1
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Qian Q, Furner CT, Li CY. Crystallization of Poly(l-lactic acid) on Water Surfaces via Controlled Solvent Evaporation and Langmuir-Blodgett Films. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40:6285-6294. [PMID: 38478723 DOI: 10.1021/acs.langmuir.3c03788] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/27/2024]
Abstract
Solvent evaporation is one of the most fundamental processes in soft matter. Structures formed via solvent evaporation are often complex yet tunable via the competition between solute diffusion and solvent evaporation time scales. This work concerns the polymer evaporative crystallization on the water surface (ECWS). The dynamic and two-dimensional (2D) nature of the water surface offers a unique way to control the crystallization pathway of polymeric materials. Using poly(l-lactic acid) (PLLA) as the model polymer, we demonstrate that both one-dimensional (1D) crystalline filaments and two-dimensional (2D) lamellae are formed via ECWS, in stark contrast to the 2D Langmuir-Blodgett monolayer systems as well as polymer solution crystallization. Results show that this filament-lamella biphasic structure is tunable via chemical structures such as molecular weight and processing conditions such as temperature and evaporation rate.
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Affiliation(s)
- Qian Qian
- Department of Materials Science and Engineering, Drexel University, Philadelphia, Pennsylvania 19104, United States
| | - Carl T Furner
- Department of Materials Science and Engineering, Drexel University, Philadelphia, Pennsylvania 19104, United States
| | - Christopher Y Li
- Department of Materials Science and Engineering, Drexel University, Philadelphia, Pennsylvania 19104, United States
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2
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Nagarajan S, Woo EM. Sluggish growth of poly(ε-caprolactone) leads to petal-shaped aggregates packed with thick-stack lamellar bundles. CrystEngComm 2021. [DOI: 10.1039/d1ce00507c] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Kinetically sluggish growth of poly(ε-caprolactone) leads to peculiar camellia-petal-like bands on top, where a stereo-dissection demonstrates interior self-assembled lamellae being periodically grating-structured.
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Affiliation(s)
- Selvaraj Nagarajan
- Department of Chemical Engineering
- National Cheng Kung University
- Tainan
- Taiwan
| | - Eamor M. Woo
- Department of Chemical Engineering
- National Cheng Kung University
- Tainan
- Taiwan
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3
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Das A, Noack S, Schlaad H, Reiter G, Reiter R. Exploring Pathways to Equilibrate Langmuir Polymer Films. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:8184-8192. [PMID: 32569470 DOI: 10.1021/acs.langmuir.0c01268] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Focusing on the phase-coexistence region in Langmuir films of poly(l-lactide), we investigated changes in nonequilibrated morphologies and the corresponding features of the isotherms induced by different experimental pathways of lateral compression and expansion. In this coexistence region, the surface pressure Π was larger than the expected equilibrium value and was found to increase upon compression, i.e., exhibited a nonhorizontal plateau. As shown earlier by using microscopic techniques [Langmuir 2019, 35, 6129-6136], in this plateau region, well-ordered mesoscopic clusters coexisted with a surrounding matrix phase. We succeeded in reducing Π either by slowing down the rate of compression or through increasing the waiting time after stopping the movement of the barriers, which allowed for relaxations in the coexistence region. Intriguingly, the most significant pressure reduction was observed when recompressing a film that had already been compressed and expanded, if the recompression was started from an area value smaller than the one anticipated for the onset of the coexistence region. This observation suggests a "self-seeding" behavior, i.e., pre-existing nuclei allowed to circumvent the nucleation step. The decrease in Π was accompanied by a transformation of the initially formed metastable mesoscopic clusters into a thermodynamically favored filamentary morphology. Our results demonstrate that it is practically impossible to obtain fully equilibrated coexisting phases in a Langmuir polymer film, neither under conditions of extremely slow continuous compression nor for long waiting times at a constant area in the coexistence region which allow for reorganization.
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Affiliation(s)
- Abhijna Das
- Institute of Physics, University of Freiburg, Hermann-Herder-Str. 3, Freiburg 79104, Germany
- Freiburg Center for Interactive Materials and Bioinspired Technologies (FIT), University of Freiburg, Georges-Köhler-Allee 105, Freiburg 79110, Germany
| | - Sebastian Noack
- Institute of Chemistry, University of Potsdam, Karl-Liebknecht Str. 24-25, Potsdam 14476, Germany
| | - Helmut Schlaad
- Institute of Chemistry, University of Potsdam, Karl-Liebknecht Str. 24-25, Potsdam 14476, Germany
| | - Günter Reiter
- Institute of Physics, University of Freiburg, Hermann-Herder-Str. 3, Freiburg 79104, Germany
- Freiburg Center for Interactive Materials and Bioinspired Technologies (FIT), University of Freiburg, Georges-Köhler-Allee 105, Freiburg 79110, Germany
| | - Renate Reiter
- Institute of Physics, University of Freiburg, Hermann-Herder-Str. 3, Freiburg 79104, Germany
- Freiburg Center for Interactive Materials and Bioinspired Technologies (FIT), University of Freiburg, Georges-Köhler-Allee 105, Freiburg 79110, Germany
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4
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Hasan N, Fuchs C, Schwieger C, Busse K, Dolynchuk O, Kressler J. Crystallization of poly(ε-caprolactone) at the air-water interface studied by IRRAS and GI-WAXS. POLYMER 2020. [DOI: 10.1016/j.polymer.2020.122468] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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5
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Phase behavior of poly(ε-caprolactone)-b-poly(tert-butyl acrylate) block copolymer at the air/water interface. Colloids Surf A Physicochem Eng Asp 2020. [DOI: 10.1016/j.colsurfa.2019.124346] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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6
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Fundamental insights in PLGA degradation from thin film studies. J Control Release 2019; 319:276-284. [PMID: 31884098 DOI: 10.1016/j.jconrel.2019.12.044] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2019] [Revised: 12/20/2019] [Accepted: 12/26/2019] [Indexed: 01/18/2023]
Abstract
Poly(lactide-co-glycolide)s are commercially available degradable implant materials, which are typically selected based on specifications given by the manufacturer, one of which is their molecular weight. Here, we address the question whether variations in the chain length and their distribution affect the degradation behavior of Poly[(rac-lactide)-co-glycolide]s (PDLLGA). The hydrolysis was studied in ultrathin films at the air-water interface in order to rule out any morphological effects. We found that both for purely hydrolytic degradation as well as under enzymatic catalysis, the molecular weight has very little effect on the overall degradation kinetics of PDLLGAs. The quantitative analysis suggested a random scission mechanism. The monolayer experiments showed that an acidic micro-pH does not accelerate the degradation of PDLLGAs, in contrast to alkaline conditions. The degradation experiments were combined with interfacial rheology measurements, which showed a drastic decrease of the viscosity at little mass loss. The extrapolated molecular weight behaved similar to the viscosity, dropping to a value near to the solubility limit of PDLLGA oligomers before mass loss set in. This observation suggests a solubility controlled degradation of PDLLGA. Conclusively, the molecular weight affects the degradation of PDLLGA devices mostly in indirect ways, e.g. by determining their morphology and porosity during fabrication. Our study demonstrates the relevance of the presented Langmuir degradation method for the design of controlled release systems.
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7
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Das A, El-Tawargy AS, Khechine E, Noack S, Schlaad H, Reiter G, Reiter R. Controlling Nucleation in Quasi-Two-Dimensional Langmuir Poly(l-lactide) Films through Variation of the Rate of Compression. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:6129-6136. [PMID: 30998851 DOI: 10.1021/acs.langmuir.9b00619] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
We studied morphological changes in a quasi-two-dimensional Langmuir film of low molar mass poly(l-lactide) upon increasing the surface density, starting from randomly distributed molecules to a homogeneous monolayer of closely packed molecules, followed by nucleation and growth of mesoscopic, three-dimensional clusters from an overcompressed monolayer. The corresponding nucleation density of mesoscopic clusters within the monolayer can be tailored through variation of the rate of compression. For a given surface density and temperature, the nucleation probability was found to increase linearly with the rate of compression, allowing to adjust the density of mesoscopic clusters over nearly 2 orders of magnitude.
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Affiliation(s)
- Abhijna Das
- Institute of Physics , University of Freiburg , Hermann-Herder-Str. 3 , Freiburg 79104 , Germany
- Freiburg Center for Interactive Materials and Bioinspired Technologies (FIT) , University of Freiburg , Georges-Köhler-Allee 105 , Freiburg 79110 , Germany
| | - Ahmed S El-Tawargy
- Department of Physics, Faculty of Science , Damietta University , El-Kafrawy Street , Damietta 34517 , Egypt
| | - Emna Khechine
- Institute of Physics , University of Freiburg , Hermann-Herder-Str. 3 , Freiburg 79104 , Germany
- Freiburg Center for Interactive Materials and Bioinspired Technologies (FIT) , University of Freiburg , Georges-Köhler-Allee 105 , Freiburg 79110 , Germany
| | - Sebastian Noack
- Institute of Chemistry , University of Potsdam , Karl-Liebknecht-Str. 24-25 , Potsdam 14476 , Germany
| | - Helmut Schlaad
- Institute of Chemistry , University of Potsdam , Karl-Liebknecht-Str. 24-25 , Potsdam 14476 , Germany
| | - Günter Reiter
- Institute of Physics , University of Freiburg , Hermann-Herder-Str. 3 , Freiburg 79104 , Germany
- Freiburg Center for Interactive Materials and Bioinspired Technologies (FIT) , University of Freiburg , Georges-Köhler-Allee 105 , Freiburg 79110 , Germany
| | - Renate Reiter
- Institute of Physics , University of Freiburg , Hermann-Herder-Str. 3 , Freiburg 79104 , Germany
- Freiburg Center for Interactive Materials and Bioinspired Technologies (FIT) , University of Freiburg , Georges-Köhler-Allee 105 , Freiburg 79110 , Germany
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8
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Saretia S, Machatschek R, Schulz B, Lendlein A. Reversible 2D networks of oligo(
ε
-caprolactone) at the air–water interface. Biomed Mater 2019; 14:034103. [DOI: 10.1088/1748-605x/ab0cef] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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9
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Affiliation(s)
- Mark C. Staub
- Department of Materials Science and Engineering Drexel University Philadelphia Pennsylvania
| | - Christopher Y. Li
- Department of Materials Science and Engineering Drexel University Philadelphia Pennsylvania
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10
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Machatschek R, Schulz B, Lendlein A. Langmuir Monolayers as Tools to Study Biodegradable Polymer Implant Materials. Macromol Rapid Commun 2018; 40:e1800611. [PMID: 30387219 DOI: 10.1002/marc.201800611] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2018] [Revised: 09/24/2018] [Indexed: 11/06/2022]
Abstract
Langmuir monolayers provide a fast and elegant route to analyze the degradation behavior of biodegradable polymer materials. In contrast to bulk materials, diffusive transport of reactants and reaction products in the (partially degraded) material can be neglected at the air-water interface, allowing for the study of molecular degradation kinetics in experiments taking less than a day and in some cases just a few minutes, in contrast to experiments with bulk materials that can take years. Several aspects of the biodegradation behavior of polymer materials, such as the interaction with biomolecules and degradation products, are directly observable. Expanding the technique with surface-sensitive instrumental techniques enables evaluating the evolution of the morphology, chemical composition, and the mechanical properties of the degrading material in situ. The potential of the Langmuir monolayer degradation technique as a predictive tool for implant degradation when combined with computational methods is outlined, and related open questions and strategies to overcome these challenges are pointed out.
