Pdda Polyelectrolyte
Pdda Polyelectrolyte - Related Videos
12:27
Polyelectrolyte Complex for Heparin Binding Domain Osteogenic Growth Factor Delivery
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Cited by 2 •
2016
Self-assembled polyelectrolyte complexes (PEC) fabricated from heparin and protamine were deposited on alginate beads to entrap and regulate the release of osteogenic growth factors. This delivery strategy enables a 20-fold reduction of BMP-2 dose in spinal fusion applications. This article illustrates the benefits and fabrication of PECs.
08:44
Assembly and Characterization of Polyelectrolyte Complex Micelles
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Cited by 10 •
2020
We provide protocols and representative data for designing, assembling, and characterizing polyelectrolyte complex micelles, core-shell nanoparticles formed by polyelectrolytes and hydrophilic charged-uncharged block copolymers.
11:13
Composite Scaffolds of Interfacial Polyelectrolyte Fibers for Temporally Controlled Release of Biomolecules
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Cited by 3 •
2015
Scaffolds for tissue engineering need to recapitulate the complex biochemical and biophysical microenvironment of the cellular niche. Here, we show the use of interfacial polyelectrolyte complexation fibers as a platform to create composite, multi-component polymeric scaffolds with sustained biochemical release.
12:19
Multi-Scale Modification of Metallic Implants With Pore Gradients, Polyelectrolytes and Their Indirect Monitoring In vivo
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Cited by 4 •
2013
In this video, we will demonstrate modification techniques for porous metallic implants to improve their functionality and to control cell migration. Techniques include development of pore gradients to control cell movement in 3D and production of basement membrane mimics to control cell movement in 2-D. Also, a HPLC-based method for monitoring implant integration in-vivo via analysis of blood proteins is described.
11:26
Towards Biomimicking Wood: Fabricated Free-standing Films of Nanocellulose, Lignin, and a Synthetic Polycation
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Cited by 13 •
2014
The objective of this research was to form synthetic plant cell wall tissue using layer-by-layer assembly of nanocellulose fibrils and isolated lignin assembled from dilute aqueous suspensions. Surface measurement techniques of quartz crystal microbalance and atomic force microscopy were used to monitor the formation of the polymer-polymer nanocomposite material.
FAQs
Adsorption is governed by the attraction between PDDA’s positively charged quaternary ammonium groups and negatively charged molecules, particles, or surfaces. Charge density affects how strongly and extensively the polymer can interact at an interface, while the ionic environment influences those electrostatic interactions. Controlling these variables helps chemists regulate surface coverage, charge neutralization, and the properties of resulting coatings or complexes.
The polymer can accumulate at the interface through electrostatic attraction and partially or fully neutralize the negative charge. This changes interfacial behavior and may promote association into polyelectrolyte complexes or support multilayer formation. The resulting charge adjustment is important when designing colloidal systems, functional coatings, and composite materials with controlled surface properties.
PDDA changes how charged colloidal particles interact by binding to their negatively charged surfaces. Depending on the interfacial charge conditions and adsorption behavior, this interaction can help control whether particles remain dispersed or associate into larger aggregates. That dual usefulness allows chemists to apply the polymer in different colloid-management strategies rather than treating it as a single-purpose additive.
Layer-by-layer assembly uses the polymer’s charge to build films through sequential adsorption at an interface. PDDA can first associate with a negatively charged surface or material, after which oppositely charged components can be deposited to create additional layers. Repeating this charge-directed process provides a way to tailor film composition and interfacial functionality for coatings and sensing materials.
A typical strategy begins by selecting a negatively charged surface, particle, or molecule that can interact with the polymer. PDDA is then introduced in aqueous solution so adsorption and charge adjustment can occur, followed by formation of a complex, coating, or multilayer when appropriate. Monitoring the charge environment and adsorption behavior helps control the final interfacial properties.
PDDA supports research on sensing, separation, nanotechnology, colloid control, and functional materials. Its adsorption can modify interfaces, while charge-directed assembly can produce coatings or composite structures with designed properties. In chemistry, these capabilities make the polymer useful for investigating how molecular charge, ionic conditions, and interfacial interactions determine material performance.