Gene/Protein
Disease
Symptom
Drug
Enzyme
Compound
Pivot Concepts:
Gene/Protein
Disease
Symptom
Drug
Enzyme
Compound
Target Concepts:
Gene/Protein
Disease
Symptom
Drug
Enzyme
Compound
Query: EC:2.4.1.14 (
SPS
)
813
document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)
In this work, an asymmetric swelling-dissolving process of original submicrometer-sized decentered sulfonated polystyrene/silica (
SPS
/silica) particles in a ternary mixed solvent (water/ethanol/
heptane
) was first reported. Actinia-like and porous snowman-like
SPS
/silica composite particles are fabricated through tuning the composition of the ternary mixed solvent. Actinia-like particles, with a silica core embedded in a "blooming"
SPS
matrix, are obtained when the composition of the mixed solvent is 5 g/5 g/0.1 g (water/ethanol/
heptane
). If the amount of
heptane
in the mixed solvent is doubled, then porous snowman-like particles are produced. The TEM and SEM images show that silica particles are exposed in these two anisotropic
SPS
/silica composite particles compared with the original decentered
SPS
/silica particles. Considering the particles morphology and the swelling and dissolving performance of
SPS
in different solvents, the formation of the new-shaped anisotropic
SPS
/silica composite particles should be attributed to an asymmetric swelling-dissolving process; that is, the swelling-dissolving rate of
SPS
coating around the protruding silica part is faster than the other part of the composite particles. The anisotropic swelling-dissolving property of polymer/inorganic composite particles inspires a facile way to the fabrication of new composite particles.
...
PMID:Synthesis of anisotropic polymer/inorganic particles via asymmetric swelling-dissolving process. 2328 89
