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...

Effects of Substrate, Solvent, Graft Density and Graft Length on the Formation of Cellulose-Based Ordered Porous Film

2012 ◽  
Vol 496 ◽  
pp. 138-141 ◽  
Author(s):  
Wen Yong Liu ◽  
Yi Chen ◽  
Yue Jun Liu ◽  
Xi Hai Hao
Keyword(s):  
Silicon Substrate ◽  
Porous Film ◽  
Side Chain ◽  
Porous Films ◽  
Mica Substrate ◽  
Breath Figure ◽  
Breath Figure Method ◽  
Graft Density ◽  
Ordered Porous ◽  
Graft Length

We investigated the preparation of porous film of cellulose-based graft copolymer by breath figure method. The effects of substrate, solvent, graft density and graft length on the formation of porous film were elucidated. The results showed that ordered porous films could be facilely formed on the glass and mica substrate, while no ordered porous films were obtained on the silicon substrate. The ordered porous films were formed from the copolymer/CS2 solution, while no ordered porous films were done from the copolymer/CH2Cl2, CHCl3 and toluene solution. Moreover, no ordered porous films were obtained from the copolymer with spare graft density or with long side chain. The results indicated that the substrate, solvent, graft density and graft length had important effects on the ordered porous film.

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

scholarly journals Facile Fabrication of Superhydrophobic Surface from Fluorinated POSS Acrylate Copolymer via One-Step Breath Figure Method and Its Anti-Corrosion Property

Polymers ◽  
2019 ◽  
Vol 11 (12) ◽  
pp. 1953 ◽  
Author(s):  
Meng Liu ◽  
Xiaochen Zhang ◽  
Dong Wang ◽  
Jiaji Cheng ◽  
Xiujiang Pang ◽  
...  
Keyword(s):  
Corrosion Current ◽  
Corrosion Property ◽  
Superhydrophobic Coating ◽  
Acrylate Copolymer ◽  
Breath Figure ◽  
Acrylic Copolymers ◽  
One Step ◽  
Facile Fabrication ◽  
Breath Figure Method ◽  
Oligomeric Silsesquioxane

Novel fluorinated polyhedral oligomeric silsesquioxane (POSS) acrylic copolymers were synthesized by the radical solution polymerization. The superhydrophobic coating was prepared using a one-step breath figure method. Chemical constitution, morphology, hydrophobicity, and anticorrosion ability of as-prepared coatings were investigated by the corresponding equipment. The addition of proper fluorinated POSS can synchronously promote the formation of the micro-nano convex structure and the enrichment of fluorinated groups on the surface. Compared to commercial acrylic coating, the fluorinated POSS coating presented enhanced anticorrosion performance. The impedance was the highest and the corrosion current density was the lowest for superhydrophobic coating with 25 wt % fluorinated POSS.

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.

ATRP Synthesis of PS-b-PtBMA and Preparation of Porous Film

2013 ◽  
Vol 364 ◽  
pp. 679-683
Author(s):  
Chang Hao Yan ◽  
Zhi Jiao Zhang ◽  
Hai Yan Chen ◽  
Zhong Yi Xie ◽  
Ting Zhu ◽  
...  
Keyword(s):  
Block Copolymer ◽  
Atom Transfer Radical Polymerization ◽  
Radical Polymerization ◽  
Catalyst System ◽  
Porous Film ◽  
Atom Transfer ◽  
H Nmr ◽  
Breath Figure ◽  
Breath Figure Method ◽  
End Group

The polystyrene with end group of Br was synthesized by using MBrP as the initiator, CuBr/ PMDETA as the catalyst system according to atom transfer radical polymerization (ATRP). The effect of reaction temperature was studied and the system was confirmed as the active polymerization. Then PS-Br and CuBr/ PMDETA were respectively used as macroinitiator and catalyst to polymerize tBMA according to atom transfer radical polymerization (ATRP). The structure of the product was characterized by GPCFTIR1H-NMR. The amphiphilic block copolymer was obtained after hydrolysis. And the honeycomb porous film was prepared by PS-b-PMAA through using breath figure method.

Porous membranes based on poly(ether imide)-graft-poly(vinyl acetate) as a scaffold for cell growth

2017 ◽  
Vol 33 (2) ◽  
pp. 178-194 ◽  
Author(s):  
Bin Liu ◽  
Jiangying Kuang ◽  
Leishan Shao ◽  
Xinyuan Che ◽  
Fei Wang ◽  
...  
Keyword(s):  
Cell Growth ◽  
Vinyl Acetate ◽  
Photoelectron Spectroscopy ◽  
Weight Ratio ◽  
Film Surface ◽  
Porous Film ◽  
Surface Topology ◽  
Proton Nuclear Magnetic Resonance ◽  
Porous Films ◽  
Breath Figure

A series of poly(ether imide)-graft-poly(vinyl acetate) copolymers with different molecular weights were synthesized successfully and characterized using Fourier transform infrared spectroscopy, ultraviolet–visible spectroscopy, proton nuclear magnetic resonance, gel permeation chromatography, differential scanning calorimeter, thermogravimetric analysis, and X-ray photoelectron spectroscopy analyses. These copolymers were used to fabricate honeycomb-structured porous films using the breath figure templating technique. The surface topology and composition of the highly ordered pattern film were further characterized using a scanning electron microscopy. The results indicated that the poly(ether imide)-graft-poly(vinyl acetate) graft molecular weight ratio influenced the breath figure film surface topology. A model was proposed to elucidate the stabilization process of the poly(ether imide)-graft-poly(vinyl acetate)-aggregated architecture on the water droplet–based templates. In addition, cell viability has been investigated via 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide test, and the cell morphology on the honeycomb-structured poly(ether imide)-graft-poly(vinyl acetate) porous film has been evaluated using a fluorescence microscope. This porous film is shown to be suitable as a matrix for cell growth.

Role of each part of cyanobiphenyl-containing polymers in porous-film preparation by using the breath-figure method

2019 ◽  
Vol 47 (8) ◽  
pp. 1139-1144
Author(s):  
Yumiko Naka ◽  
Lisa Nagashima ◽  
Hiromu Takayama ◽  
Khoa Van Le ◽  
Takeo Sasaki
Keyword(s):  
Porous Film ◽  
Breath Figure ◽  
Breath Figure Method ◽  
Film Preparation

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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