Solvent effects on polymer surface structure

Chen, Jiaxing; Zhuang, Hengzhong; Zhao, Jiahao; Gardella, Joseph A.

doi:10.1002/sia.1097

Cited by 38 publications

(22 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Block copolymers have been intensively studied for their self‐assembly properties in the solid state or in solution 22. Because of the low surface energy and poor miscibility of PDMS with other polymers, PDMS blocks have a strong tendency to segregate onto the surface both when casting copolymers containing the PDMS block and when blending PDMS with other polymers 23. 24 Flat surfaces almost totally enriched by PDMS blocks are generally formed.…”

Section: Resultsmentioning

confidence: 99%

Highly Ordered Mesoporous Carbon as Catalyst for Oxidative Dehydrogenation of Ethylbenzene to Styrene

Delgado

Liu

et al. 2009

Chemistry An Asian Journal

View full text Add to dashboard Cite

We demonstrate that mesoporous carbon without deposition of metal particles is a highly active catalyst. It exhibits both high activity and selectivity in oxidative dehydrogenation of ethylbenzene to styrene, as well as long catalytic stability when compared with activated carbon. Both the as-prepared mesoporous carbon and the active coke formed during the initial stage of the reaction play an important role in the catalytic performance. XPS and IR techniques reveal that the surface oxygen functional groups formed during the reaction are the active sites for the reaction. The ordered mesoporous structure is beneficial for mass transport in catalytic reaction exhibiting long term stability in contrast to activated carbon.

show abstract

Section: Resultsmentioning

confidence: 99%

Highly Ordered Mesoporous Carbon as Catalyst for Oxidative Dehydrogenation of Ethylbenzene to Styrene

Delgado

Liu

et al. 2009

Chemistry An Asian Journal

View full text Add to dashboard Cite

show abstract

“…4 In addition, when polymer blends and block copolymers are exposed to solvent, preferential solvation has been shown to affect the chemical composition of the surface region. 5 Although in situ measurements of the interfacial configuration of polymers in the presence of liquids and solvents are being made, the polymer/liquid interface is less understood than the polymer/air interface. This paper explores the effects that absorption of toluene vapor into polystyrene have on the ordering of phenyl side branches at the polystyrene/toluene vapor interface by surface specific sum frequency generation (SFG) vibrational spectroscopy.…”

Section: Introductionmentioning

confidence: 99%

Solvent Vapor Induced Ordering and Disordering of Phenyl Side Branches at the Air/Polystyrene Interface Studied by SFG

and

Somorjai

2002

Langmuir

View full text Add to dashboard Cite

Sum frequency generation (SFG) vibrational spectroscopy has been used to characterize the effect that toluene solvent vapor has on the surface structure of polystyrene films. SFG spectra show that low surface tension toluene molecules preferentially coat the surfaces of polystyrene films that are exposed to a saturated toluene vapor environment. The SFG spectra indicate that phenyl side branches are well-ordered at the air/polystyrene interface prior to toluene exposure and that the phenyl branches become solvated and disordered when the polystyrene is exposed to toluene vapor. After exposure, as the toluene evaporates from the film, the partially solvated polystyrene surface rapidly reorders the phenyl side groups away from the surface.

show abstract

“…To highlight the importance of polymer blends in applications as biomaterials and enteric coatings, Chen et al, 40 reviewed some studies on solvent effects, showing that the properties of the solvent used in the casting solution, such as polarity, volatility, and specific interaction with the polymer blend material are critical for surface formation.…”

Section: Surface Tension Parametersmentioning

confidence: 99%

Biocidal activity of cellulose materials for medical implants

Onofrei¹,

Dobos²,

Dunca

et al. 2015

J of Applied Polymer Sci

View full text Add to dashboard Cite

Surface wettability trends, and blood component adhesion of some cellulose acetate phthalate/hydroxypropyl cellulose blend films are analyzed in view of adapting the system to biomedical applications. The results show that intermediate blend compositions of the corresponding films influence the surface tension parameters-controlled by the interactions occurring in the system. Increasing hydrophobicity and, implicitly, decreasing the polar surface tension components, are correlated with the adhesion/cohesion of blood components and plasma proteins. Thus, the work of spreading proteins on the hydrophobic blend surfaces indicated that albumin is not absorbed preferentially, while fibrinogen is characterized by a higher degree of adhesion on the surfaces, and also that selective adsorption of plasma proteins modifies blood compatibility. In addition, the obtained results and the ascertained antimicrobial activity of the studied blends contribute to the development of new applications in the biomedical field.

show abstract

Solvent effects on polymer surface structure

Cited by 38 publications

References 39 publications

Highly Ordered Mesoporous Carbon as Catalyst for Oxidative Dehydrogenation of Ethylbenzene to Styrene

Highly Ordered Mesoporous Carbon as Catalyst for Oxidative Dehydrogenation of Ethylbenzene to Styrene

Solvent Vapor Induced Ordering and Disordering of Phenyl Side Branches at the Air/Polystyrene Interface Studied by SFG

Biocidal activity of cellulose materials for medical implants

Contact Info

Product

Resources

About