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Zhang J, Zhao H. Synergistic Effects of the Superhydrophilic and Superhydrophobic Components on the Antifreezing Performances of Latex Particles and Anti-Icing Properties of Latex Films. Macromol Rapid Commun 2024; 45:e2400314. [PMID: 38885940 DOI: 10.1002/marc.202400314] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2024] [Revised: 06/12/2024] [Indexed: 06/20/2024]
Abstract
The development of new materials for antifreezing and anti-icing applications is a big challenge in industry and academic area. Inspired by the antifreeze proteins, latex particles with superhydrophilic zwitterionic shells and superhydrophobic cores are synthesized by reversible addition-fragmentation chain transfer emulsion polymerization, and the applications of the latex particles in antifreezing and anti-icing applications are investigated. In antifreezing study, the critical aggregate temperature (CAT) of the latex particles decreases, and the separation of the melting and freezing temperature of ice increases with the particle concentration. Enzyme molecules can be cryopreserved in the particle solution, and their bioactivities are well maintained. Latex particles are casted into latex films with dynamic surfaces. Anti-icing performances, including antifrosting properties, freezing delay time, and ice adhesion strengths, are studied; and the water-treated latex films present stronger anti-icing properties than other films, due to the synergistic effects of the superhydrophilic and superhydrophobic components. In addition, latex particles with zwitterionic shells and poly(n-butyl methacrylate) cores, and latex particles with small molecular surfactant on the surfaces are synthesized. The antifreezing performances of the latex particles and anti-icing properties of the latex films are compared.
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Affiliation(s)
- Jie Zhang
- Key Laboratory of Functional Polymer Materials, Ministry of Education, College of Chemistry, Nankai University, Tianjin, 300071, China
| | - Hanying Zhao
- Key Laboratory of Functional Polymer Materials, Ministry of Education, College of Chemistry, Nankai University, Tianjin, 300071, China
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2
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Lotito V, Zambelli T. Heat: A powerful tool for colloidal particle shaping. Adv Colloid Interface Sci 2024; 331:103240. [PMID: 39024831 DOI: 10.1016/j.cis.2024.103240] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2023] [Revised: 06/10/2024] [Accepted: 06/16/2024] [Indexed: 07/20/2024]
Abstract
Colloidal particles of spherical shape are important building blocks for nanotechnological applications. Materials with tailored physical properties can be directly synthesized from self-assembled particles, as is the case for colloidal photonic crystals. In addition, colloidal monolayers and multilayers can be exploited as a mask for the fabrication of complex nanostructures via a colloidal lithography process for applications ranging from optoelectronics to sensing. Several techniques have been adopted to modify the shape of both individual colloidal particles and colloidal masks. Thermal treatment of colloidal particles is an effective route to introduce colloidal particle deformation or to manipulate colloidal masks (i.e. to tune the size of the interstices between colloidal particles) by heating them at elevated temperatures above a certain critical temperature for the particle material. In particular, this type of morphological manipulation based on thermal treatments has been extensively applied to polymer particles. Nonetheless, interesting shaping effects have been observed also in inorganic materials, in particular silica particles. Due to their much less complex implementation and distinctive shaping effects in comparison to dry etching or high energy ion beam irradiation, thermal treatments turn out to be a powerful and competitive tool to induce colloidal particle deformation. In this review, we examine the physicochemical principles and mechanisms of heat-induced shaping as well as its experimental implementation. We also explore its applications, going from tailored masks for colloidal lithography to the fabrication of colloidal assemblies directly useful for their intrinsic optical, thermal and mechanical properties (e.g. thermal switches) and even to the synthesis of supraparticles and anisotropic particles, such as doublets.
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Affiliation(s)
- Valeria Lotito
- Laboratory of Biosensors and Bioelectronics, Institute for Biomedical Engineering, ETH Zurich, Gloriastrasse 35, 8092 Zurich, Switzerland.
| | - Tomaso Zambelli
- Laboratory of Biosensors and Bioelectronics, Institute for Biomedical Engineering, ETH Zurich, Gloriastrasse 35, 8092 Zurich, Switzerland.
