1
|
Wu Z, Collins AM, Jayaraman A. Understanding Self-Assembly and Molecular Packing in Methylcellulose Aqueous Solutions Using Multiscale Modeling and Simulations. Biomacromolecules 2024; 25:1682-1695. [PMID: 38417021 DOI: 10.1021/acs.biomac.3c01209] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/01/2024]
Abstract
We present a multiscale molecular dynamics (MD) simulation study on self-assembly in methylcellulose (MC) aqueous solutions. First, using MD simulations with a new coarse-grained (CG) model of MC chains in implicit water, we establish how the MC chains self-assemble to form fibrils and fibrillar networks and elucidate the MC chains' packing within the assembled fibrils. The CG model for MC is extended from a previously developed model for unsubstituted cellulose and captures the directionality of H-bonding interactions between the -OH groups. The choice and placement of the CG beads within each monomer facilitates explicit modeling of the exact degree and position of methoxy substitutions in the monomers along the MC chain. CG MD simulations show that with increasing hydrophobic effect and/or increasing H-bonding strength, the commercial MC chains (with degree of methoxy substitution, DS, ∼1.8) assemble from a random dispersed configuration into fibrils. The assembled fibrils exhibit consistent fibril diameters regardless of the molecular weight and concentration of MC chains, in agreement with past experiments. Most MC chains' axes are aligned with the fibril axis, and some MC chains exhibit twisted conformations in the fibril. To understand the molecular driving force for the twist, we conduct atomistic simulations of MC chains preassembled in fibrils (without any chain twists) in explicit water at 300 and 348 K. These atomistic simulations also show that at DS = 1.8, MC chains adopt twisted conformations, with these twists being more prominent at higher temperatures, likely as a result of shielding of hydrophobic methyl groups from water. For MC chains with varying DS, at 348 K, atomistic simulations show a nonmonotonic effect of DS on water-monomer contacts. For 0.0 < DS < 0.6, the MC monomers have more water contacts than at DS = 0.0 or DS > 0.6, suggesting that with few methoxy substitutions, the MC chains are effectively hydrophilic, letting the water molecules diffuse into the fibril to participate in H-bonds with the MC chains' remaining -OH groups. At DS > 0.6, the MC monomers become increasingly hydrophobic, as seen by decreasing water contacts around each monomer. We conclude based on the atomistic observations that MC chains with lower degrees of substitutions (DS ≤ 0.6) should exhibit solubility in water over broader temperature ranges than DS ∼ 1.8 chains.
Collapse
Affiliation(s)
- Zijie Wu
- Department of Chemical and Biomolecular Engineering, University of Delaware, 150 Academy Street, Newark, Delaware 19716, United States
| | - Audrey M Collins
- Department of Chemistry and Biochemistry, University of Delaware, 102 Brown Laboratory, Newark, Delaware 19716, United States
| | - Arthi Jayaraman
- Department of Chemical and Biomolecular Engineering, University of Delaware, 150 Academy Street, Newark, Delaware 19716, United States
- Department of Materials Science and Engineering, University of Delaware, 201 DuPont Hall, Newark, Delaware 19716, United States
| |
Collapse
|
2
|
Bonetti L, De Nardo L, Farè S. Crosslinking strategies in modulating methylcellulose hydrogel properties. SOFT MATTER 2023; 19:7869-7884. [PMID: 37817578 DOI: 10.1039/d3sm00721a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/12/2023]
Abstract
Methylcellulose (MC) hydrogels are ideal materials for the design of thermo-responsive platforms capable of exploiting the environment temperature as a driving force to activate their smart transition. However, MC hydrogels usually show reduced stability in an aqueous environment and low mechanical properties, limiting their applications' breadth. A possible approach intended to overcome these limitations is chemical crosslinking, which represents a simple yet effective strategy to modify the MC hydrogels' properties (e.g., physicochemical, mechanical, and biological). In this regard, understanding the selected crosslinking method's role in modulating the MC hydrogels' properties is a key factor in their design. This review offers a perspective on the main MC chemical crosslinking approaches reported in the literature. Three main categories can be distinguished: (i) small molecule crosslinkers, (ii) crosslinking by high-energy radiation, and (iii) crosslinking via MC chemical modification. The advantages and limitations of each approach are elucidated, and special consideration is paid to the thermo-responsive properties after crosslinking towards the development of MC hydrogels with enhanced physical stability and mechanical performance, preserving the thermo-responsive behavior.
Collapse
Affiliation(s)
- Lorenzo Bonetti
- Department of Chemistry, Materials and Chemical Engineering "G. Natta", Politecnico di Milano, Piazza Leonardo da Vinci 22, 20133, Milan, Italy.
| | - Luigi De Nardo
- Department of Chemistry, Materials and Chemical Engineering "G. Natta", Politecnico di Milano, Piazza Leonardo da Vinci 22, 20133, Milan, Italy.
- National Interuniversity Consortium of Materials Science and Technology (INSTM), 50121 Florence, Italy
| | - Silvia Farè
- Department of Chemistry, Materials and Chemical Engineering "G. Natta", Politecnico di Milano, Piazza Leonardo da Vinci 22, 20133, Milan, Italy.
- National Interuniversity Consortium of Materials Science and Technology (INSTM), 50121 Florence, Italy
| |
Collapse
|
3
|
Peng Z, Zhu M, Yang J, Li L. How does Poly(ethylene glycol) with varied chain length affect the thermo-responsive behavior of methyl cellulose in aqueous solutions? POLYMER 2022. [DOI: 10.1016/j.polymer.2022.125510] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
|
4
|
Bizmark N, Caggiano NJ, Liu JX, Arnold CB, Prud'homme RK, Datta SS, Priestley RD. Hysteresis in the thermally induced phase transition of cellulose ethers. SOFT MATTER 2022; 18:6254-6263. [PMID: 35946517 DOI: 10.1039/d2sm00564f] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Functionalized cellulosics have shown promise as naturally derived thermoresponsive gelling agents. However, the dynamics of thermally induced phase transitions of these polymers at the lower critical solution temperature (LCST) are not fully understood. Here, with experiments and theoretical considerations, we address how molecular architecture dictates the mechanisms and dynamics of phase transitions for cellulose ethers. Above the LCST, we show that hydroxypropyl substituents favor the spontaneous formation of liquid droplets, whereas methyl substituents induce fibril formation through diffusive growth. In celluloses which contain both methyl and hydroxypropyl substituents, fibrillation initiates after liquid droplet formation, suppressing the fibril growth to a sub-diffusive rate. Unlike for liquid droplets, the dissolution of fibrils back into the solvated state occurs with significant thermal hysteresis. We tune this hysteresis by altering the content of substituted hydroxypropyl moieties. This work provides a systematic study to decouple competing mechanisms during the phase transition of multi-functionalized macromolecules.
Collapse
Affiliation(s)
- Navid Bizmark
- Princeton Institute for the Science and Technology of Materials, Princeton University, Princeton, New Jersey 08544, USA.
- Department of Chemical and Biological Engineering, Princeton University, Princeton, New Jersey 08544, USA
| | - Nicholas J Caggiano
- Department of Chemical and Biological Engineering, Princeton University, Princeton, New Jersey 08544, USA
| | - Jason X Liu
- Princeton Institute for the Science and Technology of Materials, Princeton University, Princeton, New Jersey 08544, USA.
- Department of Mechanical and Aerospace Engineering, Princeton University, Princeton, New Jersey 08544, USA
| | - Craig B Arnold
- Department of Chemical and Biological Engineering, Princeton University, Princeton, New Jersey 08544, USA
- Department of Mechanical and Aerospace Engineering, Princeton University, Princeton, New Jersey 08544, USA
| | - Robert K Prud'homme
- Department of Chemical and Biological Engineering, Princeton University, Princeton, New Jersey 08544, USA
| | - Sujit S Datta
- Department of Chemical and Biological Engineering, Princeton University, Princeton, New Jersey 08544, USA
| | - Rodney D Priestley
- Princeton Institute for the Science and Technology of Materials, Princeton University, Princeton, New Jersey 08544, USA.
- Department of Chemical and Biological Engineering, Princeton University, Princeton, New Jersey 08544, USA
| |
Collapse
|
5
|
Saiki E, Yoshida M, Kurahashi K, Iwase H, Shikata T. Elongated Rodlike Particle Formation of Methyl Cellulose in Aqueous Solution. ACS OMEGA 2022; 7:28849-28859. [PMID: 36033728 PMCID: PMC9404515 DOI: 10.1021/acsomega.2c01859] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/27/2022] [Accepted: 07/22/2022] [Indexed: 06/15/2023]
Abstract
The conformation and structure of methyl cellulose (MC) ether samples dissolved in pure water under dilute conditions were carefully reconsidered based on the results obtained using small-to-wide-angle neutron scattering (S-WANS), static light scattering (SLS), dynamic light scattering (DLS), and viscometric techniques. The examined MC samples possessed an average degree of substitution by methyl groups per glucose unit of ca 1.8 and weight average molar masses (M w), ranging from 23 to 790 kg mol-1. S-WANS experiments clearly demonstrated that the samples possess highly elongated rigid rodlike local structures in deuterium oxide solutions with weak periodicities of ca 0.4 and 1.0 nm on a length scale, which correspond to the average intermolecular distance between molecular chain portions facing each other in the formed rodlike structure and the repeating length of the monomeric cellobiose unit of molecular chains, respectively. Ratios of the particle length (L) to the radius of gyration (R g) determined by SLS techniques approximately showed the relationship LR g -1 = holding in rigid rods over the entire M w range examined in this study. However, the folding number, defined as the ratio of the average molecular contour length (l) to L, remained at the value of lL -1 ∼ 2, representing an elongated one-folded hairpin structure, until M w ∼ 300 kg mol-1 and increased substantially up to ca 4.9 at the highest M w of 790 kg mol-1. The observed increase in the lL -1 value corresponded well with an increase in the diameter of the formed rod with increasing M w observed in the S-WANS data. The M w dependencies of the translational diffusion coefficient determined via DLS measurements and that of the intrinsic viscosity detected via viscometric techniques also distinctly demonstrated that particles formed by the MC samples dissolved in aqueous solution behave as elongated rigid rods irrespective of M w.
Collapse
Affiliation(s)
- Erika Saiki
- Cellulose
Research Unit, Tokyo University of Agriculture
and Technology, 3-5-8
Saiwai-cho, Fuchu, Tokyo 183-8509, Japan
- Division
of Natural Resources and Eco-materials, Graduate School of Agriculture, Tokyo University of Agriculture and Technology, 3-5-8 Saiwai-cho, Fuchu, Tokyo 183-8509, Japan
| | - Misato Yoshida
- Cellulose
Research Unit, Tokyo University of Agriculture
and Technology, 3-5-8
Saiwai-cho, Fuchu, Tokyo 183-8509, Japan
- Division
of Natural Resources and Eco-materials, Graduate School of Agriculture, Tokyo University of Agriculture and Technology, 3-5-8 Saiwai-cho, Fuchu, Tokyo 183-8509, Japan
| | - Kei Kurahashi
- Cellulose
Research Unit, Tokyo University of Agriculture
and Technology, 3-5-8
Saiwai-cho, Fuchu, Tokyo 183-8509, Japan
- Division
of Natural Resources and Eco-materials, Graduate School of Agriculture, Tokyo University of Agriculture and Technology, 3-5-8 Saiwai-cho, Fuchu, Tokyo 183-8509, Japan
| | - Hiroki Iwase
- Neutron
Science and Technology Center, Comprehensive
Research Organization for Science and Society (CROSS), 162-1 Shirakata, Tokai, Ibaraki 319-1106, Japan
| | - Toshiyuki Shikata
- Cellulose
Research Unit, Tokyo University of Agriculture
and Technology, 3-5-8
Saiwai-cho, Fuchu, Tokyo 183-8509, Japan
- Division
of Natural Resources and Eco-materials, Graduate School of Agriculture, Tokyo University of Agriculture and Technology, 3-5-8 Saiwai-cho, Fuchu, Tokyo 183-8509, Japan
| |
Collapse
|
6
|
Yi H, Wang Y, Luo G. Unveiling the mechanism of methylcellulose-templated synthesis of Al 2O 3 microspheres with organic solvents as swelling agents in microchannel. J Colloid Interface Sci 2022; 628:31-42. [PMID: 35908429 DOI: 10.1016/j.jcis.2022.07.131] [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: 04/11/2022] [Revised: 07/14/2022] [Accepted: 07/20/2022] [Indexed: 11/29/2022]
Abstract
Herein, we report a systematic investigation of the preparation of large-pore-volume Al2O3 microspheres using a complex synthesis system with methylcellulose (MC) as the template and gelation initiator and organic solvents as the swelling agent and carrier medium under the flow characteristics of a coaxial microchannel. The adsorption of MC micelles on boehmite colloidal nanoparticles (NPs) was proven and determined by interfacial tension measurements, dynamic light scattering, and cryogenic transmission electron microscopy. Isothermal titration calorimetry demonstrated that the adsorption process was caused by nonspecific hydrophobicity; one binding site was involved, and the affinity constant was 1060 M-1. When the MC:NPs mass ratio exceeded 0.1, the template-NP bridged each other to form large aggregates, thereby forming large mesopores and enhancing the gelation speed. Alkanes, alcohols, and amines were applied to further enhance the porosity, and the swelling capacities were investigated experimentally and theoretically. Amines were efficient swelling agents owing to their excellent ability to swell MC micelles and insert into the acid colloid network. The coaxial microchannel was subjected to molding; this process significantly influenced the morphology and textural properties owing to the internal circulation during droplet formation. When trihexylamine with suitable steric hindrance, alkalinity, and polarity was used as the swelling agent, the microspheres exhibited an optimal specific surface area of 403 m2/g and a pore volume of 1.85 cm3/g.
Collapse
Affiliation(s)
- Huilin Yi
- State Key Lab of Chemical Engineering, Department of Chemical Engineering, Tsinghua University, Beijing 100084, PR China
| | - Yujun Wang
- State Key Lab of Chemical Engineering, Department of Chemical Engineering, Tsinghua University, Beijing 100084, PR China.
| | - Guangsheng Luo
- State Key Lab of Chemical Engineering, Department of Chemical Engineering, Tsinghua University, Beijing 100084, PR China
| |
Collapse
|
7
|
Almásy L, Artykulnyi OP, Petrenko VI, Ivankov OI, Bulavin LA, Yan M, Haramus VM. Structure and Intermolecular Interactions in Aqueous Solutions of Polyethylene Glycol. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27082573. [PMID: 35458769 PMCID: PMC9024505 DOI: 10.3390/molecules27082573] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/26/2022] [Revised: 04/07/2022] [Accepted: 04/11/2022] [Indexed: 11/16/2022]
Abstract
Aqueous solutions of polyethylene glycol are studied by small-angle neutron scattering over a broad range of polymer molecular masses and concentrations. The scattering data were modeled by a Gaussian chain form factor combined with random phase approximation, which provided good fits over the whole studied concentration range. The results showed that polyethylene glycol in the molecular mass range 0.4–20 kDa in water at physiological temperature T = 37 °C behaves like a random coil in nearly theta solvent conditions. The obtained results serve as a reference for the description of complex mixtures with PEG used in various applications.
Collapse
Affiliation(s)
- László Almásy
- State Key Laboratory of Environment-Friendly Energy Materials, Southwest University of Science and Technology, Mianyang 621010, China;
- Institute for Energy Security and Environmental Safety, Centre for Energy Research, Konkoly-Thege Miklós út 29-33, 1121 Budapest, Hungary
- Correspondence: (L.A.); (V.M.H.)
| | - Oleksandr P. Artykulnyi
- Faculty of Physics, Taras Shevchenko Kyiv National University, 01601 Kyiv, Ukraine; (O.P.A.); (O.I.I.); (L.A.B.)
| | - Viktor I. Petrenko
- BCMaterials, Basque Centre for Materials, Applications and Nanostructures, 48940 Leioa, Spain;
- IKERBASQUE, Basque Foundation for Science, 48009 Bilbao, Spain
| | - Oleksandr I. Ivankov
- Faculty of Physics, Taras Shevchenko Kyiv National University, 01601 Kyiv, Ukraine; (O.P.A.); (O.I.I.); (L.A.B.)
| | - Leonid A. Bulavin
- Faculty of Physics, Taras Shevchenko Kyiv National University, 01601 Kyiv, Ukraine; (O.P.A.); (O.I.I.); (L.A.B.)
| | - Minhao Yan
- State Key Laboratory of Environment-Friendly Energy Materials, Southwest University of Science and Technology, Mianyang 621010, China;
| | - Vasil M. Haramus
- Helmholtz-Zentrum Hereon, Max-Planck-Street 1, 21502 Geesthacht, Germany
- Correspondence: (L.A.); (V.M.H.)
| |
Collapse
|
8
|
Nelson AZ, Wang Y, Wang Y, Margotta AS, Sammler RL, Izmitli A, Katz JS, Curtis-Fisk J, Li Y, Ewoldt RH. Gelation under stress: impact of shear flow on the formation and mechanical properties of methylcellulose hydrogels. SOFT MATTER 2022; 18:1554-1565. [PMID: 35107466 DOI: 10.1039/d1sm01711j] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
We demonstrate that small unidirectional applied-stresses during temperature-induced gelation dramatically change the gel temperature and the resulting mechanical properties and structure of aqueous methylcellulose (MC), a material that forms a brittle gel with a fibrillar microstructure at elevated temperatures. Applied stress makes gelation more difficult, evidenced by an increased gelation temperature, and weakens mechanical properties of the hot gel, evidenced by a decreased elastic modulus and decreased apparent failure stress. In extreme cases, formation of a fully percolated polymer network is inhibited and a soft granular yield-stress fluid is formed. We quantify the effects of the applied stress using a filament-based mechanical model to relate the measured properties to the structural features of the fibril network. The dramatic changes in the gel temperature and hot gel properties give more design freedom to processing-dependent rheology, but could be detrimental to coating applications where gravitational stress during gelation is unavoidable.
Collapse
Affiliation(s)
- Arif Z Nelson
- Department of Mechanical Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA.
| | - Yilin Wang
- Department of Mechanical Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA.
| | - Yushi Wang
- Department of Mechanical Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA.
| | - Anthony S Margotta
- Department of Mechanical Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA.
| | - Robert L Sammler
- Formulation, Automation, and Material Science and Engineering, Corporate R&D, Dow Inc., Midland, MI 48674, USA
| | - Aslin Izmitli
- Home and Personal Care TS&D, Dow Inc., Collegeville, PA 19426, USA
| | - Joshua S Katz
- Pharma Solutions R&D, International Flavors & Fragrances, Wilmington, DE 19803, USA
| | - Jaime Curtis-Fisk
- Formulation, Automation, and Material Science and Engineering, Corporate R&D, Dow Inc., Midland, MI 48674, USA
| | - Yongfu Li
- Analytical Science, Corporate R&D, Dow Inc., Midland, MI 48674, USA
| | - Randy H Ewoldt
- Department of Mechanical Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA.
| |
Collapse
|
9
|
Coughlin ML, Edmund J, Bates FS, Lodge TP. Temperature Dependence of Chain Conformations and Fibril Formation in Solutions of Poly(N-isopropylacrylamide)-Grafted Methylcellulose. Macromolecules 2022. [DOI: 10.1021/acs.macromol.1c02206] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- McKenzie L. Coughlin
- Department of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Jerrick Edmund
- Department of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Frank S. Bates
- Department of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Timothy P. Lodge
- Department of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, Minnesota 55455, United States
- Department of Chemistry, University of Minnesota, Minneapolis, Minnesota 55455, United States
| |
Collapse
|
10
|
Liberman L, Schmidt PW, Coughlin ML, Ya’akobi AM, Davidovich I, Edmund J, Ertem SP, Morozova S, Talmon Y, Bates FS, Lodge TP. Salt-Dependent Structure in Methylcellulose Fibrillar Gels. Macromolecules 2021. [DOI: 10.1021/acs.macromol.0c02429] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Lucy Liberman
- Department of Chemical Engineering & Materials Science, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Peter W. Schmidt
- Department of Chemical Engineering & Materials Science, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - McKenzie L. Coughlin
- Department of Chemical Engineering & Materials Science, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Asia Matatyaho Ya’akobi
- Department of Chemical Engineering, and the Russell Berrie Nanotechnology Institute, Technion–Israel Institute of Technology, Haifa 3200003, Israel
| | - Irina Davidovich
- Department of Chemical Engineering, and the Russell Berrie Nanotechnology Institute, Technion–Israel Institute of Technology, Haifa 3200003, Israel
| | - Jerrick Edmund
- Department of Chemical Engineering & Materials Science, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - S. Piril Ertem
- Department of Chemistry, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Svetlana Morozova
- Department of Chemistry, University of Minnesota, Minneapolis, Minnesota 55455, United States
- Department of Macomolecular Science and Engineering, Case Western Reserve University, Cleveland, Ohio 44106, United States
| | - Yeshayahu Talmon
- Department of Chemical Engineering, and the Russell Berrie Nanotechnology Institute, Technion–Israel Institute of Technology, Haifa 3200003, Israel
| | - Frank S. Bates
- Department of Chemical Engineering & Materials Science, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Timothy P. Lodge
- Department of Chemical Engineering & Materials Science, University of Minnesota, Minneapolis, Minnesota 55455, United States
- Department of Chemistry, University of Minnesota, Minneapolis, Minnesota 55455, United States
| |
Collapse
|
11
|
Moore CA, Siddiqui Z, Carney GJ, Naaldijk Y, Guiro K, Ferrer AI, Sherman LS, Guvendiren M, Kumar VA, Rameshwar P. A 3D Bioprinted Material That Recapitulates the Perivascular Bone Marrow Structure for Sustained Hematopoietic and Cancer Models. Polymers (Basel) 2021; 13:480. [PMID: 33546275 PMCID: PMC7913313 DOI: 10.3390/polym13040480] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2020] [Revised: 01/28/2021] [Accepted: 01/29/2021] [Indexed: 12/11/2022] Open
Abstract
Translational medicine requires facile experimental systems to replicate the dynamic biological systems of diseases. Drug approval continues to lag, partly due to incongruencies in the research pipeline that traditionally involve 2D models, which could be improved with 3D models. The bone marrow (BM) poses challenges to harvest as an intact organ, making it difficult to study disease processes such as breast cancer (BC) survival in BM, and to effective evaluation of drug response in BM. Furthermore, it is a challenge to develop 3D BM structures due to its weak physical properties, and complex hierarchical structure and cellular landscape. To address this, we leveraged 3D bioprinting to create a BM structure with varied methylcellulose (M): alginate (A) ratios. We selected hydrogels containing 4% (w/v) M and 2% (w/v) A, which recapitulates rheological and ultrastructural features of the BM while maintaining stability in culture. This hydrogel sustained the culture of two key primary BM microenvironmental cells found at the perivascular region, mesenchymal stem cells and endothelial cells. More importantly, the scaffold showed evidence of cell autonomous dedifferentiation of BC cells to cancer stem cell properties. This scaffold could be the platform to create BM models for various diseases and also for drug screening.