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Affiliation(s)
- Rainhard Machatschek
- Institute of Biomaterial Science and Berlin-Brandenburg Center for Regenerative Therapies, Helmholtz-Zentrum Geesthacht, Kantstraße 55,, 14513, Teltow, Germany
| | - Burkhard Schulz
- Institute of Biomaterial Science and Berlin-Brandenburg Center for Regenerative Therapies, Helmholtz-Zentrum Geesthacht, Kantstraße 55,, 14513, Teltow, Germany.,Institute of Chemistry, University of Potsdam, Karl-Liebknecht-Straße 24-25,, 14469, Potsdam, Germany
| | - Andreas Lendlein
- Institute of Biomaterial Science and Berlin-Brandenburg Center for Regenerative Therapies, Helmholtz-Zentrum Geesthacht, Kantstraße 55,, 14513, Teltow, Germany.,Institute of Chemistry, University of Potsdam, Karl-Liebknecht-Straße 24-25,, 14469, Potsdam, Germany
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11
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Schöne AC, Roch T, Schulz B, Lendlein A. Evaluating polymeric biomaterial-environment interfaces by Langmuir monolayer techniques. J R Soc Interface 2017; 14:20161028. [PMID: 28468918 PMCID: PMC5454283 DOI: 10.1098/rsif.2016.1028] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2016] [Accepted: 04/05/2017] [Indexed: 12/18/2022] Open
Abstract
Polymeric biomaterials are of specific relevance in medical and pharmaceutical applications due to their wide range of tailorable properties and functionalities. The knowledge about interactions of biomaterials with their biological environment is of crucial importance for developing highly sophisticated medical devices. To achieve optimal in vivo performance, a description at the molecular level is required to gain better understanding about the surface of synthetic materials for tailoring their properties. This is still challenging and requires the comprehensive characterization of morphological structures, polymer chain arrangements and degradation behaviour. The review discusses selected aspects for evaluating polymeric biomaterial-environment interfaces by Langmuir monolayer methods as powerful techniques for studying interfacial properties, such as morphological and degradation processes. The combination of spectroscopic, microscopic and scattering methods with the Langmuir techniques adapted to polymers can substantially improve the understanding of their in vivo behaviour.
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Affiliation(s)
- Anne-Christin Schöne
- Institute of Chemistry, University of Potsdam, Karl-Liebknecht-Strasse 24-25, 14476 Potsdam, Germany
- Institute of Biomaterial Science and Berlin-Brandenburg Centre for Regenerative Therapies (BCRT), Helmholtz-Zentrum Geesthacht, Kantstrasse 55, 14513 Teltow, Germany
| | - Toralf Roch
- Institute of Biomaterial Science and Berlin-Brandenburg Centre for Regenerative Therapies (BCRT), Helmholtz-Zentrum Geesthacht, Kantstrasse 55, 14513 Teltow, Germany
- Helmholtz Virtual Institute-Multifunctional Biomaterials for Medicine, Kantstrasse 55, 14513 Teltow, Germany
| | - Burkhard Schulz
- Institute of Chemistry, University of Potsdam, Karl-Liebknecht-Strasse 24-25, 14476 Potsdam, Germany
- Institute of Biomaterial Science and Berlin-Brandenburg Centre for Regenerative Therapies (BCRT), Helmholtz-Zentrum Geesthacht, Kantstrasse 55, 14513 Teltow, Germany
| | - Andreas Lendlein
- Institute of Chemistry, University of Potsdam, Karl-Liebknecht-Strasse 24-25, 14476 Potsdam, Germany
- Institute of Biomaterial Science and Berlin-Brandenburg Centre for Regenerative Therapies (BCRT), Helmholtz-Zentrum Geesthacht, Kantstrasse 55, 14513 Teltow, Germany
- Helmholtz Virtual Institute-Multifunctional Biomaterials for Medicine, Kantstrasse 55, 14513 Teltow, Germany
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12
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Roßberg J, Rottke FO, Schulz B, Lendlein A. Enzymatic Degradation of Oligo(ε-caprolactone)s End-Capped with Phenylboronic Acid Derivatives at the Air-Water Interface. Macromol Rapid Commun 2016; 37:1966-1971. [PMID: 27762464 DOI: 10.1002/marc.201600471] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2016] [Revised: 09/29/2016] [Indexed: 11/09/2022]
Abstract
The influence of terminal functionalization of oligo(ε-caprolactone)s (OCL) with phenylboronic acid pinacol ester or phenylboronic acid on the enzymatic degradation behavior at the air-water interface is investigated by the Langmuir monolayer degradation technique. While the unsubstituted OCL immediately degrades after injection of the enzyme lipase from Pseudomonas cepacia, enzyme molecules are incorporated into the films based on end-capped OCL before degradation. This incorporation of enzymes does not inhibit or suppress the film degradation, but retards it significantly. A specific binding of lipase to the polymer monolayer allows studying the enzymatic activity of bound proteins and the influence on the degradation process. The functionalization of a macromolecule with phenyl boronic acid groups is an approach to investigate their interactions with diol-containing biomolecules like sugars and to monitor their specified impact on the enzymatic degradation behavior at the air-water interface.