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3
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Zhang J, Wang C, Zhao H. Dynamic surfaces of latex films and their antifouling applications. J Colloid Interface Sci 2024; 654:1281-1292. [PMID: 37907007 DOI: 10.1016/j.jcis.2023.10.138] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2023] [Revised: 10/02/2023] [Accepted: 10/25/2023] [Indexed: 11/02/2023]
Abstract
Latex polymer particles have been widely used in industry and everyday life. For decades the fabrication of "smart" latex film from latex particles has been a great challenge due to the difficulty in the synthesis of the functional latex particles by traditional emulsion polymerization using small molecular surfactants. In this manuscript, a simple and environmentally-friendly approach to the fabrication of "smart" latex films with dynamic surfaces is reported. Latex particles with poly(n-butyl methacrylate) (PnBMA) in the cores and zwitterionic poly-3-[dimethyl-[2-(2-methylprop-2-enoyloxy) ethyl]azaniumyl]propane-1-sulfonate (PDMAPS) in the shells are synthesized by reversible addition-fragmentation chain transfer (RAFT) mediated surfactant-free emulsion polymerization. The kinetics for the emulsion polymerization is studied, and the latex particles are analyzed by transmission electron microscopy (TEM), scanning electron microscopy (SEM) and dynamic light scattering (DLS). Latex films are prepared by casting aqueous solutions of the latex particles at temperatures above the glass transition temperature (Tg) of PnBMA. On the dried latex film, the hydrophobic PnBMA blocks occupy the top surface; after water treatment, the hydrophilic PDMAPS blocks migrate to the surface. A change in the surface hydrophilicity results in a change in the water contact angle of the latex film. A mechanism for the formation of the dynamic surface structure is proposed in this research. Antifouling applications of the latex films are investigated. Experimental results indicate that the water-treated latex film is able to efficiently inhibit protein adsorption and resist bacterial adhesion.
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Affiliation(s)
- Jie Zhang
- Key Laboratory of Functional Polymer Materials, Ministry of Education, College of Chemistry, Nankai University, PR China
| | - Chen Wang
- Key Laboratory of Functional Polymer Materials, Ministry of Education, College of Chemistry, Nankai University, PR China
| | - Hanying Zhao
- Key Laboratory of Functional Polymer Materials, Ministry of Education, College of Chemistry, Nankai University, PR China.
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4
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Jansen D, Ectors D, Kong X, Schmidtke C, Deschner F, Pakusch J, Jahns E, Neubauer J. Synchronous Monitoring of Cement Hydration and Polymer Film Formation Using 1H-Time-Domain-NMR with T 2 Time-Weighted T 1 Time Evaluation: A Nondestructive Practicable Benchtop Method. ACS OMEGA 2021; 6:7499-7511. [PMID: 33778262 PMCID: PMC7992089 DOI: 10.1021/acsomega.0c06010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/10/2020] [Accepted: 02/04/2021] [Indexed: 06/12/2023]
Abstract
The interactions between latex and cement are still not completely understood. In this work, we would like to address the temporal changes in cement hardening and latex film formation. For this reason, the hydration process and the film formation were simultaneously monitored. This scientific issue is even more challenging as a nondestructive quantitative analysis of the film formation process is not available yet. Here, we report on simultaneous monitoring of the latex film formation and the phase development in cementitious systems via 1H-time-domain-NMR for the first time. The obtained results were validated using classical analytical methods, such as in situ X-ray diffraction, X-ray fluorescence (Rietveld analysis), and confocal laser scanning microscopy.