Collapse
Affiliation(s)
- Caitlyn A. Moore
- Department of Medicine, Rutgers New Jersey Medical School, 185 South Orange Avenue, Newark, NJ 07103, USA; (C.A.M.); (G.J.C.); (Y.N.); (K.G.); (A.I.F.); (L.S.S.)
- Department of Medicine, Rutgers School of Graduate Studies, New Jersey Medical School, 185 South Orange Avenue, Newark, NJ 07103, USA
| | - Zain Siddiqui
- Department of Biomedical Engineering, New Jersey Institute of Technology, 323 Martin Luther King Jr. Blvd, Newark, NJ 07102, USA; (Z.S.); (M.G.); (V.A.K.)
| | - Griffin J. Carney
- Department of Medicine, Rutgers New Jersey Medical School, 185 South Orange Avenue, Newark, NJ 07103, USA; (C.A.M.); (G.J.C.); (Y.N.); (K.G.); (A.I.F.); (L.S.S.)
| | - Yahaira Naaldijk
- Department of Medicine, Rutgers New Jersey Medical School, 185 South Orange Avenue, Newark, NJ 07103, USA; (C.A.M.); (G.J.C.); (Y.N.); (K.G.); (A.I.F.); (L.S.S.)
| | - Khadidiatou Guiro
- Department of Medicine, Rutgers New Jersey Medical School, 185 South Orange Avenue, Newark, NJ 07103, USA; (C.A.M.); (G.J.C.); (Y.N.); (K.G.); (A.I.F.); (L.S.S.)
| | - Alejandra I. Ferrer
- Department of Medicine, Rutgers New Jersey Medical School, 185 South Orange Avenue, Newark, NJ 07103, USA; (C.A.M.); (G.J.C.); (Y.N.); (K.G.); (A.I.F.); (L.S.S.)
- Department of Medicine, Rutgers School of Graduate Studies, New Jersey Medical School, 185 South Orange Avenue, Newark, NJ 07103, USA
| | - Lauren S. Sherman
- Department of Medicine, Rutgers New Jersey Medical School, 185 South Orange Avenue, Newark, NJ 07103, USA; (C.A.M.); (G.J.C.); (Y.N.); (K.G.); (A.I.F.); (L.S.S.)
- Department of Medicine, Rutgers School of Graduate Studies, New Jersey Medical School, 185 South Orange Avenue, Newark, NJ 07103, USA
| | - Murat Guvendiren
- Department of Biomedical Engineering, New Jersey Institute of Technology, 323 Martin Luther King Jr. Blvd, Newark, NJ 07102, USA; (Z.S.); (M.G.); (V.A.K.)
- Department of Chemical, Biological and Pharmaceutical Engineering, New Jersey Institute of Technology, 323 Martin Luther King Jr. Blvd, Newark, NJ 07102, USA
| | - Vivek A. Kumar
- Department of Biomedical Engineering, New Jersey Institute of Technology, 323 Martin Luther King Jr. Blvd, Newark, NJ 07102, USA; (Z.S.); (M.G.); (V.A.K.)
- Department of Chemical, Biological and Pharmaceutical Engineering, New Jersey Institute of Technology, 323 Martin Luther King Jr. Blvd, Newark, NJ 07102, USA
- Department of Restorative Dentistry, Rutgers School of Dental Medicine, 110 Bergen St, Newark, NJ 07103, USA
| | - Pranela Rameshwar
- Department of Medicine, Rutgers New Jersey Medical School, 185 South Orange Avenue, Newark, NJ 07103, USA; (C.A.M.); (G.J.C.); (Y.N.); (K.G.); (A.I.F.); (L.S.S.)
| |
Collapse
|
12
|
|
13
|
Schmidt PW, Morozova S, Ertem SP, Coughlin ML, Davidovich I, Talmon Y, Reineke TM, Bates FS, Lodge TP. Internal Structure of Methylcellulose Fibrils. Macromolecules 2020. [DOI: 10.1021/acs.macromol.9b01773] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
| | | | | | | | - Irina Davidovich
- Department of Chemical Engineering, and the Russell Berrie Nanotechnology Institute, Technion—Israel Institute of Technology, Haifa 3200003, Israel
| | - Yeshayahu Talmon
- Department of Chemical Engineering, and the Russell Berrie Nanotechnology Institute, Technion—Israel Institute of Technology, Haifa 3200003, Israel
| | | | | | | |
Collapse
|
14
|
Arai K, Horikawa Y, Shikata T, Iwase H. Reconsideration of the conformation of methyl cellulose and hydroxypropyl methyl cellulose ethers in aqueous solution. RSC Adv 2020; 10:19059-19066. [PMID: 35518322 PMCID: PMC9053864 DOI: 10.1039/d0ra03437a] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2020] [Accepted: 05/08/2020] [Indexed: 11/21/2022] Open
Abstract
The structure and conformation of methyl cellulose (MC) and hydroxypropyl methyl cellulose (HpMC) ether samples dissolved in dilute aqueous (D2O) solutions at a temperature of 25 °C were reconsidered in detail based on the experimental results obtained using small- and wide-angle neutron scattering (S-WANS) techniques in a range of scattering vectors (q) from 0.05 to 100 nm−1. MC samples exhibited an average degree of substitution (DS) by methyl groups per glucose unit of DS = 1.8 and the weight average molar mass of Mw = 37 × 103 and 79 × 103 g mol−1. On the other hand, HpMC samples possessed the average molar substitution number (MS) by hydroxypropyl groups per glucose unit of MS = 0.25, DS = 1.9, and Mw = 50 × 103 and 71 × 103 g mol−1. The concentration-reduced scattering intensity data gathered into a curve for the solutions of identical sample species clearly demonstrated the relationship I(q)c−1 ∝ q−1 in a q range from 0.05 to 2.0 nm−1, and small interference peaks were found at q ∼ 7 and 17 nm−1 for all examined sample solutions. These observations strongly revealed that form factors for both the MC and HpMC samples were perfectly described with that for long, rigid rod particles with average diameters of 0.8 and 0.9 nm, respectively, and with an inner structure with characteristic mean spacing distances of ca. 0.9 and 0.37 nm, respectively, regardless of the chemically modified conditions and molar masses. A rationally speculated structure model for the MC and HpMC samples dissolved in aqueous solution was proposed. A rod-like structure with once-folded highly extended hairpin-like conformation is constructed from methyl and hydroxypropyl methyl cellulose ethers in aqueous solution.![]()
Collapse
Affiliation(s)
- Kengo Arai
- Department of Symbiotic Science of Environment and Natural Resources
- The United Graduate School of Agricultural Science
- Tokyo University of Agriculture and Technology
- Fuchu
- Japan
| | - Yoshiki Horikawa
- Department of Symbiotic Science of Environment and Natural Resources
- The United Graduate School of Agricultural Science
- Tokyo University of Agriculture and Technology
- Fuchu
- Japan
| | - Toshiyuki Shikata
- Department of Symbiotic Science of Environment and Natural Resources
- The United Graduate School of Agricultural Science
- Tokyo University of Agriculture and Technology
- Fuchu
- Japan
| | - Hiroki Iwase
- Neutron Science and Technology Center
- Comprehensive Research Organization for Science and Society (CROSS)
- Tokai
- Japan
| |
Collapse
|
15
|
Morozova S, Coughlin ML, Early JT, Ertem SP, Reineke TM, Bates FS, Lodge TP. Properties of Chemically Cross-Linked Methylcellulose Gels. Macromolecules 2019. [DOI: 10.1021/acs.macromol.9b01401] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
|
16
|
Xu HN, Chu C, Wang L, Zhang L. Droplet clustering in cyclodextrin-based emulsions mediated by methylcellulose. SOFT MATTER 2019; 15:6842-6851. [PMID: 31406969 DOI: 10.1039/c9sm00875f] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Rapid droplet aggregation in cyclodextrin (CD)-stabilized emulsions limits their practical use as material templates. Herein, we formulate mixtures of submicron CD-based emulsion droplets suspended in aqueous solutions of methylcellulose (MC) with various concentrations and molecular weights. We evaluate the effects of MC on the microstructure and stability of the emulsions using different techniques including optical microscopy, laser particle analysis, confocal laser scanning microscopy and multiple light scattering, explore the rheological behavior of the emulsions through large amplitude oscillatory shear experiments, and study the viscoelastic nonlinearities of the emulsions as a function of strain and strain-rate space through nondimensional elastic and viscous Lissajous-Bowditch plots. It is demonstrated that the emulsion droplets are present in the form of small clusters and their size is almost independent of MC concentration and molecular weight. The clustering pattern is also supported by the changes in viscoelastic properties of the emulsions and the intracycle nonlinear behavior of the Lissajous-Bowditch plots. We propose for the first time that glass-like dynamic arrest takes place with the formation of small equilibrium droplet clusters in the situation where the CD-based emulsion droplets are forced by depletion flocculation and kinetic trapping simultaneously exerted by MC.
Collapse
Affiliation(s)
- Hua-Neng Xu
- State Key Laboratory of Food Science and Technology, Jiangnan University, 1800 Lihu Avenue, Wuxi, Jiangsu 214122, People's Republic of China.
| | | | | | | |
Collapse
|
17
|
Isa Ziembowicz F, de Freitas DV, Bender CR, dos Santos Salbego PR, Piccinin Frizzo C, Pinto Martins MA, Reichert JM, Santos Garcia IT, Kloster CL, Villetti MA. Effect of mono- and dicationic ionic liquids on the viscosity and thermogelation of methylcellulose in the semi-diluted regime. Carbohydr Polym 2019; 214:174-185. [DOI: 10.1016/j.carbpol.2019.02.095] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2018] [Revised: 02/26/2019] [Accepted: 02/27/2019] [Indexed: 11/24/2022]
|
18
|
Hynninen V, Mohammadi P, Wagermaier W, Hietala S, Linder MB, Ikkala O, Nonappa. Methyl cellulose/cellulose nanocrystal nanocomposite fibers with high ductility. Eur Polym J 2019. [DOI: 10.1016/j.eurpolymj.2018.12.035] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
|
19
|
Morozova S, Schmidt PW, Bates FS, Lodge TP. Effect of Poly(ethylene glycol) Grafting Density on Methylcellulose Fibril Formation. Macromolecules 2018. [DOI: 10.1021/acs.macromol.8b01899] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
|
20
|
Chatterjee T, O’Donnell KP, Rickard MA, Nickless B, Li Y, Ginzburg VV, Sammler RL. Rheology of Cellulose Ether Excipients Designed for Hot Melt Extrusion. Biomacromolecules 2018; 19:4430-4441. [DOI: 10.1021/acs.biomac.8b01306] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Tirtha Chatterjee
- Dow Water and Process Solutions, The Dow Chemical Company, Collegeville, Pennsylvania 19426, United States
| | - Kevin P. O’Donnell
- Dow Food, Pharma, and Medical, The Dow Chemical Company, Midland, Michigan 48674, United States
| | - Mark A. Rickard
- Analytical Sciences, Core R&D, The Dow Chemical Company, Midland, Michigan 48667, United States
| | - Brian Nickless
- Materials Science and Engineering, Core R&D, The Dow Chemical Company, Midland, Michigan 48674, United States
| | - Yongfu Li
- Analytical Sciences, Core R&D, The Dow Chemical Company, Midland, Michigan 48667, United States
| | - Valeriy V. Ginzburg
- Materials Science and Engineering, Core R&D, The Dow Chemical Company, Midland, Michigan 48674, United States
| | - Robert L. Sammler
- Materials Science and Engineering, Core R&D, The Dow Chemical Company, Midland, Michigan 48674, United States
| |
Collapse
|
21
|
Schmidt PW, Morozova S, Owens PM, Adden R, Li Y, Bates FS, Lodge TP. Molecular Weight Dependence of Methylcellulose Fibrillar Networks. Macromolecules 2018. [DOI: 10.1021/acs.macromol.8b01292] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
| | | | | | - Roland Adden
- Dow Pharma
and Food
Solutions, Bomlitz 05161, Germany
| | - Yongfu Li
- Analytical Sciences, The Dow Chemical Company, Midland, Michigan 48667, United States
| | | | | |
Collapse
|
22
|
Hynninen V, Hietala S, McKee JR, Murtomäki L, Rojas OJ, Ikkala O, Nonappa. Inverse Thermoreversible Mechanical Stiffening and Birefringence in a Methylcellulose/Cellulose Nanocrystal Hydrogel. Biomacromolecules 2018; 19:2795-2804. [PMID: 29733648 PMCID: PMC6095634 DOI: 10.1021/acs.biomac.8b00392] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2018] [Revised: 05/06/2018] [Indexed: 12/19/2022]
Abstract
We show that composite hydrogels comprising methyl cellulose (MC) and cellulose nanocrystal (CNC) colloidal rods display a reversible and enhanced rheological storage modulus and optical birefringence upon heating, i.e., inverse thermoreversibility. Dynamic rheology, quantitative polarized optical microscopy, isothermal titration calorimetry (ITC), circular dichroism (CD), and scanning and transmission electron microscopy (SEM and TEM) were used for characterization. The concentration of CNCs in aqueous media was varied up to 3.5 wt % (i.e, keeping the concentration below the critical aq concentration) while maintaining the MC aq concentration at 1.0 wt %. At 20 °C, MC/CNC underwent gelation upon passing the CNC concentration of 1.5 wt %. At this point, the storage modulus ( G') reached a plateau, and the birefringence underwent a stepwise increase, thus suggesting a percolative phenomenon. The storage modulus ( G') of the composite gels was an order of magnitude higher at 60 °C compared to that at 20 °C. ITC results suggested that, at 60 °C, the CNC rods were entropically driven to interact with MC chains, which according to recent studies collapse at this temperature into ring-like, colloidal-scale persistent fibrils with hollow cross-sections. Consequently, the tendency of the MC to form more persistent aggregates promotes the interactions between the CNC chiral aggregates towards enhanced storage modulus and birefringence. At room temperature, ITC shows enthalpic binding between CNCs and MC with the latter comprising aqueous, molecularly dispersed polymer chains that lead to looser and less birefringent material. TEM, SEM, and CD indicate CNC chiral fragments within a MC/CNC composite gel. Thus, MC/CNC hybrid networks offer materials with tunable rheological properties and access to liquid crystalline properties at low CNC concentrations.
