Preparation and Properties of Nanoporous Triblock Copolymer Membranes

Liu, Guojun; Ding, Jianfu; Stewart, Sean

doi:10.1002/(sici)1521-3773(19990315)38:6<835::aid-anie835>3.0.co;2-r

Cited by 66 publications

(25 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Although the main emphasis will involve examples prepared in by Guojun Liu and coworkers, relevant work from other researchers will be included as well. This combination of synthetic, self-assembly, and processing strategies leads to a diverse range of block copolymer nanostructures, including microspheres [35,50,51], nanospheres [52,53], bumpy spheres [54,55], vesicles [56,57], tadpoles [58][59][60], macrocycles [61], nanofibers [62,63], nanotubes [64,65], thin films containing nanochannels [66][67][68][69], miktoarm copolymers [70], helices [71][72][73], crosslinked polymer brushes [74], and Janus particles [75]. These structures also have a variety of potential applications, such as drug delivery [76], separations [77,78], assay systems [51,55], as catalysts [79], materials for superamphiphobic surfaces [80,81], and improved friction reduction among lubricating oils [82,83].…”

Section: Focus Of This Reviewmentioning

confidence: 99%

“…Sculpted nanostructures or permanent sculpted nanostructures can provide ideal hosts for guests such as organic molecules [76] or transition metals [52]. Alternatively, this process also yields porous nanostructures [50,65,98] and membranes [66][67][68][69], which may be used for separations or for absorbing contaminants from their surroundings [77,78,99].…”

Section: The Roads: Self-assembly Directed Assembly Crosslinking Amentioning

confidence: 99%

See 1 more Smart Citation

Self-assembly and chemical processing of block copolymers: a roadmap towards a diverse array of block copolymer nanostructures

Wyman

Liu

2013

Sci. China Life Sci.

View full text Add to dashboard Cite

Block copolymers can yield a diverse array of nanostructures. Their assembly structures are influenced by their inherent structures, and the wide variety of structures that can be prepared especially becomes apparent when one considers the number of routes available to prepare block copolymer assemblies. Some examples include self-assembly, directed assembly, coupling, as well as hierarchical assembly, which can yield assemblies having even higher structural order. These assembly routes can also be complemented by processing techniques such as selective crosslinking and etching, the former technique leading to permanent structures, the latter towards sculpted and the combination of the two towards permanent sculpted structures. The combination of these pathways provides extremely versatile routes towards an exciting variety of architectures. This review will attempt to highlight destinations reached by LIU Guojun and coworkers following these pathways.

show abstract

Section: Focus Of This Reviewmentioning

confidence: 99%

Section: The Roads: Self-assembly Directed Assembly Crosslinking Amentioning

confidence: 99%

Self-assembly and chemical processing of block copolymers: a roadmap towards a diverse array of block copolymer nanostructures

Wyman

Liu

2013

Sci. China Life Sci.

View full text Add to dashboard Cite

show abstract

“…The first report of using a triblock polymer for the preparation of a nanoporous membrane was in 1999. [1] The authors synthesized, via anionic polym erization, PI-b-PHEMA-b-PtBA (PI = polyisoprene, PHEMA = poly(2-hydroxyethyl methacrylate), PtBA = poly( tert-butylacrylate)), which was subsequently reacted with cinnam oyl chloride in pyridine to give PI-b-PCEMA-b-PtBA. Transmission electron m icroscopy (TEM) of Os O 4 stained thin-slices (50 nm ) showed interconnected tortuous cylinders in the PI-b-PCEMA matrix.…”

Section: Figuresmentioning

confidence: 99%

Triblock polymers for nanoporous membranes.

Cordaro¹,

Myllenbeck²,

George³

et al. 2012

View full text Add to dashboard Cite

The fabrication of nanoporous thin-film membranes from block polym ers is proposed. A computational modeling effort is described, which optimizes the polymer block lengths in order to obtain therm odynamically favorable phase-separated morphologies. Synthetic rout es to access po ly(ethylene oxide) and p oly (methyl methacrylate)-based block polymers are outlined. These materials were then prepared using controlled free rad ical polymerization. The relative adv antages and disadvantages of numerous routes are discus sed. Characterization of di-and triblock polymers using nuclear m agnetic resonance spectroscopy and size-exclusion chromatograph revealed less than id eal re-initiation and cha in growth o f macroinitiators. Preliminary phase-behavior of these materials is reported from smallangle x-ray scattering and scanning electron microscopy. 4 ACKNOWLEDGMENTS Sandia National Labora tories is a multi-p rogram laboratory managed and opera ted by Sandia Corporation, a wholly owned subsidiary of Lockheed Mar tin Corporation, for the U.S. Department of Energy's Nationa l Nuclear Security Adm inistration under contract DE-AC04-94AL85000.

show abstract

“…Nanoporous thin films could be obtained through selective removal of one block from a self-assembled block copolymer solid. Such materials may have applications in templating, separation, catalysis and sensors [9][10][11][12][13][14][15][16][17][18][19][20][21][22][23]. The removal of a polymer block is typically achieved through ozonolysis, photolysis, chemical etching, and reactive ion etching [9,[24][25][26][27].…”

Section: Introductionmentioning

confidence: 99%

Modular synthesis of a block copolymer with a cleavable linkage via “click” chemistry

Liu

2010

Sci. China Chem.

Self Cite

View full text Add to dashboard Cite

A diblock copolymer poly(ethylene glycol)-block-polystyrene or PEG-b-PS with an olefinic double bond at the PEG and PS junction has been prepared by modular synthesis via "click" chemistry. This involved the synthesis of PS by atom transfer radical polymerization and the nucleophilic substitution of the terminal bromide group with azide to yield azide-terminated PS. PEG with an alkynyl terminal group was prepared from reacting carboxyl-end-functionalized PEG with 4-hydroxybut-2-enyl prop-2'-ynyl succinate, which contained an alkynyl group as well as an olefin group. The PS and PEG polymers were linked via the 1,3-dipolar cycloaddition of the end azide and alkyne groups. The obtained copolymer was characterized by 1 H NMR spectroscopy and size exclusion chromatography (SEC). SEC analysis indicated that the diblock copolymer produced could be readily cleaved by ozonolysis to regenerate the constituent homopolymers. modular synthesis, cleavable block copolymer, click chemistry, ATRP

show abstract

Preparation and Properties of Nanoporous Triblock Copolymer Membranes

Cited by 66 publications

References 14 publications

Self-assembly and chemical processing of block copolymers: a roadmap towards a diverse array of block copolymer nanostructures

Self-assembly and chemical processing of block copolymers: a roadmap towards a diverse array of block copolymer nanostructures

Triblock polymers for nanoporous membranes.

Modular synthesis of a block copolymer with a cleavable linkage via “click” chemistry

Contact Info

Product

Resources

About