1
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Kawamoto T, Minato H, Suzuki D. Relationship between π- A isotherms and single microgel/microgel array structures revealed via the direct visualization of microgels at the air/water interface. SOFT MATTER 2024; 20:5836-5847. [PMID: 39007355 DOI: 10.1039/d4sm00640b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/16/2024]
Abstract
The structures of single microgels and microgel arrays formed at the air/water interface were visualized directly, and their structures correlated with π-A isotherms in order to understand the compression behavior of soft and deformable microgels at this interface. Large microgels (ca. 4 μm) were synthesized so that these can be clearly visualized at the air/water interface, even under high compression, and a series of microgel compression experiments were directly evaluated using a Langmuir trough equipped with a fluorescence microscope. The experiments revealed that upon compressing the microgel arrays at the interface voids disappeared and colloidal crystallinity increased. However, the colloidal crystallinity decreased when the microgel arrays were strongly compressed. In addition, when the structures were observed at higher magnification, it became clear that the single microgel structures, when visualized from above, changed from circular to polygonal upon compressing the microgel array. The results of this study can be expected to improve the understanding of the compression behavior of microgel arrays adsorbed at the air/water interface and will thus be useful for the creation of new functional microgel stabilizers with potential applications in e.g., bubbles and emulsions.
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Affiliation(s)
- Takahisa Kawamoto
- Graduate School of Environmental, Life, Natural Science and Technology, Okayama University, 3-1-1 Tsushimanaka, Kita-ku, Okayama, 700-8530, Japan.
- Graduate School of Textile Science & Technology, Shinshu University, 3-15-1 Tokida, Ueda, Nagano 386-8567, Japan
| | - Haruka Minato
- Graduate School of Environmental, Life, Natural Science and Technology, Okayama University, 3-1-1 Tsushimanaka, Kita-ku, Okayama, 700-8530, Japan.
- Graduate School of Textile Science & Technology, Shinshu University, 3-15-1 Tokida, Ueda, Nagano 386-8567, Japan
| | - Daisuke Suzuki
- Graduate School of Environmental, Life, Natural Science and Technology, Okayama University, 3-1-1 Tsushimanaka, Kita-ku, Okayama, 700-8530, Japan.
- Graduate School of Textile Science & Technology, Shinshu University, 3-15-1 Tokida, Ueda, Nagano 386-8567, Japan
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2
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Otten M, Hildebrandt M, Pfeffing B, Voigt VC, Scheffold F, Hellweg T, Karg M. Volume Phase Transition of Thermoresponsive Microgels Scrutinized by Dynamic Light Scattering and Turbidity: Correlations Depend on Microgel Homogeneity. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40:14515-14526. [PMID: 38951962 DOI: 10.1021/acs.langmuir.4c01344] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/03/2024]
Abstract
Thermoresponsive microgels experience a volume phase transition triggered by temperature changes, a phenomenon often analyzed using dynamic light scattering to observe overall size alterations via the diffusion coefficient. However, local structural changes are typically assessed using more intricate and expensive techniques like small-angle neutron or X-ray scattering. In our research, we investigate the volume phase transition of poly-N-isopropylacrylamide (PNIPAM)-based microgels by employing a combination of temperature-dependent dynamic light scattering and simpler, faster, and more efficient attenuation measurements. We utilize attenuation at a fixed wavelength as a direct measure of dispersion turbidity, linking the absolute changes in hydrodynamic radius to the absolute changes in turbidity. This approach allows us to compare "classical" PNIPAM microgels from precipitation polymerization, charged copolymer microgels from precipitation copolymerization, and core-shell microgels from seeded precipitation polymerization. Our study includes a systematic analysis and comparison of 30 different microgels. By directly comparing data from dynamic light scattering and attenuation spectroscopy, we gain insights into structural heterogeneity and deviations from the established fuzzy sphere morphology. Furthermore, we demonstrate how turbidity data can be converted to swelling curves.
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Affiliation(s)
- Marius Otten
- Institut für Physikalische Chemie I: Kolloide und Nanooptik, Heinrich-Heine-Universität Düsseldorf, Universitätsstr. 1, 40225 Düsseldorf, Germany
| | - Marco Hildebrandt
- Institut für Physikalische Chemie I: Kolloide und Nanooptik, Heinrich-Heine-Universität Düsseldorf, Universitätsstr. 1, 40225 Düsseldorf, Germany
| | - Ben Pfeffing
- Institut für Physikalische Chemie I: Kolloide und Nanooptik, Heinrich-Heine-Universität Düsseldorf, Universitätsstr. 1, 40225 Düsseldorf, Germany
| | - Victoria Carina Voigt
- Institut für Physikalische Chemie I: Kolloide und Nanooptik, Heinrich-Heine-Universität Düsseldorf, Universitätsstr. 1, 40225 Düsseldorf, Germany
| | - Frank Scheffold
- Department of Physics, University of Fribourg, Chem. Du Musée, 1700 Fribourg, Switzerland
| | - Thomas Hellweg
- Fakultät für Chemie, Physikalische und Biophysikalische Chemie, Universität Bielefeld, Universitätsstr. 25, 33615 Bielefeld, Germany
| | - Matthias Karg
- Institut für Physikalische Chemie I: Kolloide und Nanooptik, Heinrich-Heine-Universität Düsseldorf, Universitätsstr. 1, 40225 Düsseldorf, Germany
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3
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Sun Y, Men Y, Liu S, Wang X, Li C. Liquid crystalline elastomer self-oscillating fiber actuators fabricated from soft tubular molds. SOFT MATTER 2024; 20:4246-4256. [PMID: 38747973 DOI: 10.1039/d4sm00134f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2024]
Abstract
The self-oscillation of objects that perform continuous and periodic motions upon unchanging and constant stimuli is highly important for intelligent actuators, advanced robotics, and biomedical machines. Liquid crystalline elastomer (LCE) materials are superior to traditional stimuli-responsive polymeric materials in the development of self-oscillators because of their reversible, large and anisotropic shape-changing ability, fast response ability and versatile structural design. In addition, fiber-shaped oscillators have attracted much interest due to their agility, flexibility and diverse oscillation modes. Herein, we present a strategy for fabricating fiber-shaped LCE self-oscillators using soft tubes as molds. Through the settlement of different configuration states of the soft tubes, the prepared fiber-shaped LCE oscillators can perform continuous rotational self-oscillation or up-and-down shifting self-oscillation under constant light stimuli, which are realized by photoinduced repetitive self-winding motion and self-waving motion, respectively. The mechanism of self-oscillating movements is attributed to the local temperature oscillation of LCE fibers caused by repetitive self-shadowing effects. LCE self-oscillators can operate stably over many oscillating cycles without obvious performance attenuation, revealing good robustness. Our work offers a versatile way by which LCE self-oscillators can be conveniently designed and fabricated in bulk and at low cost, and broadens the road for developing self-oscillating materials for biological robotics and health care machines.
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Affiliation(s)
- Yuying Sun
- Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education of the People's Republic of China, Heilongjiang University, Harbin 150080, P. R. China.
| | - Yanli Men
- Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education of the People's Republic of China, Heilongjiang University, Harbin 150080, P. R. China.
| | - Shiyu Liu
- Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education of the People's Republic of China, Heilongjiang University, Harbin 150080, P. R. China.
| | - Xiuxiu Wang
- Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education of the People's Republic of China, Heilongjiang University, Harbin 150080, P. R. China.
| | - Chensha Li
- Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education of the People's Republic of China, Heilongjiang University, Harbin 150080, P. R. China.
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4
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Tian R, Su S, Yu Y, Liang S, Ma C, Jiao Y, Xing W, Tian Z, Jiang T, Wang J. Revolutionizing osteoarthritis treatment: How mesenchymal stem cells hold the key. Biomed Pharmacother 2024; 173:116458. [PMID: 38503241 DOI: 10.1016/j.biopha.2024.116458] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2024] [Revised: 03/11/2024] [Accepted: 03/15/2024] [Indexed: 03/21/2024] Open
Abstract
Osteoarthritis (OA) is a multifaceted disease characterized by imbalances in extracellular matrix metabolism, chondrocyte and synoviocyte senescence, as well as inflammatory responses mediated by macrophages. Although there have been notable advancements in pharmacological and surgical interventions, achieving complete remission of OA remains a formidable challenge, oftentimes accompanied by significant side effects. Mesenchymal stem cells (MSCs) have emerged as a promising avenue for OA treatment, given their ability to differentiate into chondrocytes and facilitate cartilage repair, thereby mitigating the impact of an inflammatory microenvironment induced by macrophages. This comprehensive review aims to provide a concise overview of the diverse roles played by MSCs in the treatment of OA, while elucidating the underlying mechanisms behind these contributions. Specifically, the roles include: (a) Promotion of chondrocyte and synoviocyte regeneration; (b) Inhibition of extracellular matrix degradation; (c) Attenuating the macrophage-induced inflammatory microenvironment; (d) Alleviation of pain. Understanding the multifaceted roles played by MSCs in OA treatment is paramount for developing novel therapeutic strategies. By harnessing the regenerative potential and immunomodulatory properties of MSCs, it may be possible to devise more effective and safer approaches for managing OA. Further research and clinical studies are warranted to optimize the utilization of MSCs and realize their full potential in the field of OA therapeutics.
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Affiliation(s)
- Ruijiao Tian
- Key Laboratory of Brain Science Research & Transformation in Tropical Environment of Hainan Province, Hainan Medical University, Haikou 571199, China
| | - Shibo Su
- Engineering Research Center for Hainan Bio-Smart Materials and Bio-Medical Devices, Key Laboratory of Emergency and Trauma, Ministry of Education, Key Laboratory of Hainan Functional Materials and Molecular Imaging, College of Emergency and Trauma, Hainan Medical University, Haikou 571199, China; Key Laboratory of Hainan Trauma and Disaster Rescue, The First Affiliated Hospital of Hainan Medical University, Hainan Medical University, Haikou 571199, China; School of Basic Medicine and Life Sciences, Hainan Medical University, Haikou 571199, China
| | - Yang Yu
- Department of Gastroenterology, The First Affiliated Hospital of Jinzhou Medical University, Jinzhou, Liaoning 121000, China
| | - Siqiang Liang
- Zhongke Comprehensive Medical Transformation Center Research Institute (Hainan) Co., Ltd, Haikou 571199, China
| | - Chuqing Ma
- The Second Clinical College, Hainan Medical University, Haikou 571199, China
| | - Yang Jiao
- Department of Biomedical Engineering, Faculty of Engineering, The Hong Kong Polytechnic University, Hong Kong, China
| | - Weihong Xing
- Key Laboratory of Brain Science Research & Transformation in Tropical Environment of Hainan Province, Hainan Medical University, Haikou 571199, China
| | - Ziheng Tian
- School of Clinical Medicine, Jining Medical University, Jining 272002, China
| | - Tongmeng Jiang
- Engineering Research Center for Hainan Bio-Smart Materials and Bio-Medical Devices, Key Laboratory of Emergency and Trauma, Ministry of Education, Key Laboratory of Hainan Functional Materials and Molecular Imaging, College of Emergency and Trauma, Hainan Medical University, Haikou 571199, China; Key Laboratory of Hainan Trauma and Disaster Rescue, The First Affiliated Hospital of Hainan Medical University, Hainan Medical University, Haikou 571199, China.
| | - Juan Wang
- Key Laboratory of Brain Science Research & Transformation in Tropical Environment of Hainan Province, Hainan Medical University, Haikou 571199, China; Engineering Research Center for Hainan Bio-Smart Materials and Bio-Medical Devices, Key Laboratory of Emergency and Trauma, Ministry of Education, Key Laboratory of Hainan Functional Materials and Molecular Imaging, College of Emergency and Trauma, Hainan Medical University, Haikou 571199, China; School of Basic Medicine and Life Sciences, Hainan Medical University, Haikou 571199, China.