Collapse
Affiliation(s)
- Ville Hynninen
- Department
of Applied Physics, School of Science, Aalto
University, P.O. Box 15100, FI-00076 Espoo, Finland
| | - Sami Hietala
- Department
of Chemistry, University of Helsinki, P.O. Box 55, FI-00014 HY Helsinki, Finland
| | | | - Lasse Murtomäki
- Departments
of Chemical and Metallurgical Engineering and Chemistry and Materials
Science, School of Chemical Engineering, Aalto University, P.O. Box 16300, FI-00076 Espoo, Finland
| | - Orlando J. Rojas
- Department
of Applied Physics, School of Science, Aalto
University, P.O. Box 15100, FI-00076 Espoo, Finland
- Department
of Bioproducts and Biosystems, School of Chemical Engineering, Aalto University, P.O.
Box 16300, FI-00076 Espoo, Finland
| | - Olli Ikkala
- Department
of Applied Physics, School of Science, Aalto
University, P.O. Box 15100, FI-00076 Espoo, Finland
- Department
of Bioproducts and Biosystems, School of Chemical Engineering, Aalto University, P.O.
Box 16300, FI-00076 Espoo, Finland
| | - Nonappa
- Department
of Applied Physics, School of Science, Aalto
University, P.O. Box 15100, FI-00076 Espoo, Finland
- Department
of Bioproducts and Biosystems, School of Chemical Engineering, Aalto University, P.O.
Box 16300, FI-00076 Espoo, Finland
| |
Collapse
|
23
|
Morozova S, Schmidt PW, Metaxas A, Bates FS, Lodge TP, Dutcher CS. Extensional Flow Behavior of Methylcellulose Solutions Containing Fibrils. ACS Macro Lett 2018; 7:347-352. [PMID: 35632910 DOI: 10.1021/acsmacrolett.8b00042] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
The extensional properties of semidilute aqueous methylcellulose (MC) solutions have been characterized. Pure aqueous MC solutions are shear-thinning liquids at room temperature. With the addition of 8 wt % NaCl, a fraction of MC self-assembles into long fibrils, which modify the rheological properties of the original MC solution. Capillary Breakup Extensional Rheometry (CaBER) was used to characterize salt-free and 8 wt % NaCl solutions of MC at room temperature. The salt-free solutions exhibit only power-law behavior whereas solutions with NaCl exhibit both power-law and elastic regimes. As MC concentration increases, the extensional relaxation time also increases strongly, from 0.04 s at 0.5 wt % to 4 s at 1 wt %. In addition, the apparent extensional viscosity rapidly increases as a function of increasing MC concentration, from 40 Pa·s at 0.5 wt % to 1300 Pa·s at 1 wt %. This behavior is attributed to the presence of fibrils in the MC solutions containing NaCl.
Collapse
|
24
|
Lodge TP, Maxwell AL, Lott JR, Schmidt PW, McAllister JW, Morozova S, Bates FS, Li Y, Sammler RL. Gelation, Phase Separation, and Fibril Formation in Aqueous Hydroxypropylmethylcellulose Solutions. Biomacromolecules 2018; 19:816-824. [PMID: 29489329 DOI: 10.1021/acs.biomac.7b01611] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
The thermoresponsive behavior of a hydroxypropylmethylcellulose (HPMC) sample in aqueous solutions has been studied by a powerful combination of characterization tools, including rheology, turbidimetry, cryogenic transmission electron microscopy (cryoTEM), light scattering, small-angle neutron scattering (SANS), and small-angle X-ray scattering (SAXS). Consistent with prior literature, solutions with concentrations ranging from 0.3 to 3 wt % exhibit a sharp drop in the dynamic viscoelastic moduli G' and G″ upon heating near 57 °C. The drop in moduli is accompanied by an abrupt increase in turbidity. All the evidence is consistent with this corresponding to liquid-liquid phase separation, leading to polymer-rich droplets in a polymer-depleted matrix. Upon further heating, the moduli increase, and G' exceeds G″, corresponding to gelation. CryoTEM in dilute solutions reveals that HPMC forms fibrils at the same temperature range where the moduli increase. SANS and SAXS confirm the appearance of fibrils over a range of concentration, and that their average diameter is ca. 18 nm; thus gelation is attributable to formation of a sample-spanning network of fibrils. These results are compared in detail with the closely related and well-studied methylcellulose (MC). The HPMC fibrils are generally shorter, more flexible, and contain more water than with MC, and the resulting gel at high temperatures has a much lower modulus. In addition to the differences in fibril structure, the key distinction between HPMC and MC is that the former undergoes liquid-liquid phase separation prior to forming fibrils and associated gelation, whereas the latter forms fibrils first. These results and their interpretation are compared with the prior literature, in light of the relatively recent discovery of the propensity of MC and HPMC to self-assemble into fibrils on heating.
Collapse
|
25
|
Morozova S, Lodge TP. Conformation of Methylcellulose as a Function of Poly(ethylene glycol) Graft Density. ACS Macro Lett 2017; 6:1274-1279. [PMID: 35650781 DOI: 10.1021/acsmacrolett.7b00776] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Low molecular weight thiol-terminated poly(ethylene glycol) (PEG) (M ≈ 800) has been grafted onto a high molecular weight methylcellulose (MC, Mw ≈ 150000) by a facile thiol-ene click reaction; graft densities varied from 0.7% to 33% (grafts per anhydroglucose unit). Static and dynamic light scattering reveals that the overall radius of the chain increases systematically with graft density, in a manner in excellent agreement with theory. As the contour length remains unchanged, it is apparent that grafting leads to an increase in the persistence length of this semiflexible copolymer, by as much as a factor of 4. These results represent the first experimental verification of the excluded volume theory at low grafting densities, and demonstrate a promising synthetic platform for systematically increasing the persistence length of a model semiflexible, water-soluble polymer.
Collapse
Affiliation(s)
- Svetlana Morozova
- Department of Chemistry and ‡Department of Chemical Engineering and Material Science, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Timothy P. Lodge
- Department of Chemistry and ‡Department of Chemical Engineering and Material Science, University of Minnesota, Minneapolis, Minnesota 55455, United States
| |
Collapse
|
26
|
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.
Collapse
|
27
|
Park W, Park SJ, Cho S, Shin H, Jung YS, Lee B, Na K, Kim DH. Intermolecular Structural Change for Thermoswitchable Polymeric Photosensitizer. J Am Chem Soc 2016; 138:10734-7. [PMID: 27535204 DOI: 10.1021/jacs.6b04875] [Citation(s) in RCA: 53] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
We developed a thermoswitchable polymeric photosensitizer (T-PPS) by conjugating PS (Pheophorbide-a, PPb-a) to a temperature-responsive polymer backbone of biocompatible hydroxypropyl cellulose. Self-quenched PS molecules linked in close proximity by π-π stacking in T-PPS were easily transited to an active monomeric state by the temperature-induced phase transition of polymer backbones. The temperature-responsive intermolecular interaction changes of PS molecules in T-PPS were demonstrated in synchrotron small-angle X-ray scattering and UV-vis spectrophotometer analysis. The T-PPS allowed switchable activation and synergistically enhanced cancer cell killing effect at the hyperthermia temperature (45 °C). Our developed T-PPS has the considerable potential not only as a new class of photomedicine in clinics but also as a biosensor based on temperature responsiveness.