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Affiliation(s)
- Daniel Jansen
- Mineralogy, GeoZentrum Nordbayern, Schlossgarten 5a, 91054 Erlangen, Germany
| | - Dominique Ectors
- Mineralogy, GeoZentrum Nordbayern, Schlossgarten 5a, 91054 Erlangen, Germany
| | - Xiangming Kong
- Department
of Civil Engineering, Tsinghua University, 100084, Haidian District, Beijing, China
| | - Christian Schmidtke
- BASF
Construction Additives, Dr.-Albert-Frank-Strasse 32, 83308 Trostberg, Germany
| | - Florian Deschner
- BASF
Construction Additives, Dr.-Albert-Frank-Strasse 32, 83308 Trostberg, Germany
| | - Joachim Pakusch
- BASF
SE, Carl-Bosch-Strasse
38, 67056 Ludwigshafen
am Rhein, Germany
| | - Ekkehard Jahns
- BASF
SE, Carl-Bosch-Strasse
38, 67056 Ludwigshafen
am Rhein, Germany
| | - Jürgen Neubauer
- Mineralogy, GeoZentrum Nordbayern, Schlossgarten 5a, 91054 Erlangen, Germany
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5
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Film formation process of natural rubber latex particles: roles of the particle size and distribution of non-rubber species on film microstructure. Colloids Surf A Physicochem Eng Asp 2020. [DOI: 10.1016/j.colsurfa.2020.124571] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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6
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Konko I, Guriyanova S, Boyko V, Sun L, Liu D, Reck B, Men Y. Role of the Hydrophilic Latex Particle Surface in Water Diffusion into Films from Waterborne Polymer Colloids. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:6075-6088. [PMID: 30991802 DOI: 10.1021/acs.langmuir.8b04327] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
The diffusion mechanism and growth of large-scale domains during the immersion of latex films in water have been thoroughly investigated with scattering techniques in a combination with the gravimetric method. Latex dispersions for film formation studies had identical main monomer compositions and only differ in the hydrophilic comonomers that result in distinct "hairy" layer structures of the particles. The major effects of the presence and the structure of the surface layers were identified: (1) Introducing the hydrophilic surface layer in the binder structure results in a more uniform penetration of water and a reduction in the water domain growth. (2) The nature of the particle shell defines the rate of the formation of the first hydration layer and the beginning of the large cluster formation. Poly(acrylamide) in the particle shell promotes the formation of the homogeneously swollen film and slows down the development of water "pockets." Poly(acrylic acid) leads to a more heterogeneous material and accelerates water uptake and cluster growth. (3) The thickness of the particle hairy layer regulates the thickness of the interstitials in the dry film and the number of the chemical groups involved in H-bonding with water molecules without a cluster formation. The amount of water that was absorbed before large domains start evolving increased with the growth of the particle shell thickness.
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Affiliation(s)
- Iuliia Konko
- State Key Laboratory of Polymer Physics and Chemistry , Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, University of Chinese Academy of Sciences , Renmin Street 5625 , 130022 Changchun , P. R. China
| | - Svetlana Guriyanova
- Advanced Materials & Systems Research, Material Physics and Analytics , BASF SE , 67056 Ludwigshafen , Germany
| | - Volodymyr Boyko
- Advanced Materials & Systems Research, Material Physics and Analytics , BASF SE , 67056 Ludwigshafen , Germany
| | - Lichao Sun
- Advanced Materials & Systems Research, Dispersions for Architectural Coatings and Adhesives , BASF Advanced Chemicals Co. , Jiangxinsha Road, 300 , 200137 Shanghai , P. R. China
| | - Dong Liu
- Key Laboratory of Neutron Physics and Institute of Nuclear Physics and Chemistry , China Academy of Engineering Physics (CAEP) , 621999 Mianyang , P. R. China
| | - Bernd Reck
- Advanced Materials & Systems Research Polymer Colloid Technology , BASF SE , 67056 Ludwigshafen am Rhein , Germany
| | - Yongfeng Men
- State Key Laboratory of Polymer Physics and Chemistry , Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, University of Chinese Academy of Sciences , Renmin Street 5625 , 130022 Changchun , P. R. China
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7
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Martín-Fabiani I, Makepeace DK, Richardson PG, Lesage de la Haye J, Venero DA, Rogers SE, D'Agosto F, Lansalot M, Keddie JL. In Situ Monitoring of Latex Film Formation by Small-Angle Neutron Scattering: Evolving Distributions of Hydrophilic Stabilizers in Drying Colloidal Films. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:3822-3831. [PMID: 30777761 DOI: 10.1021/acs.langmuir.8b04251] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