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5
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Minato H, Ushida S, Yokouchi K, Suzuki D. Multi-layer core/shell microgels with internal complexity and their nanocomposites. Chem Commun (Camb) 2024; 60:1630-1633. [PMID: 38234227 DOI: 10.1039/d3cc05579e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2024]
Abstract
In this study, we show that core/shell (CS) microgels with multiple layers can be created via a one-pot precipitation polymerization, in which monomers are added to the reaction flask multiple times once most of the previous monomer has been consumed. The complex internal structures of the microgels were examined using a combination of scattering and microscopy techniques.
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Affiliation(s)
- Haruka Minato
- Graduate School of Textile Science & Technology, Shinshu University, 3-15-1 Tokida, Ueda, Nagano 386-8567, Japan.
| | - Satoki Ushida
- Graduate School of Textile Science & Technology, Shinshu University, 3-15-1 Tokida, Ueda, Nagano 386-8567, Japan.
| | - Kentaro Yokouchi
- Graduate School of Textile Science & Technology, Shinshu University, 3-15-1 Tokida, Ueda, Nagano 386-8567, Japan.
| | - Daisuke Suzuki
- Graduate School of Textile Science & Technology, Shinshu University, 3-15-1 Tokida, Ueda, Nagano 386-8567, Japan.
- Research Initiative for Supra-Materials, Interdisciplinary Cluster for Cutting Edge Research, Shinshu University, 3-15-1 Tokida, Ueda, Nagano 386-8567, Japan
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6
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Kawamoto T, Yanagi K, Nishizawa Y, Minato H, Suzuki D. The compression of deformed microgels at an air/water interface. Chem Commun (Camb) 2023; 59:13289-13292. [PMID: 37830179 DOI: 10.1039/d3cc03425a] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2023]
Abstract
The compression of deformed hydrogel microspheres (microgels) at air/water interfaces was investigated using a Langmuir-Blodgett trough with simultaneous in situ visualization of the process using a fluorescent microscope. The relationship between the structure of the microgel arrays and the compression behavior was clarified using microgels with different degrees of crosslinking.
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Affiliation(s)
- Takahisa Kawamoto
- Graduate School of Textile Science & Technology, Shinshu University, 3-15-1 Tokida, Ueda, Nagano 386-8567, Japan
| | - Kohei Yanagi
- Graduate School of Textile Science & Technology, Shinshu University, 3-15-1 Tokida, Ueda, Nagano 386-8567, Japan
| | - Yuichiro Nishizawa
- Graduate School of Textile Science & Technology, Shinshu University, 3-15-1 Tokida, Ueda, Nagano 386-8567, Japan
| | - Haruka Minato
- Graduate School of Textile Science & Technology, Shinshu University, 3-15-1 Tokida, Ueda, Nagano 386-8567, Japan
| | - Daisuke Suzuki
- Graduate School of Textile Science & Technology, Shinshu University, 3-15-1 Tokida, Ueda, Nagano 386-8567, Japan
- Research Initiative for Supra-Materials, Interdisciplinary Cluster for Cutting Edge Research, Shinshu University, 3-15-1 Tokida, Ueda, Nagano 386-8567, Japan.
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7
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Sasaki Y, Nishizawa Y, Watanabe T, Kureha T, Uenishi K, Nakazono K, Takata T, Suzuki D. Nanoparticle-Based Tough Polymers with Crack-Propagation Resistance. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023. [PMID: 37327130 DOI: 10.1021/acs.langmuir.3c01226] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Although thin elastomer films of polymer nanoparticles are regarded as environmentally friendly materials, the low mechanical strength of the films limits their use in various applications. In the present study, we investigated the fracture resistance of latex films composed of acrylic nanoparticles where a small quantity of a rotaxane crosslinker was introduced. In contrast to conventional nanoparticle-based elastomers, the latex films composed of the rotaxane-crosslinked nanoparticles exhibited unusual crack propagation behavior; the direction of crack propagation changed from a direction parallel to the crack to one perpendicular to the crack, resulting in an increase in tear resistance. These findings will help to broaden the scope of design of new types of tough polymers composed of environmentally friendly polymer nanoparticles.
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Affiliation(s)
- Yuma Sasaki
- Graduate School of Textile Science & Technology, Shinshu University, 3-15-1 Tokida, Ueda, Nagano 386-8567, Japan
| | - Yuichiro Nishizawa
- Graduate School of Textile Science & Technology, Shinshu University, 3-15-1 Tokida, Ueda, Nagano 386-8567, Japan
| | - Takumi Watanabe
- Graduate School of Textile Science & Technology, Shinshu University, 3-15-1 Tokida, Ueda, Nagano 386-8567, Japan
| | - Takuma Kureha
- Department of Frontier Materials Chemistry, Graduate School of Science and Technology, Hirosaki University, 3 Bunkyo-cho, Hirosaki 036-8561, Japan
| | - Kazuya Uenishi
- Yokohama Rubber Co., Ltd., 2-1 Oiwake, Hiratsuka, Kanagawa 254-8601, Japan
| | - Kazuko Nakazono
- Department of Chemical Science and Engineering, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama, Kanagawa 226-8503, Japan
| | - Toshikazu Takata
- Department of Chemical Science and Engineering, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama, Kanagawa 226-8503, Japan
- Graduate School of Advanced Science and Engineering, Hiroshima University, 1-4-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8527, Japan
| | - Daisuke Suzuki
- Graduate School of Textile Science & Technology, Shinshu University, 3-15-1 Tokida, Ueda, Nagano 386-8567, Japan
- Research Initiative for Supra-Materials, Interdisciplinary Cluster for Cutting Edge Research, Shinshu University, 3-15-1 Tokida, Ueda, Nagano 386-8567, Japan
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8
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Walkowiak JJ, van Duijnhoven C, Boeschen P, Wolter NA, Michalska-Walkowiak J, Dulle M, Pich A. Multicompartment polymeric colloids from functional precursor Microgel: Synthesis in continuous process. J Colloid Interface Sci 2023; 634:243-254. [PMID: 36535162 DOI: 10.1016/j.jcis.2022.12.044] [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: 10/12/2022] [Revised: 11/25/2022] [Accepted: 12/10/2022] [Indexed: 12/15/2022]
Abstract
Raspberry-like poly(oligoethylene methacrylate-b-N-vinylcaprolactam)/polystyrene (POEGMA-b-PVCL/PS) patchy particles (PPs) and complex colloidal particle clusters (CCPCs) were fabricated in two-, and one-step (cascade) flow process. Surfactant-free, photo-initiated reversible addition-fragmentation transfer (RAFT) precipitation polymerization (Photo-RPP) was used to develop internally cross-linked POEGMA-b-PVCL microgels with narrow size distribution. Resulting microgel particles were then used to stabilize styrene seed droplets in water, producing raspberry-like PPs. In the cascade process, different hydrophobicity between microgel and PS induced the self-assembly of the first formed raspberry particles that then polymerized continuously in a Pickering emulsion to form the CCPCs. The internal structure as well as the surface morphology of PPs and CCPCs were studied as a function of polymerization conditions such as flow rate/retention time (Rt), temperature and the amount of used cross-linker. By performing Photo-RPP in tubular flow reactor we were able to gained advantages over heat dissipation and homogeneous light distribution in relation to thermally-, and photo-initiated bulk polymerizations. Tubular reactor also enabled detailed studies over morphological evolution of formed particles as a function of flow rate/Rt.
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Affiliation(s)
- Jacek J Walkowiak
- DWI - Leibniz-Institute for Interactive Materials e.V, Forckenbeckstraße 50, 52074 Aachen, Germany; Institute of Technical and Macromolecular Chemistry, RWTH Aachen University, Worringerweg 2, 52074 Aachen, Germany; Aachen-Maastricht Institute for Biobased Materials (AMIBM), Maastricht University, Urmonderbaan 22, 6167 RD Geleen, The Netherlands.
| | - Casper van Duijnhoven
- Zuyd University of Applied Sciences, Nieuw Eyckholt 300, 6419 DJ Heerlen, The Netherlands.
| | - Pia Boeschen
- Aachen-Maastricht Institute for Biobased Materials (AMIBM), Maastricht University, Urmonderbaan 22, 6167 RD Geleen, The Netherlands.
| | - Nadja A Wolter
- DWI - Leibniz-Institute for Interactive Materials e.V, Forckenbeckstraße 50, 52074 Aachen, Germany; Institute of Technical and Macromolecular Chemistry, RWTH Aachen University, Worringerweg 2, 52074 Aachen, Germany.
| | - Joanna Michalska-Walkowiak
- Jülich Centre for Neutron Science (JCNS-1), Forschungszentrum Jülich GmbH, Wilhelm-Johnen-Straβe, 52428 Jülich, Germany; CNRS, UMR 8232 - IPCM - Institut Parisien de Chimie Moléculaire - Polymer Chemistry Team, Sorbonne Université, 4 Pl. Jussieu, 75005 Paris, France.
| | - Martin Dulle
- Jülich Centre for Neutron Science (JCNS-1), Forschungszentrum Jülich GmbH, Wilhelm-Johnen-Straβe, 52428 Jülich, Germany.
| | - Andrij Pich
- DWI - Leibniz-Institute for Interactive Materials e.V, Forckenbeckstraße 50, 52074 Aachen, Germany; Institute of Technical and Macromolecular Chemistry, RWTH Aachen University, Worringerweg 2, 52074 Aachen, Germany; Aachen-Maastricht Institute for Biobased Materials (AMIBM), Maastricht University, Urmonderbaan 22, 6167 RD Geleen, The Netherlands.
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9
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Nishizawa Y, Inui T, Namioka R, Uchihashi T, Watanabe T, Suzuki D. Clarification of Surface Deswelling of Thermoresponsive Microgels by Electrophoresis. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:16084-16093. [PMID: 36441944 DOI: 10.1021/acs.langmuir.2c02742] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Although many investigations of thermoresponsive microgels have been reported, their surface properties, which are crucial in colloid science, are still not fully understood. In this study, microgels with surface-localized charged groups were synthesized by precipitation polymerization, and their electrophoretic behaviors were analyzed using a modified version of Ohshima's equation to obtain two surface properties of the soft particles: the softness parameter and the surface charge density. This systematic evaluation allows us to discuss the thermoresponsiveness of the overall microgels and their surfaces separately. Furthermore, the validity of the surface properties obtained from electrophoresis was verified by comparing them with the results of seeded emulsion polymerization in the presence of the microgels and the force-indentation curves obtained via high-speed atomic force microscopy (HS-AFM).