Collapse
Affiliation(s)
| | - Sin-Jung Park
- Center for Photomedicine, Department of Biotechnology, The Catholic University of Korea , Bucheon-si, Gyeonggi-do 14662, Republic of Korea
| | | | - Heejun Shin
- Center for Photomedicine, Department of Biotechnology, The Catholic University of Korea , Bucheon-si, Gyeonggi-do 14662, Republic of Korea
| | - Young-Seok Jung
- Center for Photomedicine, Department of Biotechnology, The Catholic University of Korea , Bucheon-si, Gyeonggi-do 14662, Republic of Korea
| | - Byeongdu Lee
- X-ray Science Division, Argonne National Laboratory , Argonne, Illinois 60439, United States
| | - Kun Na
- Center for Photomedicine, Department of Biotechnology, The Catholic University of Korea , Bucheon-si, Gyeonggi-do 14662, Republic of Korea
| | | |
Collapse
|
28
|
Jaspers M, Pape ACH, Voets IK, Rowan AE, Portale G, Kouwer PHJ. Bundle Formation in Biomimetic Hydrogels. Biomacromolecules 2016; 17:2642-9. [DOI: 10.1021/acs.biomac.6b00703] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Affiliation(s)
- Maarten Jaspers
- Radboud University, Institute for Molecules and
Materials, Heyendaalseweg
135, 6525 AJ Nijmegen, The Netherlands
| | - A. C. H. Pape
- Eindhoven University of Technology, Laboratory for
Macromolecular and Organic Chemistry, and Laboratory of Physical Chemistry,
and Institute for Complex Molecular Systems, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - Ilja K. Voets
- Eindhoven University of Technology, Laboratory for
Macromolecular and Organic Chemistry, and Laboratory of Physical Chemistry,
and Institute for Complex Molecular Systems, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - Alan E. Rowan
- Radboud University, Institute for Molecules and
Materials, Heyendaalseweg
135, 6525 AJ Nijmegen, The Netherlands
- The University of Queensland, Australian Institute
for Bioengineering and Nanotechnology, Brisbane, Queensland 4072, Australia
| | - Giuseppe Portale
- Netherlands Organisation for Scientific Research (NWO), DUBBLE CRG at the ESRF, 6 rue Jules Horowitz, 38043 Grenoble Cedex, France
- University of Groningen, Department of Macromolecular
Chemistry and New Polymeric Materials, Nijenborgh 4, 9747 AG Groningen, The Netherlands
| | - Paul H. J. Kouwer
- Radboud University, Institute for Molecules and
Materials, Heyendaalseweg
135, 6525 AJ Nijmegen, The Netherlands
| |
Collapse
|
29
|
Banc A, Charbonneau C, Dahesh M, Appavou MS, Fu Z, Morel MH, Ramos L. Small angle neutron scattering contrast variation reveals heterogeneities of interactions in protein gels. SOFT MATTER 2016; 12:5340-5352. [PMID: 27198847 DOI: 10.1039/c6sm00710d] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
We propose a quantitative approach to probe the spatial heterogeneities of interactions in macromolecular gels, based on a combination of small angle X-ray (SAXS) and neutrons (SANS) scattering. We investigate the structure of model gluten protein gels and show that the gels display radically different SAXS and SANS profiles when the solvent is (at least partially) deuterated. The detailed analysis of the SANS signal as a function of the solvent deuteration demonstrates heterogeneities of sample deuteration at different length scales. The progressive exchange between the protons (H) of the proteins and the deuteriums (D) of the solvent is inhomogeneous and 60 nm large zones that are enriched in H are evidenced. In addition, at low protein concentration, in the sol state, solvent deuteration induces a liquid/liquid phase separation. Complementary biochemical and structure analyses show that the denser protein phase is more protonated and specifically enriched in glutenin, the polymeric fraction of gluten proteins. These findings suggest that the presence of H-rich zones in gluten gels would arise from the preferential interaction of glutenin polymers through a tight network of non-exchangeable intermolecular hydrogen bonds.
Collapse
Affiliation(s)
- A Banc
- Laboratoire Charles Coulomb (L2C), UMR 5221 CNRS-Université de Montpellier, F-34095 Montpellier, France.
| | | | | | | | | | | | | |
Collapse
|
30
|
Altomare L, Cochis A, Carletta A, Rimondini L, Farè S. Thermo-responsive methylcellulose hydrogels as temporary substrate for cell sheet biofabrication. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2016; 27:95. [PMID: 26984360 DOI: 10.1007/s10856-016-5703-8] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/29/2015] [Accepted: 03/05/2016] [Indexed: 06/05/2023]
Abstract
Methylcellulose (MC), a water-soluble polymer derived from cellulose, was investigated as a possible temporary substrate having thermo-responsive properties favorable for cell culturing. MC-based hydrogels were prepared by a dispersion technique, mixing MC powder (2, 4, 6, 8, 10, 12 % w/v) with selected salts (sodium sulphate, Na2SO4), sodium phosphate, calcium chloride, or phosphate buffered saline, to evaluate the influence of different compositions on the thermo-responsive behavior. The inversion test was used to determine the gelation temperatures of the different hydrogel compositions; thermo-mechanical properties and thermo-reversibility of the MC hydrogels were investigated by rheological analysis. Gelation temperatures and rheological behavior depended on the MC concentration and type and concentration of salt used in hydrogel preparation. In vitro cytotoxicity tests, performed using L929 mouse fibroblasts, showed no toxic release from all the tested hydrogels. Among the investigated compositions, the hydrogel composed of 8 % w/v MC with 0.05 M Na2SO4 had a thermo-reversibility temperature at 37 °C. For that reason, this formulation was thus considered to verify the possibility of inducing in vitro spontaneous detachment of cells previously seeded on the hydrogel surface. A continuous cell layer (cell sheet) was allowed to grow and then detached from the hydrogel surface without the use of enzymes, thanks to the thermo-responsive behavior of the MC hydrogel. Immunofluorescence observation confirmed that the detached cell sheet was composed of closely interacting cells.
Collapse
Affiliation(s)
- Lina Altomare
- Dipartimento di Chimica, Materiali e Ingegneria Chimica "G. Natta", Politecnico di Milano, Piazza L. Da Vinci 32, Milan, MI, Italy
- INSTM, Consorzio Nazionale di Scienza e Tecnologia dei Materiali, Local Unit Politecnico di Milano, Milan, Italy
| | - Andrea Cochis
- Dipartimento di Scienze della Salute, Università del Piemonte Orientale (UPO), Via Solaroli 17, 28100, Novara, NO, Italy
- INSTM, Consorzio Nazionale di Scienza e Tecnologia dei Materiali, Local Unit Università del Piemonte Orientale, Novara, Italy
| | - Andrea Carletta
- Dipartimento di Chimica, Materiali e Ingegneria Chimica "G. Natta", Politecnico di Milano, Piazza L. Da Vinci 32, Milan, MI, Italy
| | - Lia Rimondini
- Dipartimento di Scienze della Salute, Università del Piemonte Orientale (UPO), Via Solaroli 17, 28100, Novara, NO, Italy.
- INSTM, Consorzio Nazionale di Scienza e Tecnologia dei Materiali, Local Unit Università del Piemonte Orientale, Novara, Italy.
| | - Silvia Farè
- Dipartimento di Chimica, Materiali e Ingegneria Chimica "G. Natta", Politecnico di Milano, Piazza L. Da Vinci 32, Milan, MI, Italy
- INSTM, Consorzio Nazionale di Scienza e Tecnologia dei Materiali, Local Unit Politecnico di Milano, Milan, Italy
| |
Collapse
|
31
|
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
| |
Collapse
|
32
|
Nikjoo D, Aroguz AZ. Magnetic field responsive methylcellulose-polycaprolactone nanocomposite gels for targeted and controlled release of 5-fluorouracil. INT J POLYM MATER PO 2015. [DOI: 10.1080/00914037.2015.1129954] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
|
33
|
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
| |
Collapse
|
34
|
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.
