Distribution of Surfactants in Latex Films:  A Rutherford Backscattering Study

Lee, Wai Peng; Gundabala, Venkata R.; Akpa, Belinda S.; Johns, Michael L.; Jeynes, C.; Routh, Alexander F.

doi:10.1021/la0601760

Cited by 25 publications

(29 citation statements)

References 28 publications

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“…[15,16,17,18] In waterborne PSAs, the distribution and migration of small molecules, especially surfactants, [7,9,19] has been correlated with poor waterborne adhesive performance and is of special interest. Greater understanding of surfactant distribution normal to the film surface has been obtained recently from modelling [20] Published in Journal of Colloids and Interface Science (2007) 307, 56-63 5 and experiment [21]. This present work is partly motivated by a need for information about surfactant distribution in waterborne PSAs, which will be correlated with studies of adhesion characteristics in future work.…”

Section: Introductionmentioning

confidence: 92%

Probing particle structure in waterborne pressure-sensitive adhesives with atomic force microscopy

Lei

Ouzineb²,

Dupont³

et al. 2007

Journal of Colloid and Interface Science

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Section: Introductionmentioning

confidence: 92%

Probing particle structure in waterborne pressure-sensitive adhesives with atomic force microscopy

Lei

Ouzineb²,

Dupont³

et al. 2007

Journal of Colloid and Interface Science

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“…The chain extender EG12 applied in these WPUs possess much stronger surface activity and permanent excellent antibacterial activity than the normal single-chain quaternary ammonium salts25262728. More importantly, such antibacterial surfactant can accumulate at polymer/air interface to form antibacterial brushes because of the high interfacial energy2930. Therefore, we demonstrate here novel contact-active antibacterial and antifouling surfaces constructed from these antibacterial GWPUs.…”

mentioning

confidence: 93%

A Novel Surface Structure Consisting of Contact-active Antibacterial Upper-layer and Antifouling Sub-layer Derived from Gemini Quaternary Ammonium Salt Polyurethanes

Zhang

et al. 2016

Sci Rep

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Contact-active antibacterial surfaces play a vital role in preventing bacterial contamination of artificial surfaces. In the past, numerous researches have been focused on antibacterial surfaces comprising of antifouling upper-layer and antibacterial sub-layer. In this work, we demonstrate a reversed surface structure which integrate antibacterial upper-layer and antifouling sub-layer. These surfaces are prepared by simply casting gemini quaternary ammonium salt waterborne polyurethanes (GWPU) and their blends. Due to the high interfacial energy of gemini quaternary ammonium salt (GQAS), chain segments containing GQAS can accumulate at polymer/air interface to form an antibacterial upper-layer spontaneously during the film formation. Meanwhile, the soft segments composed of polyethylene glycol (PEG) formed the antifouling sub-layer. Our findings indicate that the combination of antibacterial upper-layer and antifouling sub-layer endow these surfaces strong, long-lasting antifouling and contact-active antibacterial properties, with a more than 99.99% killing efficiency against both gram-positive and gram-negative bacteria attached to them.

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“…In the improved treatment that follows below, we show that a different and more physical diffusio-osmotic term emerges, that is usually neglected in practice. Eq (16) relates the variation of surfactant molecules concentration (first term) to the gradient of chemical potential (second term) and the advection of surfactant molecules adsorbed on latex beads (last term). The third term is a counterpart of the crossed diffusio-osmotic term discussed above.…”

mentioning

confidence: 99%

Simulation of Vertical Surfactant Distributions in Drying Latex Films

et al. 2017

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Following our previous contribution ( Gromer, A. et al. Langmuir 2015 , 31 , 10983 - 10994 ) presenting a new simulation tool devoted to particle distributions in drying latex films, this Article describes the prediction of surfactant concentration profiles in the vertical direction during the complete film formation process. The simulation is inspired by cellular automata and equations by Routh and co-workers. It includes effects that were not considered before: surfactant convection by water and surfactant desorption upon particle deformation. It is based on five parameters describing the nature of the polymer/surfactant system and on film formation conditions. In particular, the viscoelastic properties of the polymer were taken into account through the λ̅ parameter introduced by Routh and Russel. Results show the importance of convection by water and the influence of the particular deformation mechanism on the final surfactant distribution. Excesses or depletions can be predicted either on the surface or on the substrate sides, in qualitative agreement with the numerous existing experimental studies. The complex interplay between parameters governing surfactant distributions makes the results unpredictable without the help of such a simulation tool. Therefore, it should be of interest to both industrial and academic scientists.

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Distribution of Surfactants in Latex Films: A Rutherford Backscattering Study

Cited by 25 publications

References 28 publications

Probing particle structure in waterborne pressure-sensitive adhesives with atomic force microscopy

Probing particle structure in waterborne pressure-sensitive adhesives with atomic force microscopy

A Novel Surface Structure Consisting of Contact-active Antibacterial Upper-layer and Antifouling Sub-layer Derived from Gemini Quaternary Ammonium Salt Polyurethanes

Simulation of Vertical Surfactant Distributions in Drying Latex Films

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