51
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Montero de Espinosa L, Meesorn W, Moatsou D, Weder C. Bioinspired Polymer Systems with Stimuli-Responsive Mechanical Properties. Chem Rev 2017; 117:12851-12892. [DOI: 10.1021/acs.chemrev.7b00168] [Citation(s) in RCA: 228] [Impact Index Per Article: 32.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Affiliation(s)
| | - Worarin Meesorn
- Adolphe Merkle Institute, University of Fribourg, Chemin des Verdiers 4, 1700 Fribourg, Switzerland
| | - Dafni Moatsou
- Adolphe Merkle Institute, University of Fribourg, Chemin des Verdiers 4, 1700 Fribourg, Switzerland
| | - Christoph Weder
- Adolphe Merkle Institute, University of Fribourg, Chemin des Verdiers 4, 1700 Fribourg, Switzerland
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52
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Affiliation(s)
- Kengo Arai
- Department
of Symbiotic Science of Environment and Natural Resources,
The United Graduate School of Agriculture, and ‡Division of Natural Resources and
Eco-materials, Graduate School of Agriculture Science, Tokyo University of Agriculture and Technology, 3-5-8
Saiwai-cho, Fuchu, Tokyo 183-8509, Japan
| | - Toshiyuki Shikata
- Department
of Symbiotic Science of Environment and Natural Resources,
The United Graduate School of Agriculture, and ‡Division of Natural Resources and
Eco-materials, Graduate School of Agriculture Science, Tokyo University of Agriculture and Technology, 3-5-8
Saiwai-cho, Fuchu, Tokyo 183-8509, Japan
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53
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Rotbaum Y, Parvari G, Eichen Y, Rittel D. Static and Dynamic Large Strain Properties of Methyl Cellulose Hydrogels. Macromolecules 2017. [DOI: 10.1021/acs.macromol.7b00270] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Yonatan Rotbaum
- Faculty of Mechanical Engineering and ‡Schulich Faculty of Chemistry, Technion, 3200008 Haifa, Israel
| | - Galit Parvari
- Faculty of Mechanical Engineering and ‡Schulich Faculty of Chemistry, Technion, 3200008 Haifa, Israel
| | - Yoav Eichen
- Faculty of Mechanical Engineering and ‡Schulich Faculty of Chemistry, Technion, 3200008 Haifa, Israel
| | - Daniel Rittel
- Faculty of Mechanical Engineering and ‡Schulich Faculty of Chemistry, Technion, 3200008 Haifa, Israel
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54
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Xu K, Li L, Cui M, Han Y, Karahan HE, Chow VTK, Xu C. Cold Chain-Free Storable Hydrogel for Infant-Friendly Oral Delivery of Amoxicillin for the Treatment of Pneumococcal Pneumonia. ACS APPLIED MATERIALS & INTERFACES 2017; 9:18440-18449. [PMID: 28513136 PMCID: PMC5465509 DOI: 10.1021/acsami.7b01462] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/30/2017] [Accepted: 05/17/2017] [Indexed: 06/07/2023]
Abstract
Pneumonia is the major cause of death in children under five, particularly in developing countries. Antibiotics such as amoxicillin greatly help in mitigating this problem. However, there is a lack of an infant/toddler-friendly formulation for countries with limited clean water orr electricity. Here, we report the development of a shear-thinning hydrogel system for the oral delivery of amoxicillin to infant/toddler patients, without the need of clean water and refrigeration. The hydrogel formulation consists of metolose (hydroxypropyl methylcellulose) and amoxicillin. It preserves the structural integrity of antibiotics and their antibacterial activity over 12 weeks at room temperature. Pharmacokinetic profiling of mice reveals that the hydrogel formulation increases the bioavailability of drugs by ∼18% compared to that with aqueous amoxicillin formulation. More importantly, oral gavage of this formulation in a mouse model of secondary pneumococcal pneumonia significantly ameliorates inflammatory infiltration and tissue damage in lungs, with a 10-fold reduction in bacterial counts compared to those in untreated ones. Given the remarkable antibacterial efficacy as well as the use of FDA-regulated ingredients (metolose and amoxicillin), the hydrogel formulation holds great promise for rapid clinical translation.
