Superhydrophobic functionalization of cutinase activated poly(lactic acid) surfaces

Ortner, Andreas; Pellis, Alessandro; Gamerith, Caroline; Yebra, Antonio Orcal; Scaini, Denis; Kaluzna, Iwona; Mink, D.; Wildeman, S. De; Acero, Enrique Herrero; Guebitz, Georg M.

doi:10.1039/c6gc03150a

Cited by 31 publications

(29 citation statements)

References 32 publications

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“…The tunable CA value and SA were closely related to the nely controlled surface morphology because the pristine PLA surface showed a CA of just 72 . 26 The difference in the CA and SA detected in the obtained PLA surfaces was ascribed mainly to the area variation in the nano-/microstructures (Fig. 3c-e).…”

Section: Ca and Sliding Angle (Sa) Of Watermentioning

confidence: 99%

Controllable domain morphology in coated poly(lactic acid) films for high-efficiency and high-precision transportation of water droplet arrays

et al. 2017

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Construction of superhydrophobic surfaces with tunable adhesion force has attracted considerable attention in past decades. Here, we demonstrated an exfoliated surface in non-solvent-coated poly(lactic acid) (PLA) films which exhibited controllable domain morphology containing "face-on", "edge-on" or "peak-on" nano-/micro-structures. A theoretical understanding revealed that such controllable morphology responded closely to the variation in mixture viscosities at a fixed temperature.Furthermore, the resulting films were highly superhydrophobic with contact angles >150. In particular, adhesion could be tuned ranging from 144 mN to 62 mN for face-on and peak-on surfaces, respectively, by changing the non-solvent content. This strategy allowed for high-efficiency and high-precision transportation of water microdroplets (1 mL) with a yield of #100% on homogeneous surfaces. This approach could aid no-mass-lost fluid transportation for a broad variety of applications in bioengineering and biochips.

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Section: Ca and Sliding Angle (Sa) Of Watermentioning

confidence: 99%

Controllable domain morphology in coated poly(lactic acid) films for high-efficiency and high-precision transportation of water droplet arrays

et al. 2017

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“…Due to the nontoxicity, robust mechanical properties and excellent biodegradability, polycaprolactone (PCL) and polylactide (PLA) become polymer candidates for superhydrophobic materials . Scaffaro et al prepared PCL 3D porous sponge by adding water‐soluble porogen agents (NaCl and poly[ethylene glycol]) for the selective absorption of oil from water .…”

Section: Introductionmentioning

confidence: 99%

Preparation of hierarchically structured PCL superhydrophobic membrane via alternate electrospinning/electrospraying techniques

Zhang

Wang

Zhang

et al. 2019

J Polym Sci B Polym Phys

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Superhydrophobic polycaprolactone (PCL) membranes with hierarchical structure were fabricated via alternate electrospinning/electrospraying techniques. Electrospun PCL/methyl silicone oil (PCL/MSO) nanofibers were employed as substrate. PCL/MSO‐PCL microspheres (PCL/MSO‐PCLMS) hierarchical membrane was prepared via electrosprayed PCLMS as an additional layer on the substrate. Field emission scanning electron microscopy images showed the formation of hierarchical PCL/MSO‐PCLMS membranes. Compared to pure PCL fibers substrate (120 ± 1.3°), the water contact angle (WCA) of MSO‐modified PCL membrane was 142 ± 0.7°. The most interesting observation was that the WCA of PCLMS without any modification could be achieved to 146 ± 2.8°. On this basis, PCL/MSO‐PCLMS hierarchical membrane possessed superhydrophobic surface with 150 ± 0.6° of WCA. The excellent surface roughness and air‐pocket capacity of hierarchical membranes would make the membranes more hydrophobic. The maximum oil (n‐hexane) adsorption capacity of PCL/MSO‐PCLMS membrane was 32.53 g g−1. Oil–water separation efficiencies of the superhydrophobic membranes were all higher than 99.93% after 10 cycles. The hierarchically structured PCL superhydrophobic membranes indicate the potential applications of environmentally friendly biopolymers as separation membranes. © 2019 Wiley Periodicals, Inc. J. Polym. Sci., Part B: Polym. Phys. 2019, 57, 421–430

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“…Enzymes have been demonstrated to be useful tools for processing of poly(lactic acid) (PLLA), currently the most important bio‐based polyester with a market volume of 180,000 tons per year (Ivanova et al, ; Pellis et al, ). Despite their obvious involvement in PLLA degradation in the environment and in the human body (Masaki et al, ), enzymes have been used for PLLA synthesis (Lassalle and Ferreira, ) and surface functionalization (Ortner et al, ; Pellis et al, , ). Especially for sensitive materials like PLLA, a mild enzymatic treatment can allow creation of new surface groups without altering the polymer bulk properties (Pellis et al, ).…”

Section: Introductionmentioning

confidence: 99%

Small cause, large effect: Structural characterization of cutinases from Thermobifida cellulosilytica

Ribitsch

Hromic

Zitzenbacher

et al. 2017

Biotech & Bioengineering

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We have investigated the structures of two native cutinases from Thermobifida cellulosilytica, namely Thc_Cut1 and Thc_Cut2 as well as of two variants, Thc_Cut2_DM (Thc_Cut2_ Arg29Asn_Ala30Val) and Thc_Cut2_TM (Thc_Cut2_Arg19Ser_Arg29Asn_Ala30Val). The four enzymes showed different activities towards the aliphatic polyester poly(lactic acid) (PLLA). The crystal structures of the four enzymes were successfully solved and in combination with Small Angle X-Ray Scattering (SAXS) the structural features responsible for the selectivity difference were elucidated. Analysis of the crystal structures did not indicate significant conformational differences among the different cutinases. However, the distinctive SAXS scattering data collected from the enzymes in solution indicated a remarkable surface charge difference. The difference in the electrostatic and hydrophobic surface properties could explain potential alternative binding modes of the four cutinases on PLLA explaining their distinct activities. Biotechnol. Bioeng. 2017;114: 2481-2488. © 2017 Wiley Periodicals, Inc.

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Superhydrophobic functionalization of cutinase activated poly(lactic acid) surfaces

Abstract: Controlled enzymatic hydrolysis of PLA surfaces, followed by ring opening of AKD, leads to superhydrophobic surfaces (WCA >150°).

Cited by 31 publications

References 32 publications

Controllable domain morphology in coated poly(lactic acid) films for high-efficiency and high-precision transportation of water droplet arrays

Controllable domain morphology in coated poly(lactic acid) films for high-efficiency and high-precision transportation of water droplet arrays

Preparation of hierarchically structured PCL superhydrophobic membrane via alternate electrospinning/electrospraying techniques

Small cause, large effect: Structural characterization of cutinases from Thermobifida cellulosilytica

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