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Polyethylene oxide shear stability

The addition of water-soluble polymers such as polyethylene oxide (PEO) or polyvinyl alcohol (PVA) into the synthetic mixture of the C TMAX-HN03-TE0S-H20 system (n = 16 or 18 X = Br or Cl) under shear flow is found to promote uniformity and elongation of rope-like mesoporous silica. The millimeter-scaled mesoporous silica ropes are found to possess a three-level hierarchical structure. The addition of water-soluble polymer does not affect the physical properties of the silica ropes. Moreover, further hydrothermal treatment of the acid-made material under basic ammonia conditions effectively promotes reconstruction of the silica nanochannels while maintaining the rope-like morphology. As a result, a notable enhancement in both thermal and hydrothermal stability is found. [Pg.7]


See other pages where Polyethylene oxide shear stability is mentioned: [Pg.150]    [Pg.364]    [Pg.275]    [Pg.283]    [Pg.286]    [Pg.86]    [Pg.261]    [Pg.1]    [Pg.97]    [Pg.109]    [Pg.259]    [Pg.261]    [Pg.310]    [Pg.124]    [Pg.361]   
See also in sourсe #XX -- [ Pg.204 ]




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OXIDATION OXIDATIVE STABILITY

Oxidative stability

Oxidative stabilizers

Polyethylene oxide

Shear stability

Stability oxides

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