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Affiliation(s)
- Keming Xu
- School of Chemical
and Biomedical Engineering, Nanyang Technological
University, 70 Nanyang
Drive, 637457 Singapore
| | - Liang Li
- School of Biological Sciences, Nanyang Technological University, 60 Nanyang Drive, 637551 Singapore
| | - Mingyue Cui
- School of Chemical
and Biomedical Engineering, Nanyang Technological
University, 70 Nanyang
Drive, 637457 Singapore
| | - Yiyuan Han
- School of Chemical
and Biomedical Engineering, Nanyang Technological
University, 70 Nanyang
Drive, 637457 Singapore
| | - H. Enis Karahan
- School of Chemical
and Biomedical Engineering, Nanyang Technological
University, 70 Nanyang
Drive, 637457 Singapore
| | - Vincent T. K. Chow
- Department of Microbiology and Immunology,
Yong Loo Lin School of Medicine, National
University of Singapore, 5 Science Drive 2, 117545 Singapore
| | - Chenjie Xu
- School of Chemical
and Biomedical Engineering, Nanyang Technological
University, 70 Nanyang
Drive, 637457 Singapore
- NTU-Northwestern Institute for Nanomedicine, Nanyang Technological University, 50 Nanyang Avenue, 639798 Singapore
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55
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Supramolecular structure of methyl cellulose and lambda- and kappa-carrageenan in water: SAXS study using the string-of-beads model. Carbohydr Polym 2017; 172:184-196. [PMID: 28606524 DOI: 10.1016/j.carbpol.2017.04.048] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2017] [Revised: 04/11/2017] [Accepted: 04/18/2017] [Indexed: 12/24/2022]
Abstract
A detailed data analysis utilizing the string-of-beads model was performed on experimental small-angle X-ray scattering (SAXS) curves in a targeted structural study of three, very important, industrial polysaccharides. The results demonstrate the quality of performance for this model on three polymers with quite different thermal structural behavior. Furthermore, they show the advantages of the model used by way of excellent fits in the ranges where the classic approach to the small-angle scattering data interpretation fails and an additional 3D visualization of the model's molecular conformations and anticipated polysaccharide supramolecular structure. The importance of this study is twofold: firstly, the methodology used and, secondly, the structural details of important biopolymers that are widely applicable in practice.
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56
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Zheng J, Jung S, Schmidt PW, Lodge TP, Reineke TM. 2-Hydroxyethylcellulose and Amphiphilic Block Polymer Conjugates Form Mechanically Tunable and Nonswellable Hydrogels. ACS Macro Lett 2017; 6:145-149. [PMID: 35632884 DOI: 10.1021/acsmacrolett.6b00954] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Herein, we report a family of mechanically tunable, nonswellable hydrogels that are based on a 2-hydroxyethylcellulose (HEC) scaffold grafted with amphiphilic diblock copolymers. Poly[(oligo(ethylene glycol)methyl ether methacrylate]-b-poly(methyl methacrylate) (POEGMA-b-PMMA) diblock copolymers of different compositions were created via RAFT polymerization using an alkyne terminated macro chain transfer agent (CTA). 2-Hydroxyethylcellulose (HEC) was modified with azide groups and the diblock copolymers were attached to the backbone via the copper-catalyzed click reaction to yield HEC-g-(POEGMA-b-PMMA) graft terpolymers. The resulting conjugates were soluble in DMF and able to form hydrogels upon simple solvent exchange in water. By increasing the concentration of the conjugates in DMF, the storage moduli of the hydrogels increased and the pore size in the gel decreased. After hydrogel formation, the structures were also found to be nonswellable (no macroscopic volume change upon incubation in water), which is an important feature for retaining size and mechanical integrity of the gels over time. Moreover, these materials were able to be electrospun into fibers that, upon hydration, formed fibrous hydrogel structures. The nonswellable and tunable mechanical properties of these materials imply great potential for a variety of applications such as personal care, active delivery, and tissue engineering.
