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Showing 1 to 12 of 12 for “"Polyallylamine"”.
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Effect of combined nanoparticle and polymeric dispersions on critical heat flux, nucleate boiling heat transfer coefficient, and coating adhesion
… using 1.0% alumina, 0.1% alumina, 500ppm polyallylamine hydrochloride (PAH), and 0.1% alumina combined with 500ppm PAH dispersions were determined using the pool-boiling method. The adhesion of 0.1% alumina and combined 0.1% alumina and 500ppm PAH coatings was evaluated using the tape and …
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Chemistry directed assembly of multilayered polymer thin films and colloidal particles
… at the moderate pH level of 4.8; in contrast, polyallylamine hydrochloride (PAH) based multilayers are attracted to the EG surface under certain pH conditions, with maximal selectivity on EG also at a pH of 4.8. Chemical force microscopy was used to directly examine the intermolecular …
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Assembly and post-assembly manipulation of polyelectrolyte multilayers for control of bacterial attachment and viability
… PEMs of identical chemical composition (polyallylamine hydrochloride (PAH) and polyacrylic acid (PAA)) with distinct mechanical moduli (1-100 MPa). Once characterized, these PEMs showed that, under certain conditions, bacterial attachment correlated with increasing modulus. Thus, …
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Novel polyelectrolyte complexes for oral insulin delivery.
… electrostatic interactions between insulin and Polyallylamine-based polymers at pH 7.4 have been adapted to facilitate oral insulin delivery. Polyallylamine (15kDa) was quaternised by methylation of its primary amines using methyl iodide, to yield quaternised Paa (QPaa). The average level of …
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Comparison of Silica Polyamine Composites and Crosslinked Polystyrene Resins
… Cu2+, but only in the case of the linear polymer polyallylamine (PAA). In the case of the branched polymer polyethyleneimine (PEI), no such change in selectivity was observed. While these results are not well understood at this time, this allows the Rosenberg group and Purity Systems Inc. another …
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Comparison of Silica Polyamine Composites and Crosslinked Polystyrene Resins
… Cu2+, but only in the case of the linear polymer polyallylamine (PAA). In the case of the branched polymer polyethyleneimine (PEI), no such change in selectivity was observed. While these results are not well understood at this time, this allows the Rosenberg group and Purity Systems Inc. another …
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Antibacterial calcite created with a multilayer polyelectrolyte coating method
… particle will dissolve very slowly over time. Polyallylamine-g-perfluorophenylazide (PAAm-PFPA) is the first polymer layer which allows the attachment of a variety of polyelectrolytes due to covalent bonding by nitrene insertion reactions when exposed to UV light. The adsorbed mass of …
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Applications of Layer-by-Layer Films in Electrochromic Devices and Bending Actuators
… actuator fabricated with 100 bilayers of polyallylamine hydrochloride (PAH)/Au NPs exhibits high strain value of 6.8% with an actuation speed of 0.18 seconds for a 26 µm thick IPMC with 0.4 µm thick LbL CNCs under 4 volts.
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A Nacreous Self-Assembled Nanolaminate for Corrosion Resistance on 2024-Al Alloy
… deposited films of polyarylic acid (PAA) and polyallylamine hydrochloride (PAH) may offer some corrosion resistance on 2024-T3 Al alloys, but these films' corrosion resistance is severely hampered by the presence of Cl- in the PAH solution. Funding from this project was gratefully received …
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Engineering electroresponsive layer-by-layer thin films
… second model system explored, films comprising polyallylamine hydrochloride (PAH) and sulfonated polystyrene (SPS) were found to undergo reversible and dramatic swelling/deswelling transitions on the order of roughly 300 vol% and mechanical transitions on the order of 600-800% (shear modulus …
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Design, development, and evaluation of novel polymer-drug conjugates and interpolymer complexes for the treatment of neurodegenerative disease.
… Vanillin, an antioxidant, was conjugated to polyallylamine hydrochloride (NM10 and NM15), while the cholinesterase inhibitor naphthalimidohexylamine (HEXNAP) was conjugated to polyacrylic acid (N5 and N10). These conjugates were thoroughly characterised, and their antioxidant and …
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The use of novel poly(allylamine) based amphiphilic polymers for drug delivery.
… polymers for hydrophobic drug delivery. Polyallylamine (PAA) was grafted with four different types of hydrophobic pendant groups (Cholesteryl (Ch), (Fmoc), (Dansyl)and (Naphth)). Some amphiphilic polymers were further reacted with methyl orange to form quaternary ammonium moieties. The …