The distribution of hydrophilic species, such as surfactants, in latex films is of critical importance for the performance of adhesives, coatings, and inks, among others. However, the evolution of this distribution during the film formation process and in the resulting dried films remains insufficiently elucidated. Here, we present in situ (wet) and ex situ (dry) small-angle neutron scattering (SANS) experiments that follow the film formation of two types of latex particles, which differ in their stabilizer: either a covalently bonded poly(methacrylic acid) (PMAA) segment or a physically adsorbed surfactant (sodium dodecyl sulfate, SDS). By fitting the experimental SANS data and combining with gravimetry experiments, we have ascertained the hydrophilic species distribution within the drying film and followed its evolution by correlating the size and shape of stabilizer clusters with the drying time. The evolution of the SDS distribution over drying time is being driven by a reduction in the interfacial free energy. However, the PMAA-based stabilizer macromolecules are restricted by their covalent bonding to core polymer chains and hence form high-surface area disclike phases at the common boundary between particles and PMAA micelles. Contrary to an idealized view of film formation, PMAA does not remain in the walls of a continuous honeycomb structure. The results presented here shed new light on the nanoscale distribution of hydrophilic species in drying and ageing latex films. We provide valuable insights into the influence of the stabilizer mobility on the final structure of latex films.
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Affiliation(s)
- Ignacio Martín-Fabiani
- Department of Materials , Loughborough University , Loughborough LE11 3TU , Leicestershire , U.K
| | - David K Makepeace
- Department of Physics , University of Surrey , Guildford GU2 7XH , U.K
| | | | - Jennifer Lesage de la Haye
- Université Lyon, Université Claude Bernard Lyon 1, CPE Lyon, CNRS, UMR 5265, Chemistry, Catalysis, Polymers and Processes (C2P2) , 43 Bd du 11 Novembre 1918 , 69616 Villeurbanne , France
| | - Diego Alba Venero
- Science and Technology Facilities Council, Rutherford Appleton Laboratory , ISIS Pulsed Neutron and Muon Source , Harwell , Didcot, Oxford OX11 0QX , U.K
| | - Sarah E Rogers
- Science and Technology Facilities Council, Rutherford Appleton Laboratory , ISIS Pulsed Neutron and Muon Source , Harwell , Didcot, Oxford OX11 0QX , U.K
| | - Franck D'Agosto
- Université Lyon, Université Claude Bernard Lyon 1, CPE Lyon, CNRS, UMR 5265, Chemistry, Catalysis, Polymers and Processes (C2P2) , 43 Bd du 11 Novembre 1918 , 69616 Villeurbanne , France
| | - Muriel Lansalot
- Université Lyon, Université Claude Bernard Lyon 1, CPE Lyon, CNRS, UMR 5265, Chemistry, Catalysis, Polymers and Processes (C2P2) , 43 Bd du 11 Novembre 1918 , 69616 Villeurbanne , France
| | - Joseph L Keddie
- Department of Physics , University of Surrey , Guildford GU2 7XH , U.K
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8
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Zozulya AV, Zaluzhnyy IA, Mukharamova N, Lazarev S, Meijer JM, Kurta RP, Shabalin A, Sprung M, Petukhov AV, Vartanyants IA. Unravelling the structural rearrangement of polymer colloidal crystals under dry sintering conditions. SOFT MATTER 2018; 14:6849-6856. [PMID: 30095841 DOI: 10.1039/c8sm01412d] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The structural rearrangement of polystyrene colloidal crystals under dry sintering conditions has been revealed by in situ grazing incidence X-ray scattering. The measured diffraction patterns were analysed using distorted wave Born approximation (DWBA) theory and the structural parameters of the as-grown colloidal crystals of three different particle sizes were determined for the in-plane and out-of-plane directions in a film. By analysing the temperature evolution of the diffraction peak positions, integrated intensities, and widths, the detailed scenario of the structural rearrangement of crystalline domains at the nanoscale has been revealed, including thermal expansion, particle shape transformation and crystal amorphisation. Based on DWBA analysis, we demonstrate that in the process of dry sintering, the shape of colloidal particles in a crystal transforms from a sphere to a polyhedron. Our results deepen the understanding of the thermal annealing of polymer colloidal crystals as an efficient route for the design of new nano-materials.