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Affiliation(s)
- Jukuan Zheng
- Department
of Chemistry and ‡Department of Chemical Engineering and Materials
Science, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Seyoung Jung
- Department
of Chemistry and ‡Department of Chemical Engineering and Materials
Science, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Peter W. Schmidt
- Department
of Chemistry and ‡Department of Chemical Engineering and Materials
Science, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Timothy P. Lodge
- Department
of Chemistry and ‡Department of Chemical Engineering and Materials
Science, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Theresa M. Reineke
- Department
of Chemistry and ‡Department of Chemical Engineering and Materials
Science, University of Minnesota, Minneapolis, Minnesota 55455, United States
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57
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Thompson BR, Horozov TS, Stoyanov SD, Paunov VN. An ultra melt-resistant hydrogel from food grade carbohydrates. RSC Adv 2017. [DOI: 10.1039/c7ra08590g] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
We have formulated an ultra melt-resistant composite hydrogel with tailorable rheology over a range of temperatures.
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Affiliation(s)
| | - Tommy S. Horozov
- School of Mathematics and Physical Sciences (Chemistry)
- University of Hull
- Hull
- UK
| | - Simeon D. Stoyanov
- Unilever R&D Vlaardingen
- 3133 AT Vlaardingen
- The Netherlands
- Laboratory of Physical Chemistry and Soft Matter
- Wageningen University
| | - Vesselin N. Paunov
- School of Mathematics and Physical Sciences (Chemistry)
- University of Hull
- Hull
- UK
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58
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Hu Z, Xu R, Cranston ED, Pelton RH. Stable Aqueous Foams from Cellulose Nanocrystals and Methyl Cellulose. Biomacromolecules 2016; 17:4095-4099. [PMID: 27936719 DOI: 10.1021/acs.biomac.6b01641] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Zhen Hu
- Department of Chemical Engineering, McMaster University, 1280 Main Street West, Hamilton, Ontario L8S 4L7, Canada
| | - Richard Xu
- Department of Chemical Engineering, McMaster University, 1280 Main Street West, Hamilton, Ontario L8S 4L7, Canada
| | - Emily D. Cranston
- Department of Chemical Engineering, McMaster University, 1280 Main Street West, Hamilton, Ontario L8S 4L7, Canada
| | - Robert H. Pelton
- Department of Chemical Engineering, McMaster University, 1280 Main Street West, Hamilton, Ontario L8S 4L7, Canada
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59
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Ginzburg VV, Sammler RL, Huang W, Larson RG. Anisotropic self-assembly and gelation in aqueous methylcellulose-theory and modeling. ACTA ACUST UNITED AC 2016. [DOI: 10.1002/polb.24065] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Valeriy V. Ginzburg
- The Dow Chemical Company, Core R&D, Materials Science; Midland Michigan 48674
| | - Robert L. Sammler
- The Dow Chemical Company, Core R&D, Materials Science; Midland Michigan 48674
| | - Wenjun Huang
- Department of Chemical Engineering; University of Michigan; Ann Arbor Michigan 48109
| | - Ronald G. Larson
- Department of Chemical Engineering; University of Michigan; Ann Arbor Michigan 48109
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60
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Huang W, Ramesh R, Jha PK, Larson RG. A Systematic Coarse-Grained Model for Methylcellulose Polymers: Spontaneous Ring Formation at Elevated Temperature. Macromolecules 2016. [DOI: 10.1021/acs.macromol.5b02373] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Wenjun Huang
- Department of Chemical Engineering, University of Michigan, Ann Arbor, Michigan 48109-2136, United States
| | - Rahul Ramesh
- Department of Chemical Engineering, University of Michigan, Ann Arbor, Michigan 48109-2136, United States
| | - Prateek K. Jha
- Department of Chemical Engineering, University of Michigan, Ann Arbor, Michigan 48109-2136, United States
| | - Ronald G. Larson
- Department of Chemical Engineering, University of Michigan, Ann Arbor, Michigan 48109-2136, United States
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61
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Chinnam PR, Mantravadi R, Jimenez JC, Dikin DA, Wunder SL. Lamellar, micro-phase separated blends of methyl cellulose and dendritic polyethylene glycol, POSS-PEG. Carbohydr Polym 2016; 136:19-29. [DOI: 10.1016/j.carbpol.2015.08.087] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2015] [Revised: 08/26/2015] [Accepted: 08/27/2015] [Indexed: 02/05/2023]
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62
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Glassman MJ, Olsen BD. Arrested Phase Separation of Elastin-like Polypeptide Solutions Yields Stiff, Thermoresponsive Gels. Biomacromolecules 2015; 16:3762-73. [PMID: 26545151 DOI: 10.1021/acs.biomac.5b01026] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The preparation of new responsive hydrogels is crucial for the development of soft materials for various applications, including additive manufacturing and biomedical implants. Here, we report the discovery of a new mechanism for forming physical hydrogels by the arrested phase separation of a subclass of responsively hydrophobic elastin-like polypeptides (ELPs). When moderately concentrated solutions of ELPs with the pentapeptide repeat (XPAVG)n (where X is either 20% or 60% valine with the remainder isoleucine) are warmed above their inverse transition temperature, phase separation becomes arrested, and hydrogels can be formed with shear moduli on the order of 0.1-1 MPa at 20 wt % in water. The longest stress relaxation times are well beyond 10(3) s. This result is surprising because ELPs are classically known for thermoresponsive coacervation that leads to macrophase separation, and solids are typically formed in the bulk or by supplemental cross-linking strategies. This new mechanism can form gels with remarkable mechanical behavior based on simple macromolecules that can be easily engineered. Small angle scattering experiments indicate that phase separation arrests to form a network of nanoscale domains, exhibiting rheological and structural features consistent with an arrested spinodal decomposition mechanism. Gel nanostructure can be modeled as a disordered bicontinuous network with interdomain, intradomain, and curvature length scales that can be controlled by sequence design and assembly conditions. These studies introduce a new class of reversible, responsive materials based on a classic artificial biopolymer that is a versatile platform to address critical challenges in industrial and medical applications.
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Affiliation(s)
- Matthew J Glassman
- Department of Chemical Engineering, Massachusetts Institute of Technology , 77 Massachusetts Avenue, Room 66-153, Cambridge, Massachusetts 02139, United States
| | - Bradley D Olsen
- Department of Chemical Engineering, Massachusetts Institute of Technology , 77 Massachusetts Avenue, Room 66-153, Cambridge, Massachusetts 02139, United States
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63
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Ozbolat IT, Hospodiuk M. Current advances and future perspectives in extrusion-based bioprinting. Biomaterials 2015; 76:321-43. [PMID: 26561931 DOI: 10.1016/j.biomaterials.2015.10.076] [Citation(s) in RCA: 776] [Impact Index Per Article: 86.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2015] [Revised: 10/23/2015] [Accepted: 10/29/2015] [Indexed: 02/06/2023]
Abstract
Extrusion-based bioprinting (EBB) is a rapidly growing technology that has made substantial progress during the last decade. It has great versatility in printing various biologics, including cells, tissues, tissue constructs, organ modules and microfluidic devices, in applications from basic research and pharmaceutics to clinics. Despite the great benefits and flexibility in printing a wide range of bioinks, including tissue spheroids, tissue strands, cell pellets, decellularized matrix components, micro-carriers and cell-laden hydrogels, the technology currently faces several limitations and challenges. These include impediments to organ fabrication, the limited resolution of printed features, the need for advanced bioprinting solutions to transition the technology bench to bedside, the necessity of new bioink development for rapid, safe and sustainable delivery of cells in a biomimetically organized microenvironment, and regulatory concerns to transform the technology into a product. This paper, presenting a first-time comprehensive review of EBB, discusses the current advancements in EBB technology and highlights future directions to transform the technology to generate viable end products for tissue engineering and regenerative medicine.
