template of mesopores and hollow core, respectively. A consecutive template
mechanism and the formation of the hierarchical hollow/nano structure were
proposed on bas...
Self-Bonded Zeolite Beta/MCM-41 Composite Spheres
Springer Science and Business Media LLC - Tập 12 - Trang 193-199 - 2005
Self-bonded zeolite Beta/MCM-41 composite spheres were prepared using a two-step
synthesis procedure. In the first step, mesoporous zeolite Beta spheres were
obtained using anion exchange resin as macrotemplate. In the second step, the
MCM-41 or Al-MCM-41 was grown both on sphere surfaces and in the pore structure
of the pre-formed zeolite Beta spheres. Finally, the templating agents used in
the s...
Effect of pore structure of SBA-15 on immobilization of hemoglobin
Springer Science and Business Media LLC - Tập 15 - Trang 653-659 - 2007
Immobilization of hemoglobin (Hb) in SBA-15 with various pore sizes by physical
adsorption was studied. The structure changes of mesoporous SBA-15 before and
after the immobilization of Hb were characterized by N2 adsorption isotherms,
X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR) and
Ultraviolet-visible spectroscopy (UV). The results indicate that SBA-15 is a
good suppor...
SEM–EDX and XRD characterization of zeolite NaA, synthesized from rice husk and aluminium scrap by different procedures for preparation of the initial hydrogel
Springer Science and Business Media LLC - Tập 20 - Trang 249-255 - 2012
A number of investigations have demonstrated that zeolite NaA could be
synthesized using Si, extracted from rice husk ash; however, experiments on
direct extraction of Si from rice husk (RH) are scarce. The main objective of
the present study was to explore the possibility to synthesize high-quality
zeolite NaA from RH and waste aluminium cans (as a source of Al), applying
different procedures for...
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