Honeycomb structured porous films from amphiphilic block copolymers prepared via RAFT polymerization

Wong, Kam Cheong; Davis, Thomas P.; Barner‐Kowollik, Christopher; Stenzel, Martina H.

doi:10.1016/j.polymer.2007.06.048

Cited by 125 publications

(125 citation statements)

References 50 publications

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“…BA [216] PEGA [217] (MMA) [64] St [51,68,69,89,218] DMAM [218] NIPAM [219] (NVPI) [220] 332 [221] 336 [221] 338 [221] 382 [222] PEGA-b-NIPAM [217] (St-b-DMAM) [218] S S N…”

Section: *mentioning

confidence: 99%

“…tBA [283] 162 [339] S S C 4 H 9 S -C 163 [339] S S Ph N N N C 4 H 9 S BA [339] St [339] 164 [348] S S C 3 H 7 S MA [349] 165 [350] St [350] St-b-MA [350] 166 [351] S S C 4 H 9 S (BA) [351] (St) [351] (St-b-BA) [351] (BA-b-St) [351] 167 [337] S S C 6 H 13 S St [337] 168* [352] S S C 12 H 25 S 319 [352] (Continued) [283] St [283,353] 170 [283] S S S HO 2 C AA [354] DMAM [218] NIPAM [355] St [218,283] (St) [356] (SSO3Na) [167] DADMAC [357] 346 [358] AA-b-SSO3Na [354] 346-b-DMAM [358] (St-b-DMAM) [218] 171 [349] MA [349] MA-b-St [349] 172 [226] S S Br Ϫ N C 12 H 25 S ϩ St [226] 173 [227] 176 [350,360] POSS macro-RAFT agent…”

Section: S S Cn C 2 H 5 Smentioning

confidence: 99%

“…In both cases slow initiation by the macro-RAFT agent-derived propagating species was suggested as a possible explanation. However, Wong et al [218] reported that it was difficult to chain-extend PDMAM macro-RAFT agent with St and that it was important to make the PSt macro-RAFT agent first. Fig.…”

Section: Hnmentioning

confidence: 99%

See 2 more Smart Citations

Living Radical Polymerization by the RAFT Process - A Second Update

Moad¹,

Rizzardo²,

Thang³

2009

Aust. J. Chem.

906

720

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This paper provides a second update to the review of reversible deactivation radical polymerization achieved with thiocarbonylthio compounds (ZC(=S)SR) by a mechanism of reversible addition-fragmentation chain transfer (RAFT) that was published in June 2005 (Aust. J. Chem. 2005, 58, 379-410). The first update was published in November 2006 (Aust. J. Chem. 2006, 59, 669-692). This review cites over 500 papers that appeared during the period mid-2006 to mid-2009 covering various aspects of RAFT polymerization ranging from reagent synthesis and properties, kinetics and mechanism of polymerization, novel polymer syntheses and a diverse range of applications. Significant developments have occurred, particularly in the areas of novel RAFT agents, techniques for end-group removal and transformation, the production of micro/nanoparticles and modified surfaces, and biopolymer conjugates both for therapeutic and diagnostic applications.

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“…BA [216] PEGA [217] (MMA) [64] St [51,68,69,89,218] DMAM [218] NIPAM [219] (NVPI) [220] 332 [221] 336 [221] 338 [221] 382 [222] PEGA-b-NIPAM [217] (St-b-DMAM) [218] S S N…”

Section: *mentioning

confidence: 99%

Section: S S Cn C 2 H 5 Smentioning

confidence: 99%

See 1 more Smart Citation

Living Radical Polymerization by the RAFT Process - A Second Update

Moad¹,

Rizzardo²,

Thang³

2009

Aust. J. Chem.

906

720

View full text Add to dashboard Cite

show abstract

“…Regular pores cannot be obtained at very low (below 50%) and at elevated (above 80%) RH and pores were found to be more hydrophilic than the surface since they were created by encapsulation of the water droplets. 161 Zhang et al fabricated a porous PS film having an ordered pore structure for the purpose of using it as a template for patterning proteins. They used amino-terminated PS and fluorescein-isothiocyanate-conjugated bovine serum albumin was attached to the pores of the surface of the PS through cross-linking of glutaraldehyde.…”

mentioning

confidence: 99%

Anticholinesterase furocoumarins from Heracleum platytaenium, an endemic species to Idea mountains