Collapse
Affiliation(s)
| | | | | | - Robert L. Sammler
- Materials
Science and Engineering, The Dow Chemical Company, Midland, Michigan 48674, United States
| | | | | |
Collapse
|
35
|
Methylcellulose, a Cellulose Derivative with Original Physical Properties and Extended Applications. Polymers (Basel) 2015. [DOI: 10.3390/polym7050777] [Citation(s) in RCA: 218] [Impact Index Per Article: 24.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
|
36
|
da Silva MA, Bode F, Grillo I, Dreiss CA. Exploring the Kinetics of Gelation and Final Architecture of Enzymatically Cross-Linked Chitosan/Gelatin Gels. Biomacromolecules 2015; 16:1401-9. [DOI: 10.1021/acs.biomac.5b00205] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Marcelo A. da Silva
- King’s
College London, Institute of Pharmaceutical Science, 150 Stamford Street, London, SE1 9NH, United Kingdom
| | - Franziska Bode
- King’s
College London, Institute of Pharmaceutical Science, 150 Stamford Street, London, SE1 9NH, United Kingdom
| | - Isabelle Grillo
- LSS Group,
Institut
Laue-Langevin, 6 rue Jules Horowitz
BP 156, F-38042 Grenoble, Cedex 9, France
| | - Cécile A. Dreiss
- King’s
College London, Institute of Pharmaceutical Science, 150 Stamford Street, London, SE1 9NH, United Kingdom
| |
Collapse
|
37
|
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.
Collapse
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
| |
Collapse
|
38
|
Dahesh M, Banc A, Duri A, Morel MH, Ramos L. Polymeric Assembly of Gluten Proteins in an Aqueous Ethanol Solvent. J Phys Chem B 2014; 118:11065-76. [DOI: 10.1021/jp5047134] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Mohsen Dahesh
- Université Montpellier 2, Laboratoire Charles Coulomb
UMR 5221, F-34095, Montpellier, France
- CNRS, Laboratoire Charles Coulomb UMR 5221, F-34095, Montpellier, France
- UMR IATE, UM2-CIRAD-INRA-SupAgro, 2 pl Pierre Viala, 34070 Montpellier, France
| | - Amélie Banc
- Université Montpellier 2, Laboratoire Charles Coulomb
UMR 5221, F-34095, Montpellier, France
- CNRS, Laboratoire Charles Coulomb UMR 5221, F-34095, Montpellier, France
| | - Agnès Duri
- UMR IATE, UM2-CIRAD-INRA-SupAgro, 2 pl Pierre Viala, 34070 Montpellier, France
| | - Marie-Hélène Morel
- UMR IATE, UM2-CIRAD-INRA-SupAgro, 2 pl Pierre Viala, 34070 Montpellier, France
| | - Laurence Ramos
- Université Montpellier 2, Laboratoire Charles Coulomb
UMR 5221, F-34095, Montpellier, France
- CNRS, Laboratoire Charles Coulomb UMR 5221, F-34095, Montpellier, France
| |
Collapse
|
39
|
Huang CC, Liao ZX, Chen DY, Hsiao CW, Chang Y, Sung HW. Injectable cell constructs fabricated via culture on a thermoresponsive methylcellulose hydrogel system for the treatment of ischemic diseases. Adv Healthc Mater 2014; 3:1133-48. [PMID: 24470263 DOI: 10.1002/adhm.201300605] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2013] [Revised: 12/06/2013] [Indexed: 01/06/2023]
Abstract
Cell transplantation via direct intramuscular injection is a promising therapy for patients with ischemic diseases. However, following injections, retention of transplanted cells in engrafted areas remains problematic, and can be deleterious to cell-transplantation therapy. In this Progress Report, a thermoresponsive hydrogel system composed of aqueous methylcellulose (MC) blended with phosphate-buffered saline is constructed to grow cell sheet fragments and cell bodies for the treatment of ischemic diseases. The as-prepared MC hydrogel system undergoes a sol-gel reversible transition upon heating or cooling at ≈32 °C. Via this unique property, the grown cell sheet fragments (cell bodies) can be harvested without using proteolytic enzymes; consequently, their inherent extracellular matrices (ECMs) and integrative adhesive agents remain well preserved. In animal studies using rats and pigs with experimentally created myocardial infarction, the injected cell sheet fragments (cell bodies) become entrapped in the interstices of muscular tissues and adhere to engraftment sites, while a minimal number of cells exist in the group receiving dissociated cells. Moreover, transplantation of cell sheet fragments (cell bodies) significantly increases vascular density, thereby improving the function of an infarcted heart. These experimental results demonstrate that cell sheet fragments (cell bodies) function as a cell-delivery construct by providing a favorable ECM environment to retain transplanted cells locally and consequently, improving the efficacy of therapeutic cell transplantation.
Collapse
Affiliation(s)
- Chieh-Cheng Huang
- Department of Chemical Engineering and Institute of Biomedical Engineering; National Tsing Hua University; Hsinchu 30013 Taiwan (ROC)
| | - Zi-Xian Liao
- Department of Chemical Engineering and Institute of Biomedical Engineering; National Tsing Hua University; Hsinchu 30013 Taiwan (ROC)
| | - Ding-Yuan Chen
- Department of Chemical Engineering and Institute of Biomedical Engineering; National Tsing Hua University; Hsinchu 30013 Taiwan (ROC)
| | - Chun-Wen Hsiao
- Department of Chemical Engineering and Institute of Biomedical Engineering; National Tsing Hua University; Hsinchu 30013 Taiwan (ROC)
| | - Yen Chang
- Division of Cardiovascular Surgery; Veterans General Hospital at Taichung; Taichung 40705 Taiwan (ROC)
- College of Medicine, National Yang-Ming University; Taipei 11221 Taiwan (ROC)
| | - Hsing-Wen Sung
- Department of Chemical Engineering and Institute of Biomedical Engineering; National Tsing Hua University; Hsinchu 30013 Taiwan (ROC)
| |
Collapse
|
40
|
Lembré P, Di Martino P, Vendrely C. Amyloid peptides derived from CsgA and FapC modify the viscoelastic properties of biofilm model matrices. BIOFOULING 2014; 30:415-426. [PMID: 24592895 DOI: 10.1080/08927014.2014.880112] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
The bacterial biofilm is a complex environment of cells, which secrete a matrix made of various components, mainly polysaccharides and proteins. An understanding of the precise role of these components in the stability and dynamics of biofilm architecture would be a great advantage for the improvement of anti-biofilm strategies. Here, artificial biofilm matrices made of polysaccharides and auto-assembled peptides were designed, and the influence of bacterial amyloid proteins on the mechanical properties of the biofilm matrix was studied. The model polysaccharides methylcellulose and alginate and peptides derived from the amyloid proteins curli and FapC found in biofilms of Enterobacteriaceae and Pseudomonas, respectively, were used. Rheological measurements showed that the amyloid peptides do not prevent the gelation of the polysaccharides but influence deformation of the matrices under shear stress and modify the gel elastic response. Hence the secretion of amyloids could be for the biofilm a way of adapting to environmental changes.
Collapse
Affiliation(s)
- Pierre Lembré
- a Laboratoire ERRMECe-EA1391 , Institut des matériaux-FD4122, Université de Cergy-Pontoise , Cergy-Pontoise Cedex , France
| | | | | |
Collapse
|
41
|
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
| |
Collapse
|
42
|
Lott JR, McAllister JW, Arvidson SA, Bates FS, Lodge TP. Fibrillar Structure of Methylcellulose Hydrogels. Biomacromolecules 2013; 14:2484-8. [DOI: 10.1021/bm400694r] [Citation(s) in RCA: 88] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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
| | - Sara A. Arvidson
- Department
of Chemistry, University of Minnesota,
Minneapolis, Minnesota 55455,
United States
| | - Frank S. Bates
- Department
of Chemical Engineering
and 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
and Materials Science, University of Minnesota, Minneapolis, Minnesota 55455, United States
| |
Collapse
|