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Affiliation(s)
- Yuichiro Nishizawa
- Graduate School of Textile Science & Technology, Shinshu University, 3-15-1 Tokida, Ueda, Nagano386-8567, Japan
| | - Takumi Inui
- Graduate School of Textile Science & Technology, Shinshu University, 3-15-1 Tokida, Ueda, Nagano386-8567, Japan
| | - Ryuji Namioka
- Graduate School of Textile Science & Technology, Shinshu University, 3-15-1 Tokida, Ueda, Nagano386-8567, Japan
| | - Takayuki Uchihashi
- Department of Physics and Structural Biology Research Center, Graduate School of Science, Nagoya University, Furo-cho, Chiksusa-ku, Nagoya, Aichi464-8602, Japan
- Exploratory Research Center on Life and Living Systems, National Institutes of Natural Science, 5-1 Higashiyama, Myodaiji, Okazaki, Aichi444-8787, Japan
| | - Takumi Watanabe
- Graduate School of Textile Science & Technology, Shinshu University, 3-15-1 Tokida, Ueda, Nagano386-8567, Japan
| | - Daisuke Suzuki
- Graduate School of Textile Science & Technology, Shinshu University, 3-15-1 Tokida, Ueda, Nagano386-8567, Japan
- Research Initiative for Supra-Materials, Interdisciplinary Cluster for Cutting Edge Research, Shinshu University, 3-15-1 Tokida, Ueda, Nagano386-8567, Japan
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10
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Belamkar A, Harris A, Zukerman R, Siesky B, Oddone F, Verticchio Vercellin A, Ciulla TA. Sustained release glaucoma therapies: Novel modalities for overcoming key treatment barriers associated with topical medications. Ann Med 2022; 54:343-358. [PMID: 35076329 PMCID: PMC8794062 DOI: 10.1080/07853890.2021.1955146] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
Glaucoma is a progressive optic neuropathy and a leading cause of irreversible blindness. The disease has conventionally been characterized by an elevated intraocular pressure (IOP); however, recent research has built the consensus that glaucoma is not only dependent on IOP but rather represents a multifactorial optic neuropathy. Although many risk factors have been identified ranging from demographics to co-morbidities to ocular structural predispositions, IOP is currently the only modifiable risk factor, most often treated by topical IOP-lowering medications. However, topical hypotensive regimens are prone to non-adherence and are largely inefficient, leading to disease progression in spite of treatment. As a result, several companies are developing sustained release (SR) drug delivery systems as alternatives to topical delivery to potentially overcome these barriers. Currently, Bimatoprost SR (DurystaTM) from Allergan plc is the only FDA-approved SR therapy for POAG. Other SR therapies under investigation include: bimatoprost ocular ring (Allergan) (ClinicalTrials.gov identifier: NCT01915940), iDose® (Glaukos Corporation) (NCT03519386), ENV515 (Envisia Therapeutics) (NCT02371746), OTX-TP (Ocular Therapeutix) (NCT02914509), OTX-TIC (Ocular Therapeutix) (NCT04060144), and latanoprost free acid SR (PolyActiva) (NCT04060758). Additionally, a wide variety of technologies for SR therapeutics are under investigation including ocular surface drug delivery systems such as contact lenses and nanotechnology. While challenges remain for SR drug delivery technology in POAG management, this technology may shift treatment paradigms and dramatically improve outcomes.
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Affiliation(s)
- Aditya Belamkar
- Indiana University School of Medicine, Indianapolis, IN, USA
| | - Alon Harris
- Department of Opthalmology, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Ryan Zukerman
- Department of Opthalmology, Icahn School of Medicine at Mount Sinai, New York, NY, USA.,Department of Opthalmology, University of Miami Miller School of Medicine, Miami, FL, USA
| | - Brent Siesky
- Department of Opthalmology, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | | | | | - Thomas A Ciulla
- Indiana University School of Medicine, Indianapolis, IN, USA.,Vitreoretinal Medicine and Surgery, Midwest Eye Institute, Indianapolis, IN, USA
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11
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Kumar N, Ghosh B, Kumar A, Koley R, Dhara S, Chattopadhyay S. Multilayered “SMART” hydrogel systems for on-site drug delivery applications. J Drug Deliv Sci Technol 2022. [DOI: 10.1016/j.jddst.2022.104111] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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12
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Cross-linked bio-based hydrogels generated from solutions derived from the deconstruction of sisal fibers. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.120876] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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13
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Seeto WJ, Tian Y, Pradhan S, Minond D, Lipke EA. Droplet Microfluidics-Based Fabrication of Monodisperse Poly(ethylene glycol)-Fibrinogen Breast Cancer Microspheres for Automated Drug Screening Applications. ACS Biomater Sci Eng 2022; 8:3831-3841. [PMID: 35969206 PMCID: PMC9472798 DOI: 10.1021/acsbiomaterials.2c00285] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2022] [Accepted: 07/11/2022] [Indexed: 01/03/2023]
Abstract
Spheroidal cancer microtissues are highly advantageous for a wide range of biomedical applications, including high-throughput drug screening, multiplexed target validation, mechanistic investigation of tumor-extracellular matrix (ECM) interactions, among others. Current techniques for spheroidal tissue formation rely heavily on self-aggregation of single cancer cells and have substantial limitations in terms of cell-type-specific heterogeneities, uniformity, ease of production and handling, and most importantly, mimicking the complex native tumor microenvironmental conditions in simplistic models. These constraints can be overcome by using engineered tunable hydrogels that closely mimic the tumor ECM and elucidate pathologically relevant cell behavior, coupled with microfluidics-based high-throughput fabrication technologies to encapsulate cells and create cancer microtissues. In this study, we employ biosynthetic hybrid hydrogels composed of poly(ethylene glycol diacrylate) (PEGDA) covalently conjugated to natural protein (fibrinogen) (PEG-fibrinogen, PF) to create monodisperse microspheres encapsulating breast cancer cells for 3D culture and tumorigenic characterization. A previously developed droplet-based microfluidic system is used for rapid, facile, and reproducible fabrication of uniform cancer microspheres with either MCF7 or MDA-MB-231 (metastatic) breast cancer cells. Cancer cell-type-dependent variations in cell viability, metabolic activity, and 3D morphology, as well as microsphere stiffness, are quantified over time. Particularly, MCF7 cells grew as tight cellular clusters in the PF microspheres, characteristic of their epithelial morphology, while MDA-MB-231 cells displayed elongated and invasive morphology, characteristic of their mesenchymal and metastatic nature. Finally, the translational potential of the cancer microsphere platform toward high-throughput drug screening is also demonstrated. With high uniformity, scalability, and control over engineered microenvironments, the established cancer microsphere model can be potentially used for mechanistic studies, fabrication of modular cancer microtissues, and future drug-testing applications.
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Affiliation(s)
- Wen J. Seeto
- Department
of Chemical Engineering, Auburn University, Auburn, Alabama 36849, United States
| | - Yuan Tian
- Department
of Chemical Engineering, Auburn University, Auburn, Alabama 36849, United States
| | - Shantanu Pradhan
- Department
of Chemical Engineering, Auburn University, Auburn, Alabama 36849, United States
| | - Dmitriy Minond
- College
of Pharmacy, Department of Pharmaceutical Sciences, Nova Southeastern University, Lauderdale, Florida 33314, United States
- Rumbaugh-Goodwin
Institute for Cancer Research, Nova Southeastern
University, Lauderdale, Florida 33314, United States
| | - Elizabeth A. Lipke
- Department
of Chemical Engineering, Auburn University, Auburn, Alabama 36849, United States
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14
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Preparation of poly (acrylic acid) microgels by alcohol type cross-linkers and a comparison with other cross-linking methods. Polym Bull (Berl) 2022. [DOI: 10.1007/s00289-021-03878-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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15
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Salehipour M, Rezaei S, Yazdani M, Mogharabi-Manzari M. Recent advances in preparation of polymer hydrogel composites and their applications in enzyme immobilization. Polym Bull (Berl) 2022. [DOI: 10.1007/s00289-022-04370-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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16
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Scotti A, Schulte MF, Lopez CG, Crassous JJ, Bochenek S, Richtering W. How Softness Matters in Soft Nanogels and Nanogel Assemblies. Chem Rev 2022; 122:11675-11700. [PMID: 35671377 DOI: 10.1021/acs.chemrev.2c00035] [Citation(s) in RCA: 46] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Softness plays a key role in determining the macroscopic properties of colloidal systems, from synthetic nanogels to biological macromolecules, from viruses to star polymers. However, we are missing a way to quantify what the term "softness" means in nanoscience. Having quantitative parameters is fundamental to compare different systems and understand what the consequences of softness on the macroscopic properties are. Here, we propose different quantities that can be measured using scattering methods and microscopy experiments. On the basis of these quantities, we review the recent literature on micro- and nanogels, i.e. cross-linked polymer networks swollen in water, a widely used model system for soft colloids. Applying our criteria, we address the question what makes a nanomaterial soft? We discuss and introduce general criteria to quantify the different definitions of softness for an individual compressible colloid. This is done in terms of the energetic cost associated with the deformation and the capability of the colloid to isotropically deswell. Then, concentrated solutions of soft colloids are considered. New definitions of softness and new parameters, which depend on the particle-to-particle interactions, are introduced in terms of faceting and interpenetration. The influence of the different synthetic routes on the softness of nanogels is discussed. Concentrated solutions of nanogels are considered and we review the recent results in the literature concerning the phase behavior and flow properties of nanogels both in three and two dimensions, in the light of the different parameters we defined. The aim of this review is to look at the results on micro- and nanogels in a more quantitative way that allow us to explain the reported properties in terms of differences in colloidal softness. Furthermore, this review can give researchers dealing with soft colloids quantitative methods to define unambiguously which softness matters in their compound.
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Affiliation(s)
- Andrea Scotti
- Institute of Physical Chemistry, RWTH Aachen University, Landoltweg 2, 52056 Aachen, Germany, European Union
| | - M Friederike Schulte
- Institute of Physical Chemistry, RWTH Aachen University, Landoltweg 2, 52056 Aachen, Germany, European Union
| | - Carlos G Lopez
- Institute of Physical Chemistry, RWTH Aachen University, Landoltweg 2, 52056 Aachen, Germany, European Union
| | - Jérôme J Crassous
- Institute of Physical Chemistry, RWTH Aachen University, Landoltweg 2, 52056 Aachen, Germany, European Union
| | - Steffen Bochenek
- Institute of Physical Chemistry, RWTH Aachen University, Landoltweg 2, 52056 Aachen, Germany, European Union
| | - Walter Richtering
- Institute of Physical Chemistry, RWTH Aachen University, Landoltweg 2, 52056 Aachen, Germany, European Union
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17
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Echeverría C, Mijangos C. Rheology Applied to Microgels: Brief (Revision of the) State of the Art. Polymers (Basel) 2022; 14:1279. [PMID: 35406152 PMCID: PMC9003433 DOI: 10.3390/polym14071279] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2022] [Revised: 03/18/2022] [Accepted: 03/18/2022] [Indexed: 12/10/2022] Open
Abstract
The ability of polymer microgels to rapidly respond to external stimuli is of great interest in sensors, lubricants, and biomedical applications, among others. In most of their uses, microgels are subjected to shear, deformation, and compression forces or a combination of them, leading to variations in their rheological properties. This review article mainly refers to the rheology of microgels, from the hard sphere versus soft particles' model. It clearly describes the scaling theories and fractal structure formation, in particular, the Shih et al. and Wu and Morbidelli models as a tool to determine the interactions among microgel particles and, thus, the viscoelastic properties. Additionally, the most recent advances on the characterization of microgels' single-particle interactions are also described. The review starts with the definition of microgels, and a brief introduction addresses the preparation and applications of microgels and hybrid microgels.
