Factors influencing the growth and topography of nanoscale films fabricated by ROMP-mediated continuous assembly of polymers

Guntari, Stefanie N.; Goh, Tor Kit; Blencowe, Anton; Wong, Edgar H. H.; Caruso, Frank; Qiao, Greg G.

doi:10.1039/c2py20692g

Cited by 24 publications

(40 citation statements)

References 35 publications

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“…A SEM image of the CAP‐coated fibres (Figure 4d) also indicates a rough but continuous surface coverage. Such nanoscale surface roughness from these CAP ROMP ‐generated films is expected, as demonstrated in our earlier studies with PMMA films on Si wafers 32, 35…”

Section: Resultssupporting

confidence: 73%

“…After 2 h of the CAP reaction with P1, the filter paper can resist the water droplet for only 18 s before it is absorbed into the filter paper compared to 120 s for a 25 h sample (Figure 1b). As we have demonstrated in our previous studies, longer CAP reaction times led to thicker films and higher surface coverage 32, 35. Therefore, it is likely that at short reaction times (e.g., 2 h) the film coverage on the filter paper was insufficient to resist the water droplets, leading to a higher absorption rate than the 25 h CAP ROMP sample.…”

Section: Resultsmentioning

confidence: 62%

“…Recently, we introduced a versatile approach to fabricate nanoscale films, referred to as the continuous assembly of polymers (CAP), which involves the controlled chain‐growth polymerization of macro‐crosslinkers—(bio)macromolecules functionalized with polymerizable moieties—from initiator‐functionalized substrates to afford surface‐confined, crosslinked, ultrathin films with tailored properties 32–35. The CAP approach has distinct advantages compared to conventional dip‐ and spray‐coating techniques, as CAP can generate nanoscale films with tunable composition and thickness (10–180 nm), controlled by reaction time, the macro‐crosslinker composition, and/or the type of controlled polymerization technique employed.…”

Section: Introductionmentioning

confidence: 99%

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(Super)hydrophobic and Multilayered Amphiphilic Films Prepared by Continuous Assembly of Polymers

Guntari

Khin

Wong

et al. 2013

Adv Funct Materials

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The continuous assembly of polymers (CAP) is used to fabricate tailored nanocoatings on a wide variety of substrates. Ring‐opening metathesis polymerization (ROMP) is used to mediate the CAP process (CAPROMP) to assemble specifically designed macromolecules into nanoengineered crosslinked films. Different films composed of single or multiple macromolecules are used to tune the surface wetting characteristics on various planar substrates, including porous substrates such as filter paper and cotton, and non‐porous subtrates such as aluminium foil and glass. By judicious selection of the macromolecules, these substrates, which are hydrophilic in nature, can be rendered (super)hydrophobic. The robustness of the ROMP catalysts and the reinitiation ability of the CAPROMP approach allow the production of layered multicomponent amphiphilic films with on‐demand switchable wettability. Such functional nanocoatings can be potentially applied as self‐cleaning surfaces, as waterproof woven fabrics, and for the next generation of microelectronic devices.

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Section: Resultssupporting

confidence: 73%

Section: Resultsmentioning

confidence: 62%

Section: Introductionmentioning

confidence: 99%

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(Super)hydrophobic and Multilayered Amphiphilic Films Prepared by Continuous Assembly of Polymers

Guntari

Khin

Wong

et al. 2013

Adv Funct Materials

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“…Herein, the viability of the continuous assembly of polymers (CAP) approach to produce CSPs with engineered features is investigated. The CAP approach utilizes controlled polymerization methodologies to mediate the continuous growth of macrocross‐linkers – (bio)macromolecules functionalized with pendent polymerizable moieties – from initiator‐functionalized surfaces to form surface‐confined, cross‐linked films in a single‐step . As the CAP films are cross‐linked, the resulting CSPs are expected to be robust towards a wide range of HPLC eluents.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Chiral Stationary Phases via Continuous Assembly of Polymers for Resolution of Enantiomers by Liquid Chromatography

Guntari

Nam

Pranata

et al. 2014

Macro Materials & Eng

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Precise stereochemical determination of chiral molecules is highly important, especially in the pharmaceutical industry where one enantiomer may have a therapeutic effect while the other has detrimental effects. Herein, the continuous assembly of polymers (CAP) mediated via ringopening metathesis polymerization (ROMP) is used to fabricate immobilized-type chiral stationary phases (CSPs) -as cross-linked thin films on solid supports -for enantiomeric separation. Optically active polysaccharides (chitosan and amylose) with aromatic substituents were pre-functionalized with pendent norbornene groups and subsequently employed as macrocross-linkers in the CAP ROMP process, building cross-linked films from initiator-functionalized mesoporous silica particles. The immobilized cross-linked films on mesoporous silica particles can act as CSPs. Therefore, the chiral recognition abilities of the CSPs were explored by liquid chromatography (LC). It was found that CSPs with higher amount of polysaccharide cross-linked films -made from multiple CAP reactionshave better chiral separation capabilities. This work demonstrates the versatility of the CAP approach to fabricate CSPs to tailor specific separation needs.

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“…When this same approach is conciliated with ring-opening metathesis polymerization (CAP ROMP ), stability increases. With very small percentage of pendant group stable compound can be achieved [20]. Cyclodextrin (CD) are capable of forming reversible interaction with other molecule or polymer because of hydrophobicityinits structure.…”

Section: Uv Responsivementioning

confidence: 99%

Responsive Systems in Food Packaging

Purkayastha

Biswal

Saha

2017

J Package Technol Res

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Responsive packaging systems can adapt to surrounding environments or react to stimuli in the food and/or regulate transport of encapsulated actives/nutrition in presence of external stimuli. It also converts chemical and biochemical signals into optical, electrical, mechanical signals etc. To allow real time food safety and quality monitoring along with extension of shelf-life of food products. These packaging systems are currently an emerging area in food packaging research and playing an increasingly important part in a diverse range of applications, such as nutrition delivery in controlled fashion, 'on demand' active delivery, spoilage indicators etc. This paper gives an overview of recent developments and challenges on the applications of stimuli-responsive materials towards food packaging area. We also highlight the future directions to convert research outcome into commercial products.

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Factors influencing the growth and topography of nanoscale films fabricated by ROMP-mediated continuous assembly of polymers

Cited by 24 publications

References 35 publications

(Super)hydrophobic and Multilayered Amphiphilic Films Prepared by Continuous Assembly of Polymers

(Super)hydrophobic and Multilayered Amphiphilic Films Prepared by Continuous Assembly of Polymers

Fabrication of Chiral Stationary Phases via Continuous Assembly of Polymers for Resolution of Enantiomers by Liquid Chromatography

Responsive Systems in Food Packaging

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