Effect of Surface Chemistry on the Glass-Transition Dynamics of Poly(phenyl methyl siloxane) Confined in Alumina Nanopores

Langmuir : the ACS Journal of Surfaces and Colloids
Roksana WinklerKarolina Adrjanowicz

Abstract

Broadband dielectric spectroscopy (BDS) and differential scanning calorimetry (DSC) are combined to study the effect of changes in the surface chemistry on the segmental dynamics of glass-forming polymer, poly(methylphenylsiloxane) (PMPS), confined in anodized aluminum oxide (AAO) nanopores. Measurements were carried for native and silanized nanopores of the same pore sizes. Nanopore surfaces are modified with the use of two silanizing agents, chlorotrimethylsilane (ClTMS) and (3-aminopropyl)trimethoxysilane (APTMOS), of much different properties. The results of the dielectric studies have demonstrated that for the studied polymer located in 55 nm pores, changes in the surface chemistry and thermal treatment allows the confinement effect seen in temperature evolution of the segmental relaxation time, τα(T) to be removed. The bulk-like evolution of the segmental relaxation time can also be restored upon long-time annealing. Interestingly, the time scale of such equilibration process was found to be independent of the surface conditions. The calorimetric measurements reveal the presence of two glass-transition events in DSC thermograms of all considered systems, implying that the changes in the interfacial interactions introduced...Continue Reading

References

Nov 1, 1996·Physical Review. E, Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics·M ArndtF Kremer
Dec 18, 1995·Physical Review Letters·R StannariusM Arndt
Oct 4, 2003·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·M PaluchC M Roland
Mar 10, 2004·The European Physical Journal. E, Soft Matter·C Alba-SimionescoY Xia
Jul 27, 2006·Journal of the American Chemical Society·Jinhan ChoFrank Caruso
Feb 16, 2007·Nature·Hagen KlaukMarcus Halik
Feb 2, 2008·Science·Z Fakhraai, J A Forrest
Mar 18, 2010·Nano Letters·Mari-Cruz García-GutiérrezRichard J Davies
Jun 10, 2010·Nano Letters·Antonis GitsasWolfgang Knoll
Sep 9, 2010·Physical Chemistry Chemical Physics : PCCP·Ciprian IacobFriedrich Kremer
Nov 26, 2010·Annual Review of Physical Chemistry·R Richert
Dec 15, 2010·Lab on a Chip·Vijaya SunkaraYoon-Kyoung Cho
Nov 11, 2011·The Journal of Chemical Physics·Catalin GainaruRoland Böhmer
Sep 26, 2012·Physical Review Letters·O BäumchenK Dalnoki-Veress
Dec 3, 2014·Nanomedicine : Nanotechnology, Biology, and Medicine·Ying WangSiling Wang
Mar 17, 2015·Nature Materials·Srabanti GhoshHynd Remita
Nov 14, 2015·Physical Review Letters·H B YuR Richert
Jan 2, 2016·The Journal of Physical Chemistry Letters·Wycliffe K KipnusuFriedrich Kremer
Jan 15, 2016·Physical Review Letters·K AdrjanowiczM Paluch
Jan 18, 2017·The Journal of Physical Chemistry Letters·Karolina AdrjanowiczMarian Paluch
Jan 31, 2017·Reports on Progress in Physics·Simone NapolitanoNicholas B Tito
Jun 3, 2017·The Journal of Chemical Physics·Wycliffe K KipnusuFriedrich Kremer
Sep 28, 2017·Physical Review Letters·Anna Panagopoulou, Simone Napolitano
Feb 27, 2018·Physical Review Letters·Kathrin SentkerPatrick Huber
Oct 13, 2018·Physical Review Letters·Xavier Monnier, Daniele Cangialosi

❮ Previous
Next ❯

Citations


❮ Previous
Next ❯

Methods Mentioned

BETA
differential scanning calorimetry
dielectric spectroscopy
thermal treatment
chemical treatment
X-ray

Software Mentioned

Quatro

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.