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Affiliation(s)
- Joana Roßberg
- Institute of Chemistry, University of Potsdam, Karl-Liebknecht-Str. 24-25, 14476, Potsdam, Germany.,Institute of Biomaterial Science and Berlin-Brandenburg Centre for Regenerative Therapies, Helmholtz-Zentrum Geesthacht, Kantstr. 55, 14513, Teltow, Germany
| | - Falko O Rottke
- Institute of Chemistry, University of Potsdam, Karl-Liebknecht-Str. 24-25, 14476, Potsdam, Germany.,Institute of Biomaterial Science and Berlin-Brandenburg Centre for Regenerative Therapies, Helmholtz-Zentrum Geesthacht, Kantstr. 55, 14513, Teltow, Germany
| | - Burkhard Schulz
- Institute of Chemistry, University of Potsdam, Karl-Liebknecht-Str. 24-25, 14476, Potsdam, Germany.,Institute of Biomaterial Science and Berlin-Brandenburg Centre for Regenerative Therapies, Helmholtz-Zentrum Geesthacht, Kantstr. 55, 14513, Teltow, Germany
| | - Andreas Lendlein
- Institute of Chemistry, University of Potsdam, Karl-Liebknecht-Str. 24-25, 14476, Potsdam, Germany.,Institute of Biomaterial Science and Berlin-Brandenburg Centre for Regenerative Therapies, Helmholtz-Zentrum Geesthacht, Kantstr. 55, 14513, Teltow, Germany
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13
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Schöne AC, Kratz K, Schulz B, Reiche J, Santer S, Lendlein A. Surface pressure-induced isothermal 2D- to 3D-transitions in Langmuir films of poly(ε-caprolactone)s and oligo(ε-caprolactone) based polyesterurethanes. POLYM ADVAN TECHNOL 2015. [DOI: 10.1002/pat.3638] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Anne-Christin Schöne
- Institute of Chemistry; University of Potsdam; Karl-Liebknecht-Str. 24-25 14476 Potsdam Germany
- Institute of Biomaterial Science; Helmholtz-Zentrum Geesthacht; Kantstr. 55 14513 Teltow Germany
| | - Karl Kratz
- Institute of Biomaterial Science; Helmholtz-Zentrum Geesthacht; Kantstr. 55 14513 Teltow Germany
| | - Burkhard Schulz
- Institute of Chemistry; University of Potsdam; Karl-Liebknecht-Str. 24-25 14476 Potsdam Germany
- Institute of Biomaterial Science; Helmholtz-Zentrum Geesthacht; Kantstr. 55 14513 Teltow Germany
| | - Jürgen Reiche
- Institute of Physics and Astronomy; University of Potsdam; Karl-Liebknecht-Str. 24-25 14476 Potsdam Germany
| | - Svetlana Santer
- Institute of Physics and Astronomy; University of Potsdam; Karl-Liebknecht-Str. 24-25 14476 Potsdam Germany
| | - Andreas Lendlein
- Institute of Chemistry; University of Potsdam; Karl-Liebknecht-Str. 24-25 14476 Potsdam Germany
- Institute of Biomaterial Science; Helmholtz-Zentrum Geesthacht; Kantstr. 55 14513 Teltow Germany
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14
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Schöne AC, Richau K, Kratz K, Schulz B, Lendlein A. Influence of Diurethane Linkers on the Langmuir Layer Behavior of Oligo[(rac-lactide)-co
-glycolide]-based Polyesterurethanes. Macromol Rapid Commun 2015; 36:1910-1915. [DOI: 10.1002/marc.201500316] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2015] [Revised: 08/03/2015] [Indexed: 12/16/2022]
Affiliation(s)
- Anne-Christin Schöne
- Institute of Biomaterial Science; Helmholtz-Zentrum Geesthacht; Kantstr. 55 14513 Teltow Germany
- Institute of Chemistry; University of Potsdam; Karl-Liebknecht-Straße 24-25 14476 Potsdam Germany
| | - Klaus Richau
- Institute of Biomaterial Science; Helmholtz-Zentrum Geesthacht; Kantstr. 55 14513 Teltow Germany
