Mapping physicochemical surface modifications of flame-treated polypropylene

Farris, Stefano; Pozzoli, S.; Vecchia, S. La; Biagioni, Paolo; Bianchi, Claudia L.; Piergiovanni, Luciano

doi:10.3144/expresspolymlett.2014.29

Cited by 15 publications

(11 citation statements)

References 44 publications

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“…Values of γ GS of PP and modified PP were 22.5 ± 0.5 and 23.9 ± 2.3 mN m –1 , respectively. Comparable results of surface energy for PP have been reported . The low level of surface energy may have been given by the presence of styrene units in SMA, providing low polarity to the antimicrobial coating.…”

Section: Resultsmentioning

confidence: 80%

Antimicrobial Coatings with Dual Cationic and N-Halamine Character: Characterization and Biocidal Efficacy

Bastarrachea

Goddard

2015

J. Agric. Food Chem.

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A method to prepare an antimicrobial coating for food-handling materials is reported. Alternating layers of branched polyethylenimine and styrene maleic anhydride copolymer were applied onto the surface of polypropylene. The resulting coatings had low surface energy and presented enhanced antimicrobial character due to the presence of both cationic and N-halamine forming structures. In its unchlorinated form, the coating inactivated Listeria monocytogenes by ∼3 logarithmic cycles. In the form of N-halamines >5 logarithmic cycles were reached. Microbial inactivation kinetics showed a Weibullian behavior when the coating was unchlorinated and a sigmoidal behavior when chlorinated. Microscopy confirmed that the reduction in the microbial load was due to biocidal effects of the coating and not bacterial adhesion onto the modified surface. The modified surface was able to be repeatedly rechlorinated. Such rechargeable antimicrobial coatings may support improving food safety by reducing cross-contamination of microorganisms from food-processing equipment.

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Section: Resultsmentioning

confidence: 80%

Antimicrobial Coatings with Dual Cationic and N-Halamine Character: Characterization and Biocidal Efficacy

Bastarrachea

Goddard

2015

J. Agric. Food Chem.

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“…However, the surface roughness of FLT-F, PIL-F, and C-RESS-F patterns has increased compared to FLT, PIL, and C-RESS surfaces. This is due to the formation of the flower petal nano-structures during the flame treatment process by the aggregation of the organosilicon compound in the PDMS matrix on the surface [ 35 , 36 , 37 , 38 ]. The formation of flower petal nano-structures on PDMS surfaces led to increasing pattern height (h) and RMS surface roughness, as shown in Table 1 .…”

Section: Discussionmentioning

confidence: 99%

“…The flower petal nano-structure on the PDMS surface was developed by surface modification using a simple flame treatment process, as shown in Figure 3 c and Figure 4 a,b [ 35 , 36 , 37 , 38 ]. This flower petal nano-structure behaves like a re-entrant micro-/nano-structure, exhibiting superhydrophobic and superoleophobic surfaces in the Cassie–Baxter state.…”

Section: Methodsmentioning

confidence: 99%

“…Moreover, nano−scale features are difficult to replicate on the PDMS surface to create the high surface roughness due to the limitation of resolution of the conventional lithography process to generate the nano−structure on a master template. Therefore, the hierarchy of micro−/nano−structures with additional flame treatment [35][36][37] is one of the promising methods to create the re−entrant micro−/nanostructures with nano−roughness on the PDMS surface due to its simplicity and cost−effectiveness. Using a simple flame treatment process, we have demonstrated the It is well-known that a superhydrophobic surface that mimics nature-inspired features can be fabricated by creating a rough surface consisting of a micro-or nano-structure on a low-surface-energy material [15,16].…”

Section: Introductionmentioning

confidence: 99%

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Enhancement of Bacterial Anti-Adhesion Properties on Robust PDMS Micro-Structure Using a Simple Flame Treatment Method

et al. 2022

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Biofilm−associated infections caused by an accumulation of micro−organisms and pathogens significantly impact the environment, health risks, and the global economy. Currently, a non−biocide−releasing superhydrophobic surface is a potential solution for antibacterial purposes. This research demonstrated a well−designed robust polydimethylsiloxane (PDMS) micro−structure and a flame treatment process with improved hydrophobicity and bacterial anti−adhesion properties. After the flame treatment at 700 ± 20 °C for 15 s, unique flower−petal re−entrant nano−structures were formed on pillars (PIL−F, width: 1.87 ± 0.30 μm, height: 7.76 ± 0.13 μm, aspect ratio (A.R.): 4.14) and circular rings with eight stripe supporters (C−RESS−F, width: 0.50 ± 0.04 μm, height: 3.55 ± 0.11 μm, A.R.: 7.10) PDMS micro−patterns. The water contact angle (WCA) and ethylene glycol contact angle (EGCA) of flame−treated flat−PDMS (FLT−F), PIL–F, and C–RESS−F patterns were (133.9 ± 3.8°, 128.6 ± 5.3°), (156.1 ± 1.5°, 151.5 ± 2.1°), and (146.3 ± 3.5°, 150.7 ± 1.8°), respectively. The Escherichia coli adhesion on the C−RESS−F micro−pattern with hydrophobicity and superoleophobicity was 42.6%, 31.8%, and 2.9% less than FLT−F, PIL−F, and Teflon surfaces. Therefore, the flame−treated C−RESS−F pattern is one of the promising bacterial anti−adhesion micro−structures in practical utilization for various applications.

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“…Various treatments such as irradiation with γ‐rays, UV, electron beam, and ozone have also been used. Surfaces have also been modified by flame, plasma, and corona treatments followed by grafting of polymers. Most of the functionalization procedures or reactions are performed under extreme conditions or generate radicals that can cause degradation of the polymer resulting in detrimental effects on the mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

Improving the antifouling properties of polypropylene surfaces by melt blending with polyethylene glycol diblock copolymers

Garle

White

Budhlall

2017

J of Applied Polymer Sci

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Protein-resistant polyethylene-block-poly(ethylene glycol) (PE-b-PEG) copolymers of different molecular weights at various concentrations were compounded by melt blending with polypropylene (PP) polymers in order to enhance their antifouling properties. Phase separation of the PE-b-PEG copolymer and its migration to the surface of the PP blend, was confirmed by attenuated total reflectance-Fourier transform infrared, X-ray photoelectron spectroscopy, and static water contact angle measurements. Enrichment of PEG chains at the surface of the blends increased with increasing PE-b-PEG copolymer concentration and molecular weight. The PP blends compounded with PE-b-PEG copolymer having the lowest molecular weight (875 g mol 21 ), at the lowest concentration (1 wt %), gave the lowest bovine serum protein adsorption (30% less) compared to that of neat PP. At higher concentrations (5 and 10 wt %), and higher molecular weights (920, 1400, and 2250 g mol 21 ), the PE-b-PEG copolymers leached-out resulting in protein adsorption comparable to that of neat PP.Polypropylene (PP) is a widely used material for biomedical applications due to its many desirable properties, including low cost, ease of processing, and sterilization. 13 It finds extensive use in the biomedical field 14 as filtration membranes, 15 textiles/fabrics, and medical implants such as surgical meshes 16,17 and vascular prostheses. 18 These applications necessitate extraordinary wettability and protein repellency. 19 Wettability results from hydrophilic functional groups binding or interacting via H-bonding to water (H 2 O) molecules, leading to the formation of a highly hydrated layer of H 2 O molecules surrounding the hydrophilic groups. This hydrated layer results in steric hindrance to any incoming protein molecules, preventing their adsorption. 20Additional Supporting Information may be found in the online version of this article.

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Mapping physicochemical surface modifications of flame-treated polypropylene

Cited by 15 publications

References 44 publications

Antimicrobial Coatings with Dual Cationic and N-Halamine Character: Characterization and Biocidal Efficacy

Antimicrobial Coatings with Dual Cationic and N-Halamine Character: Characterization and Biocidal Efficacy

Enhancement of Bacterial Anti-Adhesion Properties on Robust PDMS Micro-Structure Using a Simple Flame Treatment Method

Improving the antifouling properties of polypropylene surfaces by melt blending with polyethylene glycol diblock copolymers

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