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Affiliation(s)
| | - Ivan A Zaluzhnyy
- Deutsches Elektronen-Synchrotron DESY, Notkestraße 85, Hamburg D-22607, Germany and National Research Nuclear University MEPhI (Moscow Engineering Physics Institute), Kashirskoye ch. 31, Moscow 115409, Russia
| | | | - Sergey Lazarev
- Deutsches Elektronen-Synchrotron DESY, Notkestraße 85, Hamburg D-22607, Germany and National Research Tomsk Polytechnic University (TPU), Lenin Avenue 30, Tomsk 634050, Russia
| | - Janne-Mieke Meijer
- Van't Hoff Laboratory for Physical and Colloid Chemistry, Department of Chemistry and Debye Institute for Nanomaterials Science, Utrecht University, Padualaan 8, 3584 CH, The Netherlands
| | - Ruslan P Kurta
- European XFEL GmbH, Holzkoppel 4, Schenefeld D-22869, Germany.
| | - Anatoly Shabalin
- Deutsches Elektronen-Synchrotron DESY, Notkestraße 85, Hamburg D-22607, Germany
| | - Michael Sprung
- Deutsches Elektronen-Synchrotron DESY, Notkestraße 85, Hamburg D-22607, Germany
| | - Andrei V Petukhov
- Van't Hoff Laboratory for Physical and Colloid Chemistry, Department of Chemistry and Debye Institute for Nanomaterials Science, Utrecht University, Padualaan 8, 3584 CH, The Netherlands and Laboratory of Physical Chemistry, Department of Chemical Engineering and Chemistry and Institute for Complex Molecular Systems, Eindhoven University of Technology, P.O. Box 513, 5600 MB, Eindhoven, The Netherlands
| | - Ivan A Vartanyants
- Deutsches Elektronen-Synchrotron DESY, Notkestraße 85, Hamburg D-22607, Germany and National Research Nuclear University MEPhI (Moscow Engineering Physics Institute), Kashirskoye ch. 31, Moscow 115409, Russia
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9
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Nutz FA, Retsch M. Interfacial and volumetric sensitivity of the dry sintering process of polymer colloidal crystals: a thermal transport and photonic bandgap study. Phys Chem Chem Phys 2018; 19:16124-16130. [PMID: 28604861 DOI: 10.1039/c7cp01994g] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We introduce the in situ characterization of the dry sintering process of face-centred cubic colloidal crystals by two complementary techniques: thermal transport and photonic stopband characterization. Therefore, we employed time-dependent, isothermal laser flash analysis and specular reflectivity experiments close to the glass transition temperature of the colloidal crystal. Both methods yield distinctly different time constants of the film formation process. This discrepancy can be attributed to a volume- (photonic stopband) and interface-driven (thermal transport) sensitivity of the respective characterization method. Nevertheless, both methods yield comparable apparent activation energies. Finally, we extended the sintering process characterization to further polymer compositions, with vastly different glass transition temperatures. We could show that the film formation rate is governed by the viscoelastic properties of the polymers at the respective annealing temperature.
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Affiliation(s)
- Fabian A Nutz
- University of Bayreuth, Physical Chemistry - Polymer Systems, Universitaetsstr. 30, 95447 Bayreuth, Germany.
| | - Markus Retsch
- University of Bayreuth, Physical Chemistry - Polymer Systems, Universitaetsstr. 30, 95447 Bayreuth, Germany.
