Study of the interaction of poly-N,N′-dimethylamino-ethyl methacrylate with polysilicic acid sols

Yermakova, A.N.; Nuss, P. V.; Kasaikin, V.A.; Зезин, А. Б.; Kabanov, V.A.

doi:10.1016/0032-3950(83)90271-x

Cited by 7 publications

(7 citation statements)

References 5 publications

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“…The weakened interaction between a polymeric amine and silica sol at pH 9 comparing with pH 7 had been described earlier. 31 Thus, the PVAÀsilica complex at pH 10 contains long PVA loops and tails. In the case of long-chain molecules, the macromolecular chain length is enough for complexing with a silica particle (or several particles), as shown in Figure 10B.…”

Section: ' Results and Discussionmentioning

confidence: 99%

Poly(vinyl amine)–Silica Composite Nanoparticles: Models of the Silicic Acid Cytoplasmic Pool and as a Silica Precursor for Composite Materials Formation

et al. 2011

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The role of polymer (poly(vinylamine)) size (238-11000 units) on silicic acid condensation to yield soluble nanoparticles or composite precipitates has been explored by a combination of light scattering (static and dynamic), laser ablation combined with aerosol spectrometry, IR spectroscopy, and electron microscopy. Soluble nanoparticles or composite precipitates are formed according to the degree of polymerization of the organic polymer and pH. Nanoparticles prepared in the presence of the highest molecular weight polymers have core-shell like structures with dense silica cores. Composite particles formed in the presence of polymers with extent of polymerization below 1000 consist of associates of several polymer-silica nanoparticles. The mechanism of stabilization of the "soluble" silica particles in the tens of nanometer size range involves cooperative interactions with the polymer chains which varies according to chain length and pH. An example of the use of such polymer-poly(silicic acid) nanoparticles in the generation of composite polymeric materials is presented. The results obtained have relevance to the biomimetic design of new composite materials based on silica and polymers and to increasing our understanding of how silica may be manipulated (stored) in the biological environment prior to the formation of stable mineralized structures. We suspect that a similar method of storing silicic acid in an active state is used in silicifying organisms, at least in diatom algae.

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Section: ' Results and Discussionmentioning

confidence: 99%

Poly(vinyl amine)–Silica Composite Nanoparticles: Models of the Silicic Acid Cytoplasmic Pool and as a Silica Precursor for Composite Materials Formation

et al. 2011

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“…In general, both cases may occur in multicomponent polymer systems revealing a co-operative type of binding. [25,33,34] It should be emphasised that, at high magnitudes of reduced protein concentrations, free STI could not be detected in the system. This result implies that the denaturation parameters measured in the calorimetric experiments could be attributed to the protein bound to the polysaccharide.…”

Section: Resultsmentioning

confidence: 99%

Effect of polysaccharides on the stability and renaturation of soybean trypsin (Kunitz) inhibitor

et al. 2002

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“…Non-stoichiometric complexes between polymeric cations and silica nanoparticles have been described previously. 24,25 Such soluble complexes can also exist with high MM PVI fractions. Complexing of primary silica particles with PVI chains may in turn prevent further silica growth.…”

Section: Interactions Of Pvi Samples With Silicic Acid Speciesmentioning

confidence: 99%

Controlled stabilisation of silicic acid below pH 9 using poly(1-vinylimidazole)

et al. 2008

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We show, for the first time, inhibition of silicic acid condensation over a wide range of pH, especially below 9 using certain molecular mass fractions of poly(1-vinylimidazole) (PVI). This is achieved by stabilisation of molybdate-active Si species, which are crucial to condensation and growth to form silica. The structure of the resulting composites depends on the molecular mass of the PVI chains. Long-chain macromolecules can ''encapsulate'' Si species giving rise to stable soluble complexes. Short PVI chains stimulate association of silica particles and at neutral pH precipitation occurs. Protonation of imidazole units in acidic pH results in dissolution of the precipitates. We believe that the results presented herein using PVI as a model system will help elucidate the mechanisms underpinning the molecular interactions between (bio)macromolecules and inorganic materials.

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Study of the interaction of poly-N,N′-dimethylamino-ethyl methacrylate with polysilicic acid sols

Cited by 7 publications

References 5 publications

Poly(vinyl amine)–Silica Composite Nanoparticles: Models of the Silicic Acid Cytoplasmic Pool and as a Silica Precursor for Composite Materials Formation

Poly(vinyl amine)–Silica Composite Nanoparticles: Models of the Silicic Acid Cytoplasmic Pool and as a Silica Precursor for Composite Materials Formation

Effect of polysaccharides on the stability and renaturation of soybean trypsin (Kunitz) inhibitor

Controlled stabilisation of silicic acid below pH 9 using poly(1-vinylimidazole)

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