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

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...

scholarly journals Ordered Porous Films Prepared by the Breath Figure Method Based on Polystyrene-b-polyacrylonitrile

2013 ◽  
Vol 29 (05) ◽  
pp. 1107-1114
Author(s):  
TANG Lin ◽  
◽  
MA Xiao-Yan ◽  
SONG Ying ◽  
ZHOU Dong
Keyword(s):  
Porous Films ◽  
Breath Figure ◽  
Breath Figure Method ◽  
Ordered Porous

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 Antimicrobial Porous Surfaces Prepared by Breath Figures Approach

Materials ◽  
2018 ◽  
Vol 11 (8) ◽  
pp. 1266 ◽  
Author(s):  
Alexandra Muñoz-Bonilla ◽  
Rocío Cuervo-Rodríguez ◽  
Fátima López-Fabal ◽  
José Gómez-Garcés ◽  
Marta Fernández-García
Keyword(s):  
Block Copolymers ◽  
Side Chain ◽  
Porous Films ◽  
Narrow Pore Size Distribution ◽  
Breath Figures ◽  
Gram Positive Bacteria ◽  
Alkyl Groups ◽  
Porous Surfaces ◽  
Cationic Copolymers ◽  
Ordered Porous

Herein, efficient antimicrobial porous surfaces were prepared by breath figures approach from polymer solutions containing low content of block copolymers with high positive charge density. In brief, those block copolymers, which were used as additives, are composed of a polystyrene segment and a large antimicrobial block bearing flexible side chain with 1,3-thiazolium and 1,2,3-triazolium groups, PS54-b-PTTBM-M44, PS54-b-PTTBM-B44, having different alkyl groups, methyl or butyl, respectively. The antimicrobial block copolymers were blended with commercial polystyrene in very low proportions, from 3 to 9 wt %, and solubilized in THF. From these solutions, ordered porous films functionalized with antimicrobial cationic copolymers were fabricated, and the influence of alkylating agent and the amount of copolymer in the blend was investigated. Narrow pore size distribution was obtained for all the samples with pore diameters between 5 and 11 µm. The size of the pore decreased as the hydrophilicity of the system increased; thus, either as the content of copolymer was augmented in the blend or as the copolymers were quaternized with methyl iodide. The resulting porous polystyrene surfaces functionalized with low content of antimicrobial copolymers exhibited remarkable antibacterial efficiencies against Gram positive bacteria Staphylococcus aureus, and Candida parapsilosis fungi as microbial models.

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.

Highly Ordered Porous Polymer Films Prepared by Breath Figure Method

2012 ◽  
Vol 138 (1) ◽  
pp. 100-104 ◽  
Author(s):  
Ji-Lei Wang ◽  
Bing Yu ◽  
Hai-Lin Cong ◽  
Na Ma ◽  
Zhao-Qiang Du
Keyword(s):  
Polymer Films ◽  
Porous Polymer ◽  
Breath Figure ◽  
Breath Figure Method ◽  
Ordered Porous

Fabrication of highly ordered porous membranes of cellulose triacetate on ice substrates using breath figure method

2015 ◽  
Vol 53 (8) ◽  
pp. 552-558 ◽  
Author(s):  
Bing Yu ◽  
Hailin Cong ◽  
Zejing Li ◽  
Hua Yuan ◽  
Qiaohong Peng ◽  
...  
Keyword(s):  
Cellulose Triacetate ◽  
Porous Membranes ◽  
Breath Figure ◽  
Breath Figure Method ◽  
Ordered Porous

Breath Figure: A Nature-Inspired Preparation Method for Ordered Porous Films

2015 ◽  
Vol 115 (18) ◽  
pp. 9801-9868 ◽  
Author(s):  
Aijuan Zhang ◽  
Hua Bai ◽  
Lei Li
Keyword(s):  
Preparation Method ◽  
Porous Films ◽  
Breath Figure ◽  
Ordered Porous

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.

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