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Affiliation(s)
- Coro Echeverría
- Instituto de Ciencia y Tecnología de Polímeros (ICTP-CSIC), C/Juan de la Cierva 3, 28006 Madrid, Spain;
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18
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Kittel Y, Kuehne AJC, De Laporte L. Translating Therapeutic Microgels into Clinical Applications. Adv Healthc Mater 2022; 11:e2101989. [PMID: 34826201 DOI: 10.1002/adhm.202101989] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2021] [Revised: 11/17/2021] [Indexed: 12/14/2022]
Abstract
Microgels are crosslinked, water-swollen networks with a 10 nm to 100 µm diameter and can be modified chemically or biologically to render them biocompatible for advanced clinical applications. Depending on their intended use, microgels require different mechanical and structural properties, which can be engineered on demand by altering the biochemical composition, crosslink density of the polymer network, and the fabrication method. Here, the fundamental aspects of microgel research and development, as well as their specific applications for theranostics and therapy in the clinic, are discussed. A detailed overview of microgel fabrication techniques with regards to their intended clinical application is presented, while focusing on how microgels can be employed as local drug delivery materials, scavengers, and contrast agents. Moreover, microgels can act as scaffolds for tissue engineering and regeneration application. Finally, an overview of microgels is given, which already made it into pre-clinical and clinical trials, while future challenges and chances are discussed. This review presents an instructive guideline for chemists, material scientists, and researchers in the biomedical field to introduce them to the fundamental physicochemical properties of microgels and guide them from fabrication methods via characterization techniques and functionalization of microgels toward specific applications in the clinic.
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Affiliation(s)
- Yonca Kittel
- DWI – Leibniz Institute for Interactive Materials Forckenbeckstrasse 50 52074 Aachen Germany
| | - Alexander J. C. Kuehne
- DWI – Leibniz Institute for Interactive Materials Forckenbeckstrasse 50 52074 Aachen Germany
- Institute of Organic and Macromolecular Chemistry Ulm University Albert‐Einstein‐Allee 11 89081 Ulm Germany
- Institute of Technical and Macromolecular Chemistry (ITMC) Polymeric Biomaterials RWTH University Aachen Worringerweg 2 52074 Aachen Germany
| | - Laura De Laporte
- DWI – Leibniz Institute for Interactive Materials Forckenbeckstrasse 50 52074 Aachen Germany
- Max Planck School‐Matter to Life (MtL) Jahnstraße 29 69120 Heidelberg Germany
- Advanced Materials for Biomedicine (AMB) Institute of Applied Medical Engineering (AME) Center for Biohybrid Medical Systems (CBMS) University Hospital RWTH 52074 Aachen Germany
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19
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20
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Nishizawa Y, Watanabe T, Noguchi T, Takizawa M, Song C, Murata K, Minato H, Suzuki D. Durable gelfoams stabilized by compressible nanocomposite microgels. Chem Commun (Camb) 2022; 58:12927-12930. [DOI: 10.1039/d2cc04993g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Compressible nanocomposite microgels can stabilize the air/water interfaces of gas bubbles for several months, which affords durable gelfoams.
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Affiliation(s)
- Yuichiro Nishizawa
- Graduate School of Textile Science & Technology, Shinshu University, Japan
| | - Takumi Watanabe
- Graduate School of Textile Science & Technology, Shinshu University, Japan
| | - Tetsuya Noguchi
- Graduate School of Textile Science & Technology, Shinshu University, Japan
| | - Masaya Takizawa
- Graduate School of Textile Science & Technology, Shinshu University, Japan
| | - Chihong Song
- National Institute for Physiological Sciences and Exploratory Research Center on Life and Living Systems, National Institutes of Natural Sciences, Japan
| | - Kazuyoshi Murata
- National Institute for Physiological Sciences and Exploratory Research Center on Life and Living Systems, National Institutes of Natural Sciences, Japan
| | - Haruka Minato
- Graduate School of Textile Science & Technology, Shinshu University, Japan
| | - Daisuke Suzuki
- Graduate School of Textile Science & Technology, Shinshu University, Japan
- Research Initiative for Supra-Materials, Interdisciplinary Cluster for Cutting Edge Research Institution, Shinshu University, Japan
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21
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Sheth S, Stealey S, Morgan NY, Zustiak SP. Microfluidic Chip Device for In Situ Mixing and Fabrication of Hydrogel Microspheres via Michael-Type Addition. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:11793-11803. [PMID: 34597052 PMCID: PMC9447845 DOI: 10.1021/acs.langmuir.1c01739] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Hydrogel microspheres are sought for a variety of biomedical applications, including therapeutic and cellular delivery, sensors, and lubricants. Robust fabrication of hydrogel microspheres with uniform sizes and properties can be achieved using microfluidic systems that rely on droplet formation and subsequent gelation to form microspheres. Such systems work well when gelation is initiated after droplet formation but are not practical for timed gelation systems where gelation is initiated prior to droplet formation; premature gelation can lead to device blockage, variable microsphere diameter due to viscosity changes in the precursor solution, and limited numbers of microspheres produced in a single run. To enable microfluidic fabrication of microspheres from timed gelation hydrogel systems, an in situ mixing region is needed so that various hydrogel precursor components can be added separately. Here, we designed and evaluated three mixing devices for their effectiveness at mixing hydrogel precursor solutions prior to droplet formation and subsequent gelation. The serpentine geometry was found to be the most effective and was further improved with the inclusion of a pillar array to increase agitation. The optimized device was shown to fully mix precursor solutions and enable the fabrication of monodisperse polyethylene glycol microspheres, offering great potential for use with timed gelation hydrogel systems.
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Affiliation(s)
- Saahil Sheth
- Department of Biomedical Engineering, Saint Louis University, St. Louis, MO, USA 63103
| | - Samuel Stealey
- Department of Biomedical Engineering, Saint Louis University, St. Louis, MO, USA 63103
| | - Nicole Y. Morgan
- Biomedical Engineering and Physical Science Shared Resource, National Institute of Biomedical Imaging and Bioengineering, National Institutes of Health, Bethesda, Maryland, USA 20814
| | - Silviya P. Zustiak
- Department of Biomedical Engineering, Saint Louis University, St. Louis, MO, USA 63103
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22
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Wilms D, Adler Y, Schröer F, Bunnemann L, Schmidt S. Elastic modulus distribution in poly( N-isopopylacrylamide) and oligo(ethylene glycol methacrylate)-based microgels studied by AFM. SOFT MATTER 2021; 17:5711-5717. [PMID: 34013309 DOI: 10.1039/d1sm00291k] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
The spatial elastic modulus distribution of microgel networks in presence and absence of bifunctional crosslinkers is studied by AFM. Thermoresponsive poly(N-isopopylacrylamide) (PNIPAM) and poly(2-(2-methoxyethoxy)ethyl methacrylate-co-oligo(ethylene glycol)methacrylate) (P(MEO2MA-co-OEGMA)) microgels are synthesized via precipitation polymerization above their lower critical solution temperature (LCST). High-resolution elastic modulus profiles are acquired using AFM force-indentation mapping of surface-deposited microgels at 25 °C. For both microgel systems, the use of a bifunctional crosslinker leads to a strong elastic modulus gradient with stiff microgel cores and soft networks toward the edge. In absence of a dedicated crosslinker (self-crosslinking), PNIPAM microgels show a homogeneous elastic modulus distribution, whereas self-crosslinked P(MEO2MA-co-OEGMA) microgels still show decreasing elastic moduli from the centre to the edge of the microgels. However, POEGMA microgels without comonomer showed no elastic modulus gradient suggesting that different incorporation rates of MEO2MA and OEGMA result in a radial variation of the polymer segment density. In addition, when varying the molecular weight of OEGMA the overall elastic modulus was affected, possibly due to molecular weight-dependent phase behavior and different reactivity. This shows that quite different microgel architectures can be obtained by the simple "one-pot" precipitation reaction of microgels which may open to new avenues toward advanced applications.
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Affiliation(s)
- Dimitri Wilms
- Institute for Organic Chemistry and Macromolecular Chemistry, Heinrich-Heine-University, Universitätsstr. 1, 40225 Düsseldorf, Germany.
| | - Yanik Adler
- Institute for Organic Chemistry and Macromolecular Chemistry, Heinrich-Heine-University, Universitätsstr. 1, 40225 Düsseldorf, Germany.
| | - Fabian Schröer
- Institute for Organic Chemistry and Macromolecular Chemistry, Heinrich-Heine-University, Universitätsstr. 1, 40225 Düsseldorf, Germany.
| | - Lennart Bunnemann
- Institute for Organic Chemistry and Macromolecular Chemistry, Heinrich-Heine-University, Universitätsstr. 1, 40225 Düsseldorf, Germany.
| | - Stephan Schmidt
- Institute for Organic Chemistry and Macromolecular Chemistry, Heinrich-Heine-University, Universitätsstr. 1, 40225 Düsseldorf, Germany.
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23
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Affiliation(s)
- Yuichiro Nishizawa
- Graduate School of Textile Science & Technology, Shinshu University, 3-15-1 Tokida, Ueda, Nagano 386-8567, Japan
| | - Kenshiro Honda
- Graduate School of Textile Science & Technology, Shinshu University, 3-15-1 Tokida, Ueda, Nagano 386-8567, Japan
| | - Daisuke Suzuki
- Graduate School of Textile Science & Technology, Shinshu University, 3-15-1 Tokida, Ueda, Nagano 386-8567, Japan
- Research Initiative for Supra-Materials, Interdisciplinary Cluster for Cutting Edge Research, Shinshu University, 3-15-1 Tokida, Ueda, Nagano 386-8567, Japan
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24
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Nishizawa Y, Minato H, Inui T, Saito I, Kureha T, Shibayama M, Uchihashi T, Suzuki D. Nanostructure and thermoresponsiveness of poly( N-isopropyl methacrylamide)-based hydrogel microspheres prepared via aqueous free radical precipitation polymerization. RSC Adv 2021; 11:13130-13137. [PMID: 35423887 PMCID: PMC8697349 DOI: 10.1039/d1ra01650d] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2021] [Accepted: 03/28/2021] [Indexed: 01/13/2023] Open
Abstract
Thermoresponsive hydrogel microspheres (microgels) are smart materials that quickly respond to external stimuli, and their thermoresponsiveness can be tuned by varying the constituent chemical species. Although uniformly sized microgels can be prepared via aqueous free radical precipitation polymerization, the nanostructure of the obtained microgels is complex and remains unclear so far. In the present study, the nanostructure and thermoresponsiveness of poly(N-isopropyl methacrylamide) (pNIPMAm)-based microgels, which have a volume-transition temperature of ∼43 °C, were evaluated mainly using temperature-controllable high-speed atomic force microscopy. These observations, which are characterized by high spatio-temporal resolution, revealed that the pNIPMAm microgels have a peculiar heterogeneous structure, for example a core-shell and non-thermoresponsive nanostructure in the core region, that originates from the precipitation polymerization process. Furthermore, it was found that the adsorption concentration of the microgels on the substrate is one of the keys for controlling their thermoresponsiveness. These findings can be expected to advance the design of new materials such as thermoresponsive nanosheets and stimuli-responsive coatings.