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Affiliation(s)
- Ibrahim T Ozbolat
- Engineering Science and Mechanics Department, The Pennsylvania State University, University Park, PA, 16802, USA; The Huck Institutes of the Life Sciences, The Pennsylvania State University, University Park, PA, 16802, USA.
| | - Monika Hospodiuk
- Engineering Science and Mechanics Department, The Pennsylvania State University, University Park, PA, 16802, USA; The Huck Institutes of the Life Sciences, The Pennsylvania State University, University Park, PA, 16802, USA
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64
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McAllister JW, Schmidt PW, Dorfman KD, Lodge TP, Bates FS. Thermodynamics of Aqueous Methylcellulose Solutions. Macromolecules 2015. [DOI: 10.1021/acs.macromol.5b01544] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- John W. McAllister
- Department of Chemistry and ‡Department of Chemical Engineering & Materials Science, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Peter W. Schmidt
- Department of Chemistry and ‡Department of Chemical Engineering & Materials Science, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Kevin D. Dorfman
- Department of Chemistry and ‡Department of Chemical Engineering & Materials Science, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Timothy P. Lodge
- Department of Chemistry and ‡Department of Chemical Engineering & Materials Science, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Frank S. Bates
- Department of Chemistry and ‡Department of Chemical Engineering & Materials Science, University of Minnesota, Minneapolis, Minnesota 55455, United States
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65
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Nishimoto Y, Eguchi H, Shimoda E, Suzuki T. Analysis of Water State and Gelation of Methylcellulose Thermo-reversible Hydrogels by Thermal Analysis and NMR. ANAL SCI 2015; 31:929-34. [PMID: 26353960 DOI: 10.2116/analsci.31.929] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
The gelation of aqueous methylcellulose (MC) solutions containing polyethylene glycol (PEG) was studied by the combination of differential scanning calorimetry (DSC) and Raman spectrometry. The gelation of MC hydrogels containing PEG occurred in two-steps. First, the gel network was formed by the hydrophobic interaction between MC and PEG at 310 - 313 K, and then, the gel network was formed between MC chains at 323 K. On the other hand, in the MC hydrogels containing PEG and NaCl, sodium ion assumed to be enclosed by PEG, forming a helix with the hydrophobic groups outward. The sodium ion in the gel was expected to be surrounded by the ether oxygen of PEG as crown ether.
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Affiliation(s)
- Yuko Nishimoto
- Department of Chemistry, Faculty of Science, Kanagawa University
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66
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Ruocco N, Frielinghaus H, Vitiello G, D’Errico G, Leal LG, Richter D, Ortona O, Paduano L. How hydrophobically modified chitosans are stabilized by biocompatible lipid aggregates. J Colloid Interface Sci 2015; 452:160-168. [DOI: 10.1016/j.jcis.2015.03.058] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2015] [Revised: 03/31/2015] [Accepted: 03/31/2015] [Indexed: 01/02/2023]
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67
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Senses E, Isherwood A, Akcora P. Reversible Thermal Stiffening in Polymer Nanocomposites. ACS APPLIED MATERIALS & INTERFACES 2015; 7:14682-14689. [PMID: 26083305 DOI: 10.1021/acsami.5b02046] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Miscible polymer blends with different glass transition temperatures (Tg) are known to create confined interphases between glassy and mobile chains. Here, we show that nanoparticles adsorbed with a high-Tg polymer, poly(methyl methacrylate), and dispersed in a low-Tg matrix polymer, poly(ethylene oxide), exhibit a liquid-to-solid transition at temperatures above Tg's of both polymers. The mechanical adaptivity of nanocomposites to temperature underlies the existence of dynamically asymmetric bound layers on nanoparticles and more importantly reveals their impact on macroscopic mechanical response of composites. The unusual reversible stiffening behavior sets these materials apart from conventional polymer composites that soften upon heating. The presented stiffening mechanism in polymer nanocomposites can be used in applications for flexible electronics or mechanically induced actuators responding to environmental changes like temperature or magnetic fields.