Dincel¹

2013

Turk J Chem

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Seven different nonlinear height (h)-diameter (d) models were developed and compared for brutian pine (Pinus brutia Ten.), black pine (Pinus nigra Arnold), and Taurus cedar (Cedrus libani A.Rich.) in southern Turkey. Residual analysis was conducted to identify the error structure. A weighting factor of w i =1/d was found to be appropriate for achieving the equal error variance assumption. The performance of the models was compared and evaluated based on 6 statistical criteria and residual analysis. Results suggested that the Gompertz model was superior to the other models in terms of its predictive ability. These tree species were located throughout the Mediterranean region, covering a wide range of topographic and climatic conditions. It is well known that height-diameter relationships depend heavily on local environmental conditions. Differences in the height-diameter relationship among and between ecoregions were tested using the nonlinear extra sum of squares method. Test results suggested that height-diameter models significantly differed between ecoregions, indicating that ecoregion-based height-diameter models are needed for prediction purposes. The ecoregion-based height-diameter models developed in this study may provide more accurate information for developing forest growth and yield models.

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“…Similar to other amphiphilic block copolymers, such as polystyrene-block-poly(N,Ndimethylacrylamide) 39 and polystyrene-block-poly(acrylic acid) 16 , P4VP enhances the amphiphilicity of the block copolymer to facilitate stabilisation of water droplets and formation of honeycomb patterns. Although not able to dissolve in water due to its lipophobic property, P4VP segments act as hydrogen bond acceptors and can undergo hydrogen bonding with water molecules to stabilise the droplets.…”

Section: Formation Of Honeycomb Patterns On a Ps-b-p4vp Filmmentioning

confidence: 97%

Exploring Novel Polymer Coatings for Antimicrobial Applications

Chen¹

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The ideal remedy to resist bacterial contamination on surfaces is to avoid the initial attachment of bacteria. The combination of the advances of polymer science and the requirement for long-lasting sterilisation of surfaces gave birth to antimicrobial polymer coatings, which provide an effective approach to preventing the initial attachment of bacteria through biocidal or antibiofouling functions.To meet the requirements of biomedical applications, antimicrobial polymer coatings still need refinements on the basis of the interaction between bacteria and the materials. Concurrently, interdisciplinary studies have inspired novel designs of polymer coatings through introducing ordered patterns to improve their antimicrobial performance. These two points are the foundations of this thesis to explore three novel polymer coating systems focusing on their antimicrobial performance, i.e. antibiofouling, biocidal, and combined functionalities through surface patterning.For antibiofouling purposes, fluorinated polymers have been insufficiently used compared to superhydrophilic and zwitterionic polymer coatings, despite proven effective against the contamination by particles, proteins and marine organisms. It is worthwhile investigating the feasibility and efficacy of fluorinated polymers as antibiofouling materials. In Chapters 2 and 3, block and statistical copolymers of partly-fluorinated methacrylate monomer, 1H,1H-heptafluorobutyl methacrylate (HFBMA) and methyl methacrylate (MMA) were prepared and fabricated into thin films. Through thermal annealing, the migration of the HFBMA repeating units at the air-polymer interface diminished surface free energy. The decrease in surface energy was consistent with the increase of the composition of HFBMA, while the block copolymers showed a more efficient reduction in surface energy compared to statistical copolymers due to phase separation. Subsequently, the antibiofouling performance of the films against S. aureus and E. coli were examined, where stronger and more constant antibiofouling behaviour was observed for block copolymer coatings with higher compositions of HFBMA.The combination of antibiofouling and biocidal functionalities potentially enhances the efficacy of coatings. Coatings with surface patterning such as line/trench topographies in micro-scale are effective against the formation of biofilms. As one of novel designs, coatings with micro-scale pores in honeycomb patterns and their antimicrobial behaviour were systematically studied in Chapters 4 and 5. The honeycomb patterns were introduced to polystyrene-block-poly(4-vinlylpyridine) (PS-b-P4VP) through "breath figures" method. The influences of different casting and chemical parameters on the size and regularity of the patterns were investigated, through which honeycomb-patterned films ii with a range of pore sizes were fabricated for subsequent biological tests. In the meantime, biocidal function was integrated into the honeycomb-patterned film by quaternising the P4VP blocks. The antibiofouling activ...

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Honeycomb structured porous films from amphiphilic block copolymers prepared via RAFT polymerization

Cited by 125 publications

References 50 publications

Living Radical Polymerization by the RAFT Process - A Second Update

Living Radical Polymerization by the RAFT Process - A Second Update

Anticholinesterase furocoumarins from Heracleum platytaenium, an endemic species to Idea mountains

Exploring Novel Polymer Coatings for Antimicrobial Applications

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