scholarly journals 3D inkjet printing of star block copolymer hydrogels cross-linked using various metallic ions

RSC Advances ◽  
2017 ◽  
Vol 7 (88) ◽  
pp. 55571-55576
Author(s):  
Y. Nakagawa ◽  
S. Ohta ◽  
M. Nakamura ◽  
T. Ito
Keyword(s):  
Block Copolymer ◽  
Inkjet Printing ◽  
Metallic Ions ◽  
Star Block Copolymer ◽  
First Time

We have, for the first time, investigated 3D inkjet printing of ionically cross-linked star block copolymer hydrogels.

Ion chemistry of transition metals in hydrocarbon flames. II. Cations of Sc, Ti, V, Cr, and Mn

1988 ◽  
Vol 66 (9) ◽  
pp. 2219-2228 ◽  
Author(s):  
John M. Goodings ◽  
Quang Tran ◽  
Nicholas S. Karellas
Keyword(s):  
Transition Metals ◽  
Metal Atom ◽  
Chemical Ionization ◽  
Metallic Ions ◽  
Ion Chemistry ◽  
Hydrocarbon Flames ◽  
Basic Series ◽  
First Time ◽  
Isomeric Structures

The same fuel-rich, premixed, conical, methane–oxygen flame at 2200 K and atmospheric pressure used for studies of Fe, Co, Ni, Cu, and Zn in Part I (1) is doped with the same concentration (~1 ppm) of Sc, Ti, V, Cr, and Mn to complete the first row of ten transition metals. Metallic ions of these metals and their compounds formed by chemical ionization reactions with H3O+ are observed by sampling the flame through a nozzle into a quadrupole mass spectrometer. Concentration profiles of individual and total cations are measured as a function of distance along the flame axis, and also mass spectra at a fixed point in the burnt gas. If A is the metal atom, the observed ions can be represented by four hydrate series including (a) A+•nH2O, (b) AOH+•nH2O, (c) AO+•nH2O, and (d) AO2H+•nH2O with n = 0–3 or 4, giving a maximum of four ligands around the metal atom. However, alternative isomeric structures are possible for each of the four basic series (e.g. AO+•2H2O ~ A(OH)2+•H2O ~ A(OH)3H+). The ions observed with Cr and Mn, in common with those of Fe, Co, Ni, and Cu, strongly favour series (a). On the other hand, Sc is completely different; the ions of series (c) are dominant. All four series are observed with each of Ti and V. Series (b) dominates for Ti and series (c) for V; ions from series (d) were observed for the first time. The ion chemistry of these metals is discussed in detail with emphasis on the probable chemical ionization reactions responsible for metallic ion formation. The pre-eminent role of proton transfer processes is apparent.

Printing ultrathin graphene oxide nanofiltration membranes for water purification

2017 ◽  
Vol 5 (39) ◽  
pp. 20860-20866 ◽  
Author(s):  
Mahdi Fathizadeh ◽  
Huynh Ngoc Tien ◽  
Konstantin Khivantsev ◽  
Jung-Tsai Chen ◽  
Miao Yu
Keyword(s):  
Graphene Oxide ◽  
Water Purification ◽  
Inkjet Printing ◽  
Low Cost ◽  
Nanofiltration Membranes ◽  
Highly Effective ◽  
First Time ◽  
Polymeric Supports ◽  
Effective Water

We demonstrated for the first time that inkjet printing can be a low-cost, easy, fast, and scalable method for depositing ultrathin (7.5–60 nm) uniform graphene oxide (GO) nanofiltration membranes on polymeric supports for highly effective water purification.

PBA-PMMA 3-Arm Star Block Copolymer Thermoplastic Elastomers

2008 ◽  
Vol 209 (16) ◽  
pp. 1686-1693 ◽  
Author(s):  
Bruno Dufour ◽  
Kaloian Koynov ◽  
Tadeusz Pakula ◽  
Krzysztof Matyjaszewski
Keyword(s):  
Block Copolymer ◽  
Thermoplastic Elastomers ◽  
Star Block Copolymer

The Preparation and Characterization of Amphiphilic Star Block Copolymer Nano Micelles Using Silsesquioxane As the Core

2010 ◽  
Vol 114 (32) ◽  
pp. 13471-13476 ◽  
Author(s):  
Caihua Ni ◽  
Geng Wu ◽  
Changping Zhu ◽  
Bolong Yao
Keyword(s):  
Block Copolymer ◽  
The Core ◽  
Star Block Copolymer
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