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10
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Nanospherical arabinogalactan proteins are a key component of the high-strength adhesive secreted by English ivy. Proc Natl Acad Sci U S A 2016; 113:E3193-202. [PMID: 27217558 DOI: 10.1073/pnas.1600406113] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Over 130 y have passed since Charles Darwin first discovered that the adventitious roots of English ivy (Hedera helix) exude a yellowish mucilage that promotes the capacity of this plant to climb vertical surfaces. Unfortunately, little progress has been made in elucidating the adhesion mechanisms underlying this high-strength adhesive. In the previous studies, spherical nanoparticles were observed in the viscous exudate. Here we show that these nanoparticles are predominantly composed of arabinogalactan proteins (AGPs), a superfamily of hydroxyproline-rich glycoproteins present in the extracellular spaces of plant cells. The spheroidal shape of the AGP-rich ivy nanoparticles results in a low viscosity of the ivy adhesive, and thus a favorable wetting behavior on the surface of substrates. Meanwhile, calcium-driven electrostatic interactions among carboxyl groups of the AGPs and the pectic acids give rise to the cross-linking of the exuded adhesive substances, favor subsequent curing (hardening) via formation of an adhesive film, and eventually promote the generation of mechanical interlocking between the adventitious roots of English ivy and the surface of substrates. Inspired by these molecular events, a reconstructed ivy-mimetic adhesive composite was developed by integrating purified AGP-rich ivy nanoparticles with pectic polysaccharides and calcium ions. Information gained from the subsequent tensile tests, in turn, substantiated the proposed adhesion mechanisms underlying the ivy-derived adhesive. Given that AGPs and pectic polysaccharides are also observed in bioadhesives exuded by other climbing plants, the adhesion mechanisms revealed by English ivy may forward the progress toward understanding the general principles underlying diverse botanic adhesives.
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11
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Sulyanova EA, Shabalin A, Zozulya AV, Meijer JM, Dzhigaev D, Gorobtsov O, Kurta RP, Lazarev S, Lorenz U, Singer A, Yefanov O, Zaluzhnyy I, Besedin I, Sprung M, Petukhov AV, Vartanyants IA. Structural evolution of colloidal crystal films in the process of melting revealed by Bragg peak analysis. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2015; 31:5274-83. [PMID: 25594683 DOI: 10.1021/la504652z] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
In situ X-ray diffraction studies of structural evolution of colloidal crystal films formed by polystyrene spherical particles upon incremental heating are reported. The Bragg peak parameters, such as peak position, integrated intensity, and radial and azimuthal widths were analyzed as a function of temperature. A quantitative study of colloidal crystal lattice distortions and mosaic spread as a function of temperature was carried out using Williamson-Hall plots based on mosaic block model. The temperature dependence of the diameter of polystyrene particles was obtained from the analysis of Bragg peaks, and the form factor contribution extracted from the diffraction patterns. Four stages of structural evolution in a colloidal crystal upon heating were identified. Based on this analysis, a model of the heating and melting process in the colloidal crystal film is suggested.
