Controlling the asymmetry of densified and porous hybrid coatings based on vapor sublimation and deposition

Wu, Tai‐Hsi; Lin, Tzu-Hung; Chen, Hsien‐Yeh

doi:10.1016/j.mtadv.2022.100292

Cited by 2 publications

(2 citation statements)

References 51 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…22,23 With fine control of thermodynamic conditions, the deposited polymer on such an iced template would result in a porous and 3D polymer structure instead of a conventional dense thin film, as shown in previous work. 23 We therefore hypothesize that the controlling of morphology and roughness of the ice templates can result in the controls of the constructed structures with thereafter deposited polymers based on the described vapor sublimation and deposition process and are applicable on a variety substrate materials with complex geometries. Also, to prevent the formation of porous structures that would affect the morphology of constructed structures, we suppose that the manipulation of the ratio of the deposition rate to the sublimation rate during the fabrication process can result in the non-porous structure of deposited polymers.…”

Section: ■ Results and Discussionmentioning

confidence: 75%

“…In contrast, the vaporized quinodimethane monomers favor deposition and polymerization at the same thermodynamic conditions, thus forming solid-phase polymers of poly( p -xylylenes) on the substrates . The two processes, namely, the sublimation of ice and the deposition of poly( p -xylylene), occur contentiously and simultaneously while competing with mass transfer flow and complimenting each other with the same volume space. , With fine control of thermodynamic conditions, the deposited polymer on such an iced template would result in a porous and 3D polymer structure instead of a conventional dense thin film, as shown in previous work . We therefore hypothesize that the controlling of morphology and roughness of the ice templates can result in the controls of the constructed structures with thereafter deposited polymers based on the described vapor sublimation and deposition process and are applicable on a variety substrate materials with complex geometries.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Controlling Superhydrophobicity on Complex Substrates Based on a Vapor-Phase Sublimation and Deposition Polymerization

Chang,

Wang,

Chen

2023

ACS Appl. Mater. Interfaces

Self Cite

View full text Add to dashboard Cite

The superhydrophobic properties of material surfaces have attracted significant research and practical development in a wide range of applications. In the present study, a superhydrophobic coating was fabricated using a vapor-phase sublimation and deposition process. This process offers several advantages, including a controllable and tunable superhydrophobic property, a dry and solvent-free process that uses well-defined water/ice templates during fabrication, and a coating technology that is applicable to various substrates, regardless of their dimensions or complex geometric configurations. The fabrication process exploits time-dependent condensation to produce ice templates with a controlled surface morphology and roughness. The templates are sacrificed via vapor sublimation, which results in mass transfer of water vapor out of the system. A second vapor source of a polymer precursor is then introduced to the system, and deposition occurs upon polymerization on the iced templates, replicating the same topologies from the iced templates. The continuation of the co-current sublimation and deposition processes finally renders permanent hierarchical structures of the polymer coatings that combine the native hydrophobic property of the polymer and the structured property by the sacrificed ice templates, achieving a level of superhydrophobicity that is tunable from 90° to 164°. The experiments demonstrated the use of [2,2]paracyclophanes as the starting materials for forming the superhydrophobic coatings of poly(p-xylylenes) on substrate surfaces. In comparison to conventional vapor deposition of poly(p-xylylenes), which resulted in dense thin-film coatings with only a moderate water contact angle of approximately 90°, the reported superhydrophobic coatings and fabrication process can achieve a high water contact angle of 164°. Demonstrations furthermore revealed that the proposed coatings are durable while maintaining superhydrophobicity on various substrates, including an intraocular lens and a cardiovascular stent, even against harsh treatment conditions and varied solution compositions used on the substrates.

show abstract

Section: ■ Results and Discussionmentioning

confidence: 75%

Section: Resultsmentioning

confidence: 99%

Controlling Superhydrophobicity on Complex Substrates Based on a Vapor-Phase Sublimation and Deposition Polymerization

Chang,

Wang,

Chen

2023

ACS Appl. Mater. Interfaces

Self Cite

View full text Add to dashboard Cite

show abstract

Vapor-Deposited Polymer Films and Structure: Methods and Applications

et al. 2023

Self Cite

View full text Add to dashboard Cite

Vapor deposition of polymers is known to result in densified thin films, and recent developments have advanced these polymers with interesting fabrication techniques to a variety of controlled structures other than thin films. With the advantages of chemical modification and functionalization of these polymers, advancements have combined both the physical and chemical properties of these vapor-deposited polymers to obtain controlled anisotropic polymers, including layer-by-layer, gradient, hierarchical, porosity, and the combination of the above, meaning that the produced polymers are functional and are addressed in devised physical configurations and chemical compositions. The main purpose of using polymer coatings as a tool for surface modification is to provide additional properties that decouple the natural properties of the underlying materials (including metals, polymers, oxides/ceramics, glass, silicon, etc.), and recent advancements have rendered novel insights into combined physical and chemical properties to fulfill the increasing needs of sophisticated requirements of materials for users. The review herein intends to deliver messages of recent progress of the advancements of vapor-deposited polymers, with discussions of the variations of the physical structures and chemical functionalities, and how these two aspects are integrated with novel fabrication techniques.

show abstract

Controlling the asymmetry of densified and porous hybrid coatings based on vapor sublimation and deposition

Cited by 2 publications

References 51 publications

Controlling Superhydrophobicity on Complex Substrates Based on a Vapor-Phase Sublimation and Deposition Polymerization

Controlling Superhydrophobicity on Complex Substrates Based on a Vapor-Phase Sublimation and Deposition Polymerization

Vapor-Deposited Polymer Films and Structure: Methods and Applications

Contact Info

Product

Resources

About