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Affiliation(s)
- Yuichiro Nishizawa
- Graduate School of Textile Science & Technology, Shinshu University 3-15-1 Tokida Ueda Nagano 386-8567 Japan
| | - Haruka Minato
- Graduate School of Textile Science & Technology, Shinshu University 3-15-1 Tokida Ueda Nagano 386-8567 Japan
| | - Takumi Inui
- Graduate School of Textile Science & Technology, Shinshu University 3-15-1 Tokida Ueda Nagano 386-8567 Japan
| | - Ikuma Saito
- Graduate School of Textile Science & Technology, Shinshu University 3-15-1 Tokida Ueda Nagano 386-8567 Japan
| | - Takuma Kureha
- Graduate School of Science & Technology, Hirosaki University 3, Bunkyo-cho, Hirosaki Aomori 036-8561 Japan
| | - Mitsuhiro Shibayama
- Neutron Science and Technology Center, Comprehensive Research Organization for Science and Society 162-1 Shirakata Tokai Ibaraki 319-1106 Japan
| | - Takayuki Uchihashi
- Department of Physics, Structural Biology Research Center, Graduate School of Science, Nagoya University Furo-cho, Chiksusa-ku Nagoya Aichi 464-8602 Japan
- Exploratory Research Center on Life and Living Systems, National Institutes of Natural Science 5-1 Higashiyama, Myodaiji Okazaki Aichi 444-8787 Japan
| | - Daisuke Suzuki
- Graduate School of Textile Science & Technology, Shinshu University 3-15-1 Tokida Ueda Nagano 386-8567 Japan
- Research Initiative for Supra-Materials, Interdisciplinary Cluster for Cutting Edge Research, Shinshu University 3-15-1 Tokida Ueda Nagano 386-8567 Japan
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25
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Piras CC, Kay AG, Genever PG, Smith DK. Self-assembled low-molecular-weight gelator injectable microgel beads for delivery of bioactive agents. Chem Sci 2021; 12:3958-3965. [PMID: 34163666 PMCID: PMC8179440 DOI: 10.1039/d0sc06296k] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2020] [Accepted: 01/25/2021] [Indexed: 12/14/2022] Open
Abstract
We report the preparation of hybrid self-assembled microgel beads by combining the low molecular weight gelator (LMWG) DBS-CONHNH2 and the natural polysaccharide calcium alginate polymer gelator (PG). Microgel formulations based on LMWGs are extremely rare due to the fragility of the self-assembled networks and the difficulty of retaining any imposed shape. Our hybrid beads contain interpenetrated LMWG and PG networks, and are obtained by an emulsion method, allowing the preparation of spherical gel particles of controllable sizes with diameters in the mm or μm range. Microgels based on LMWG/alginate can be easily prepared with reproducible diameters <1 μm (ca. 800 nm). They are stable in water at room temperature for many months, and survive injection through a syringe. The rapid assembly of the LMWG on cooling plays an active role in helping control the diameter of the microgel beads. These LMWG microbeads retained the ability of the parent gel to deliver the bioactive molecule heparin, and in cell culture medium this enhanced the growth of human mesenchymal stem cells. Such microgels may therefore have future applications in tissue repair. This approach to fabricating LMWG microgels is a platform technology, which could potentially be applied to a variety of different functional LMWGs, and hence has wide-ranging potential.
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Affiliation(s)
- Carmen C Piras
- Department of Chemistry, University of York Heslington York YO10 5DD UK
| | - Alasdair G Kay
- Department of Biology, University of York Heslington York YO10 5DD UK
| | - Paul G Genever
- Department of Biology, University of York Heslington York YO10 5DD UK
| | - David K Smith
- Department of Chemistry, University of York Heslington York YO10 5DD UK
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26
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Nishizawa Y, Minato H, Inui T, Uchihashi T, Suzuki D. Nanostructures, Thermoresponsiveness, and Assembly Mechanism of Hydrogel Microspheres during Aqueous Free-Radical Precipitation Polymerization. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:151-159. [PMID: 33355463 DOI: 10.1021/acs.langmuir.0c02654] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Although techniques to produce uniformly sized hydrogel microspheres (microgels) by aqueous free-radical precipitation polymerization are well established, the details of the polymerization process remain mysterious. In the present study, the structural evolution and thermoresponsiveness of the developing microgels during the polymerization were evaluated by temperature-controlled high-speed atomic force microscopy. This analysis clarified that the swelling properties of the precursor microgels formed in the early stages of the polymerization are quite low due to the high incorporation of cross-linkers and that non-thermoresponsive deca-nanosized spherical domains are already present in the precursor microgels. Furthermore, we succeeded in tracking the formation of nuclei and their growth process, which has never been fully understood, in aqueous solution by real-time observations. These findings will help us to design functional microgels with the desired nanostructures via precipitation polymerization.
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Affiliation(s)
- Yuichiro Nishizawa
- Graduate School of Textile Science & Technology, Shinshu University, 3-15-1 Tokida, Ueda, Nagano 386-8567, Japan
| | - Haruka Minato
- Graduate School of Textile Science & Technology, Shinshu University, 3-15-1 Tokida, Ueda, Nagano 386-8567, Japan
| | - Takumi Inui
- Graduate School of Textile Science & Technology, Shinshu University, 3-15-1 Tokida, Ueda, Nagano 386-8567, Japan
| | - Takayuki Uchihashi
- Department of Physics and Structural Biology Research Center, Graduate School of Science, Nagoya University, Furo-cho, Chiksusa-ku, Nagoya, Aichi 464-8602, Japan
- Exploratory Research Center on Life and Living Systems, National Institutes of Natural Sciences, 5-1 Higashiyama, Myodaiji, Okazaki, Aichi 444-8787, Japan
| | - Daisuke Suzuki
- Graduate School of Textile Science & Technology, Shinshu University, 3-15-1 Tokida, Ueda, Nagano 386-8567, Japan
- Research Initiative for Supra-Materials, Interdisciplinary Cluster for Cutting Edge Research, Shinshu University, 3-15-1 Tokida, Ueda, Nagano 386-8567, Japan
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27
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Minato H, Nishizawa Y, Uchihashi T, Suzuki D. Thermoresponsive structural changes of single poly(N-isopropyl acrylamide) hydrogel microspheres under densely packed conditions on a solid substrate. Polym J 2020. [DOI: 10.1038/s41428-020-0372-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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28
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Es Sayed J, Meyer C, Sanson N, Perrin P. Oxidation-Responsive Emulsions Stabilized by Cleavable Metallo-Supramolecular Cross-Linked Microgels. ACS Macro Lett 2020; 9:1040-1045. [PMID: 35648615 DOI: 10.1021/acsmacrolett.0c00389] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
An original route to develop an advanced class of microgel emulsifiers containing stimulable metallo-supramolecular instead of frozen covalent cross-links is reported. The poly(N-isopropylmethacrylamide) (PNiPMAM) chains of the microgel are connected by iron(II)-bis(terpyridine) coordination supramolecular complexes that can be cleaved on demand, leading to unique properties both at interfaces and in volume. The microgel synthesis is not demanding, and the characterization of its supramolecular structure can be precisely achieved by standard methods. Singularly, interfaces of an oil-in-water emulsion stabilized by the supramolecular particles can be triggered at the molecular scale by oxidation of Fe(II) to Fe(III), leading to emulsion breaking. In bulk, we show that a microgel dispersion can indeed be transformed into a polymer solution upon oxidation. Our study paves the way to the discovery of unusual microgel properties as our proof-of-concept can be extended to different supramolecular chemistry and architecture.
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Affiliation(s)
- Julien Es Sayed
- Soft Matter Sciences and Engineering, ESPCI, PSL University, Sorbonne Université, CNRS, 10 rue Vauquelin, 75231 Cedex 05 Paris, France
| | - Christophe Meyer
- Molecular, Macromolecular Chemistry and Materials, ESPCI, PSL University, CNRS, 10 rue Vauquelin, 75231 Cedex 05 Paris, France
| | - Nicolas Sanson
- Soft Matter Sciences and Engineering, ESPCI, PSL University, Sorbonne Université, CNRS, 10 rue Vauquelin, 75231 Cedex 05 Paris, France
| | - Patrick Perrin
- Soft Matter Sciences and Engineering, ESPCI, PSL University, Sorbonne Université, CNRS, 10 rue Vauquelin, 75231 Cedex 05 Paris, France
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29
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Samadian H, Maleki H, Fathollahi A, Salehi M, Gholizadeh S, Derakhshankhah H, Allahyari Z, Jaymand M. Naturally occurring biological macromolecules-based hydrogels: Potential biomaterials for peripheral nerve regeneration. Int J Biol Macromol 2020; 154:795-817. [DOI: 10.1016/j.ijbiomac.2020.03.155] [Citation(s) in RCA: 48] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2020] [Revised: 03/15/2020] [Accepted: 03/16/2020] [Indexed: 12/18/2022]
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30
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Watanabe T, Nishizawa Y, Minato H, Song C, Murata K, Suzuki D. Hydrophobic Monomers Recognize Microenvironments in Hydrogel Microspheres during Free-Radical-Seeded Emulsion Polymerization. Angew Chem Int Ed Engl 2020; 59:8849-8853. [PMID: 32232936 DOI: 10.1002/anie.202003493] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2020] [Revised: 03/25/2020] [Indexed: 11/10/2022]
Abstract
The three-dimensional structure of nanocomposite microgels was precisely determined by cryo-electron micrography. Several nanocomposite microgels that differ with respect to their nanocomposite structure, which were obtained from seeded emulsion polymerization in the presence of microgels, were used as model nanocomposite materials for cryo-electron micrography. The obtained three-dimensional segmentation images of these nanocomposite microgels provide important insights into the interactions between the hydrophobic monomers and the microgels, that is, hydrophobic styrene monomers recognize molecular-scale differences in polarity within the microgels during the emulsion polymerization. This result led to the formation of unprecedented multi-layered nanocomposite microgels, which promise substantial potential in colloidal applications.
