51
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Rajeev A, Deshpande AP, Basavaraj MG. Rheology and microstructure of concentrated microcrystalline cellulose (MCC)/1-allyl-3-methylimidazolium chloride (AmimCl)/water mixtures. SOFT MATTER 2018; 14:7615-7624. [PMID: 30159579 DOI: 10.1039/c8sm01448e] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Water added to a solution of microcrystalline cellulose (MCC) in 1-allyl-3-methylimidazolium chloride (AmimCl) reduces the solvent quality and causes significant changes in the flow properties and microstructure due to restructuring and aggregation of cellulose molecules. We report an experimental investigation by means of polarization optical microscopy (POM) and rheology of the distinct phases formed in 5-20 wt% MCC/AmimCl solutions due to the addition of water. With increase in the cellulose concentration, the MCC/AmimCl/water mixtures showed different morphologies such as the non-aligned cholesteric liquid crystalline (LC) domain, the coexistence of spherulite-like structures within the LC domain and a space-spanning network of spherulite-like structures at high concentrations of water. In situ microscopy during shear and POM observations pre and post shear revealed a significant increase in the size of the birefringent domains as the shear rate is increased, which continued to exist even after the cessation of shear. With an increase in the concentration of water, the zero shear viscosity of the MCC/AmimCl/water mixtures was found to go through a minimum, beyond which the aggregation of cellulose commenced. The corresponding oscillatory shear response showed a sol-gel transition with an increase in water concentration. Moreover, at high cellulose concentrations (12-20 wt%), the MCC/AmimCl/water gels exhibited self-similarity and followed the Chambon-Winter (CW) criterion. The similar phase behavior and rheological response observed for MCC dissolved in 1-butyl-3 methylimidazolium chloride (BmimCl) indicated the generality of the presented results.
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Affiliation(s)
- Ashna Rajeev
- Polymer Engineering and Colloid Science Laboratory (PECS), Department of Chemical Engineering, Indian Institute of Technology Madras, India.
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52
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Jimenez LN, Dinic J, Parsi N, Sharma V. Extensional Relaxation Time, Pinch-Off Dynamics, and Printability of Semidilute Polyelectrolyte Solutions. Macromolecules 2018. [DOI: 10.1021/acs.macromol.8b00148] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Leidy Nallely Jimenez
- Department of Chemical Engineering, University of Illinois at Chicago, Chicago, Illinois 60607, United States
| | - Jelena Dinic
- Department of Chemical Engineering, University of Illinois at Chicago, Chicago, Illinois 60607, United States
| | - Nikhila Parsi
- Department of Chemical Engineering, University of Illinois at Chicago, Chicago, Illinois 60607, United States
| | - Vivek Sharma
- Department of Chemical Engineering, University of Illinois at Chicago, Chicago, Illinois 60607, United States
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53
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Asaadi S, Kakko T, King AW, Kilpeläinen I, Hummel M, Sixta H. High-Performance Acetylated Ioncell-F Fibers with Low Degree of Substitution. ACS SUSTAINABLE CHEMISTRY & ENGINEERING 2018; 6:9418-9426. [PMID: 30271692 PMCID: PMC6156107 DOI: 10.1021/acssuschemeng.8b01768] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/19/2018] [Revised: 05/25/2018] [Indexed: 06/08/2023]
Abstract
Cellulose acetate is one of the most important cellulose derivatives. Herein we present a method to access cellulose acetate with a low degree of substitution through a homogeneous reaction in the ionic liquid 1,5-diazabicyclo[4.3.0]non-5-enium acetate ([DBNH][OAc]). This ionic liquid has also been identified as an excellent cellulose solvent for dry-jet wet fiber spinning. Cellulose was dissolved in [DBNH][OAc] and esterified in situ to be immediately spun into modified cellulose filaments with a degree of substitution (DS) value of 0.05-0.75. The structural properties of the resulting fibers, which are characterized by particularly high tensile strength values (525-750 MPa conditioned and 315-615 MPa wet) and elastic moduli between 10-26 GPa, were investigated by birefringence measurements, wide-angle X-ray scattering, and molar mass distribution techniques while their unique interactions with water have been studied through dynamic vapor sorption. Thus, an understanding of the novel process is gained, and the advantages are demonstrated for producing high-value products such as textiles, biocomposites, filters, and membranes.
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Affiliation(s)
- Shirin Asaadi
- Department
of Bioproducts and Biosystems, Aalto University, P.O. Box 16300 FI-00076, Vorimiehentie
1, 02150 Espoo, Finland
| | - Tia Kakko
- Laboratory
of Organic Chemistry, Department of Chemistry, University of Helsinki, P.O. Box 55, 00014 Helsinki, Finland
| | - Alistair W.T. King
- Laboratory
of Organic Chemistry, Department of Chemistry, University of Helsinki, P.O. Box 55, 00014 Helsinki, Finland
| | - Ilkka Kilpeläinen
- Laboratory
of Organic Chemistry, Department of Chemistry, University of Helsinki, P.O. Box 55, 00014 Helsinki, Finland
| | - Michael Hummel
- Department
of Bioproducts and Biosystems, Aalto University, P.O. Box 16300 FI-00076, Vorimiehentie
1, 02150 Espoo, Finland
| | - Herbert Sixta
- Department
of Bioproducts and Biosystems, Aalto University, P.O. Box 16300 FI-00076, Vorimiehentie
1, 02150 Espoo, Finland
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54
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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.
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55
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Yao Y, Yan Z, Li Z, Zhang Y, Wang H. Viscoelastic behavior and sol-gel transition of cellulose/silk fibroin/1-butyl-3-methylimidazolium chloride extended from dilute to concentrated solutions. POLYM ENG SCI 2017. [DOI: 10.1002/pen.24802] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Yongbo Yao
- Jiaxing University; Zhejiang Jiaxing 314001 China
| | - Zhiyong Yan
- Jiaxing University; Zhejiang Jiaxing 314001 China
| | - Zhe Li
- Jiaxing University; Zhejiang Jiaxing 314001 China
| | - Yumei Zhang
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials; Donghua University; Shanghai 201620 China
| | - Huaping Wang
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials; Donghua University; Shanghai 201620 China
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56
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Nanoporous hollow fiber polyethersulfone membranes for the removal of residual contaminants from treated wastewater effluent: Functional and molecular implications. Sep Purif Technol 2017. [DOI: 10.1016/j.seppur.2017.07.058] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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57
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Wu HL, Bremner DH, Wang HJ, Wu JZ, Li HY, Wu JR, Niu SW, Zhu LM. Fabrication and investigation of a biocompatible microfilament with high mechanical performance based on regenerated bacterial cellulose and bacterial cellulose. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2017. [DOI: 10.1016/j.msec.2017.05.073] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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58
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Viscosity and Rheology of Ionic Liquid Mixtures Containing Cellulose and Cosolvents for Advanced Processing. ACTA ACUST UNITED AC 2017. [DOI: 10.1021/bk-2017-1250.ch008] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/13/2023]
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59
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Nazari B, Utomo NW, Colby RH. The Effect of Water on Rheology of Native Cellulose/Ionic Liquids Solutions. Biomacromolecules 2017; 18:2849-2857. [DOI: 10.1021/acs.biomac.7b00789] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Behzad Nazari
- Materials Science and Engineering
and the Materials Research Institute, Penn State University, University Park, Pennsylvania 16802, United States
| | - Nyalaliska W. Utomo
- Materials Science and Engineering
and the Materials Research Institute, Penn State University, University Park, Pennsylvania 16802, United States
| | - Ralph H. Colby
- Materials Science and Engineering
and the Materials Research Institute, Penn State University, University Park, Pennsylvania 16802, United States
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60
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Silva C, Torres M, Chenlo F, Moreira R. Rheology of aqueous mixtures of tragacanth and guar gums: Effects of temperature and polymer ratio. Food Hydrocoll 2017. [DOI: 10.1016/j.foodhyd.2017.02.018] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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61
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62
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Dinic J, Biagioli M, Sharma V. Pinch-off dynamics and extensional relaxation times of intrinsically semi-dilute polymer solutions characterized by dripping-onto-substrate rheometry. ACTA ACUST UNITED AC 2017. [DOI: 10.1002/polb.24388] [Citation(s) in RCA: 53] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Jelena Dinic
- Department of Chemical Engineering; University of Illinois at Chicago; Illinois 60607
| | - Madeleine Biagioli
- Department of Chemical Engineering; University of Illinois at Chicago; Illinois 60607
| | - Vivek Sharma
- Department of Chemical Engineering; University of Illinois at Chicago; Illinois 60607
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63
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Yuan X, Yuan C, Shi W, Chen P, Chen H, Xie H, Xu Q, Guo Y, Zheng Q. Propylene Carbonate Based-Organic Electrolytes for Cellulose Dissolution Processing and Derivatization. ChemistrySelect 2017. [DOI: 10.1002/slct.201700535] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Xia Yuan
- Department of Polymer Materials and Engineering; College of Materials and Metallurgy, Guizhou University; Huaxi District Guiyang 550025 P. R.China
| | - Chaoping Yuan
- Department of Polymer Materials and Engineering; College of Materials and Metallurgy, Guizhou University; Huaxi District Guiyang 550025 P. R.China
| | - Wentao Shi
- Ningbo Key Laboratory of Polymer Materials, Zhejiang Key Laboratory of Marine Materials and Protective Technologies, Ningbo Institute of Materials Technology and Engineering (NIMTE); Chinese Academic of Science; Ningbo 315201 P.R.China
| | - Peng Chen
- Ningbo Key Laboratory of Polymer Materials, Zhejiang Key Laboratory of Marine Materials and Protective Technologies, Ningbo Institute of Materials Technology and Engineering (NIMTE); Chinese Academic of Science; Ningbo 315201 P.R.China
| | - Huaxin Chen
- Department of Polymer Materials and Engineering; College of Materials and Metallurgy, Guizhou University; Huaxi District Guiyang 550025 P. R.China
| | - Haibo Xie
- Department of Polymer Materials and Engineering; College of Materials and Metallurgy, Guizhou University; Huaxi District Guiyang 550025 P. R.China
| | - Qinqin Xu
- Department of Polymer Materials and Engineering; College of Materials and Metallurgy, Guizhou University; Huaxi District Guiyang 550025 P. R.China
| | - Yuanlong Guo
- Department of Polymer Materials and Engineering; College of Materials and Metallurgy, Guizhou University; Huaxi District Guiyang 550025 P. R.China
| | - Qiang Zheng
- Department of Polymer Materials and Engineering; College of Materials and Metallurgy, Guizhou University; Huaxi District Guiyang 550025 P. R.China
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64
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Zhang Z, Xu C, Xiong R, Chrisey DB, Huang Y. Effects of living cells on the bioink printability during laser printing. BIOMICROFLUIDICS 2017; 11:034120. [PMID: 28670353 PMCID: PMC5472480 DOI: 10.1063/1.4985652] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/15/2017] [Accepted: 05/31/2017] [Indexed: 05/24/2023]
Abstract
Laser-induced forward transfer has been a promising orifice-free bioprinting technique for the direct writing of three-dimensional cellular constructs from cell-laden bioinks. In order to optimize the printing performance, the effects of living cells on the bioink printability must be carefully investigated in terms of the ability to generate well-defined jets during the jet/droplet formation process as well as well-defined printed droplets on a receiving substrate during the jet/droplet deposition process. In this study, a time-resolved imaging approach has been implemented to study the jet/droplet formation and deposition processes when printing cell-free and cell-laden bioinks under different laser fluences. It is found that the jetting behavior changes from no material transferring to well-defined jetting with or without an initial bulgy shape to jetting with a bulgy shape/pluming/splashing as the laser fluence increases. Under desirable well-defined jetting, two impingement-based deposition and printing types are identified: droplet-impingement printing and jet-impingement printing with multiple breakups. Compared with cell-free bioink printing, the transfer threshold of the cell-laden bioink is higher while the jet velocity, jet breakup length, and printed droplet size are lower, shorter, and smaller, respectively. The addition of living cells transforms the printing type from jet-impingement printing with multiple breakups to droplet-impingement printing. During the printing of cell-laden bioinks, two non-ideal jetting behaviors, a non-straight jet with a non-straight trajectory and a straight jet with a non-straight trajectory, are identified mainly due to the local nonuniformity and nonhomogeneity of cell-laden bioinks.
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Affiliation(s)
| | - Changxue Xu
- Department of Industrial, Manufacturing, and Systems Engineering, Texas Tech University, Lubbock, Texas 79409, USA
| | - Ruitong Xiong
- Department of Mechanical and Aerospace Engineering, University of Florida, Gainesville, Florida 32611, USA
| | - Douglas B Chrisey
- Department of Physics and Engineering Physics, Tulane University, New Orleans, Louisiana 70118, USA
| | - Yong Huang
- Department of Mechanical and Aerospace Engineering, University of Florida, Gainesville, Florida 32611, USA
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65
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Napso S, Rein DM, Khalfin R, Cohen Y. Semidilute solution structure of cellulose in an ionic liquid and its mixture with a polar organic co-solvent studied by small-angle X-ray scattering. ACTA ACUST UNITED AC 2017. [DOI: 10.1002/polb.24337] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Sofia Napso
- Department of Chemical Engineering; Technion-Israel Institute of Technology; Technion City Haifa 3200003 Israel
| | - Dmitry M. Rein
- Department of Chemical Engineering; Technion-Israel Institute of Technology; Technion City Haifa 3200003 Israel
| | - Rafail Khalfin
- Department of Chemical Engineering; Technion-Israel Institute of Technology; Technion City Haifa 3200003 Israel
| | - Yachin Cohen
- Department of Chemical Engineering; Technion-Israel Institute of Technology; Technion City Haifa 3200003 Israel
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66
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Del Giudice F, Tassieri M, Oelschlaeger C, Shen AQ. When Microrheology, Bulk Rheology, and Microfluidics Meet: Broadband Rheology of Hydroxyethyl Cellulose Water Solutions. Macromolecules 2017. [DOI: 10.1021/acs.macromol.6b02727] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Francesco Del Giudice
- Micro/Bio/Nanofluidics
Unit, Okinawa Institute of Science and Technology Graduate University, 1919-1 Tancha, Onna-son, Kunigami-gun, Okinawa, 904-0495 Japan
| | - Manlio Tassieri
- Division
of Biomedical Engineering, School of Engineering, University of Glasgow, Glasgow G12 8LT, U.K
| | - Claude Oelschlaeger
- Institute
for Mechanical Process Engineering and Mechanics, Karlsruhe Institute of Technology (KIT), Gotthard-Franz-Strasse 3, 76131 Karlsruhe, Germany
| | - Amy Q. Shen
- Micro/Bio/Nanofluidics
Unit, Okinawa Institute of Science and Technology Graduate University, 1919-1 Tancha, Onna-son, Kunigami-gun, Okinawa, 904-0495 Japan
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67
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Dinic J, Jimenez LN, Sharma V. Pinch-off dynamics and dripping-onto-substrate (DoS) rheometry of complex fluids. LAB ON A CHIP 2017; 17:460-473. [PMID: 28001165 DOI: 10.1039/c6lc01155a] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
Liquid transfer and drop formation/deposition processes involve complex free-surface flows including the formation of columnar necks that undergo spontaneous capillary-driven instability, thinning and pinch-off. For simple (Newtonian and inelastic) fluids, a complex interplay of capillary, inertial and viscous stresses determines the nonlinear dynamics underlying finite-time singularity as well as self-similar capillary thinning and pinch-off dynamics. In rheologically complex fluids, extra elastic stresses as well as non-Newtonian shear and extensional viscosities dramatically alter the nonlinear dynamics. Stream-wise velocity gradients that arise within the thinning columnar neck create an extensional flow field, and many complex fluids exhibit a much larger resistance to elongational flows than Newtonian fluids with similar shear viscosity. Characterization of pinch-off dynamics and the response to both shear and extensional flows that influence drop formation/deposition in microfluidic and printing applications requires bespoke instrumentation not available, or easily replicated, in most laboratories. Here we show that dripping-onto-substrate (DoS) rheometry protocols that involve visualization and analysis of capillary-driven thinning and pinch-off dynamics of a columnar neck formed between a nozzle and a sessile drop can be used for measuring shear viscosity, power law index, extensional viscosity, relaxation time and the most relevant processing timescale for printing. We showcase the versatility of DoS rheometry by characterizing and contrasting the pinch-off dynamics of a wide spectrum of simple and complex fluids: water, printing inks, semi-dilute polymer solutions, yield stress fluids, food materials and cosmetics. We show that DoS rheometry enables characterization of low viscosity printing inks and polymer solutions that are beyond the measurable range of commercially-available capillary break-up extensional rheometer (CaBER). We show that for high viscosity fluids, DoS rheometry can be implemented relatively inexpensively using an off-the-shelf digital camera, and for many complex fluids, similar power law scaling exponent describes both neck thinning dynamics and the shear thinning response.
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Affiliation(s)
- Jelena Dinic
- Department of Chemical Engineering, University of Illinois at Chicago, IL 60607, USA.
| | - Leidy Nallely Jimenez
- Department of Chemical Engineering, University of Illinois at Chicago, IL 60607, USA.
| | - Vivek Sharma
- Department of Chemical Engineering, University of Illinois at Chicago, IL 60607, USA.
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68
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69
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Asaadi S, Hummel M, Hellsten S, Härkäsalmi T, Ma Y, Michud A, Sixta H. Renewable High-Performance Fibers from the Chemical Recycling of Cotton Waste Utilizing an Ionic Liquid. CHEMSUSCHEM 2016; 9:3250-3258. [PMID: 27796085 DOI: 10.1002/cssc.201600680] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/22/2016] [Revised: 09/17/2016] [Indexed: 06/06/2023]
Abstract
A new chemical recycling method for waste cotton is presented that allows the production of virgin textile fibers of substantially higher quality than that from the mechanical recycling methods that are used currently. Cotton postconsumer textile wastes were solubilized fully in the cellulose-dissolving ionic liquid 1,5-diazabicyclo[4.3.0]non-5-enium acetate ([DBNH]OAc) to be processed into continuous filaments. As a result of the heterogeneous raw material that had a different molar mass distribution and degree of polymerization, pretreatment to adjust the cellulose degree of polymerization by acid hydrolysis, enzyme hydrolysis, or blending the waste cotton with birch prehydrolyzed kraft pulp was necessary to ensure spinnability. The physical properties of the spun fibers and the effect of the processing parameters on the ultrastructural changes of the fibers were measured. Fibers with a tenacity (tensile strength) of up to 58 cN tex-1 (870 MPa) were prepared, which exceeds that of native cotton and commercial man-made cellulosic fibers.
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Affiliation(s)
- Shirin Asaadi
- Department of Forest Product Technology, Aalto University, Vuorimiehentie 1, P.O. Box 16300, 00076, Espoo, Finland
| | - Michael Hummel
- Department of Forest Product Technology, Aalto University, Vuorimiehentie 1, P.O. Box 16300, 00076, Espoo, Finland
| | - Sanna Hellsten
- Department of Forest Product Technology, Aalto University, Vuorimiehentie 1, P.O. Box 16300, 00076, Espoo, Finland
| | | | - Yibo Ma
- Department of Forest Product Technology, Aalto University, Vuorimiehentie 1, P.O. Box 16300, 00076, Espoo, Finland
| | - Anne Michud
- Department of Forest Product Technology, Aalto University, Vuorimiehentie 1, P.O. Box 16300, 00076, Espoo, Finland
| | - Herbert Sixta
- Department of Forest Product Technology, Aalto University, Vuorimiehentie 1, P.O. Box 16300, 00076, Espoo, Finland
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70
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Forget A, Arya N, Randriantsilefisoa R, Miessmer F, Buck M, Ahmadi V, Jonas D, Blencowe A, Shastri VP. Nonwoven Carboxylated Agarose-Based Fiber Meshes with Antimicrobial Properties. Biomacromolecules 2016; 17:4021-4026. [DOI: 10.1021/acs.biomac.6b01401] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Aurelien Forget
- Future
Industries Institute, University of South Australia, Mawson
Lakes 5095, South Australia, Australia
- Institute
for Macromolecular Chemistry, University of Freiburg, 79104, Freiburg, Germany
| | - Neha Arya
- Institute
for Macromolecular Chemistry, University of Freiburg, 79104, Freiburg, Germany
- Helmholtz Virtual
Institute on Multifunctional Biomaterials for Medicine, Kantstraße 5514513, Teltow, Germany
| | | | - Florian Miessmer
- Institute
for Macromolecular Chemistry, University of Freiburg, 79104, Freiburg, Germany
| | - Marion Buck
- Department
of Environmental Health Science, Universitätklinikum Freiburg, Freiburg 79106, Germany
| | - Vincent Ahmadi
- Institute
for Macromolecular Chemistry, University of Freiburg, 79104, Freiburg, Germany
| | - Daniel Jonas
- Department
of Environmental Health Science, Universitätklinikum Freiburg, Freiburg 79106, Germany
| | - Anton Blencowe
- School
of Pharmacy and Medical Sciences, University of South Australia, Mawson
Lakes 5095, South Australia, Australia
| | - V. Prasad Shastri
- Institute
for Macromolecular Chemistry, University of Freiburg, 79104, Freiburg, Germany
- Helmholtz Virtual
Institute on Multifunctional Biomaterials for Medicine, Kantstraße 5514513, Teltow, Germany
- BIOSS−Centre
for Biological Signaling Studies, University of Freiburg, 79104, Freiburg, Germany
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71
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Gubitosi M, Duarte H, Gentile L, Olsson U, Medronho B. On cellulose dissolution and aggregation in aqueous tetrabutylammonium hydroxide. Biomacromolecules 2016; 17:2873-81. [DOI: 10.1021/acs.biomac.6b00696] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Marta Gubitosi
- Division
of Physical Chemistry, Lund University, SE-22100 Lund, Sweden
| | - Hugo Duarte
- Faculty
of Sciences and Technology (MeditBio), University of Algarve, Campus de
Gambelas, Ed. 8, 8005-139 Faro, Portugal
| | - Luigi Gentile
- Division
of Physical Chemistry, Lund University, SE-22100 Lund, Sweden
| | - Ulf Olsson
- Division
of Physical Chemistry, Lund University, SE-22100 Lund, Sweden
| | - Bruno Medronho
- Faculty
of Sciences and Technology (MeditBio), University of Algarve, Campus de
Gambelas, Ed. 8, 8005-139 Faro, Portugal
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72
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Rheological behavior of poly(acrylonitrile) concentrated solutions: effect of Sb2O3 nanoparticles on shear and extensional flow. Colloid Polym Sci 2016. [DOI: 10.1007/s00396-016-3907-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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73
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74
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Hallmark B, Wilson DI, Pistre N. Characterization of extensional rheological filament stretching with a dual-mode Giesekus model. AIChE J 2016. [DOI: 10.1002/aic.15182] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Bart Hallmark
- Dept. of Chemical Engineering and Biotechnology; New Museums Site; Pembroke St. Cambridge CB2 3RA U.K
| | - D. Ian Wilson
- Dept. of Chemical Engineering and Biotechnology; New Museums Site; Pembroke St. Cambridge CB2 3RA U.K
| | - Nicolas Pistre
- École Nationale Supérieure de Techniques Avancées; 828 Boulevard des Maréchaux 91120 Palaiseau Paris France
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75
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Shear and extensional rheological characterization of poly(acrylonitrile)/halloysite nanocomposite solutions. Eur Polym J 2015. [DOI: 10.1016/j.eurpolymj.2015.09.022] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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76
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Panagopoulou E, Tsouko E, Kopsahelis N, Koutinas A, Mandala I, Evageliou V. Olive oil emulsions formed by catastrophic phase inversion using bacterial cellulose and whey protein isolate. Colloids Surf A Physicochem Eng Asp 2015. [DOI: 10.1016/j.colsurfa.2015.09.056] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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77
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Zarca G, Fernández M, Santamaría A, Ortiz I, Urtiaga A. Non-Newtonian shear-thinning viscosity of carbon monoxide-selective ionic liquid 1-hexyl-3-methylimidazolium chloride doped with CuCl. Sep Purif Technol 2015. [DOI: 10.1016/j.seppur.2015.07.032] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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78
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Extensional flow behavior of aqueous guar gum derivative solutions by capillary breakup elongational rheometry (CaBER). Carbohydr Polym 2015; 136:834-40. [PMID: 26572419 DOI: 10.1016/j.carbpol.2015.09.067] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2015] [Revised: 09/07/2015] [Accepted: 09/21/2015] [Indexed: 11/22/2022]
Abstract
The extensional rheological properties of aqueous ionic carboxymethyl hydroxypropyl guar gum (CMHPG) and non-ionic hydroxypropyl guar gum (HPG) solutions between the semi-dilute solution state and the concentrated network solution state were investigated by capillary breakup elongational rheometry (CaBER). Carboxymethylated guar gum derivatives show an instable filament formation in deionized water. The ratio of elongational relaxation time λE over the shear relaxation time λS follows a power law of λE/λS∼(c · [η])(-2). The difference of the relaxation times in shear and elongation can be related to the loss of entanglements and superstructures in elongational flows at higher strains.
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79
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Sundberg J, Guccini V, Håkansson KM, Salazar-Alvarez G, Toriz G, Gatenholm P. Controlled molecular reorientation enables strong cellulose fibers regenerated from ionic liquid solutions. POLYMER 2015. [DOI: 10.1016/j.polymer.2015.08.035] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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80
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Dinic J, Zhang Y, Jimenez LN, Sharma V. Extensional Relaxation Times of Dilute, Aqueous Polymer Solutions. ACS Macro Lett 2015; 4:804-808. [PMID: 35596480 DOI: 10.1021/acsmacrolett.5b00393] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
We show that visualization and analysis of capillary-driven thinning and pinch-off dynamics of the columnar neck in an asymmetric liquid bridge created by dripping-onto-substrate can be used for characterizing the extensional rheology of complex fluids. Using a particular example of dilute, aqueous PEO solutions, we show the measurement of both the extensional relaxation time and extensional viscosity of weakly elastic, polymeric complex fluids with low shear viscosity η < 20 mPa·s and relatively short relaxation time, λ < 1 ms. Characterization of elastic effects and extensional relaxation times in these dilute solutions is beyond the range measurable in the standard geometries used in commercially available shear and extensional rheometers (including CaBER, capillary breakup extensional rheometer). As the radius of the neck that connects a sessile drop to a nozzle is detected optically, and the extensional response for viscoelastic fluids is characterized by analyzing their elastocapillary self-thinning, we refer to this technique as optically-detected elastocapillary self-thinning dripping-onto-substrate (ODES-DOS) extensional rheometry.
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Affiliation(s)
- Jelena Dinic
- Department
of Chemical Engineering, University of Illinois at Chicago, Chicago, Illinois 60607, United States
| | - Yiran Zhang
- Department
of Chemical Engineering, University of Illinois at Chicago, Chicago, Illinois 60607, United States
| | - Leidy Nallely Jimenez
- Department
of Chemical Engineering, University of Illinois at Chicago, Chicago, Illinois 60607, United States
| | - Vivek Sharma
- Department
of Chemical Engineering, University of Illinois at Chicago, Chicago, Illinois 60607, United States
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81
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Extensional rheology and stability behavior of alumina suspensions in the presence of AMPS-modified polycarboxylate ether-based copolymers. Colloid Polym Sci 2015. [DOI: 10.1007/s00396-015-3683-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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82
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Jaishankar A, Wee M, Matia-Merino L, Goh KK, McKinley GH. Probing hydrogen bond interactions in a shear thickening polysaccharide using nonlinear shear and extensional rheology. Carbohydr Polym 2015; 123:136-45. [DOI: 10.1016/j.carbpol.2015.01.006] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2014] [Revised: 12/24/2014] [Accepted: 01/05/2015] [Indexed: 10/24/2022]
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83
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Dimic-Misic K, Hummel M, Paltakari J, Sixta H, Maloney T, Gane P. From colloidal spheres to nanofibrils: extensional flow properties of mineral pigment and mixtures with micro and nanofibrils under progressive double layer suppression. J Colloid Interface Sci 2015; 446:31-43. [PMID: 25656557 DOI: 10.1016/j.jcis.2015.01.004] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2014] [Accepted: 01/03/2015] [Indexed: 10/24/2022]
Abstract
Suspensions of mineral pigment and cellulose fibrillar derivatives are materials regularly found in the forest products industries, particularly in paper and board production. Many manufacturing processes, including forming and coating employ flow geometries incorporating extensional flow. Traditionally, colloidal mineral pigment suspensions have been considered to show little to no non-linear behaviour in extensional viscosity. Additionally, recently, nanofibrillar materials, such as microfibrillar (MFC) and nanofibrillar cellulose (NFC), collectively termed MNFC, have been confirmed by their failure to follow the Cox-Merz rule to behave more as particulate material rather than showing polymeric rheological properties when dispersed in water. Such suspensions and their mixtures are currently intensively investigated to enable them to generate likely enhanced composite material properties. The processes frequently involve exposure to increasing levels of ionic strength, coming either from the weak solubility of pigments, such as calcium carbonate, or retained salts arising from the feed fibre source processing. By taking the simple case of polyacrylate stabilised calcium carbonate suspension and comparing the extensional viscosity as a function of post extension capillary-induced Hencky strain on a CaBER extensional rheometer over a range of increasing salt concentration, it has been shown that the regime of constriction changes as the classic DLVO double layer is progressively suppressed. This change is seen to lead to a characteristic double (bimodal) measured viscosity response for flocculated systems. With this novel characteristic established, more complex mixed suspensions of calcium carbonate, clay and MNFC have been studied, and the effects of fibrils versus flocculation identified and where possible separated. This technique is suggested to enable a better understanding of the origin of viscoelasticity in these important emerging water-based suspensions.
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Affiliation(s)
- Katarina Dimic-Misic
- School of Chemical Technology, Department of Forest Products Technology, Aalto University, 00076 Aalto, Helsinki, Finland.
| | - Michael Hummel
- School of Chemical Technology, Department of Forest Products Technology, Aalto University, 00076 Aalto, Helsinki, Finland
| | - Jouni Paltakari
- School of Chemical Technology, Department of Forest Products Technology, Aalto University, 00076 Aalto, Helsinki, Finland
| | - Herbert Sixta
- School of Chemical Technology, Department of Forest Products Technology, Aalto University, 00076 Aalto, Helsinki, Finland
| | - Thad Maloney
- School of Chemical Technology, Department of Forest Products Technology, Aalto University, 00076 Aalto, Helsinki, Finland
| | - Patrick Gane
- School of Chemical Technology, Department of Forest Products Technology, Aalto University, 00076 Aalto, Helsinki, Finland; Omya International AG, CH-4665 Oftringen, Switzerland
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84
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Sharma V, Haward SJ, Serdy J, Keshavarz B, Soderlund A, Threlfall-Holmes P, McKinley GH. The rheology of aqueous solutions of ethyl hydroxy-ethyl cellulose (EHEC) and its hydrophobically modified analogue (hmEHEC): extensional flow response in capillary break-up, jetting (ROJER) and in a cross-slot extensional rheometer. SOFT MATTER 2015; 11:3251-70. [PMID: 25782987 DOI: 10.1039/c4sm01661k] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
Cellulose derivatives containing associating hydrophobic groups along their hydrophilic backbone are used as rheology modifiers in the formulation of water-based spray paints, medicinal sprays, cosmetics and printable inks. Jetting and spraying applications of these materials involve progressive thinning and break-up of a fluid column or sheet into drops. Strong extensional kinematics develop in the thinning fluid neck. In viscous Newtonian fluids, inertial and viscous stresses oppose the surface tension-driven instability. In aqueous solutions of polymers such as Ethyl Hydroxy-Ethyl Cellulose (EHEC), chain elongation provides additional elastic stresses that can delay the capillary-driven pinch-off, influencing the sprayability or jettability of the complex fluid. In this study, we quantify the transient response of thinning filaments of cellulose ether solutions to extensional flows in a Capillary Break-up Extensional Rheometer (CaBER) and in a forced jet undergoing break-up using Rayleigh Ohnesorge Jetting Extensional Rheometry (ROJER). We also characterize the steady state molecular deformations using measurements of the flow-induced birefringence and excess pressure drop in an extensional stagnation point flow using a Cross-Slot Extensional Rheometer (CSER). We show that under the high extension rates encountered in jetting and spraying, the semi-dilute solutions of hydrophobically modified ethyl hydroxy-ethyl cellulose (hmEHEC) exhibit extensional thinning, while the unmodified bare chains of EHEC display an increase in extensional viscosity, up to a plateau value. For both EHEC and hmEHEC dispersions, the low extensibility of the cellulose derivatives limits the Trouton ratio observed at the highest extension rates attained (close to 10(5) s(-1)) to around 10-20. The reduction in extensional viscosity with increasing extension rate for the hydrophobically modified cellulose ether is primarily caused by the disruption of a transient elastic network that is initially formed by intermolecular association of hydrophobic stickers. This extensional thinning behavior, in conjunction with the low extensibility of the hydrophobically modified cellulose ether additives, makes these rheology modifiers ideal for controlling the extensional rheology in formulations that require jetting or spraying, with minimal residual stringiness or stranding.
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Affiliation(s)
- Vivek Sharma
- Department of Chemical Engineering, University of Illinois at Chicago, IL 60607, USA.
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85
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Lin D, Li R, Lopez-Sanchez P, Li Z. Physical properties of bacterial cellulose aqueous suspensions treated by high pressure homogenizer. Food Hydrocoll 2015. [DOI: 10.1016/j.foodhyd.2014.10.019] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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86
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Ghobadi S, Sadighikia S, Papila M, Cebeci FÇ, Gürsel SA. Graphene-reinforced poly(vinyl alcohol) electrospun fibers as building blocks for high performance nanocomposites. RSC Adv 2015. [DOI: 10.1039/c5ra15689k] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
Abstract
Graphene-containing fibrous structures with a high level of affinity towards a polymer matrix solution have been proved to be promising for high performance macroscopic nanocomposite reinforcement purposes.
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Affiliation(s)
- Sajjad Ghobadi
- Faculty of Engineering and Natural Sciences
- Sabanci University
- 34956 Istanbul
- Turkey
| | - Sina Sadighikia
- Faculty of Engineering and Natural Sciences
- Sabanci University
- 34956 Istanbul
- Turkey
| | - Melih Papila
- Faculty of Engineering and Natural Sciences
- Sabanci University
- 34956 Istanbul
- Turkey
- Sabanci University Nanotechnology Research and Application Center (SUNUM)
| | - Fevzi Çakmak Cebeci
- Faculty of Engineering and Natural Sciences
- Sabanci University
- 34956 Istanbul
- Turkey
- Sabanci University Nanotechnology Research and Application Center (SUNUM)
| | - Selmiye Alkan Gürsel
- Faculty of Engineering and Natural Sciences
- Sabanci University
- 34956 Istanbul
- Turkey
- Sabanci University Nanotechnology Research and Application Center (SUNUM)
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87
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Hummel M, Michud A, Tanttu M, Asaadi S, Ma Y, Hauru LKJ, Parviainen A, King AWT, Kilpeläinen I, Sixta H. Ionic Liquids for the Production of Man-Made Cellulosic Fibers: Opportunities and Challenges. ADVANCES IN POLYMER SCIENCE 2015. [DOI: 10.1007/12_2015_307] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/03/2022]
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88
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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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89
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Liu X, Zhu C, Dong H, Wang B, Liu R, Zhao N, Li S, Xu J. Effect of microgel content on the shear and extensional rheology of polyacrylonitrile solution. Colloid Polym Sci 2014. [DOI: 10.1007/s00396-014-3419-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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90
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Michud A, Hummel M, