Tuning the surface hydrophobicity of honeycomb porous films fabricated by star-shaped POSS-fluorinated acrylates polymer via breath-figure-templated self-assembly

2016 ◽  
Vol 96 ◽  
pp. 1-9 ◽  
Author(s):  
Qing Hong ◽  
Xiaoyan Ma ◽  
Zhiguang Li ◽  
Fang Chen ◽  
Qilu Zhang
Keyword(s):  
Self Assembly ◽  
Surface Hydrophobicity ◽  
Porous Films ◽  
Breath Figure ◽  
Fluorinated Acrylates

scholarly journals Breath figure templated self-assembly of surface-acylated cellulose nanowhiskers confined as honeycomb films

2021 ◽  
Author(s):  
Huan Liu ◽  
Bo Pang ◽  
Kai Zhang
Keyword(s):  
Relative Humidity ◽  
Self Assembly ◽  
Three Dimensional ◽  
Planar Geometry ◽  
Cellulose Nanowhiskers ◽  
Water Droplets ◽  
Porous Films ◽  
Structural Colors ◽  
Breath Figure ◽  
High Concentrations

Abstract The self-assembly of cellulose nanowhiskers (CNWs) in confined geometries provides a powerful method for the fabrication of novel structures. Herein, ordered honeycomb microporous films were first prepared with surface-acylated CNWs (CNWs-SU) through the breath figure method. Resulting films showed highly porous order over large regions and the iridescent color was only displayed by their rims, which is different from traditional dish-cast CNW films showing the iridescent color over the whole area. This is mainly due to the condensation of water droplets forming three-dimensional (3D) geometry, which forced CNWs-SU to self-assemble into cholesteric architectures in confined geometry and resulted in the iridescent color of the rims after drying. The mechanism was further studied by investigating the critical influencing factors, primarily the concentration of CNW-SU suspensions, the relative humidity of the atmosphere and the surface-attached moieties. In particular, CNW-SU suspensions with a concentration of 3 mg/mL at the relative humidity of 75% preferentially formed honeycomb films with uniform pores. Too low or too high concentrations of CNW-SU suspensions or relative humidity are not preferable for uniform porous films. CNWs-SU with further immobilized octadecane or fluoroalkyl groups on their surface strongly affected the formation of uniform porous films because of higher hydrophobicity and accompanying inhomogeneous condensation of water droplets. This work provides a novel method to study the interactions of CNWs beyond the planar geometry and the formation of uniform porous films solely with CNWs with structural colors for diverse potential applications.

scholarly journals Breath figure templated self-assembly of surface-acylated cellulose nanowhiskers confined as honeycomb films

Cellulose ◽  
2021 ◽  
Author(s):  
Huan Liu ◽  
Bo Pang ◽  
Kai Zhang
Keyword(s):  
Relative Humidity ◽  
Self Assembly ◽  
Three Dimensional ◽  
Planar Geometry ◽  
Cellulose Nanowhiskers ◽  
Water Droplets ◽  
Porous Films ◽  
Structural Colors ◽  
Breath Figure ◽  
High Concentrations

AbstractThe self-assembly of cellulose nanowhiskers (CNWs) in confined geometries provides a powerful method for the fabrication of novel structures. Herein, ordered honeycomb microporous films were first prepared with surface-acylated CNWs (CNWs-SU) through the breath figure method. Resulting films showed highly porous order over large regions and the iridescent color was only displayed by their rims, which is different from traditional dish-cast CNW films showing the iridescent color over the whole area. This is mainly due to the condensation of water droplets forming three-dimensional (3D) geometry, which forced CNWs-SU to self-assemble into cholesteric architectures in confined geometry and resulted in the iridescent color of the rims after drying. The mechanism was further studied by investigating the critical influencing factors, primarily the concentration of CNW-SU suspensions, the relative humidity of the atmosphere and the surface-attached moieties. In particular, CNW-SU suspensions with a concentration of 3 mg/mL at the relative humidity of 75% preferentially formed honeycomb films with uniform pores. Too low or too high concentrations of CNW-SU suspensions or relative humidity are not preferable for uniform porous films. CNWs-SU with further immobilized octadecane or fluoroalkyl groups on their surface strongly affected the formation of uniform porous films because of higher hydrophobicity and accompanying inhomogeneous condensation of water droplets. This work provides a novel method to study the interactions of CNWs beyond the planar geometry and the formation of uniform porous films solely with CNWs with structural colors open up interesting possibilities for broad application in photonic nanomaterials. Graphic abstract

Self-Assembly of Patterned Porous Films from Cyclic Polystyrenes via the Breath Figure Method

2018 ◽  
Vol 122 (7) ◽  
pp. 3926-3933 ◽  
Author(s):  
Bai-Heng Wu ◽  
Lian-Wei Wu ◽  
Kang Gao ◽  
Sen-He Chen ◽  
Zhi-Kang Xu ◽  
...  
Keyword(s):  
Self Assembly ◽  
Porous Films ◽  
Breath Figure ◽  
Breath Figure Method

