Porous structures of polymer films prepared by spin coating with mixed solvents under humid condition

Langmuir : the ACS Journal of Surfaces and Colloids
Min Soo ParkJin Kon Kim

Abstract

We investigate the effects of interfacial energy between water and solvent as well as polymer concentration on the formation of porous structures of polymer films prepared by spin coating of cellulose acetate butyrate (CAB) in mixed solvent of tetrahydrofuran (THF) and chloroform under humid condition. The interfacial energy between water and the solvent was gradually changed by the addition of chloroform to the solvent. At a high polymer concentration (0.15 g/cm3 in THF), porous structures were limited only at the top surfaces of CAB films, regardless of interfacial energies, due to the high viscosity of the solution. At a medium concentration (approximately 0.08 g/cm3 in THF), CAB film had relatively uniform pores at the top surface and very small pores inside the film because of the mixing of the water droplets with THF solution. When chloroform was added to THF, pores at the inner CAB film had a comparable size with those at the top surface because of the reduced degree of the mixing between the water droplets and the mixed solvent. A further decrease in polymer concentration (0.05 g/cm3 in THF) caused the final films to have a two-layer porous structure, and the size of pores at each layer was almost the same.

References

May 13, 1996·Physical Review Letters·A V LimayeS B Ogale
May 29, 2003·Angewandte Chemie·Teruaki Hayakawa, Shin Horiuchi
Apr 6, 2005·Langmuir : the ACS Journal of Surfaces and Colloids·A BolognesiA Turturro

❮ Previous
Next ❯

Citations

Jun 15, 2011·Langmuir : the ACS Journal of Surfaces and Colloids·Renhao DongJingcheng Hao
Mar 5, 2014·Chemical Communications : Chem Comm·Ling-Shu WanZhi-Kang Xu
Sep 8, 2015·Membranes·Yingying DouLingling Shui
Jul 31, 2007·Journal of Colloid and Interface Science·F PilatiD Pospiech
May 15, 2008·Journal of Biomedical Materials Research. Part a·Costantino Del GaudioMauro Grigioni
May 14, 2011·Chemistry : a European Journal·Renhao DongJingcheng Hao
Jan 24, 2017·ACS Applied Materials & Interfaces·Susanta BeraSunirmal Jana
Dec 12, 2018·Future Medicinal Chemistry·Susanna SampaolesiLaura Russo
Aug 16, 2017·Scientific Reports·Nazia NoorVolker Abetz
Jun 12, 2008·The Journal of Physical Chemistry. B·Bo YouDongyuan Zhao
Apr 29, 2009·Langmuir : the ACS Journal of Surfaces and Colloids·Alexandra Muñoz-BonillaJuan Rodriguez-Hernandez
Aug 19, 2007·Langmuir : the ACS Journal of Surfaces and Colloids·Eero KontturiJanne Laine
Feb 20, 2019·Langmuir : the ACS Journal of Surfaces and Colloids·Dowan KimKookheon Char
Dec 8, 2006·The Journal of Physical Chemistry. B·Hang SunLixin Wu

❮ Previous
Next ❯

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.

Related Papers

Langmuir : the ACS Journal of Surfaces and Colloids
Min Soo Park, Jin Kon Kim
Langmuir : the ACS Journal of Surfaces and Colloids
Wojciech MadejJakub Rysz
Langmuir : the ACS Journal of Surfaces and Colloids
Min Soo Park, Jin Kon Kim
Physical Review Letters
D Beysens, C M Knobler
© 2022 Meta ULC. All rights reserved