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Kanokova D, Matejka R, Zaloudkova M, Zigmond J, Supova M, Matejkova J. Active Media Perfusion in Bioprinted Highly Concentrated Collagen Bioink Enhances the Viability of Cell Culture and Substrate Remodeling. Gels 2024; 10:316. [PMID: 38786233 PMCID: PMC11120981 DOI: 10.3390/gels10050316] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2024] [Revised: 04/29/2024] [Accepted: 05/02/2024] [Indexed: 05/25/2024] Open
Abstract
The bioprinting of high-concentrated collagen bioinks is a promising technology for tissue engineering and regenerative medicine. Collagen is a widely used biomaterial for bioprinting because of its natural abundance in the extracellular matrix of many tissues and its biocompatibility. High-concentrated collagen hydrogels have shown great potential in tissue engineering due to their favorable mechanical and structural properties. However, achieving high cell proliferation rates within these hydrogels remains a challenge. In static cultivation, the volume of the culture medium is changed once every few days. Thus, perfect perfusion is not achieved due to the relative increase in metabolic concentration and no medium flow. Therefore, in our work, we developed a culture system in which printed collagen bioinks (collagen concentration in hydrogels of 20 and 30 mg/mL with a final concentration of 10 and 15 mg/mL in bioink) where samples flow freely in the culture medium, thus enhancing the elimination of nutrients and metabolites of cells. Cell viability, morphology, and metabolic activity (MTT tests) were analyzed on collagen hydrogels with a collagen concentration of 20 and 30 mg/mL in static culture groups without medium exchange and with active medium perfusion; the influence of pure growth culture medium and smooth muscle cells differentiation medium was next investigated. Collagen isolated from porcine skins was used; every batch was titrated to optimize the pH of the resulting collagen to minimize the difference in production batches and, therefore, the results. Active medium perfusion significantly improved cell viability and activity in the high-concentrated gel, which, to date, is the most limiting factor for using these hydrogels. In addition, based on SEM images and geometry analysis, the cells remodel collagen material to their extracellular matrix.
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Affiliation(s)
- Denisa Kanokova
- Department of Biomedical Technology, Faculty of Biomedical Engineering, Czech Technical University in Prague, Sitna 3105, 272 01 Kladno, Czech Republic; (D.K.); (R.M.); (J.Z.)
| | - Roman Matejka
- Department of Biomedical Technology, Faculty of Biomedical Engineering, Czech Technical University in Prague, Sitna 3105, 272 01 Kladno, Czech Republic; (D.K.); (R.M.); (J.Z.)
| | - Margit Zaloudkova
- Department of Composites and Carbon Materials, Institute of Rock Structure and Mechanics, Czech Academy of Sciences, 182 09 Prague, Czech Republic; (M.Z.); (M.S.)
| | - Jan Zigmond
- Department of Biomedical Technology, Faculty of Biomedical Engineering, Czech Technical University in Prague, Sitna 3105, 272 01 Kladno, Czech Republic; (D.K.); (R.M.); (J.Z.)
| | - Monika Supova
- Department of Composites and Carbon Materials, Institute of Rock Structure and Mechanics, Czech Academy of Sciences, 182 09 Prague, Czech Republic; (M.Z.); (M.S.)
| | - Jana Matejkova
- Department of Biomedical Technology, Faculty of Biomedical Engineering, Czech Technical University in Prague, Sitna 3105, 272 01 Kladno, Czech Republic; (D.K.); (R.M.); (J.Z.)