Reactive Nanopattern in a Triple Structured Bio-Inspired Honeycomb Film as a Clickable Platform

2018 ◽  
Author(s):  
Pierre Marcasuzaa ◽  
Samuel Pearson ◽  
Karell Bosson ◽  
Laurence Pessoni ◽  
Jean-Charles Dupin ◽  
...  
Keyword(s):  
Self Assembly ◽  
Double Porosity ◽  
Surface Groups ◽  
Specific Chemical ◽  
Site Specific ◽  
Surface Functionality ◽  
Wenzel State ◽  
Breath Figure ◽  
Responsive Surfaces ◽  
Secondary Population

A hierarchically structured platform was obtained from spontaneous self-assembly of a poly(styrene)-<i>b</i>-poly(vinylbenzylchloride) (PS-<i>b</i>-PVBC) block copolymer (BCP) during breath figure (BF) templating. The BF process using a water/ethanol atmosphere gave a unique double porosity in which hexagonally arranged micron-sized pores were encircled by a secondary population of smaller, nano-sized pores. A third level of structuration was simultaneously introduced between the pores by directed BCP self-assembly to form out-of-the-plane nano-cylinders, offering very rapid bottom-up access to a film with unprecedented triple structure which could be used as a reactive platform for introducing further surface functionality. The surface nano-domains of VBC were exploited as reactive nano-patterns for site-specific chemical functionalization by firstly substituting the exposed chlorine moiety with azide, then “clicking” an alkyne by copper (I) catalyzed azide-alkyne Huisgen cycloaddition (CuAAC). Successful chemical modification was verified by NMR spectroscopy, FTIR spectroscopy, and XPS, with retention of the micro- and nanostructuration confirmed by SEM and AFM respectively. Protonation of the cyclotriazole surface groups triggered a switch in macroscopic behavior from a Cassie-Baxter state to a Wenzel state, highlighting the possibility of producing responsive surfaces with hierarchical structure.

scholarly journals Preparation of Hierarchical Highly Ordered Porous Films of Brominated Poly(phenylene oxide) and Hydrophilic SiO2/C Membrane via the Breath Figure Method

Materials ◽  
2018 ◽  
Vol 11 (4) ◽  
pp. 481 ◽  
Author(s):  
Hua Yuan ◽  
Bing Yu ◽  
Hailin Cong ◽  
Ming Chi ◽  
Yuanzhe Cheng ◽  
...  
Keyword(s):  
Porous Films ◽  
Phenylene Oxide ◽  
Breath Figure ◽  
Breath Figure Method ◽  
Ordered Porous

New polymethylene-based AB2 star copolymers synthesized via a combination of polyhomologation of ylides and atom transfer radical polymerization

RSC Advances ◽  
2015 ◽  
Vol 5 (10) ◽  
pp. 7090-7097 ◽  
Author(s):  
Yang Xue ◽  
Shuang-Shuang Zhang ◽  
Kun Cui ◽  
Jin Huang ◽  
Qiao-Ling Zhao ◽  
...  
Keyword(s):  
Atom Transfer Radical Polymerization ◽  
Radical Polymerization ◽  
Atom Transfer ◽  
Porous Films ◽  
Breath Figure ◽  
Star Copolymers

Polymethylene-based AB2 star copolymers were synthesized. PM-b-(PS)2 porous films and particles were fabricated via static breath-figure process and electrospraying, respectively.

One-Step Dynamic Fabrication of Asymmetric Multi-Layered Porous Films for Sustained Drug Delivery

2021 ◽  
Author(s):  
Pengcheng Cui ◽  
Silong Wu ◽  
Jun Xie ◽  
Jiaying Ma ◽  
Lingyun Ding ◽  
...  
Keyword(s):  
Drug Delivery ◽  
Porous Film ◽  
Porous Films ◽  
Inverse Emulsion ◽  
Sustained Drug Delivery ◽  
Breath Figure ◽  
One Step ◽  
Breath Figure Method

Asymmetric multi-layered porous film was prepared by casting inverse emulsion following the breath figure method. The porous morphologies both on the surface and in the bulk of the fabricated film...

Synthesis of polystyrene with cyclic, ionized and neutralized end groups and the self-assemblies templated by breath figures

2014 ◽  
Vol 5 (11) ◽  
pp. 3666-3672 ◽  
Author(s):  
Liang-Wei Zhu ◽  
Wu Yang ◽  
Yang Ou ◽  
Ling-Shu Wan ◽  
Zhi-Kang Xu
Keyword(s):  
The Self ◽  
Porous Films ◽  
Breath Figures ◽  
Breath Figure ◽  
End Groups ◽  
Breath Figure Method

Polymers with functional end groups are synthesized using a cyclic lactone ATRP initiator for honeycomb-patterned porous films by the breath figure method.

Sign in / Sign up

Export Citation Format

Share Document