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Affiliation(s)
- Takumi Watanabe
- Graduate School of Textile Science & Technology, Shinshu University, 3-15-1 Tokida Ueda, Nagano, 386-8567, Japan
| | - Yuichiro Nishizawa
- Graduate School of Textile Science & Technology, Shinshu University, 3-15-1 Tokida Ueda, Nagano, 386-8567, Japan
| | - Haruka Minato
- Graduate School of Textile Science & Technology, Shinshu University, 3-15-1 Tokida Ueda, Nagano, 386-8567, Japan
| | - Chihong Song
- Department National Institute for Physiological Sciences, 38 Nishigonaka, Okazaki, Aichi, 444-8585, Japan
| | - Kazuyoshi Murata
- Department National Institute for Physiological Sciences, 38 Nishigonaka, Okazaki, Aichi, 444-8585, Japan
| | - Daisuke Suzuki
- Graduate School of Textile Science & Technology, Shinshu University, 3-15-1 Tokida Ueda, Nagano, 386-8567, Japan.,Research Initiative for Supra-Materials, Interdisciplinary Cluster for Cutting Edge Research, Shinshu University, 3-15-1 Tokida Ueda, Nagano, 386-8567, Japan
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31
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Switacz VK, Wypysek SK, Degen R, Crassous JJ, Spehr M, Richtering W. Influence of Size and Cross-Linking Density of Microgels on Cellular Uptake and Uptake Kinetics. Biomacromolecules 2020; 21:4532-4544. [DOI: 10.1021/acs.biomac.0c00478] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Victoria K. Switacz
- Department of Chemosensation, Institute of Biology II, RWTH Aachen University, 52056 Aachen, Germany
| | - Sarah K. Wypysek
- Institute of Physical Chemistry, RWTH Aachen University, 52056 Aachen, Germany
| | - Rudolf Degen
- Department of Chemosensation, Institute of Biology II, RWTH Aachen University, 52056 Aachen, Germany
| | - Jérôme J. Crassous
- Institute of Physical Chemistry, RWTH Aachen University, 52056 Aachen, Germany
| | - Marc Spehr
- Department of Chemosensation, Institute of Biology II, RWTH Aachen University, 52056 Aachen, Germany
| | - Walter Richtering
- Institute of Physical Chemistry, RWTH Aachen University, 52056 Aachen, Germany
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32
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Inui K, Watanabe T, Minato H, Matsui S, Ishikawa K, Yoshida R, Suzuki D. The Belousov-Zhabotinsky Reaction in Thermoresponsive Core-Shell Hydrogel Microspheres with a Tris(2,2'-bipyridyl)ruthenium Catalyst in the Core. J Phys Chem B 2020; 124:3828-3835. [PMID: 32293889 DOI: 10.1021/acs.jpcb.0c02238] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
The Belousov-Zhabotinsky (BZ) reaction shows temporal or spatiotemporal structures such as redox oscillation of the catalyst, [ruthenium(II)tris(2,2'-bipyridine)][PF6]2 ([Ru(bpy)3][PF6]2). In this study, autonomously oscillating hydrogel microspheres (microgels) were investigated, which show swelling/deswelling oscillation induced by the redox oscillation of the BZ reaction inside the gel. Despite the periodically and autonomously induced oscillation that does not require an external stimulus, it has not been possible to perform any manipulation of the oscillatory behavior over time. The results of the present study show that it is possible to reversibly switch the microgel oscillations from an "on" active state of the BZ reaction to an "off" inactive state by changing the temperature in combination with thermoresponsive microgels. To realize on-demand switching, the construction of double-shell structures is crucial; the thermoresponsive first shell allows the microgels to modulate the diffusion of the substrates or intermediates in the BZ reaction, while the second shell maintains colloidal stability under high temperatures and high ion concentrations. The functionalized double-shell microgels were prepared via multistep seeded precipitation polymerization. The oscillatory switching behavior of the BZ reaction was observed directly and evaluated by ultraviolet-visible (UV-vis) spectroscopy. The central concept of this study, i.e., "on-off switching" can be expected to benefit the development of advanced bioinspired materials.
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Affiliation(s)
| | | | | | | | | | - Ryo Yoshida
- Department of Materials Engineering, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
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33
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Zhao Z, Ma X, Chen R, Xue H, Lei J, Du H, Zhang Z, Chen H. Universal Antibacterial Surfaces Fabricated from Quaternary Ammonium Salt-Based PNIPAM Microgels. ACS APPLIED MATERIALS & INTERFACES 2020; 12:19268-19276. [PMID: 32255339 DOI: 10.1021/acsami.0c00791] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Because of the excellent film-forming ability of poly(N-isopropylacrylamide) (PNIPAM) microgel and high-efficient bactericidal property of quaternary ammonium salt (QAS), QAS-based PNIPAM (QAS-PNIPAM) microgels are synthesized and employed to modify the surface of a range of commonly used materials including metal, plastic, and elastomer. Bacterial culture is carried out on such QAS-PNIPAM microgel-modified surfaces to examine the viability of the attached bacteria. It is found that the bactericidal efficiency is nearly 100% on the modified surfaces of all the studied materials. We attribute the high-efficient bactericidal performance of QAS-PNIPAM microgel film to the QAS component rather than the topography of the microgel film itself. In addition, the microgel film is robust and shows great integrity even after culture of the bacteria and repeated rinses, and the cell experiment demonstrates that this microgel film is cyto-compatible. Therefore, such a simple, versatile method of preparing antibacterial films paves the way for future bactericidal applications.
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Affiliation(s)
- Ziqing Zhao
- State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, P. R. China
| | - Xiaoliang Ma
- State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, P. R. China
| | - Rui Chen
- State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, P. R. China
| | - Hui Xue
- State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, P. R. China
| | - Jiehua Lei
- Jiangsu Biosurf Biotech Company Ltd., 218 Xinghu Street, Suzhou 215123, P. R. China
| | - Hui Du
- Jiangsu Biosurf Biotech Company Ltd., 218 Xinghu Street, Suzhou 215123, P. R. China
| | - Zexin Zhang
- State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, P. R. China
| | - Hong Chen
- State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, P. R. China
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34
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Watanabe T, Nishizawa Y, Minato H, Song C, Murata K, Suzuki D. Hydrophobic Monomers Recognize Microenvironments in Hydrogel Microspheres during Free‐Radical‐Seeded Emulsion Polymerization. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202003493] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Takumi Watanabe
- Graduate School of Textile Science & Technology Shinshu University 3-15-1 Tokida Ueda Nagano 386-8567 Japan
| | - Yuichiro Nishizawa
- Graduate School of Textile Science & Technology Shinshu University 3-15-1 Tokida Ueda Nagano 386-8567 Japan
| | - Haruka Minato
- Graduate School of Textile Science & Technology Shinshu University 3-15-1 Tokida Ueda Nagano 386-8567 Japan
| | - Chihong Song
- Department National Institute for Physiological Sciences 38 Nishigonaka Okazaki Aichi 444-8585 Japan
| | - Kazuyoshi Murata
- Department National Institute for Physiological Sciences 38 Nishigonaka Okazaki Aichi 444-8585 Japan
| | - Daisuke Suzuki
- Graduate School of Textile Science & Technology Shinshu University 3-15-1 Tokida Ueda Nagano 386-8567 Japan
- Research Initiative for Supra-Materials Interdisciplinary Cluster for Cutting Edge Research Shinshu University 3-15-1 Tokida Ueda Nagano 386-8567 Japan
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35
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Oberdisse J, Hellweg T. Recent advances in stimuli-responsive core-shell microgel particles: synthesis, characterisation, and applications. Colloid Polym Sci 2020. [DOI: 10.1007/s00396-020-04629-0] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
AbstractInspired by the path followed by Matthias Ballauff over the past 20 years, the development of thermosensitive core-shell microgel structures is reviewed. Different chemical structures, from hard nanoparticle cores to double stimuli-responsive microgels have been devised and successfully implemented by many different groups. Some of the rich variety of these systems is presented, as well as some recent progress in structural analysis of such microstructures by small-angle scattering of neutrons or X-rays, including modelling approaches. In the last part, again following early work by the group of Matthias Ballauff, applications with particular emphasis on incorporation of catalytic nanoparticles inside core-shell structures—stabilising the nanoparticles and granting external control over activity—will be discussed, as well as core-shell microgels at interfaces.
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36
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Itagaki N, Kawaguchi D, Oda Y, Nemoto F, Yamada NL, Yamaguchi T, Tanaka K. Surface Effect on Frictional Properties for Thin Hydrogel Films of Poly(vinyl ether). Macromolecules 2019. [DOI: 10.1021/acs.macromol.9b01786] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | | | | | - Fumiya Nemoto
- Neutron Science Laboratory, High Energy Accelerator Research Organization, Naka, Ibaraki 319-1106, Japan
| | - Norifumi L. Yamada
- Neutron Science Laboratory, High Energy Accelerator Research Organization, Naka, Ibaraki 319-1106, Japan
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37
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Kureha T, Minato H, Suzuki D, Urayama K, Shibayama M. Concentration dependence of the dynamics of microgel suspensions investigated by dynamic light scattering. SOFT MATTER 2019; 15:5390-5399. [PMID: 31204747 DOI: 10.1039/c9sm01030k] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
The dynamics of colloidal gel particle suspensions, i.e., microgel suspensions, has been investigated by dynamic light scattering (DLS) over a wide concentration range from the (I) dilute (φ < φcp) to the (II) intermediate (φ ≈ φcp) and (III) high concentration regions (φ ≫ φcp), where φ and φcp are the volume fraction of the gel particles in the suspension and the random close packing fraction, φcp ≈ 0.64, respectively. The time-intensity correlation function exhibited a distinct change with increasing φ, i.e., from ergodic behaviour (region I and II) to nonergodic behaviour (region III). A mode transition from translational (region I) to cooperative diffusion (the so-called gel mode) (region II) was also observed due to the soft and deformable nature of the microgels. Different from the dynamics of hard colloidal glass suspensions, the gel mode remained even at φ ≫ φcp. By using the ensemble-averaged time-correlation function, IE, we quantify the relationship between φ and their dynamics, and show that the soft microgels are deswollen in the densely packed state.
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Affiliation(s)
- Takuma Kureha
- Institute for Solid State Physics, The University of Tokyo, Kashiwa 277-8581, Japan.
| | - Haruka Minato
- Graduate School of Textile Science & Technology, Shinshu University, Ueda 386-8567, Japan
| | - Daisuke Suzuki
- Graduate School of Textile Science & Technology, Shinshu University, Ueda 386-8567, Japan and Division of Smart Textile, Institute for Fiber Engineering, Interdisciplinary Cluster for Cutting Edge Research, Shinshu University, Ueda 386-8567, Japan
| | - Kenji Urayama
- Department of Macromolecular Science and Engineering, Kyoto Institute of Technology, Sakyo-ku, Kyoto 606-8585, Japan
| | - Mitsuhiro Shibayama
- Institute for Solid State Physics, The University of Tokyo, Kashiwa 277-8581, Japan.
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38
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OURA S, WATANABE T, MINATO H, SUZUKI D. Impact of Particle Softness on Segregation of Binary Colloidal Suspensions Flowing in a Microchannel. KOBUNSHI RONBUNSHU 2019. [DOI: 10.1295/koron.2019-0003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Shun OURA
- Graduate School of Textile Science & Technology, Shinshu University
| | - Takumi WATANABE
- Graduate School of Textile Science & Technology, Shinshu University
| | - Haruka MINATO
- Graduate School of Textile Science & Technology, Shinshu University
| | - Daisuke SUZUKI
- Graduate School of Textile Science & Technology, Shinshu University
- Division of Smart Textiles, Institute for Fiber Engineering, Interdisciplinary Cluster for Cutting Edge Research, Shinshu University
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39
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Nishizawa Y, Matsui S, Urayama K, Kureha T, Shibayama M, Uchihashi T, Suzuki D. Non‐Thermoresponsive Decanano‐sized Domains in Thermoresponsive Hydrogel Microspheres Revealed by Temperature‐Controlled High‐Speed Atomic Force Microscopy. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201903483] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Yuichiro Nishizawa
- Graduate School of Textile Science & Technology Shinshu University 3-15-1 Tokida Ueda Nagano 386-8567 Japan
| | - Shusuke Matsui
- Graduate School of Textile Science & Technology Shinshu University 3-15-1 Tokida Ueda Nagano 386-8567 Japan
| | - Kenji Urayama
- Department of Macromolecular Science and Engineering Kyoto Institute of Technology Sakyo-ku Kyoto 606-8585 Japan
| | - Takuma Kureha
- Institute for Solid State PhysicsThe University of Tokyo Kashiwanoha Kashiwa 277-8581 Japan
| | - Mitsuhiro Shibayama
- Institute for Solid State PhysicsThe University of Tokyo Kashiwanoha Kashiwa 277-8581 Japan
| | - Takayuki Uchihashi
- Department of Physics and Structural Biology Research CenterGraduate School of ScienceNagoya University Furo-cho, Chikusa-ku Nagoya Aichi 464-8602 Japan
- Exploratory Research Center on Life and Living Systems National Institutes of Natural Sciences 5-1 Higashiyama, Myodaiji Okazaki Aichi 444-8787 Japan
| | - Daisuke Suzuki
- Graduate School of Textile Science & Technology Shinshu University 3-15-1 Tokida Ueda Nagano 386-8567 Japan
- Division of Smart TextilesInstitute for Fiber EngineeringInterdisciplinary Cluster for Cutting Edge ResearchShinshu University 3-15-1 Tokida Ueda Nagano 386-8567 Japan
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40
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Nishizawa Y, Matsui S, Urayama K, Kureha T, Shibayama M, Uchihashi T, Suzuki D. Non-Thermoresponsive Decanano-sized Domains in Thermoresponsive Hydrogel Microspheres Revealed by Temperature-Controlled High-Speed Atomic Force Microscopy. Angew Chem Int Ed Engl 2019; 58:8809-8813. [PMID: 31056848 DOI: 10.1002/anie.201903483] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2019] [Indexed: 11/10/2022]
Abstract
Despite the tremendous efforts devoted to the structural analysis of hydrogel microspheres (microgels), many details of their structures remain unclear. Reported in this study is that thermoresponsive poly(N-isopropyl acrylamide) (pNIPAm)-based microgels exhibit not only the widely accepted core-shell structures, but also inhomogeneous decanano-sized non-thermoresponsive spherical domains within their dense cores, which was revealed by temperature-controlled high-speed atomic force microscopy (TC-HS-AFM). Based on a series of experiments, it is concluded that the non-thermoresponsive domains are characteristic for pNIPAm microgels synthesized by precipitation polymerization, and plausible structures for microgels prepared by other polymerization techniques are proposed.
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Affiliation(s)
- Yuichiro Nishizawa
- Graduate School of Textile Science & Technology Shinshu University, 3-15-1 Tokida Ueda, Nagano, 386-8567, Japan
| | - Shusuke Matsui
- Graduate School of Textile Science & Technology Shinshu University, 3-15-1 Tokida Ueda, Nagano, 386-8567, Japan
| | - Kenji Urayama
- Department of Macromolecular Science and Engineering Kyoto Institute of Technology, Sakyo-ku, Kyoto, 606-8585, Japan
| | - Takuma Kureha
- Institute for Solid State Physics, The University of Tokyo, Kashiwanoha, Kashiwa, 277-8581, Japan
| | - Mitsuhiro Shibayama
- Institute for Solid State Physics, The University of Tokyo, Kashiwanoha, Kashiwa, 277-8581, Japan
| | - Takayuki Uchihashi
- Department of Physics and Structural Biology Research Center, Graduate School of Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi, 464-8602, Japan.,Exploratory Research Center on Life and Living Systems National Institutes of Natural Sciences, 5-1 Higashiyama, Myodaiji, Okazaki, Aichi, 444-8787, Japan
| | - Daisuke Suzuki
- Graduate School of Textile Science & Technology Shinshu University, 3-15-1 Tokida Ueda, Nagano, 386-8567, Japan.,Division of Smart Textiles, Institute for Fiber Engineering, Interdisciplinary Cluster for Cutting Edge Research, Shinshu University, 3-15-1 Tokida Ueda, Nagano, 386-8567, Japan
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41
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Karg M, Pich A, Hellweg T, Hoare T, Lyon LA, Crassous JJ, Suzuki D, Gumerov RA, Schneider S, Potemkin II, Richtering W. Nanogels and Microgels: From Model Colloids to Applications, Recent Developments, and Future Trends. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:6231-6255. [PMID: 30998365 DOI: 10.1021/acs.langmuir.8b04304] [Citation(s) in RCA: 336] [Impact Index Per Article: 67.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Nanogels and microgels are soft, deformable, and penetrable objects with an internal gel-like structure that is swollen by the dispersing solvent. Their softness and the potential to respond to external stimuli like temperature, pressure, pH, ionic strength, and different analytes make them interesting as soft model systems in fundamental research as well as for a broad range of applications, in particular in the field of biological applications. Recent tremendous developments in their synthesis open access to systems with complex architectures and compositions allowing for tailoring microgels with specific properties. At the same time state-of-the-art theoretical and simulation approaches offer deeper understanding of the behavior and structure of nano- and microgels under external influences and confinement at interfaces or at high volume fractions. Developments in the experimental analysis of nano- and microgels have become particularly important for structural investigations covering a broad range of length scales relevant to the internal structure, the overall size and shape, and interparticle interactions in concentrated samples. Here we provide an overview of the state-of-the-art, recent developments as well as emerging trends in the field of nano- and microgels. The following aspects build the focus of our discussion: tailoring (multi)functionality through synthesis; the role in biological and biomedical applications; the structure and properties as a model system, e.g., for densely packed arrangements in bulk and at interfaces; as well as the theory and computer simulation.
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Affiliation(s)
- Matthias Karg
- Physical Chemistry I , Heinrich-Heine-University Duesseldorf , 40204 Duesseldorf , Germany
| | - Andrij Pich
- DWI-Leibnitz-Institute for Interactive Materials e.V. , 52056 Aachen , Germany
- Functional and Interactive Polymers, Institute for Technical and Macromolecular Chemistry , RWTH Aachen University , 52056 Aachen , Germany
| | - Thomas Hellweg
- Physical and Biophysical Chemistry , Bielefeld University , 33615 Bielefeld , Germany
| | - Todd Hoare
- Department of Chemical Engineering , McMaster University , Hamilton , Ontario L8S 4L8 , Canada
| | - L Andrew Lyon
- Schmid College of Science and Technology , Chapman University , Orange , California 92866 , United States
| | - J J Crassous
- Institute of Physical Chemistry , RWTH Aachen University , 52056 Aachen , Germany
| | | | - Rustam A Gumerov
- DWI-Leibnitz-Institute for Interactive Materials e.V. , 52056 Aachen , Germany
- Physics Department , Lomonosov Moscow State University , Moscow 119991 , Russian Federation
| | - Stefanie Schneider
- Institute of Physical Chemistry , RWTH Aachen University , 52056 Aachen , Germany
| | - Igor I Potemkin
- DWI-Leibnitz-Institute for Interactive Materials e.V. , 52056 Aachen , Germany
- Physics Department , Lomonosov Moscow State University , Moscow 119991 , Russian Federation
- National Research South Ural State University , Chelyabinsk 454080 , Russian Federation
| | - Walter Richtering
- Institute of Physical Chemistry , RWTH Aachen University , 52056 Aachen , Germany
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42
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Newsom JP, Payne KA, Krebs MD. Microgels: Modular, tunable constructs for tissue regeneration. Acta Biomater 2019; 88:32-41. [PMID: 30769137 PMCID: PMC6441611 DOI: 10.1016/j.actbio.2019.02.011] [Citation(s) in RCA: 51] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2018] [Revised: 01/24/2019] [Accepted: 02/11/2019] [Indexed: 01/02/2023]
Abstract
Biopolymer microgels are emerging as a versatile tool for aiding in the regeneration of damaged tissues due to their biocompatible nature, tunable microporous structure, ability to encapsulate bioactive factors, and tailorable properties such as stiffness and composition. These properties of microgels, along with their injectability, have allowed for their utilization in a multitude of different tissue engineering applications. Controlled release of growth factors, antibodies, and other bioactive factors from microgels have demonstrated their capabilities as transporters for essential bioactive molecules necessary for guiding tissue reconstruction. Additionally, recent in vitro studies of cellular interaction and proliferation within microgel structures have laid the initial groundwork for regenerative tissue engineering using these materials. Microgels have even been crosslinked together in various ways or 3D printed to form three-dimensional scaffolds to support cell growth. In vivo studies of microgels have pioneered the clinical relevance of these novel and innovative materials for regenerative tissue engineering. This review will cover recent developments and research of microgels as they pertain to bioactive factor release, cellular interaction and proliferation in vitro, and tissue regeneration in vivo. STATEMENT OF SIGNIFICANCE: This review is focused on state-of-the-art microgel technology and innovations within the tissue engineering field, focusing on the use of microgels in bioactive factor delivery and as cell-interactive scaffolds, both in vitro and in vivo. Microgels are hydrogel microparticles that can be tuned based on the biopolymer from which they are derived, the crosslinking chemistry used, and the fabrication method. The emergence of microgels for tissue regeneration applications in recent years illuminates their versatility and applicability in clinical settings.
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Affiliation(s)
- Jake P Newsom
- Chemical & Biological Engineering, Colorado School of Mines, Golden, CO, United States
| | - Karin A Payne
- Orthopedics, University of Colorado Anschutz Medical Campus, Aurora, CO, United States
| | - Melissa D Krebs
- Chemical & Biological Engineering, Colorado School of Mines, Golden, CO, United States.
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43
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Watanabe T, Takizawa M, Jiang H, Ngai T, Suzuki D. Hydrophobized nanocomposite hydrogel microspheres as particulate stabilizers for water-in-oil emulsions. Chem Commun (Camb) 2019; 55:5990-5993. [DOI: 10.1039/c9cc01497g] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Hydrophobized nanocomposite microgels can serve as particulate emulsifiers for water-in-oil (W/O) emulsions with different types of oils, including non-polar oils, which usually do not form W/O emulsions with conventional microgels.
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Affiliation(s)
- Takumi Watanabe
- Graduate School of Textile Science & Technology, Shinshu University
- Nagano 386-8567
- Japan
| | - Masaya Takizawa
- Graduate School of Textile Science & Technology, Shinshu University
- Nagano 386-8567
- Japan
| | - Hang Jiang
- Department of Chemistry, The Chinese University of Hong Kong
- Shatin
- Hong Kong
| | - To Ngai
- Department of Chemistry, The Chinese University of Hong Kong
- Shatin
- Hong Kong
| | - Daisuke Suzuki
- Graduate School of Textile Science & Technology, Shinshu University
- Nagano 386-8567
- Japan
- Division of Smart Textiles, Institute for Fiber Engineering, Interdisciplinary Cluster for Cutting Edge Research, Shinshu University
- Nagano 386-8567
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44
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Matsui S, Hosho K, Minato H, Uchihashi T, Suzuki D. Protein uptake into individual hydrogel microspheres visualized by high-speed atomic force microscopy. Chem Commun (Camb) 2019; 55:10064-10067. [DOI: 10.1039/c9cc05116c] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
The moment of protein uptake into hydrogel microspheres (microgels) was directly monitored at the nanoscale by high-speed atomic force microscopy, and suitable design of microgels to suppress the aggregation in the presence of proteins was found.