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Suhail M, Fang CW, Chiu IH, Hung MC, Vu QL, Lin IL, Wu PC. Designing and In Vitro Characterization of pH-Sensitive Aspartic Acid-Graft-Poly(Acrylic Acid) Hydrogels as Controlled Drug Carriers. Gels 2022; 8:gels8080521. [PMID: 36005122 PMCID: PMC9407557 DOI: 10.3390/gels8080521] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2022] [Revised: 08/15/2022] [Accepted: 08/16/2022] [Indexed: 01/06/2023] Open
Abstract
Acetaminophen is an odorless and white crystalline powder drug, used in the management of fever, pain, and headache. The half-life of acetaminophen is very short; thus, multiple intakes of acetaminophen are needed in a day to maintain a constant pharmacological action for an extended period of time. Certain severe adverse effects are produced due to the frequent intake of acetaminophen, especially hepatotoxicity and skin rashes. Therefore, a drug carrier system is needed which not only prolongs the release of acetaminophen, but also enhances the patient compliance. Therefore, the authors prepared novel aspartic acid-graft-poly(acrylic acid) hydrogels for the controlled release of acetaminophen. The novelty of the prepared hydrogels is based on the incorporation of pH-sensitive monomer acrylic acid with polymer aspartic acid in the presence of ethylene glycol dimethacrylate. Due to the pH-sensitive nature, the release of acetaminophen was prolonged for an extended period of time by the developed hydrogels. Hence, a series of studies was carried out for the formulated hydrogels including sol-gel fraction, FTIR, dynamic swelling, polymer volume analysis, thermal analysis, percent porosity, SEM, in vitro drug release studies, and PXRD analysis. FTIR analysis confirmed the grafting of acrylic acid onto the backbone of aspartic acid and revealed the development of hydrogels. The thermal studies revealed the high thermal stability of the fabricated hydrogels as compared to pure aspartic acid. An irregular surface with a few pores was indicated by SEM. PXRD revealed the amorphous state of the developed hydrogels and confirmed the reduction in the crystallinity of the unreacted aspartic acid by the formulated hydrogels. An increase in gel fraction was observed with the increasing concentration of aspartic acid, acrylic acid, and ethylene glycol dimethacrylate due to the availability of a high amount of free radicals. The porosity study was influenced by the various compositions of developed hydrogels. Porosity was increased due to the enhancement in the concentrations of aspartic acid and acrylic acid, whereas it decreased with the increase in ethylene glycol dimethacrylate concentration. Similarly, the pH-responsive properties of hydrogels were evaluated by dynamic swelling and in vitro drug release studies at two different pH levels (1.2 and 7.4), and a greater dynamic swelling and acetaminophen release were exhibited at pH 7.4 as compared to pH 1.2. An increase in swelling, drug loading, and drug release was seen with the increased incorporation of aspartic acid and acrylic acid, whereas a decrease was detected with the increase in the concentration of ethylene glycol dimethacrylate. Conclusively, the formulated aspartic acid-based hydrogels could be employed as a suitable nonactive pharmaceutical ingredient for the controlled delivery of acetaminophen.
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Affiliation(s)
- Muhammad Suhail
- School of Pharmacy, Kaohsiung Medical University, 100 Shih-Chuan 1st Road, Kaohsiung 80708, Taiwan
| | - Chih-Wun Fang
- Divison of Pharmacy, Zuoying Branch of Kaohsiung Armed Forces General Hospital, Kaohsiung 81342, Taiwan
| | - I-Hui Chiu
- School of Pharmacy, Kaohsiung Medical University, 100 Shih-Chuan 1st Road, Kaohsiung 80708, Taiwan
| | - Ming-Chia Hung
- School of Pharmacy, Kaohsiung Medical University, 100 Shih-Chuan 1st Road, Kaohsiung 80708, Taiwan
| | - Quoc Lam Vu
- Department of Clinical Pharmacy, Thai Nguyen University of Medicine and Pharmacy, 284 Luong Ngoc Quyen Str., Thai Nguyen 24000, Vietnam
| | - I-Ling Lin
- Department of Medicine Laboratory Science and Biotechnology, College of Health Science, Kaohsiung Medical University, Kaohsiung 80708, Taiwan
| | - Pao-Chu Wu
- School of Pharmacy, Kaohsiung Medical University, 100 Shih-Chuan 1st Road, Kaohsiung 80708, Taiwan
- Department of Medical Research, Kaohsiung Medical University Hospital, Kaohsiung 80708, Taiwan
- Drug Development and Value Creation Research Center, Kaohsiung Medical University, Kaohsiung 80708, Taiwan
- Correspondence: ; Tel.: +886-7-3121-101
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Zhao J, Liu P, Liu Y. Adjustable Tribological Behavior of Glucose-Sensitive Hydrogels. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:7479-7487. [PMID: 29860837 DOI: 10.1021/acs.langmuir.8b01388] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Stimuli-responsive hydrogels have been considered to have various applications in numerous fields. In the present work, a double-network (DN) hydrogel has been synthesized. The copolymers of 2-acrylamide-2-methylpropane sulfonic acid (AMPS) and acrylamide (AM) [P(AMPS- co-AM)] are prepared as the 1st network and poly(acrylic acid) as the 2nd network. This DN hydrogel is sensitive to glucose by introducing the glucose-sensitive group phenylboronic acid to the network. The tribological properties of this glucose-sensitive DN hydrogel have been investigated using a universal mechanical tester (UMT-5). The tribological results show that the friction coefficient varied with the glucose solution. The friction coefficient increased to a maximum of 0.06, and finally decreased to 0.025 with the increase in the glucose concentration. An adjustable friction coefficient of the hydrogel, between 0.025 and 0.056, was achieved along with the change of lubricant. According to the tribological experimental results and the analysis of the DN structure, it can be deduced that a hydrated layer exists in the interface of the hydrogel. The hydrated layers consisting of water molecules are bounded with the hydrophilic group of the hydrogel network by hydrogen bonds. The change in the number of water molecules leads to the difference in the water content of the hydrogel, which further resulted in the various tribological properties. In addition, the hydrogel's mesh size also has an impact on the change in friction coefficient. In general, the adjustable friction of the hydrogel in a glucose environment is achieved.
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Affiliation(s)
- Jin Zhao
- State Key Laboratory of Tribology , Tsinghua University , Beijing 100084 , China
| | - Pengxiao Liu
- State Key Laboratory of Tribology , Tsinghua University , Beijing 100084 , China
| | - Yuhong Liu
- State Key Laboratory of Tribology , Tsinghua University , Beijing 100084 , China
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Haraguchi K, Kimura Y, Shimizu S. Reversible generation of large retractive tensile forces in isometric chemo-mechanical actuators composed of nanocomposite hydrogels and aqueous NaCl solutions. SOFT MATTER 2018; 14:927-933. [PMID: 29313862 DOI: 10.1039/c7sm01935a] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
This article addresses the generation of large mechanical forces in muscle-like isometric actuator systems composed of stimuli-responsive nanocomposite hydrogels (NC gels) and aqueous NaCl solutions. NC gels with poly(N-isopropylacrylamide)-clay (PNIPA-clay) network structures exhibit high mechanical toughnesses and reversible swelling/deswelling behavior in the absence/presence of NaCl. NC gels constrained to constant lengths in brine generate enhanced contractive forces due to the salt-induced coil-to-globule transitions that are more than ten times larger than those induced thermally. A retractive tensile force (4 N/170 kPa), comparable to that of human muscle, was repeatedly generated at 20 °C using an appropriately composed NC gel (clay: 2 mol%, PNIPA: 2 M), and by alternating the NaCl concentration between 0 and 5 M. This phenomenon is attributed to the combined effects of enhanced deswelling behavior resulting from the salt-induced coil-to-globule transition of PNIPA and the high stiffness of the deswollen gel due to the NaCl-strengthened PNIPA-clay network.
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Affiliation(s)
- Kazutoshi Haraguchi
- Department of Applied Molecular Chemistry, College of Industrial Technology, Nihon University, 1-2-1 Izumi-cho, Narashino, Chiba 275-8575, Japan.
| | - Yuji Kimura
- Department of Applied Molecular Chemistry, College of Industrial Technology, Nihon University, 1-2-1 Izumi-cho, Narashino, Chiba 275-8575, Japan.
| | - Shouichi Shimizu
- Department of Applied Molecular Chemistry, College of Industrial Technology, Nihon University, 1-2-1 Izumi-cho, Narashino, Chiba 275-8575, Japan.
