Self-assembly of water insoluble polymers into Colloidal Unimolecular Polymer (CUP) particles of 3–9 nm

Riddles, Cynthia J.; Zhao, Wei; Hu, Hua-Jung; Chen, Minghang; Mark, Michael R. Van De

doi:10.1016/j.polymer.2013.11.014

Cited by 19 publications

(37 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The results were consistent with the size dependence of globular proteins on their molecular weight [30] and with our earlier report on the carboxylate-functional CUP particles [12]. Figure 5 shows the particle size distribution graphs for the three QUAT-CUPs.…”

Section: Rheological Behaviorsupporting

confidence: 91%

“…The viscosity of the solution was used instead of water to account for the change in diffusion coefficient of CUP particles due to the viscosity increase caused by the charged groups on the surface of CUP particles [12].…”

Section: Water Reductionmentioning

confidence: 99%

“…Van De Mark [12] et al have shown that for accurate particle size measurement of CUP particles using DLS, the viscosity of the solvent was replaced by the viscosity of the solution because of the increased viscosity due to electroviscous effects. The collective diffusion coefficient (D c ) was approximated from the generalized Stokes-Einstein's model for the diffusion of spherical particles expressed as Eq.…”

Section: Equilibrium Surface Tension Behaviormentioning

confidence: 99%

“…The collapse of individual polymer chains to form CUP particles is driven by the polymer-polymer interactions being greater than polymer-solvent interactions and entropically favored by the release of water on the surface of polymer chain. CUP particles with carboxylate groups on the surface and based on poly (methyl-methacrylate-comethacrylic acid) have been reported before [11,12]. Polymers with molecular weight (MW) in the range of 13,000 to 130,000 successfully formed CUP particles but polymers with MW less than 13,000 gave some aggregation due to an insufficient number of stabilizing groups [13].…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Synthesis and characterization of cationic colloidal unimolecular polymer (CUP) particles

2015

Self Cite

View full text Add to dashboard Cite

Cationic colloidal unimolecular polymer (CUP) particles were prepared by using a lower concentration of the quaternary ammonium functional copolymers during the process of water reduction. True nanoscale (diameter 3-9 nm), zero-volatile organic content (VOC), spheroidal CUP particles, and self-stabilized via electro-repulsion of surface cationic groups were obtained. The viscosity of the cationic CUP systems w as influenced by the electroviscous effects arising from the surface charge and the associated surface water layer. The density of surface water was 1.6 % greater than the bulk water density which was attributed to the structuring of water around charged quaternary ammonium groups. The equilibrium surface tension values decreased linearly with increasing concentration and surface charge density of CUP particles due to a greater reduction in surface energy. The rate of surface tension reduction determined by maximum bubble pressure method decreased with increasing concentration and the molecular weight of the CUP due to diffusion effects.

show abstract

Section: Rheological Behaviorsupporting

confidence: 91%

Section: Water Reductionmentioning

confidence: 99%

Section: Equilibrium Surface Tension Behaviormentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Synthesis and characterization of cationic colloidal unimolecular polymer (CUP) particles

2015

Self Cite

View full text Add to dashboard Cite

show abstract

“…CUP solutions are a two-phase colloidal system composed of solid spherical unimolecular polymer particles as the dispersed phase suspended in the continuous aqueous phase. CUPs are typically prepared from polymers containing hydrophilic groups such as carboxylic acid salts or sulfonic acid salts on a hydrophobic polymer backbone [10]. Polymers with molecular weights ranging from 13,000 to 130,000 have been successfully reduced to form CUPs.…”

Section: Introductionmentioning

confidence: 99%