Nanostructure Dependent Surface Energy of Silica Nanorod Arrays through Block Copolymer Templating Processes

2011 ◽  
Vol 1312 ◽  
Author(s):  
Yongbin Zhao ◽  
Aihua Chen ◽  
Tomokazu Iyoda
Keyword(s):  
Block Copolymer ◽  
Volume Fraction ◽  
Contact Angles ◽  
Side Chain ◽  
Nanorod Arrays ◽  
Copolymer Films ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene ◽  
Hexagonally Ordered ◽  
Center Distance

ABSTRACTThe self-assembled block copolymer films with poly (ethylene oxide) (PEO) and hydrophobic polymetharylate (PMA) with azobenzene mesogen in the side chain, denoted as PEOm-b-PMA(Az)n, were used as the template to prepare hexagonally ordered silica nanorod arrays by immersing the template films in the silicate precursor containing tetraetoxysilane (TEOS). The diameter and the center-to-center distance of the SiO2 nanorod arrays were controlled by selecting the block copolymer with different PEO volume fraction. In addition, the contact angles of different kinds’ solvents for the SiO2 nanorod arrays were characterized. We further found, the diameter and the period distance of silica nanorods are very important factors for controlling the contact angle of different kind’s solvents on the surface of the SiO2 nanorod arrays.

A block copolymer of crosslinkable polythiophene and removable poly(ethylene oxide) for preparing heterostructures of organic semiconductors

2017 ◽  
Vol 5 (6) ◽  
pp. 1414-1419 ◽  
Author(s):  
T. Ube ◽  
T. Kosaka ◽  
H. Okazaki ◽  
K. Nakae ◽  
T. Ikeda
Keyword(s):  
Block Copolymer ◽  
Ethylene Oxide ◽  
Organic Semiconductors ◽  
Copolymer Films ◽  
Donor Acceptor ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene

Block copolymer films composed of polythiophene with cinnamate groups and poly(ethylene oxide) were prepared as template networks of donor/acceptor heterostructures.

Directed Self-Assembly of Thin Block Copolymer Films under Controlled Atmosphere

2006 ◽  
Vol 961 ◽  
Author(s):  
Sangcheol Kim ◽  
R. M. Briber ◽  
Alamgir Karim ◽  
Ronald L. Jones ◽  
Ho-Cheol Kim
Keyword(s):  
Block Copolymer ◽  
Self Assembly ◽  
Solubility Parameters ◽  
Controlled Atmosphere ◽  
Solvent Vapor ◽  
Copolymer Films ◽  
Polymer Solubility ◽  
Gradient Technique ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene

ABSTRACTWe have developed a simple and fast methodology to control the orientation of cylindrical microdomains in thin block copolymer films under controlled atmosphere conditions. Asymmetric block copolymers of polystyrene and poly(ethylene oxide) (PS-b-PEO) were dissolved in toluene and spin coated with less than one minute exposure to different solvent vapors and controlled humidity. The specific choice of solvents was based on the polymer solubility parameters and the solvent vapor pressure. By controlling the spin coating environment we were able to produce cylinders with orientations ranging from parallel to perpendicular with respect to the substrate. Orientation was apparently controlled by the preferential affinity of the vapor atmosphere. A combinatorial gradient technique was employed to investigate the mechanism of solvent-induced microdomain orientation.

Self-Healing Materials via Reversible Crosslinking of Poly(ethylene oxide)-Block-Poly(furfuryl glycidyl ether) (PEO-b-PFGE) Block Copolymer Films

2013 ◽  
Vol 23 (39) ◽  
pp. 4921-4932 ◽  
Author(s):  
Markus J. Barthel ◽  
Tobias Rudolph ◽  
Anke Teichler ◽  
Renzo M. Paulus ◽  
Jürgen Vitz ◽  
...  
Keyword(s):  
Block Copolymer ◽  
Ethylene Oxide ◽  
Glycidyl Ether ◽  
Self Healing ◽  
Copolymer Films ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene

Glucose-Responsive Hybrid Nanoassemblies in Aqueous Solutions: Ordered Phenylboronic Acid within Intermixed Poly(4-hydroxystyrene)-block-poly(ethylene oxide) Block Copolymer

2015 ◽  
Vol 16 (12) ◽  
pp. 3731-3739 ◽  
Author(s):  
Alicja Matuszewska ◽  
Mariusz Uchman ◽  
Agnieszka Adamczyk-Woźniak ◽  
Andrzej Sporzyński ◽  
Stergios Pispas ◽  
...  
Keyword(s):  
Block Copolymer ◽  
Ethylene Oxide ◽  
Aqueous Solutions ◽  
Phenylboronic Acid ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene

A study on emulsion stabilization induced with linear and cyclized polystyrene-poly(ethylene oxide) block copolymer surfactants

2015 ◽  
Vol 47 (5) ◽  
pp. 408-412 ◽  
Author(s):  
Eisuke Baba ◽  
Toshiaki Yatsunami ◽  
Takuya Yamamoto ◽  
Yasuyuki Tezuka
Keyword(s):  
Block Copolymer ◽  
Ethylene Oxide ◽  
Poly Ethylene Oxide ◽  
Emulsion Stabilization ◽  
Poly Ethylene

Nanostructured Polymers Obtained from Polyethylene-block-poly(ethylene oxide) Block Copolymer in Unsaturated Polyester

2007 ◽  
Vol 40 (7) ◽  
pp. 2532-2538 ◽  
Author(s):  
Christophe Sinturel ◽  
Marylène Vayer ◽  
René Erre ◽  
Heinz Amenitsch
Keyword(s):  
Block Copolymer ◽  
Ethylene Oxide ◽  
Unsaturated Polyester ◽  
Nanostructured Polymers ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene

Surface Modification of PEOT/PBT Membrane with Silk Fibroin Anchoring and its Potential Application in Artificial Salivary Gland Construct

2012 ◽  
Vol 538-541 ◽  
pp. 52-59
Author(s):  
Jie Zhu ◽  
Ming Shi Li ◽  
Li Qun Wang ◽  
Xiao Lin Zhu
Keyword(s):  
Salivary Gland ◽  
Silk Fibroin ◽  
Potential Application ◽  
Contact Angles ◽  
Water Contact ◽  
Polar Groups ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene ◽  
Surface Modified

We reported the preparation of surface modified poly (ethylene oxide terephthalate) - poly (butylene terephthalate) membrane by the method of silk fibroin anchoring, namely SF/(PEOT/PBT). Its surface properties were characterized by contact angles and XPS and the biocompatibility of the composite membrane was further evaluated by human salivary epithelial cells (HSG cells) growth in vitro. Results revealed that SF/(PEOT/PBT) possessed the low water contact angle (48.0±3.0°) and immobilized a great amount of fibroin (fibroin surface coverage: 26.39 wt%), which attributed to the formation of polar groups such as hydrosulfide group, sulfonic group, carboxyl and carbonyl ones in the process of SO2 plasma treatment. HSG cells growth in vitro indicated that the silk fibroin anchoring could significantly enhance the biocompatibility of PEOT/PBT membrane, which suggested the potential application of fibroin anchoring PEOT/PBT for clinical HSG cells transplantation in the artificial salivary gland construct.

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