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Oh JS, Park JS, Han CM, Lee EJ. Facile in situ formation of hybrid gels for direct-forming tissue engineering. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2017; 78:796-805. [PMID: 28576052 DOI: 10.1016/j.msec.2017.04.111] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/05/2017] [Revised: 04/18/2017] [Accepted: 04/19/2017] [Indexed: 11/18/2022]
Abstract
Development of bioactive hydrogel as extracellular matrix (ECM) is a very important field for cell-based therapy. In this study, we provided a facile method based on sol-gel process for fabricating bioactive composite hydrogels. The composite hydrogels were composed of sol-gel derived silica and biopolymer. Different amounts of silica solution (20-80wt%) were mixed with 2% polymer sol (alginate) followed by aging and gelation to form a network so that the alginate-silica hybrid mixture could form a gel without any additional crosslinking process. The self-gelation time of the hybrid hydrogel measured by rheometer was reduced as the content of silica was increased. Such hydrogels had highly porous and interconnected structures. Their strut showed uniform surface texture. Under physiological conditions (PBS, 37°C), these hybrid hydrogels exhibited long-term stability compared to alginate hydrogels as control. The mechanical properties of these hydrogels such as compressive strength, compressive modulus, and work of fracture were significantly enhanced by hybridization with sol-gel derived silica. In vitro cell tests revealed that these hybrid hydrogels exhibited improved cell adhesion and proliferation behaviors compared to pure alginate hydrogel cross-linked by CaCl2 solution. Furthermore, cell encapsulation within these hydrogels revealed that their alginate-silica composite provided suitable microenvironment for cell survival.
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Affiliation(s)
- Jun-Sung Oh
- Department of Nano-biomedical Science & BK21 PLUS NBM Global Research Center for Regenerative Medicine, Dankook University, Cheonan 31116, Republic of Korea
| | - Jeong-Soon Park
- Department of Nano-biomedical Science & BK21 PLUS NBM Global Research Center for Regenerative Medicine, Dankook University, Cheonan 31116, Republic of Korea
| | - Cheol-Min Han
- Division of Orthodontics, College of Dentistry, Ohio State University, Columbus, OH 43210, United States.
| | - Eun-Jung Lee
- Department of Nano-biomedical Science & BK21 PLUS NBM Global Research Center for Regenerative Medicine, Dankook University, Cheonan 31116, Republic of Korea.
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6
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Basak S, Nandi N, Paul S, Hamley IW, Banerjee A. A tripeptide-based self-shrinking hydrogel for waste-water treatment: removal of toxic organic dyes and lead (Pb2+) ions. Chem Commun (Camb) 2017; 53:5910-5913. [DOI: 10.1039/c7cc01774j] [Citation(s) in RCA: 71] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
A tripeptide-based supramolecular automatically self-shrinking superhydrogel has been discovered for the efficient removal of toxic organic dyes and Pb2+ ions from waste-water.
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Affiliation(s)
- Shibaji Basak
- Department of Biological Chemistry
- Indian Association for the Cultivation of Science
- Kolkata
- India
| | - Nibedita Nandi
- Department of Biological Chemistry
- Indian Association for the Cultivation of Science
- Kolkata
- India
| | - Subir Paul
- Department of Biological Chemistry
- Indian Association for the Cultivation of Science
- Kolkata
- India
| | - Ian W. Hamley
- Department of Chemistry
- University of Reading
- Reading
- UK
| | - Arindam Banerjee
- Department of Biological Chemistry
- Indian Association for the Cultivation of Science
- Kolkata
- India
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7
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Foroughi J, Spinks GM, Aziz S, Mirabedini A, Jeiranikhameneh A, Wallace GG, Kozlov ME, Baughman RH. Knitted Carbon-Nanotube-Sheath/Spandex-Core Elastomeric Yarns for Artificial Muscles and Strain Sensing. ACS NANO 2016; 10:9129-9135. [PMID: 27607843 DOI: 10.1021/acsnano.6b04125] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
Highly stretchable, actuatable, electrically conductive knitted textiles based on Spandex (SPX)/CNT (carbon nanotube) composite yarns were prepared by an integrated knitting procedure. SPX filaments were continuously wrapped with CNT aerogel sheets and supplied directly to an interlocking circular knitting machine to form three-dimensional electrically conductive and stretchable textiles. By adjusting the SPX/CNT feed ratio, the fabric electrical conductivities could be tailored in the range of 870 to 7092 S/m. The electrical conductivity depended on tensile strain, with a linear and largely hysteresis-free resistance change occurring on loading and unloading between 0% and 80% strain. Electrothermal heating of the stretched fabric caused large tensile contractions of up to 33% and generated a gravimetric mechanical work capacity during contraction of up to 0.64 kJ/kg and a maximum specific power output of 1.28 kW/kg, which far exceeds that of mammalian skeletal muscle. The knitted textile provides the combination of strain sensing and the ability to control dimensions required for smart clothing that simultaneously monitors the wearer's movements and adjusts the garment fit or exerts forces or pressures on the wearer, according to needs. The developed processing method is scalable for the fabrication of industrial quantities of strain sensing and actuating smart textiles.
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Affiliation(s)
- Javad Foroughi
- Intelligent Polymer Research Institute, ARC Centre of Excellence for Electromaterials Science, University of Wollongong , Wollongong, NSW 2522, Australia
- Illawarra Health and Medical Research Institute (IHMRI), University of Wollongong , Wollongong, NSW 2522, Australia
| | - Geoffrey M Spinks
- Intelligent Polymer Research Institute, ARC Centre of Excellence for Electromaterials Science, University of Wollongong , Wollongong, NSW 2522, Australia
| | - Shazed Aziz
- Intelligent Polymer Research Institute, ARC Centre of Excellence for Electromaterials Science, University of Wollongong , Wollongong, NSW 2522, Australia
| | - Azadeh Mirabedini
- Intelligent Polymer Research Institute, ARC Centre of Excellence for Electromaterials Science, University of Wollongong , Wollongong, NSW 2522, Australia
| | - Ali Jeiranikhameneh
- Intelligent Polymer Research Institute, ARC Centre of Excellence for Electromaterials Science, University of Wollongong , Wollongong, NSW 2522, Australia
| | - Gordon G Wallace
- Intelligent Polymer Research Institute, ARC Centre of Excellence for Electromaterials Science, University of Wollongong , Wollongong, NSW 2522, Australia
| | - Mikhail E Kozlov
- Alan G MacDiarmid NanoTech Institute, University of Texas at Dallas , Richardson, Texas 75083, United States
| | - Ray H Baughman
- Alan G MacDiarmid NanoTech Institute, University of Texas at Dallas , Richardson, Texas 75083, United States
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8
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Li L, Shi Y, Pan L, Shi Y, Yu G. Rational design and applications of conducting polymer hydrogels as electrochemical biosensors. J Mater Chem B 2015; 3:2920-2930. [PMID: 32262490 DOI: 10.1039/c5tb00090d] [Citation(s) in RCA: 91] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Conducting polymer hydrogels (CPHs) are conducting polymer-based materials that contain high water content and have physical properties, resembling the extracellular environment. Synergizing the advantages of both the organic conductors and hydrogels, CPHs emerged to be candidates for high performance biosensors by providing advantageous interfaces for electrochemical bio-electrodes. Examples include the following: (1) the interface between a biomaterial and an artificial inorganic electrode material; (2) the hybrid electronic interface between an ionic carrier and an electron charge carrier; and (3) the extension of the planar electrode surface to a three-dimensional (3D) porous surface. CPHs with rationally designed 3D nanostructures and molecular structures are advantageous for enhancing the biocompatibility of the electrode, improving enzyme immobilization, creating protective layers to control diffusion, and wiring the electron transference. This review presents a brief overview of the current state-of-the-art research in electrochemical biosensors based on CPHs and describes future directions.
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Affiliation(s)
- Lanlan Li
- School of Electronic Science and Engineering, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China.
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9
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Kamal T, Park SY. Shape-responsive actuator from a single layer of a liquid-crystal polymer. ACS APPLIED MATERIALS & INTERFACES 2014; 6:18048-18054. [PMID: 25243321 DOI: 10.1021/am504910h] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Actuation of various shape changes, including bending, helical twisting, and reversible hinging, has been achieved from a single-layer sheet of poly(1,4-di(4-(3-acryloyloxypropyloxy)benzoyloxy)-2-methylbenzene) [poly(RM257)]. This actuator was developed through photopolymerization of a reactive liquid-crystal (LC) monomer (RM257) mixed with 4-pentyl-4'-cyanobiphenyl (5CB, nematic LC at room temperature) in a planar polyimide-coated LC cell. The UV beam perpendicular to one side of the LC cell produced an asymmetric phase separation between the poly(RM257) network and 5CB that resulted in an asymmetric porous structure along the thickness direction when the 5CB was extracted, in which the UV-exposed surface was pore-free and compact while the opposite surface was highly porous. As a result of this structure, the dry and curled poly(RM257) film exhibits actuation behavior when placed in acetone because of a difference in swelling between the two morphologically different sides, the film UV-exposed and nonexposed sides. The actuation of a three-dimensional tetrahedron (pyramidal) structure is also demonstrated for the first time by using a simple photopatterning technique to selectively control its asymmetric morphology at specific locations.
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Affiliation(s)
- Tahseen Kamal
- School of Applied Chemical Engineering, Department of Polymer Science and Engineering, Kyungpook National University , #1370 Sangyuk-dong, Buk-gu, Daegu 702-701, Korea
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10
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Kumar A, Samal SK, Dash R, Ojha U. Polyacryloyl hydrazide based injectable & stimuli responsive hydrogels with tunable properties. J Mater Chem B 2014; 2:7429-7439. [DOI: 10.1039/c4tb01257g] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The synthesis and characterization of a series of injectable and stimuli responsive hydrogels based on polyacryloyl hydrazide have been accomplished using dimethyl 2,2′-thiodiacetate, acrylic acid, diethyl malonate and polyethylene glycol diacrylate as cross-linkers through a chemical or dual cross-linking pathway.
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Affiliation(s)
- Anuj Kumar
- Department of Chemistry
- Rajiv Gandhi Institute of Petroleum Technology Raebareli
- , India
| | | | | | - Umaprasana Ojha
- Department of Chemistry
- Rajiv Gandhi Institute of Petroleum Technology Raebareli
- , India
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Song G, Zhang L, He C, Fang DC, Whitten PG, Wang H. Facile Fabrication of Tough Hydrogels Physically Cross-Linked by Strong Cooperative Hydrogen Bonding. Macromolecules 2013. [DOI: 10.1021/ma401053c] [Citation(s) in RCA: 148] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Guoshan Song
- Beijing
Key Laboratory of Energy Conversion and Storage Materials, College
of Chemistry, Beijing Normal University, Beijing 100875, China
| | - Lei Zhang
- Key
Laboratory of Theoretical
and Computational Photochemistry, Ministry of Education, College of
Chemistry, Beijing Normal University, Beijing 100875, China
| | - Changcheng He
- Beijing
Key Laboratory of Energy Conversion and Storage Materials, College
of Chemistry, Beijing Normal University, Beijing 100875, China
| | - De-Cai Fang
- Key
Laboratory of Theoretical
and Computational Photochemistry, Ministry of Education, College of
Chemistry, Beijing Normal University, Beijing 100875, China
| | - Philip G. Whitten
- School of Mechanical, Materials & Mechatronic Engineering, Faculty of Engineering, University of Wollongong, Wollongong NSW 2522, Australia
| | - Huiliang Wang
- Beijing
Key Laboratory of Energy Conversion and Storage Materials, College
of Chemistry, Beijing Normal University, Beijing 100875, China
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12
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Shin SR, Bae H, Cha JM, Mun JY, Chen YC, Tekin H, Shin H, Zarabi S, Dokmeci MR, Tang S, Khademhosseini A. Carbon nanotube reinforced hybrid microgels as scaffold materials for cell encapsulation. ACS NANO 2012; 6:362-72. [PMID: 22117858 PMCID: PMC3401631 DOI: 10.1021/nn203711s] [Citation(s) in RCA: 301] [Impact Index Per Article: 25.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
Hydrogels that mimic biological extracellular matrix (ECM) can provide cells with mechanical support and signaling cues to regulate their behavior. However, despite the ability of hydrogels to generate artificial ECM that can modulate cellular behavior, they often lack the mechanical strength needed for many tissue constructs. Here, we present reinforced CNT-gelatin methacrylate (GelMA) hybrid as a biocompatible, cell-responsive hydrogel platform for creating cell-laden three-dimensional (3D) constructs. The addition of carbon nanotubes (CNTs) successfully reinforced GelMA hydrogels without decreasing their porosity or inhibiting cell growth. The CNT-GelMA hybrids were also photopatternable allowing for easy fabrication of microscale structures without harsh processes. NIH-3T3 cells and human mesenchymal stem cells (hMSCs) readily spread and proliferated after encapsulation in CNT-GelMA hybrid microgels. By controlling the amount of CNTs incorporated into the GelMA hydrogel system, we demonstrated that the mechanical properties of the hybrid material can be tuned making it suitable for various tissue engineering applications. Furthermore, due to the high pattern fidelity and resolution of CNT incorporated GelMA, it can be used for in vitro cell studies or fabricating complex 3D biomimetic tissue-like structures.
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Affiliation(s)
- Su Ryon Shin
- Center for Biomedical Engineering, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, 65 Landsdowne Street, Cambridge, Massachusetts 02139, USA
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Ali M, Ueki T, Tsurumi D, Hirai T. Influence of plasticizer content on the transition of electromechanical behavior of PVC gel actuator. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2011; 27:7902-7908. [PMID: 21604779 DOI: 10.1021/la2009489] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
The actuation performance of plasticized poly(vinyl chloride) (PVC) gel actuators in an electric field depends on their chemical composition and electrical and mechanical properties. The influence of plasticizer (dibutyl adipate) content on electromechanical behavior of PVC gels was investigated by impedance spectroscopy and space charge measurement. By plasticizing the PVC, the dielectric constant and space charge density of PVC gel were drastically increased at 1:2 w/w ratio of PVC to plasticizer. To apply the results obtained from the impedance spectroscopy and space charge measurement, electrostatic adhesive forces generated between the PVC gel and the anode were measured. The electrostatic adhesive force at the anode was also dramatically increased at the same plasticizer content. All of the results indicated a transition of electromechanical behavior of PVC gel in the electric field, which was considered to originate from the orientation of polarized plasticizer molecules and dipole rotation of PVC chains. By using the electrostatic adhesive force of PVC gel derived from the electromechanical transition, a new electroactive actuator can be developed for novel applications.
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Affiliation(s)
- Mohammad Ali
- Smart Materials Engineering, Faculty of Textile Science and Technology, Shinshu University, 3-15-1 Tokida, Ueda, Nagano 386-8567, Japan
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Shin SR, Park SJ, Yoon SG, Lee CK, Shin KM, Gu BK, Shin MK, Kim MS, Kim YJ, Kim SJ. Anomalous pH Actuation of a Chitosan/SWNT Microfiber Hydrogel with Improved Mechanical Property. ACTA ACUST UNITED AC 2011. [DOI: 10.1557/proc-0915-r01-05] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
AbstractComposite fibers composed of chitosan and single-wall carbon nanotubes (CNTs) have been fabricated using a wet spinning method. The dispersion was improved by the sonic agitation of the CNTs in a chitosan solution followed by centrifugation to remove tube aggregates and any residual catalyst. The mechanical behavior was investigated using a dynamic mechanical analyzer (DMA). The mechanical tests showed a dramatic increase in Young's modulus for the chitosan/CNT composite fibers fabricated using the improved dispersion method. The strain on the microfibers was determined from tensile load measurements during pH switching in acidic or basic electrolyte solutions. The microfibers showed a general actuation behavior of expanding at pH = 2 and contracting at pH = 7 under low tensile loads. However, a reverse of this actuation behavior was exhibited under high tensile loads. This anomalous pH actuation is both new and surprising. It was explained from an analysis of the differences in sample stiffness and Poisson’s ratio under tensile load in electrolyte solutions with different pH values.
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Jeong KU, Jang JH, Kim DY, Nah C, Lee JH, Lee MH, Sun HJ, Wang CL, Cheng SZD, Thomas EL. Three-dimensional actuators transformed from the programmed two-dimensional structures via bending, twisting and folding mechanisms. ACTA ACUST UNITED AC 2011. [DOI: 10.1039/c0jm03631e] [Citation(s) in RCA: 128] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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16
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Milosavljević NB, Milašinović NZ, Popović IG, Filipović JM, Kalagasidis Krušić MT. Preparation and characterization of pH-sensitive hydrogels based on chitosan, itaconic acid and methacrylic acid. POLYM INT 2010. [DOI: 10.1002/pi.2967] [Citation(s) in RCA: 73] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Wu DC, Loh XJ, Wu YL, Lay CL, Liu Y. ‘Living’ Controlled in Situ Gelling Systems: Thiol−Disulfide Exchange Method toward Tailor-Made Biodegradable Hydrogels. J Am Chem Soc 2010; 132:15140-3. [DOI: 10.1021/ja106639c] [Citation(s) in RCA: 88] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- De-Cheng Wu
- Institute of Materials Research and Engineering, A*STAR (Agency for Science, Technology and Research), 3 Research Link, Singapore 117602
| | - Xian Jun Loh
- Institute of Materials Research and Engineering, A*STAR (Agency for Science, Technology and Research), 3 Research Link, Singapore 117602
| | - Yun-Long Wu
- Institute of Materials Research and Engineering, A*STAR (Agency for Science, Technology and Research), 3 Research Link, Singapore 117602
| | - Chee Leng Lay
- Institute of Materials Research and Engineering, A*STAR (Agency for Science, Technology and Research), 3 Research Link, Singapore 117602
| | - Ye Liu
- Institute of Materials Research and Engineering, A*STAR (Agency for Science, Technology and Research), 3 Research Link, Singapore 117602
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Marcasuzaa P, Reynaud S, Ehrenfeld F, Khoukh A, Desbrieres J. Chitosan-graft-Polyaniline-Based Hydrogels: Elaboration and Properties. Biomacromolecules 2010; 11:1684-91. [DOI: 10.1021/bm100379z] [Citation(s) in RCA: 94] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- P. Marcasuzaa
- Universite de Pau et des Pays de l’Adour (UPPA), IPREM/EPCP, UMR 5254 CNRS/UPPA, Helioparc Pau Pyrenees, 2 Avenue P. Angot, 64053 PAU cedex 09, France
| | - S. Reynaud
- Universite de Pau et des Pays de l’Adour (UPPA), IPREM/EPCP, UMR 5254 CNRS/UPPA, Helioparc Pau Pyrenees, 2 Avenue P. Angot, 64053 PAU cedex 09, France
| | - F. Ehrenfeld
- Universite de Pau et des Pays de l’Adour (UPPA), IPREM/EPCP, UMR 5254 CNRS/UPPA, Helioparc Pau Pyrenees, 2 Avenue P. Angot, 64053 PAU cedex 09, France
| | - A. Khoukh
- Universite de Pau et des Pays de l’Adour (UPPA), IPREM/EPCP, UMR 5254 CNRS/UPPA, Helioparc Pau Pyrenees, 2 Avenue P. Angot, 64053 PAU cedex 09, France
| | - J. Desbrieres
- Universite de Pau et des Pays de l’Adour (UPPA), IPREM/EPCP, UMR 5254 CNRS/UPPA, Helioparc Pau Pyrenees, 2 Avenue P. Angot, 64053 PAU cedex 09, France
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Mi P, Ju XJ, Xie R, Wu HG, Ma J, Chu LY. A novel stimuli-responsive hydrogel for K+-induced controlled-release. POLYMER 2010. [DOI: 10.1016/j.polymer.2010.02.018] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Jeong KU, Jang JH, Koh CY, Graham MJ, Jin KY, Park SJ, Nah C, Lee MH, Cheng SZD, Thomas EL. Colour-tunable spiral photonic actuators. ACTA ACUST UNITED AC 2009. [DOI: 10.1039/b822980p] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Wu J, Yi T, Zou Y, Xia Q, Shu T, Liu F, Yang Y, Li F, Chen Z, Zhou Z, Huang C. Gelation induced reversible syneresis via structural evolution. ACTA ACUST UNITED AC 2009. [DOI: 10.1039/b900049f] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Shinohara SI, Seki T, Sakai T, Yoshida R, Takeoka Y. Photoregulated Wormlike Motion of a Gel. Angew Chem Int Ed Engl 2008; 47:9039-43. [DOI: 10.1002/anie.200803046] [Citation(s) in RCA: 98] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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23
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Shinohara SI, Seki T, Sakai T, Yoshida R, Takeoka Y. Photoregulated Wormlike Motion of a Gel. Angew Chem Int Ed Engl 2008. [DOI: 10.1002/ange.200803046] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Mi P, Chu LY, Ju XJ, Niu CH. A Smart Polymer with Ion-Induced Negative Shift of the Lower Critical Solution Temperature for Phase Transition. Macromol Rapid Commun 2008. [DOI: 10.1002/marc.200700546] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Ni H, Kawaguchi H, Endo T. Characteristics of pH-sensitive hydrogel microsphere of poly(acrylamide-co-methacrylic acid) with sharp pH–volume transition. Colloid Polym Sci 2007. [DOI: 10.1007/s00396-006-1633-1] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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