Ordered porous structure hybrid films generated by breath figures for directional water penetration

RSC Advances ◽  
2015 ◽  
Vol 5 (107) ◽  
pp. 88471-88476 ◽  
Author(s):  
Tianqi Guo ◽  
Keyu Han ◽  
Liping Heng ◽  
Moyuan Cao ◽  
Lei Jiang
Keyword(s):  
Porous Structure ◽  
Hybrid Film ◽  
Hybrid Films ◽  
Substrate Roughness ◽  
Water Penetration ◽  
Breath Figures ◽  
Ordered Porous

A highly ordered open-pore hybrid film was fabricated by controlling the substrate roughness and wettability. The composite with different wettability on the two side resulted in an attractive unidirectional water-penetration function (see figure).

MORPHOLOGY AND CHARACTERIZATION OF POLYIMIDE/POLYSILSESQUIOXANE HYBRID FILMS WITH MESO/MACRO DOUBLE POROUS STRUCTURE

2004 ◽  
Vol 13 (03n04) ◽  
pp. 541-545
Author(s):  
KYUNG-IL KIM ◽  
JUN-YOUNG LEE ◽  
JOON-HYUN AN ◽  
JUNG-HYUN KIM
Keyword(s):  
Porous Structure ◽  
Organic Molecules ◽  
Hybrid Film ◽  
Sol Gel ◽  
Matrix Material ◽  
Hybrid Films ◽  
Hybrid Thin Film ◽  
Sol Gel Process ◽  
Temperature And Pressure

Supercritical CO 2 ( ScCO 2) can dissolve organic materials easily just by changing temperature and pressure. This property of ScCO 2 can be applied to extract some ScCO 2-philic organic molecules from matrix material. The ScCO 2 was used to generate the meso/macro double porous structure of polyimide/polysilsesquioxane (PI/PSSQ) hybrid film. The morphology of the porous structure was measured by scanning electron microscope (SEM). Here, we demonstrate that the ScCO 2 could penetrate into the hybrid thin film and take away the small molecules, which are the by-product ( CO 2) from the imidization reaction of the PI segment and the solvent remained in the PSSQ segment by sol-gel process.

scholarly journals Physico-Chemical Characterization and Antimicrobial Properties of Hybrid Film Based on Saponite and Phloxine B

Molecules ◽  
2021 ◽  
Vol 26 (2) ◽  
pp. 325
Author(s):  
Nitin Chandra teja Dadi ◽  
Matúš Dohál ◽  
Veronika Medvecká ◽  
Juraj Bujdák ◽  
Kamila Koči ◽  
...  
Keyword(s):  
Hybrid Film ◽  
Antimicrobial Properties ◽  
Chemical Characterization ◽  
Layered Silicate ◽  
Contact Angles ◽  
Exchange Capacity ◽  
Resistant Bacteria ◽  
Hybrid Films ◽  
Water Contact ◽  
Physico Chemical

This research was aimed at the preparation of a hybrid film based on a layered silicate saponite (Sap) with the immobilized photosensitizer phloxine B (PhB). Sap was selected because of its high cation exchange capacity, ability to exfoliate into nanolayers, and to modify different surfaces. The X-ray diffraction of the films confirmed the intercalation of both the surfactant and PhB molecules in the Sap film. The photosensitizer retained its photoactivity in the hybrid films, as shown by fluorescence spectra measurements. The water contact angles and the measurement of surface free energy demonstrated the hydrophilic nature of the hybrid films. Antimicrobial effectiveness, assessed by the photodynamic inactivation on hybrid films, was tested against a standard strain and against methicillin-resistant bacteria of Staphylococcus aureus (MRSA). One group of samples was irradiated (green LED light; 2.5 h) and compared to nonirradiated ones. S. aureus strains manifested a reduction in growth from 1-log10 to over 3-log10 compared to the control samples with Sap only, and defects in S. aureus cells were proven by scanning electron microscopy. The results proved the optimal photo-physical properties and anti-MRSA potential of this newly designed hybrid system that reflects recent progress in the modification of surfaces for various medical applications.

scholarly journals Chiral platinum–polypyrrole hybrid films as efficient enantioselective actuators

2019 ◽  
Vol 55 (73) ◽  
pp. 10956-10959 ◽  
Author(s):  
Sunpet Assavapanumat ◽  
Bhavana Gupta ◽  
Gerardo Salinas ◽  
Bertrand Goudeau ◽  
Chularat Wattanakit ◽  
...  
Keyword(s):  
Hybrid Film ◽  
Hybrid Films ◽  
Mesoporous Platinum

A hybrid film composed of chiral encoded mesoporous platinum and polypyrrole shows differential wireless actuation as a function of the chiral nature of an enantiomer present in solution.

