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

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

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.

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

Nano-hydroxyapatite promotes self-assembly of honeycomb pores in poly(l-lactide) films through breath-figure method and MC3T3-E1 cell functions

RSC Advances ◽  
2015 ◽  
Vol 5 (9) ◽  
pp. 6607-6616 ◽  
Author(s):  
X. H. Wu ◽  
Z. Y. Wu ◽  
J. C. Su ◽  
Y. G. Yan ◽  
B. Q. Yu ◽  
...  
Keyword(s):  
Self Assembly ◽  
Cell Functions ◽  
Breath Figure ◽  
Breath Figure Method

The effects of nano-hydroxyapatite particles on the formation of honeycomb poly(l-lactide) films and MC3T3-E1 cell functions were investigated.

scholarly journals Formation of Hierarchical Porous Structure via Breath Figure Method

2018 ◽  
Vol 2018 ◽  
pp. 1-6 ◽  
Author(s):  
Yongjian Zhang ◽  
Zhiguang Li
Keyword(s):  
Porous Structure ◽  
Pore Size ◽  
Particle Concentration ◽  
Peripheral Region ◽  
Hierarchical Porous Structure ◽  
Porous Films ◽  
Breath Figure ◽  
Hierarchical Porous ◽  
The Hierarchical Structure ◽  
Breath Figure Method

The porous structure films of PS containing silica nanoparticles of different hydrophobicity were obtained from breath figure method. For the porous films, the pores at the peripheral region and the center region were compared. It was found that the pores at the peripheral region appeared more uniform in size and showed higher degree of ordering. In addition, the patterns of the porous film became more disordered with the enhancing concentration of nanoparticles, and the pore size of the pore was increased. With the increase of the content of SiOH, that is, decrease in particle hydrophobicity, the Si elements were aggregated at the surface of the film and the interior of the pores. A hierarchical porous structure had been obtained at appropriate humidity and particle concentration. Finally, a possible mechanism of the hierarchical structure was proposed.

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