Dissolution behavior and solution properties of polyvinylalcohol as determined by viscometry and light scattering in DMSO, ethyleneglycol and water

Tacx, J.C.J.F.; Schoffeleers, H. M.; Brands, A.G.M.; Teuwen, Liliane

doi:10.1016/s0032-3861(99)00220-7

Cited by 62 publications

(39 citation statements)

References 9 publications

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“…Using light scattering measurements, we have followed the formation of micelles of poly(N-methyl-2-vinyl pyridinium iodide)-block-poly(ethylene oxide), P2MVP 38 454 show a coexistence of these micelles with larger aggregates. The experimental results were compared to a simple geometrical model, yielding cross-sections from 12-17 nm 2 and coronal volume fractions 60.03, implying that colloidal stabilisation can be achieved when coronal chains start to overlap.…”

Section: Discussionmentioning

confidence: 99%

“…We might speculate that these aggregates originate from the rather poor solubility of PVOH [37,38] or from interpolymer complexation between PVOH/PEO and PAA chains which is known to yield insoluble complexes under more acidic conditions; that is, pH <4 [39,40]. Khutoryanskiy et al [39,41] It has also been reported that water is only a marginal solvent for PVOH [37], and aggregation was observed in dilute aqueous solutions of PVOH homopolymers [38]. Note, however, that the marginally soluble vinyl alcohol monomers constitute only a minor part (614%) of the micellar corona.…”

Section: Micellar Structurementioning

confidence: 99%

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Electrostatic hierarchical co-assembly in aqueous solutions of two oppositely charged double hydrophilic diblock copolymers

Voets¹,

Keizer²,

Leermakers³

et al. 2009

European Polymer Journal

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The formation of spherical micelles in aqueous solutions of poly(N-methyl-2-vinyl pyridinium iodide)-block-poly(ethylene oxide), P2MVP-b-PEO and poly(acrylic acid)-block-poly (vinyl alcohol), PAA-b-PVOH has been investigated with light scattering-titrations, dynamic and static light scattering, and 1 H 2D Nuclear Overhauser Effect Spectroscopy. Complex coacervate core micelles, also called PIC micelles, block ionomer complexes, and interpolyelectrolyte complexes, are formed in thermodynamic equilibrium under charge neutral conditions (pH 8, 1 mM NaNO 3 , T = 25°C) through electrostatic interaction between the core-forming P2MVP and PAA blocks. 2D 1 H NOESY NMR experiments show no cross-correlations between PEO and PVOH blocks, indicating their segregation in the micellar corona. Self-consistent field calculations support the conclusion that these C3Ms are likely to resemble a 'patched micelle'; that is, micelles featuring a 'spheres-on-sphere' morphology.

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Section: Discussionmentioning

confidence: 99%

Section: Micellar Structurementioning

confidence: 99%

Electrostatic hierarchical co-assembly in aqueous solutions of two oppositely charged double hydrophilic diblock copolymers

Voets¹,

Keizer²,

Leermakers³

et al. 2009

European Polymer Journal

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“…The extent of hydrolysis and content of acetate groups in PVA affect the crytallizability and solubility of PVA [33]. PVA is soluble in highly polar and hydrophilic solvents, such as water, Dimethyl Sulfoxide (DMSO), Ethylene Glycol (EG), and N-Methyl Pyrrolidone (NMP) [34]. Water is the most important solvent for PVA.…”

Section: Polyvinyl Alcohol (Pva)mentioning

confidence: 99%

Water Soluble Polymers for Pharmaceutical Applications

2011

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Advances in polymer science have led to the development of novel drug delivery systems. Some polymers are obtained from natural resources and then chemically modified for various applications, while others are chemically synthesized and used. A large number of natural and synthetic polymers are available. In the present paper, only water soluble polymers are described. They have been explained in two categories (1) synthetic and (2) natural. Drug polymer conjugates, block copolymers, hydrogels and other water soluble drug polymer complexes have also been explained. The general properties and applications of different water soluble polymers in the formulation of different dosage forms, novel delivery systems and biomedical applications will be discussed.

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“…PVA is a synthetic polymer and has good physical properties; as an immobilization material, the PVA-immobilized granules inherited the merits of PVA. However, these granules contain many hydrophilic hydroxyl groups in their chemical structure, which results in the PVA-immobilized granules exhibiting certain water swelling properties and autocondensing tendencies [26]. Therefore, PVA-immobi- lized granules tended to conglutinate, which decreased the specific surface area of the immobilized granules and thus affected their stability.…”

Section: Stability Of the Immobilized Granulesmentioning

confidence: 99%

S47 Study on Anaerobic Ammoniumoxidation (ANAMMOX) Sludge Immobilized in Different Gel Carriers and Its Nitrogen Removal Performance

CHEN¹,

LI²,

DENG³

et al. 2015

JRST

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To maintain Anammox biomass, different materials were used as carriers to immobilize Anammox sludge. The adsorptive property, anaerobic ammonia oxidation activity, and stability of the particles were evaluated. The results indicated waterborne polyurethane (WPU) was the most suitable immobilizing material. In a continuous flow experiment, we further investigated the resistance to impact load and the anaerobic ammonia oxidation activity by increasing the influent load. It was found that for WPUimmobilized particles, no effluent SS or particles fracture was observed during the 66-day operation, and the WPU-immobilized particles showed a strong capability to retain sludge and good stability in the long-term.

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Dissolution behavior and solution properties of polyvinylalcohol as determined by viscometry and light scattering in DMSO, ethyleneglycol and water

Cited by 62 publications

References 9 publications

Electrostatic hierarchical co-assembly in aqueous solutions of two oppositely charged double hydrophilic diblock copolymers

Electrostatic hierarchical co-assembly in aqueous solutions of two oppositely charged double hydrophilic diblock copolymers

Water Soluble Polymers for Pharmaceutical Applications

S47 Study on Anaerobic Ammoniumoxidation (ANAMMOX) Sludge Immobilized in Different Gel Carriers and Its Nitrogen Removal Performance

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