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Affiliation(s)
- Elena A Sulyanova
- †Deutsches Elektronen-Synchrotron DESY, Notkestraße 85, D-22607 Hamburg, Germany
- ‡Shubnikov Institute of Crystallography RAS, Leninskii pr. 59, 119333 Moscow, Russia
| | - Anatoly Shabalin
- †Deutsches Elektronen-Synchrotron DESY, Notkestraße 85, D-22607 Hamburg, Germany
| | - Alexey V Zozulya
- †Deutsches Elektronen-Synchrotron DESY, Notkestraße 85, D-22607 Hamburg, Germany
| | - Janne-Mieke Meijer
- §Van 't Hoff laboratory for Physical and Colloid Chemistry, Debye Institute for Nanomaterials Science, Utrecht University, Padualaan 8, 3508 TB Utrecht, The Netherlands
| | - Dmitry Dzhigaev
- †Deutsches Elektronen-Synchrotron DESY, Notkestraße 85, D-22607 Hamburg, Germany
- ∥National Research Nuclear University MEPhI (Moscow Engineering Physics Institute), Kashirskoye ch. 31, 115409 Moscow, Russia
| | - Oleg Gorobtsov
- †Deutsches Elektronen-Synchrotron DESY, Notkestraße 85, D-22607 Hamburg, Germany
- ⊥NRC Kurchatov Institute, Akademika Kurchatova pl. 1, 123182 Moscow, Russia
| | - Ruslan P Kurta
- #European XFEL GmbH, Albert-Einstein-Ring 19, D-22761 Hamburg, Germany
| | - Sergey Lazarev
- †Deutsches Elektronen-Synchrotron DESY, Notkestraße 85, D-22607 Hamburg, Germany
- ∇National Research Tomsk Polytechnic University (TPU), Lenina pr. 2a, 634028 Tomsk, Russia
| | - Ulf Lorenz
- ○Department of Chemistry, University of Potsdam, D-14476 Potsdam, Germany
| | - Andrej Singer
- ◆University of California San Diego, 9500 Gilman Dr., La Jolla, California 92093, United States
| | - Oleksandr Yefanov
- ¶Center for Free-Electron Laser Science, DESY, Notkestraße 85, D-22607 Hamburg, Germany
| | - Ivan Zaluzhnyy
- †Deutsches Elektronen-Synchrotron DESY, Notkestraße 85, D-22607 Hamburg, Germany
- ∥National Research Nuclear University MEPhI (Moscow Engineering Physics Institute), Kashirskoye ch. 31, 115409 Moscow, Russia
| | - Ilya Besedin
- †Deutsches Elektronen-Synchrotron DESY, Notkestraße 85, D-22607 Hamburg, Germany
- ∥National Research Nuclear University MEPhI (Moscow Engineering Physics Institute), Kashirskoye ch. 31, 115409 Moscow, Russia
| | - Michael Sprung
- †Deutsches Elektronen-Synchrotron DESY, Notkestraße 85, D-22607 Hamburg, Germany
| | - Andrei V Petukhov
- §Van 't Hoff laboratory for Physical and Colloid Chemistry, Debye Institute for Nanomaterials Science, Utrecht University, Padualaan 8, 3508 TB Utrecht, The Netherlands
| | - Ivan A Vartanyants
- †Deutsches Elektronen-Synchrotron DESY, Notkestraße 85, D-22607 Hamburg, Germany
- ∥National Research Nuclear University MEPhI (Moscow Engineering Physics Institute), Kashirskoye ch. 31, 115409 Moscow, Russia
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12
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Carter FT, Kowalczyk RM, Millichamp I, Chainey M, Keddie JL. Correlating particle deformation with water concentration profiles during latex film formation: reasons that softer latex films take longer to dry. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:9672-9681. [PMID: 25058916 DOI: 10.1021/la5023505] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
During the past two decades, an improved understanding of the operative particle deformation mechanisms during latex film formation has been gained. For a particular colloidal dispersion, the Routh-Russel deformation maps predict the dominant mechanism for particle deformation under a particular set of conditions (evaporation rate, temperature, and initial film thickness). Although qualitative tests of the Routh-Russel model have been reported previously, a systematic study of the relationship between the film-formation conditions and the resulting water concentration profiles is lacking. Here, the water distributions during the film formation of a series of acrylic copolymer latexes with varying glass-transition temperatures, Tg (values of -22, -11, 4, and 19 °C), have been obtained using GARField nuclear magnetic resonance profiling. A significant reduction in the rate of water loss from the latex copolymer with the lowest Tg was found, which is explained by its relatively low polymer viscosity enabling the growth of a coalesced skin layer. The set of processing parameters where the drying first becomes impeded occurs at the boundary between the capillary deformation and the wet sintering regimes of the Routh-Russel model, which provides strong confirmation of the model's validity. An inverse correlation between the model's dimensionless control parameter and the dimensionless drying time is discovered, which is useful for the design of fast-drying waterborne films.