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Affiliation(s)
- Erkan Senses
- Department of Chemical Engineering and Materials Science, Stevens Institute of Technology, Hoboken, New Jersey 07030, United States
| | - Andrew Isherwood
- Department of Chemical Engineering and Materials Science, Stevens Institute of Technology, Hoboken, New Jersey 07030, United States
| | - Pinar Akcora
- Department of Chemical Engineering and Materials Science, Stevens Institute of Technology, Hoboken, New Jersey 07030, United States
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68
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Liu Z, Yao P. Injectable thermo-responsive hydrogel composed of xanthan gum and methylcellulose double networks with shear-thinning property. Carbohydr Polym 2015; 132:490-8. [PMID: 26256374 DOI: 10.1016/j.carbpol.2015.06.013] [Citation(s) in RCA: 64] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2015] [Accepted: 06/05/2015] [Indexed: 11/18/2022]
Abstract
Injectable hydrogel precursor solution was prepared by physical blend of xanthan gum (XG) and methylcellulose (MC) in aqueous solution. Due to the formation of XG network composed of XG double helical strand structure, XG/MC blend was a high viscous solution with good shear-thinning property at room temperature. When the temperature was changed from 23 to 37 °C, thermo-responsive MC network formed, which caused XG/MC blend solution to gelate. The gelation time and storage modulus of the blend can be tuned by XG and/or MC concentrations. Both in vitro and in vivo investigations revealed that the blend solution immediately recovered its high viscosity and rapidly formed hydrogel at body temperature after injection using a syringe. In vivo biocompatibility and biodegradability of the hydrogel were validated by implantation of the hydrogel in rats. In vitro investigation demonstrated that XG/MC blend is a promising injectable hydrogel material for long-term drug delivery.
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Affiliation(s)
- Zhijia Liu
- State Key Laboratory of Molecular Engineering of Polymers, Collaborative Innovation Center of Polymers and Polymer Composite Materials, Department of Macromolecular Science, Fudan University, Shanghai 200433, China.
| | - Ping Yao
- State Key Laboratory of Molecular Engineering of Polymers, Collaborative Innovation Center of Polymers and Polymer Composite Materials, Department of Macromolecular Science, Fudan University, Shanghai 200433, China.
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69
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McAllister JW, Lott JR, Schmidt PW, Sammler RL, Bates FS, Lodge TP. Linear and Nonlinear Rheological Behavior of Fibrillar Methylcellulose Hydrogels. ACS Macro Lett 2015; 4:538-542. [PMID: 35596304 DOI: 10.1021/acsmacrolett.5b00150] [Citation(s) in RCA: 58] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Cryogenic transmission electron microscopy and small-angle neutron scattering recently have revealed that the well-known thermoreversible gelation of methylcellulose (MC) in water is due to the formation of fibrils, with a diameter of 15 ± 2 nm. Here we report that both the linear and nonlinear viscoelastic response of MC solutions and gels can be described by a filament-based mechanical model. In particular, large-amplitude oscillatory shear experiments show that aqueous MC materials transition from shear thinning to shear thickening behavior at the gelation temperature. The critical stress at which MC gels depart from the linear viscoelastic regime and begin to stiffen is well predicted from the filament model over a concentration range of 0.18-2.0 wt %. These predictions are based on fibril densities and persistence lengths obtained experimentally from neutron scattering, combined with cross-link spacings inferred from the gel modulus via the same model.
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Affiliation(s)
| | | | | | - Robert L. Sammler
- Materials
Science and Engineering, The Dow Chemical Company, Midland, Michigan 48674, United States
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70
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Methylcellulose, a Cellulose Derivative with Original Physical Properties and Extended Applications. Polymers (Basel) 2015. [DOI: 10.3390/polym7050777] [Citation(s) in RCA: 220] [Impact Index Per Article: 24.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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71
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Yuan X, Cheng G. From cellulose fibrils to single chains: understanding cellulose dissolution in ionic liquids. Phys Chem Chem Phys 2015; 17:31592-607. [DOI: 10.1039/c5cp05744b] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Continued improvement on the structure of elementary fibrils, simulation of larger elementary fibrils and systematic work on the solution structure of cellulose in ILs are three interacting modules to unravel the mechanism of cellulose dissolution in ILs.