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.

scholarly journals Mesoporous Cu-SBA-15 with highly ordered porous structure and its excellent CO2 adsorption capacity

2018 ◽  
Vol 267 ◽  
pp. 134-141 ◽  
Author(s):  
Kripal S. Lakhi ◽  
Gurwinder Singh ◽  
Sungho Kim ◽  
Arun V. Baskar ◽  
Stalin Joseph ◽  
...  
Keyword(s):  
Porous Structure ◽  
Adsorption Capacity ◽  
Co2 Adsorption ◽  
Co2 Adsorption Capacity ◽  
Ordered Porous

Controlled synthesis of three dimensional mesoporous C3N4 with ordered porous structure for room temperature Suzuki coupling reaction

2019 ◽  
Vol 477 ◽  
pp. 110548 ◽  
Author(s):  
Siddulu Naidu Talapaneni ◽  
Kavitha Ramadass ◽  
Mercy R. Benzigar ◽  
Kripal S. Lakhi ◽  
Jae-Hun Yang ◽  
...  
Keyword(s):  
Porous Structure ◽  
Room Temperature ◽  
Three Dimensional ◽  
Coupling Reaction ◽  
Suzuki Coupling ◽  
Controlled Synthesis ◽  
Suzuki Coupling Reaction ◽  
Ordered Porous

Novel Bionic Biomembrane Supported by Gold Nanoparticles/Cellulose Hybrid Films

2012 ◽  
Vol 84 ◽  
pp. 13-18 ◽  
Author(s):  
Zhi Ming Liu ◽  
Yuan Lin An ◽  
Wen Jian Wu
Keyword(s):  
Gold Nanoparticles ◽  
Aqueous Solutions ◽  
Lipid Membranes ◽  
Hybrid Film ◽  
Bilayer Lipid Membranes ◽  
Hybrid Films ◽  
Bilayer Lipid ◽  
Long Period ◽  
Highly Active ◽  
The Stability

As one of the main methods to study biomembranes, the construction of highly active bionic biomembrane systems is very important. Based on the hybrid film of gold nanoparticles and cellulose, a novel system of bionic biomembrane is demonstrated. The ratio effects of lecithin to cholesterin on the stability of bilayer lipid membranes are studied. Lipid solutions that can form stable membranes in the air and in some aqueous solutions are prepared. The bionic biomembranes composed of bilayer lipid membranes and hybrid films of gold nanoparticles and cellulose can be sustained for a long period in aqueous solutions. The bionic biomembranes also exhibit some interesting electrochemical properties.

3D printing of a mechanically durable superhydrophobic porous membrane for oil–water separation

2017 ◽  
Vol 5 (24) ◽  
pp. 12435-12444 ◽  
Author(s):  
Juan Lv ◽  
Zhengjun Gong ◽  
Zhoukun He ◽  
Jian Yang ◽  
Yanqiu Chen ◽  
...  
Keyword(s):  
3D Printing ◽  
Porous Structure ◽  
Porous Membrane ◽  
Structure Design ◽  
Water Separation ◽  
Oil Water Separation ◽  
Oil Water ◽  
Ordered Porous

Through structure design, 3D printing enables the fabrication of mechanically durable superhydrophobic membranes with an ordered porous structure for oil–water separation.

Corrosion Resistance of Hybrid Films Applied on TiN Plate: Precursor Solution Acidified with Hydrochloric Acid

2014 ◽  
Vol 775-776 ◽  
pp. 370-374
Author(s):  
Sandra Raquel Kunst ◽  
Gustavo Alberto Ludwig ◽  
Cláudia Trindade Oliveira ◽  
Joseane Santana ◽  
Victor Hugo Vitorino Sarmento ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Hydrochloric Acid ◽  
Crack Formation ◽  
Hybrid Film ◽  
Precursor Solution ◽  
Dip Coating ◽  
Hybrid Films ◽  
Angle Measurements ◽  
Contact Angle Measurements ◽  
Alkoxide Precursors

The aim of this work is to coat tin plate with a hybrid film obtained from a sol consisting of alkoxide precursors: 3 - (trimethoxysilylpropyl) methacrylate (TMSM), poly (methyl methacrylate) PMMA with and without tetraethoxysilane (TEOS) addition. The pH = 3 was adjusted with hydrochloric acid. The films were obtained by dip-coating process, cured for 3 hours at 160 ° C, and characterized for their electrochemical behavior. The hydrophobicity of the film was determined by the contact angle measurements and its morphology was evaluated by SEM. Results showed that the hybrid films studied presented good performance concerning their corrosion resistance in tin plate. Besides the addition of TEOS, it has contributed to the increase of the film thickness, however at the same time promoting the crack formation, which compromises the corrosion resistance of the coated tin plate.

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