Micro- and nano-porous surface patterns prepared by surface-confined directional melt crystallization of solvent

Kim, Byoung Soo; Kim, Hyun Jin; An, Suyeong; Chi, Sangwon; Kim, Junseok; Lee, Jonghwi

doi:10.1016/j.jcrysgro.2016.08.065

Cited by 5 publications

(8 citation statements)

References 41 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…If a solvent is allowed to come into contact with a polymer surface at a temperature lower than the crystallization temperature of the solvent, limited dissolution of the polymer surface occurs, followed by DMC . By controlling the temperature and its gradient, the pore morphology could be controlled.…”

Section: Mechanical Properties Of Pc and Its Surfacesmentioning

confidence: 99%

“…By controlling the temperature and its gradient, the pore morphology could be controlled. The pore depth was controlled from a few microns to 400 µm by changing the initial temperature of the solvent or the contact time of the solvent, whose temperature profiles during the treatment were investigated in detail . Superior adhesion strength was also reported using the prepared porous surfaces, e.g., 7.3‐fold increases in adhesion compared to the plasma treated surfaces .…”

Section: Mechanical Properties Of Pc and Its Surfacesmentioning

confidence: 99%

“…To confirm this hypothesis, we chose three different materials for the dispersion: hydrophilic inorganic nanoparticles (silica), relatively hydrophobic nanoparticles (AlN), and hydrophobic organic particles (poly(dimethylsiloxane); PDMS). Only one polymer, polycarbonate (PC), was investigated here because the basic method of limited dissolution and surface melt crystallization has already been shown to be suitable for various polymers . PC, polyurethane, polyvinyl alcohol, and polystyrene were successfully treated using 1,4‐dioxane and water using temperature gradient generated by liquid nitrogen.…”

Section: Mechanical Properties Of Pc and Its Surfacesmentioning

confidence: 99%

“…The cross‐sectional image in Figure S1b, Supporting Information shows that the porous surface had a depth of ca. 150 µm, which can be controlled by manipulating the treatment time and temperature …”

Section: Mechanical Properties Of Pc and Its Surfacesmentioning

confidence: 99%

See 3 more Smart Citations

In Situ Incorporation of Pores and Nanoparticles into Polymer Surfaces Using Melt Crystallization

Chi

Lee

2019

Macromol. Rapid Commun.

Self Cite

View full text Add to dashboard Cite

Engineering the surface properties of a material without affecting its bulk properties is desirable for many applications, but it is often not readily achievable because it requires a complex series of processing steps. This study presents for the first time a simple and straightforward method that can convert regular flat polymer surfaces into various porous composite surfaces. The controlled dissolution of the polymer surface by a dispersion and subsequent melt crystallization allows for the successful embedding of dispersed inorganic or organic particles in the pore walls. The porous surface morphology is not significantly affected by the type of dispersed particle, but the contact and sliding angles and surface wettability are. Both superhydrophobic and oil/water separation surfaces can be conveniently fabricated from flat polymer surfaces. This novel and versatile technique could provide engineering freedom for the future development of various functional materials.

show abstract

Section: Mechanical Properties Of Pc and Its Surfacesmentioning

confidence: 99%

Section: Mechanical Properties Of Pc and Its Surfacesmentioning

confidence: 99%

Section: Mechanical Properties Of Pc and Its Surfacesmentioning

confidence: 99%

Section: Mechanical Properties Of Pc and Its Surfacesmentioning

confidence: 99%

See 2 more Smart Citations

In Situ Incorporation of Pores and Nanoparticles into Polymer Surfaces Using Melt Crystallization

Chi

Lee

2019

Macromol. Rapid Commun.

Self Cite

View full text Add to dashboard Cite

show abstract

“…Porous surfaces were prepared by surface‐confined dissolution using a solvent (for a limited time) and subsequent directional crystallization of the solvent, as described in a previous paper ( Figure ) . In the “precooling” methods ( Table 1 ), the polymer films were first placed on a liquid nitrogen reservoir, and solvent was poured onto the surfaces when the temperature of the polymer surface reached a predetermined value.…”

Section: Physical Properties Of Porous Surfaces and Their Sandwich Spmentioning

confidence: 99%

Enhanced Adhesion of Polydimethylsiloxane Using an Interlocked Finger Structure

Kim

Chi

et al. 2018

Macromol. Rapid Commun.

Self Cite

View full text Add to dashboard Cite

Silicone-based polymers have been widely used for many applications, but their extremely low surface energies and the resulting poor adhesion have been the cause for continuous problems. Herein, a novel adhesion improvement technique using an interlocked finger structure is demonstrated, which enables up to 24.8 and 7.3-fold increases in adhesion compared to the untreated and conventional plasma-treated cases, respectively. The interlocked finger structure is fabricated by surface-confined dissolution and subsequent directional melt crystallization of a solvent. After removing the solvent crystals, porous surfaces are prepared from polyurethane, polyvinyl alcohol, and polystyrene, and these are used to fabricate interfaces of interlocked finger structures with polydimethylsiloxane. The improvement in adhesion strength linearly depends on the pore depth of the prepared surfaces. This novel technique of surface adhesion could improve the performance of polymers with intrinsically poor adhesion in future applications.

show abstract

Temperature‐responsive smart surfaces via rise‐and‐descent transition: Attachability, durability, and fast sweating

Cho

Lee

2022

Journal of Polymer Science

Self Cite

View full text Add to dashboard Cite

Smart surfaces containing thermo-responsive hydrogels have been investigated for several decades, but the development of mechanically durable and versatile surfaces that can undergo distinct property changes remains a challenging task. Herein, we prepare smart surfaces showing reversible changes in micro-scale roughness, which are attachable to various polymeric substrates. The hydrogel microphase located between silicone phases responsively rise and descend (volcanic-terrain-mimetic transition); as a result, the surface properties reversibly swing from those of the hydrophobic silicone-like ones to those of the wet hydrogel ones. The durability of these surfaces resembles that of silicone, while their fast water release characteristics allow the utilization of the studied materials in self-aligning and artificial sweating applications. The release of the drug molecules loaded into the hydrogel phase is controlled by varying the temperature and composite structure. Thus, the fabricated versatile surfaces utilizing the volume transition of thermo-responsive hydrogels can meet the requirements of various future applications.

show abstract

Micro- and nano-porous surface patterns prepared by surface-confined directional melt crystallization of solvent

Cited by 5 publications

References 41 publications

In Situ Incorporation of Pores and Nanoparticles into Polymer Surfaces Using Melt Crystallization

In Situ Incorporation of Pores and Nanoparticles into Polymer Surfaces Using Melt Crystallization

Enhanced Adhesion of Polydimethylsiloxane Using an Interlocked Finger Structure

Temperature‐responsive smart surfaces via rise‐and‐descent transition: Attachability, durability, and fast sweating

Contact Info

Product

Resources

About