| | - Karl Kratz
- Institute of Biomaterial Science; Helmholtz-Zentrum Geesthacht; Kantstr. 55 14513 Teltow Germany
| | - Burkhard Schulz
- Institute of Biomaterial Science; Helmholtz-Zentrum Geesthacht; Kantstr. 55 14513 Teltow Germany
- Institute of Chemistry; University of Potsdam; Karl-Liebknecht-Straße 24-25 14476 Potsdam Germany
| | - Andreas Lendlein
- Institute of Biomaterial Science; Helmholtz-Zentrum Geesthacht; Kantstr. 55 14513 Teltow Germany
- Institute of Chemistry; University of Potsdam; Karl-Liebknecht-Straße 24-25 14476 Potsdam Germany
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15
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Wang W, Huang Z, Laird ED, Wang S, Li CY. Single-walled carbon nanotube nanoring induces polymer crystallization at liquid/liquid interface. POLYMER 2015. [DOI: 10.1016/j.polymer.2014.12.063] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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16
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Schöne AC, Schulz B, Richau K, Kratz K, Lendlein A. Characterization of Langmuir Films Prepared from Copolyesterurethanes Based on Oligo(ω-pentadecalactone) and Oligo(ε-caprolactone) Segments. MACROMOL CHEM PHYS 2014. [DOI: 10.1002/macp.201400377] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Anne-Christin Schöne
- Institute of Biomaterial Science and Berlin-Brandenburg; Center for Regenerative Therapies (BCRT); Helmholtz-Zentrum Geesthacht; Kantstraße 55 14513 Teltow Germany
- University of Potsdam, Institute of Chemistry; Karl-Liebknecht-Str. 24-25 14476 Potsdam Germany
| | - Burkhard Schulz
- Institute of Biomaterial Science and Berlin-Brandenburg; Center for Regenerative Therapies (BCRT); Helmholtz-Zentrum Geesthacht; Kantstraße 55 14513 Teltow Germany
- University of Potsdam, Institute of Chemistry; Karl-Liebknecht-Str. 24-25 14476 Potsdam Germany
| | - Klaus Richau
- Institute of Biomaterial Science and Berlin-Brandenburg; Center for Regenerative Therapies (BCRT); Helmholtz-Zentrum Geesthacht; Kantstraße 55 14513 Teltow Germany
| | - Karl Kratz
- Institute of Biomaterial Science and Berlin-Brandenburg; Center for Regenerative Therapies (BCRT); Helmholtz-Zentrum Geesthacht; Kantstraße 55 14513 Teltow Germany
| | - Andreas Lendlein
- Institute of Biomaterial Science and Berlin-Brandenburg; Center for Regenerative Therapies (BCRT); Helmholtz-Zentrum Geesthacht; Kantstraße 55 14513 Teltow Germany
- University of Potsdam, Institute of Chemistry; Karl-Liebknecht-Str. 24-25 14476 Potsdam Germany
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17
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Qi H, Wang W, Li CY. Janus Polymer Single Crystal Nanosheet via Evaporative Crystallization. ACS Macro Lett 2014; 3:675-678. [PMID: 35590767 DOI: 10.1021/mz5002806] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
We show that liquid/liquid interface can guide polymer chain folding during crystallization. Evaporation-induced crystallization of telechelic dicarboxyl end-functionalized poly(ε-caprolactone) (COOH-PCL-COOH) at a water/pentyl acetate interface produced millimeter-scale, uniform polymer single crystal (PSC) films. Due to the asymmetric nature at the interface, the PSC nanosheets exhibited a Janus structure: the two surfaces of the crystal showed distinct water contact angle, which are quantitatively confirmed by in situ nanocondensation using environmental scanning electron microscopy (ESEM).