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Affiliation(s)
- Farai T Carter
- Department of Physics, Faculty of Engineering and Physical Sciences, University of Surrey , Guildford, Surrey, GU2 7XH United Kingdom
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13
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Gonzalez E, Tollan C, Chuvilin A, Barandiaran MJ, Paulis M. Determination of the coalescence temperature of latexes by environmental scanning electron microscopy. ACS APPLIED MATERIALS & INTERFACES 2012; 4:4276-4282. [PMID: 22812417 DOI: 10.1021/am300971v] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
A new methodology for quantitative characterization of the coalescence process of waterborne polymer dispersion (latex) particles by environmental scanning electron microscopy (ESEM) is proposed. The experimental setup has been developed to provide reproducible latex monolayer depositions, optimized contrast of the latex particles, and a reliable readout of the sample temperature. Quantification of the coalescence process under dry conditions has been performed by image processing based on evaluation of the image autocorrelation function. As a proof of concept the coalescence of two latexes with known and differing glass transition temperatures has been measured. It has been shown that a reproducibility of better than 1.5 °C can be obtained for the measurement of the coalescence temperature.
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Affiliation(s)
- Edurne Gonzalez
- POLYMAT, University of the Basque Country UPV/EHU, Joxe Mari Korta zentroa, Avda. Tolosa 72, 20018 Donostia-San Sebastián, Spain
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14
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Herzog G, Abul Kashem MM, Benecke G, Buffet A, Gehrke R, Perlich J, Schwartzkopf M, Körstgens V, Meier R, Niedermeier MA, Rawolle M, Ruderer MA, Müller-Buschbaum P, Wurth W, Roth SV. Influence of nanoparticle surface functionalization on the thermal stability of colloidal polystyrene films. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:8230-8237. [PMID: 22519820 DOI: 10.1021/la3007348] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The installation of large scale colloidal nanoparticle thin films is of great interest in sensor technology or data storage. Often, such devices are operated at elevated temperatures. In the present study, we investigate the effect of heat treatment on the structure of colloidal thin films of polystyrene (PS) nanoparticles in situ by using the combination of grazing incidence small-angle X-ray scattering (GISAXS) and optical ellipsometry. In addition, the samples are investigated with optical microscopy, atomic force microscopy (AFM), and field emission scanning electron microscopy (FESEM). To install large scale coatings on silicon wafers, spin-coating of colloidal pure PS nanoparticles and carboxylated PS nanoparticles is used. Our results indicate that thermal annealing in the vicinity of the glass transition temperature T(g) of pure PS leads to a rapid loss in the ordering of the nanoparticles in spin-coated films. For carboxylated particles, this loss of order is shifted to a higher temperature, which can be useful for applications at elevated temperatures. Our model assumes a softening of the boundaries between the individual colloidal spheres, leading to strong changes in the nanostructure morphology. While the nanostructure changes drastically, the macroscopic morphology remains unaffected by annealing near T(g).
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Affiliation(s)
- Gerd Herzog
- HASYLAB at DESY, Notkestr. 85, D-22607 Hamburg, Germany.
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15
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Fischer S, Jiang Z, Men Y. Analysis of the Lamellar Structure of Semicrystalline Polymers by Direct Model Fitting of SAXS Patterns. J Phys Chem B 2011; 115:13803-8. [DOI: 10.1021/jp204998p] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Stefan Fischer
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Renmin Street 5625, Changchun, P.R. China, 130022, People’s Republic of China
| | - Zhiyong Jiang
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Renmin Street 5625, Changchun, P.R. China, 130022, People’s Republic of China
| | - Yongfeng Men
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Renmin Street 5625, Changchun, P.R. China, 130022, People’s Republic of China
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