Attachment of bis-(trifluoromethyl)aryl labels onto the chain ends of poly(ethylene terephthalate) (PET) track-etched membranes and films by surface wet chemistry

Biltresse, Stéphane; Descamps, Dimitri; Boxus, Thierry; Marchand‐Brynaert, Jacqueline

doi:10.1002/1099-0518(20001001)38:19<3510::aid-pola70>3.0.co;2-l

Cited by 21 publications

(9 citation statements)

References 41 publications

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“…However, since in many cases only the surface layer of a product needs to possess these specific properties, a much more efficient approach involves the use of a relatively 50 cheap commodity polymer to provide the desirable, mechanical bulk properties and modification of the surface to introduce the desired surface properties. Examples of current methodologies for fluorinating polymer surfaces include plasma treatments, [1][2][3][4] wet chemical modification [5][6][7] and the 55 application of polymeric surface coatings. 8,9 , although all of these approaches tend to suffer from (at least one of) being expensive, restricted to batch processing, safety hazards or the generation of large volumes of solvent waste.…”

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confidence: 99%

Multi-end functionalised polymer additives synthesised by living anionic polymerisation—the impact of additive molecular structure upon surface properties

Sarih

Thompson

2011

Polym. Chem.

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. (2011) 'Multi-end functionalised polymer additives synthesised by living anionic polymerisation-the impact of additive molecular structure upon surface properties.', Polymer chemistry., 2 (4). pp. 851-861. Further information on publisher's website:http://dx.doi.org/10.1039/c0py00362jPublisher's copyright statement:Additional information: Use policyThe full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-prot purposes provided that:• a full bibliographic reference is made to the original source • a link is made to the metadata record in DRO • the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders.Please consult the full DRO policy for further details. Abstract Numerous applications require specific properties at polymer surfaces that differ from the bulk. Herein we describe the novel synthesis of a series of multi-end functionalised poly(styrene) and poly(isoprene) additives carrying 1 to 3 fluoroalkyl (CF) groups. The additives 10 were prepared by end capping the living chain ends of polymers prepared via living anionic polymerisation. The resulting polymers have been used as additives to render the surface of polymer films hydrophobic/lipophobic and we have characterised these polymer films using static contact angle measurements with water as the contact fluid. We have found that additive molecular weight, the number of CF groups, additive concentration and annealing conditions have a 15 significant impact upon the resulting surface properties. Increasing the additive concentration and/or number of CF groups resulted in higher contact angles whereas increasing the molecular weight of additive reduced contact angles and surface h ydrophobicity. It has been discovered that these additives undergo rapid adsorption to the surface of a thin film in the time taken to produce the film by spin coating and the result is significantly enhanced surface properties. Annealing 20 polystyrene films above the glass transition temperature revealed some interesting behaviour in so much that it demonstrated that on many occasions it is preferable to anneal films containing very small quantities of additive rather than to simply add greater quantities of additive. In addition to contact angles measurements, Rutherford backscattering analysis (RBS) has been carried out on examples of modified poly(isoprene) films to quantitatively analyse the effect of additive 25 molecular weight and number of fluoroalkyl groups on the near surface elemental composition of the modified thin films and confirming the relationship (described above) between these additive molecular parameters and surface adsorption. Finally, we have described a model which compares the behaviour of the additives in thin films to surfactants in solution.

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confidence: 99%

Multi-end functionalised polymer additives synthesised by living anionic polymerisation—the impact of additive molecular structure upon surface properties

Sarih

Thompson

2011

Polym. Chem.

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“…For instance, harsh chemical hydrolysis 14 (Fig. 1) was used for immobilization on inert polymers such as polypropylene (PP) and PET.…”

Section: Introductionmentioning

confidence: 99%

Novel N-chloramine precursors for antimicrobial application: synthesis and facile covalent immobilization on polyurethane surface based on perfluorophenyl azide (PFPA) chemistry

Zhang

Gai

et al. 2018

Can. J. Chem.

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To control the pathogen cross contaminations on medical material surface, there is a pressing need to develop antimicrobial materials with highly efficacious surface biocidal activity. In this work, N-chloramine precursors containing a quaternary ammonium unit and perfluorophenyl azide unit were synthesized and covalently immobilized on inert polyurethane (PU) film upon UV light irradiation. The surface modification was confirmed by contact angle, Fourier transform infrared (ATR FTIR) spectroscopy, X-ray photoelectron spectroscopy (XPS), and atomic force microscopy (AFM) analyses. After bleaching treatment, satisfactory biocidal activity was achieved for the surface-modified PU films. It was found that the introduced surface QA center contributed an even faster surface contact killing behavior and that precursors with a longer structural linker caused higher surface chlorine content and higher antimicrobial efficacy. This approach provides a novel and facile method that enables the covalent immobilization of N-chloramine precursors on inert polymeric surface to produce durable antimicrobial materials.

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“…Polymer recycling generally requires energetically and chemically intense methods (e.g., mechanical, thermal, and chemical recycling) . Similarly, surface modification of polymers often requires costly and specialize reagents and equipment (e.g., plasma modification as well as harsh reaction conditions . In contrast, inherent advantages of enzymatic surface chemistry includes specificity, reduced energy consumption, reactions in aqueous media, and which occur exclusively at material surfaces since proteins are immiscible with most polymeric materials .…”

Section: Introductionmentioning

confidence: 99%

Toward rational thermostabilization of Aspergillus oryzae cutinase: Insights into catalytic and structural stability

et al. 2015

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Cutinases are powerful hydrolases that can cleave ester bonds of polyesters such as poly(ethyleneterephthalate) (PET), opening up new options for enzymatic routes for polymer recycling and surface modification reactions. Cutinase from Apsergillus oryzae (AoC) is promising owing to the presence of an extended groove near the catalytic triad which is important for the orientation of polymeric chains. However, the catalytic efficiency of AoC on rigid polymers like PET is limited by its low thermostability; as it is essential to work at or over the glass transition temperature (Tg) of PET i.e. 70 °C. Consequently, in this study we worked towards the thermostabilization of AoC. Use of Rosetta computational protein design software in conjunction with rational design led to a 6 °C improvement in the thermal unfolding temperature (Tm) and a 10-fold increase in the half-life of the enzyme activity at 60 °C. Surprisingly, thermostabilization did not improve the rate or temperature optimum of enzyme activity. Three notable findings are presented as steps toward designing more thermophilic cutinase: (a) surface salt bridge optimization produced enthalpic stabilization, (b) mutations to proline reduced the entropy loss upon folding and (c) the lack of a correlative increase in the temperature optimum of catalytic activity with thermodynamic stability suggests that the active site is locally denatured at a temperature below the Tm of the global structure.

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Attachment of bis-(trifluoromethyl)aryl labels onto the chain ends of poly(ethylene terephthalate) (PET) track-etched membranes and films by surface wet chemistry

Cited by 21 publications

References 41 publications

Multi-end functionalised polymer additives synthesised by living anionic polymerisation—the impact of additive molecular structure upon surface properties

Multi-end functionalised polymer additives synthesised by living anionic polymerisation—the impact of additive molecular structure upon surface properties

Novel N-chloramine precursors for antimicrobial application: synthesis and facile covalent immobilization on polyurethane surface based on perfluorophenyl azide (PFPA) chemistry

Toward rational thermostabilization of Aspergillus oryzae cutinase: Insights into catalytic and structural stability

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