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Affiliation(s)
- Hao Qi
- Department of Materials Science
and Engineering, Drexel University, Philadelphia, Pennsylvania 19104, United States
| | - Wenda Wang
- Department of Materials Science
and Engineering, Drexel University, Philadelphia, Pennsylvania 19104, United States
| | - Christopher Y. Li
- Department of Materials Science
and Engineering, Drexel University, Philadelphia, Pennsylvania 19104, United States
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18
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Naolou T, Busse K, Lechner BD, Kressler J. The behavior of poly( ε $$ \boldsymbol{\upvarepsilon} $$ -caprolactone) and poly(ethylene oxide)-b-poly( ε $$ \boldsymbol{\upvarepsilon} $$ -caprolactone) grafted to a poly(glycerol adipate) backbone at the air/water interface. Colloid Polym Sci 2014. [DOI: 10.1007/s00396-014-3168-1] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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19
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Paczesny J, Gregorowicz J, Nikiforov K. Phase transitions in monolayer formed by hyperbranched polyester with alkyl-terminated branches at the air/water interface. POLYMER 2013. [DOI: 10.1016/j.polymer.2012.11.014] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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20
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Zhang G, Cao Y, Jin L, Zheng P, Van Horn RM, Lotz B, Cheng SZ, Wang W. Crystal growth pattern changes in low molecular weight poly(ethylene oxide) ultrathin films. POLYMER 2011. [DOI: 10.1016/j.polymer.2011.01.002] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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21
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Semi-crystalline poly(ε-caprolactone) brushes on gold substrate via “grafting from” method: New insights with AFM characterization. Eur Polym J 2011. [DOI: 10.1016/j.eurpolymj.2010.04.022] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Zheng Y, Bruening ML, Baker GL. Crystallization kinetics of polymer brushes with poly(ethylene oxide) side chains. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/polb.22073] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Macromolecular effect on crystal pattern formation in ultra-thin films: Molecular segregation in a binary blend of PEO fractions. POLYMER 2009. [DOI: 10.1016/j.polymer.2009.10.041] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Wang H, Keum JK, Hiltner A, Baer E, Freeman B, Rozanski A, Galeski A. Confined crystallization of polyethylene oxide in nanolayer assemblies. Science 2009; 323:757-60. [PMID: 19197057 DOI: 10.1126/science.1164601] [Citation(s) in RCA: 242] [Impact Index Per Article: 16.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
The design and fabrication of ultrathin polymer layers are of increasing importance because of the rapid development of nanoscience and nanotechnology. Confined, two-dimensional crystallization of polymers presents challenges and opportunities due to the long-chain, covalently bonded nature of the macromolecule. Using an innovative layer-multiplying coextrusion process to obtain assemblies with thousands of polymer nanolayers, we discovered a morphology that emerges as confined polyethylene oxide (PEO) layers are made progressively thinner. When the thickness is confined to 20 nanometers, the PEO crystallizes as single, high-aspect-ratio lamellae that resemble single crystals. Unexpectedly, the crystallization habit imparts two orders of magnitude reduction in the gas permeability.
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Affiliation(s)
- Haopeng Wang
- Department of Macromolecular Science and Engineering, Case Western Reserve University, Cleveland, OH 44106-7202, USA
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Zhang G, Jin L, Ma Z, Zhai X, Yang M, Zheng P, Wang W, Wegner G. Dendritic-to-faceted crystal pattern transition of ultrathin poly(ethylene oxide) films. J Chem Phys 2008; 129:224708. [DOI: 10.1063/1.3037229] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Broniatowski M, Vila Romeu N, Dynarowicz-Łątka P. Study of the collapse mechanism of selected fluorinated surfactants. J Colloid Interface Sci 2008; 325:464-71. [DOI: 10.1016/j.jcis.2008.05.053] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2008] [Revised: 05/27/2008] [Accepted: 05/29/2008] [Indexed: 11/16/2022]
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Li B, Marand H, Esker AR. Dendritic growth of poly(ɛ-caprolactone) crystals from compatible blends with poly(t-butyl acrylate) at the air/water interface. ACTA ACUST UNITED AC 2007. [DOI: 10.1002/polb.21328] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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