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Affiliation(s)
- Xueming Yuan
- College of Life Science and Technology
- Beijing University of Chemical Technology
- Beijing
- China
| | - Gang Cheng
- College of Life Science and Technology
- Beijing University of Chemical Technology
- Beijing
- China
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72
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Huang W, Dalal IS, Larson RG. Analysis of Solvation and Gelation Behavior of Methylcellulose Using Atomistic Molecular Dynamics Simulations. J Phys Chem B 2014; 118:13992-4008. [DOI: 10.1021/jp509760x] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Wenjun Huang
- Department of Chemical Engineering, University of Michigan, Ann Arbor, Michigan 48109-2136, United States
| | - Indranil S. Dalal
- Department of Chemical Engineering, University of Michigan, Ann Arbor, Michigan 48109-2136, United States
| | - Ronald G. Larson
- Department of Chemical Engineering, University of Michigan, Ann Arbor, Michigan 48109-2136, United States
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73
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Jee AY, Curtis-Fisk JL, Granick S. Nanoparticle Diffusion in Methycellulose Thermoreversible Association Polymer. Macromolecules 2014. [DOI: 10.1021/ma501331z] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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74
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McKee JR, Hietala S, Seitsonen J, Laine J, Kontturi E, Ikkala O. Thermoresponsive Nanocellulose Hydrogels with Tunable Mechanical Properties. ACS Macro Lett 2014; 3:266-270. [PMID: 35590518 DOI: 10.1021/mz400596g] [Citation(s) in RCA: 143] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Cellulose microfibrils physically bound together by soft hemicellulose chains form the scaffolding that makes plant cell walls strong. Inspired by this architecture, we designed biomimetic thermoreversible hydrogel networks based on reinforcing cellulose nanocrystals (CNC) and thermoresponsive methylcellulose (MC). Upon dissolving MC powder in CNC aqueous dispersions, viscoelastic dispersions were formed at 20 °C, where the storage modulus (G') is tunable from 1.0 to 75 Pa upon increasing the CNC concentration from 0 to 3.5 wt % with 1.0 wt % MC. By contrast, at 60 °C a distinct gel state is obtained with G' ≫ G″, G' ∼ ω0, with an order of magnitude larger G' values from 110 to 900 Pa upon increasing the CNC concentration from 0 to 3.5 wt % with constant 1.0 wt % MC, due to the physical cross-links between MC and CNCs. Therefore, simply mixing two sustainable components leads to the first all-cellulose thermoreversible and tunable nanocellulose-based hydrogels.
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Affiliation(s)
| | - Sami Hietala
- Laboratory
of Polymer Chemistry, Department of Chemistry, University of Helsinki, P.O. Box 55, FIN-00014 HY, Helsinki, Finland
| | | | - Janne Laine
- Department
of Forest Products Technology, Aalto University, P.O. Box 16300, FIN-00076 Aalto, Espoo, Finland
| | - Eero Kontturi
- Department
of Forest Products Technology, Aalto University, P.O. Box 16300, FIN-00076 Aalto, Espoo, Finland
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75
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Lott JR, McAllister JW, Wasbrough M, Sammler RL, Bates FS, Lodge TP. Fibrillar Structure in Aqueous Methylcellulose Solutions and Gels. Macromolecules 2013. [DOI: 10.1021/ma4021642] [Citation(s) in RCA: 63] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Joseph R. Lott
- Department
of Chemistry, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - John W. McAllister
- Department
of Chemistry, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Matthew Wasbrough
- National Institute of Standards and Technology, Gaithersburg, Maryland 20899-1070, United States
- Department
of Chemical and Biomolecular Engineering, University of Delaware, Newark, Delaware 19716, United States
| | - Robert L. Sammler
- Materials
Science and Engineering, The Dow Chemical Company, Midland, Michigan 48674, United States
| | - Frank S. Bates
- Department of Chemical Engineering & Materials Science, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Timothy P. Lodge
- Department
of Chemistry, University of Minnesota, Minneapolis, Minnesota 55455, United States
- Department of Chemical Engineering & Materials Science, University of Minnesota, Minneapolis, Minnesota 55455, United States
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