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Affiliation(s)
- Shusuke Matsui
- Graduate School of Textile Science & Technology
- Shinshu University
- Nagano 386-8567
- Japan
| | - Kensuke Hosho
- Graduate School of Textile Science & Technology
- Shinshu University
- Nagano 386-8567
- Japan
| | - Haruka Minato
- Graduate School of Textile Science & Technology
- Shinshu University
- Nagano 386-8567
- Japan
| | - Takayuki Uchihashi
- Department of Physics and Structural Biology Research Center
- Graduate School of Science
- Nagoya University
- Nagoya
- Japan
| | - Daisuke Suzuki
- Graduate School of Textile Science & Technology
- Shinshu University
- Nagano 386-8567
- Japan
- Research Initiative for Supra-Materials
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Matsui S, Nishizawa Y, Uchihashi T, Suzuki D. Monitoring Thermoresponsive Morphological Changes in Individual Hydrogel Microspheres. ACS OMEGA 2018; 3:10836-10842. [PMID: 31459195 PMCID: PMC6645467 DOI: 10.1021/acsomega.8b01770] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2018] [Accepted: 08/24/2018] [Indexed: 06/10/2023]
Abstract
Real-time morphology/structure changes in individual hydrogel microspheres (microgels) were directly visualized at high spatiotemporal resolution using high-speed atomic force microscopy (HS-AFM) under temperature control ranging from room temperature to ∼40 °C. The recorded HS-AFM movies demonstrate that the size and morphology of thermoresponsive poly(N-isopropyl acrylamide)-based microgels change with increasing temperature at the individual microgel level. Specifically, the height of the microgels gradually decreases and domain structures appeared even below the volume phase transition temperature. Moreover, the domain structure is retained, even after the microgels have fully collapsed. The present study thus demonstrates that temperature-controlled HS-AFM is a useful tool for monitoring stimulus-responsiveness of microgels. In the near future, it should furthermore be possible to extend this temperature-controlled HS-AFM to other stimulus-responsive materials, including autonomously oscillating microgels.
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Affiliation(s)
- Shusuke Matsui
- Graduate
School of Textile Science & Technology and Division of Smart Textile, Institute
for Fiber Engineering, Interdisciplinary Cluster for Cutting Edge
Research, Shinshu University, 3-15-1 Tokida, Ueda, Nagano 386-8567, Japan
| | - Yuichiro Nishizawa
- Graduate
School of Textile Science & Technology and Division of Smart Textile, Institute
for Fiber Engineering, Interdisciplinary Cluster for Cutting Edge
Research, Shinshu University, 3-15-1 Tokida, Ueda, Nagano 386-8567, Japan
| | - Takayuki Uchihashi
- Department
of Physics and Structural Biology Research Center, Graduate School
of Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8602, Japan
| | - Daisuke Suzuki
- Graduate
School of Textile Science & Technology and Division of Smart Textile, Institute
for Fiber Engineering, Interdisciplinary Cluster for Cutting Edge
Research, Shinshu University, 3-15-1 Tokida, Ueda, Nagano 386-8567, Japan
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Matsui S, Inui K, Kumai Y, Yoshida R, Suzuki D. Autonomously Oscillating Hydrogel Microspheres with High-Frequency Swelling/Deswelling and Dispersing/Flocculating Oscillations. ACS Biomater Sci Eng 2018; 5:5615-5622. [DOI: 10.1021/acsbiomaterials.8b00850] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Shusuke Matsui
- Graduate School of Textile Science and Technology, Shinshu University, 3-15-1 Tokida, Ueda, Nagano 386-8567, Japan
| | - Kohei Inui
- Graduate School of Textile Science and Technology, Shinshu University, 3-15-1 Tokida, Ueda, Nagano 386-8567, Japan
| | - Yuki Kumai
- Graduate School of Textile Science and Technology, Shinshu University, 3-15-1 Tokida, Ueda, Nagano 386-8567, Japan
| | - Ryo Yoshida
- Department of Materials Engineering, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku 113-8656, Japan
| | - Daisuke Suzuki
- Graduate School of Textile Science and Technology, Shinshu University, 3-15-1 Tokida, Ueda, Nagano 386-8567, Japan
- Division of Smart Textiles, Institute for Fiber Engineering, Interdisciplinary Cluster for Cutting Edge Research, Shinshu University, 3-15-1 Tokida, Ueda, Nagano 386-8567, Japan
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47
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Watanabe T, Song C, Murata K, Kureha T, Suzuki D. Seeded Emulsion Polymerization of Styrene in the Presence of Water-Swollen Hydrogel Microspheres. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:8571-8580. [PMID: 29957963 DOI: 10.1021/acs.langmuir.8b01047] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
In a previous study, we have ascertained that the charge distribution in hydrogel microspheres (microgels) plays a crucial role in controlling the nanocomposite structure of the polystyrene obtained from the seeded emulsion polymerization (SEP) of styrene in the presence of microgels. However, all these polymerizations were conducted at high temperature, where most of these microgels were dehydrated and deswollen. In the present study, we initially verified that the nanocomposite microgels can be synthesized even when the seed microgels are swollen and hydrated during the SEP of styrene. These highly swollen microgels were used as the nucleation sites for the polystyrene, and subsequently the propagation of the hydrophobic polystyrenes proceeded within water-swollen microgels.
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Affiliation(s)
| | - Chihong Song
- National Institute for Physiological Sciences , 38 Nishigonaka , Okazaki , Aichi 444-8585 , Japan
| | - Kazuyoshi Murata
- National Institute for Physiological Sciences , 38 Nishigonaka , Okazaki , Aichi 444-8585 , Japan
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48
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Kureha T, Nagase Y, Suzuki D. High Reusability of Catalytically Active Gold Nanoparticles Immobilized in Core-Shell Hydrogel Microspheres. ACS OMEGA 2018; 3:6158-6165. [PMID: 31458799 PMCID: PMC6644724 DOI: 10.1021/acsomega.8b00819] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/25/2018] [Accepted: 05/25/2018] [Indexed: 05/29/2023]
Abstract
The reusability of hybrid core-shell microgels, whose core surfaces were decorated with gold nanoparticles, was investigated in terms of catalysis activity. Hybrid core-shell microgels composed of a rigid core and water-swollen gel shell endowed the immobilized gold nanoparticles with a high dispersion stability, which resulted in excellent catalytic activity. In contrast to free Au nanoparticles and conventional hybrid microgels, where the Au nanoparticles are randomly distributed over the entire microgel templates, the hydrogel shell part of the hybrid core-shell microgels suppressed the aggregation between the microgels and Au nanoparticles in individual microgels, which improved the reusability for the catalysis reaction. The results of this study should help to develop advanced catalyst systems that require high reusability even when the chemical reactions occur in aqueous solution and external stimuli are applied.
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Affiliation(s)
- Takuma Kureha
- Graduate
School of Textile Science & Technology and Division of Smart Textiles, Institute
for Fiber Engineering, Interdisciplinary Cluster for Cutting Edge
Research, Shinshu University, 3-15-1 Tokida, Ueda 386-8567, Japan
| | - Yasuhisa Nagase
- Graduate
School of Textile Science & Technology and Division of Smart Textiles, Institute
for Fiber Engineering, Interdisciplinary Cluster for Cutting Edge
Research, Shinshu University, 3-15-1 Tokida, Ueda 386-8567, Japan
| | - Daisuke Suzuki
- Graduate
School of Textile Science & Technology and Division of Smart Textiles, Institute
for Fiber Engineering, Interdisciplinary Cluster for Cutting Edge
Research, Shinshu University, 3-15-1 Tokida, Ueda 386-8567, Japan
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49
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Echeverria C, Fernandes SN, Godinho MH, Borges JP, Soares PIP. Functional Stimuli-Responsive Gels: Hydrogels and Microgels. Gels 2018; 4:E54. [PMID: 30674830 PMCID: PMC6209286 DOI: 10.3390/gels4020054] [Citation(s) in RCA: 87] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2018] [Revised: 05/30/2018] [Accepted: 06/08/2018] [Indexed: 12/18/2022] Open
Abstract
One strategy that has gained much attention in the last decades is the understanding and further mimicking of structures and behaviours found in nature, as inspiration to develop materials with additional functionalities. This review presents recent advances in stimuli-responsive gels with emphasis on functional hydrogels and microgels. The first part of the review highlights the high impact of stimuli-responsive hydrogels in materials science. From macro to micro scale, the review also collects the most recent studies on the preparation of hybrid polymeric microgels composed of a nanoparticle (able to respond to external stimuli), encapsulated or grown into a stimuli-responsive matrix (microgel). This combination gave rise to interesting multi-responsive functional microgels and paved a new path for the preparation of multi-stimuli "smart" systems. Finally, special attention is focused on a new generation of functional stimuli-responsive polymer hydrogels able to self-shape (shape-memory) and/or self-repair. This last functionality could be considered as the closing loop for smart polymeric gels.
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Affiliation(s)
- Coro Echeverria
- Instituto de Ciencia y Tecnología de Polímeros, ICTP-CSIC, Calle Juan de la Cierva 3, Madrid 28006, Spain.
| | - Susete N Fernandes
- I3N/CENIMAT, Department of Materials Science, Faculty of Science and Technology, Universidade NOVA de Lisboa, Campus de Caparica, Caparica 2829-516, Portugal.
| | - Maria H Godinho
- I3N/CENIMAT, Department of Materials Science, Faculty of Science and Technology, Universidade NOVA de Lisboa, Campus de Caparica, Caparica 2829-516, Portugal.
| | - João Paulo Borges
- I3N/CENIMAT, Department of Materials Science, Faculty of Science and Technology, Universidade NOVA de Lisboa, Campus de Caparica, Caparica 2829-516, Portugal.
| | - Paula I P Soares
- I3N/CENIMAT, Department of Materials Science, Faculty of Science and Technology, Universidade NOVA de Lisboa, Campus de Caparica, Caparica 2829-516, Portugal.
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Douliez JP, Martin N, Beneyton T, Eloi JC, Chapel JP, Navailles L, Baret JC, Mann S, Béven L. Preparation of Swellable Hydrogel-Containing Colloidosomes from Aqueous Two-Phase Pickering Emulsion Droplets. Angew Chem Int Ed Engl 2018; 57:7780-7784. [PMID: 29683257 DOI: 10.1002/anie.201802929] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2018] [Indexed: 12/22/2022]
Abstract
The fabrication of stable colloidosomes derived from water-in-water Pickering-like emulsions are described that were produced by addition of fluorescent amine-modified polystyrene latex beads to an aqueous two-phase system consisting of dextran-enriched droplets dispersed in a PEG-enriched continuous phase. Addition of polyacrylic acid followed by carbodiimide-induced crosslinking with dextran produces hydrogelled droplets capable of reversible swelling and selective molecular uptake and exclusion. Colloidosomes produced specifically in all-water systems could offer new opportunities in microencapsulation and the bottom-up construction of synthetic protocells.
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Affiliation(s)
- Jean-Paul Douliez
- UMR 1332, biologie du fruit et pathologie, INRA, Univ. Bordeaux, centre de Bordeaux, 33883, Villenave d'Ornon, France
| | - Nicolas Martin
- Centre for Organized Matter Chemistry and Centre for Protolife Research, School of Chemistry, University of Bristol, Cantock's Close, BS8 1TS, Bristol, UK
| | - Thomas Beneyton
- CNRS, Univ. Bordeaux, CRPP, 115 Av. A. Schweitzer, 33600, Pessac, France
| | - Jean-Charles Eloi
- Chemical Imaging Facility, School of Chemistry, University of Bristol, Cantock's Close, BS8 1TS, Bristol, UK
| | - Jean-Paul Chapel
- CNRS, Univ. Bordeaux, CRPP, 115 Av. A. Schweitzer, 33600, Pessac, France
| | - Laurence Navailles
- CNRS, Univ. Bordeaux, CRPP, 115 Av. A. Schweitzer, 33600, Pessac, France
| | | | - Stephen Mann
- Centre for Organized Matter Chemistry and Centre for Protolife Research, School of Chemistry, University of Bristol, Cantock's Close, BS8 1TS, Bristol, UK
| | - Laure Béven
- UMR 1332, biologie du fruit et pathologie, INRA, Univ. Bordeaux, centre de Bordeaux, 33883, Villenave d'Ornon, France
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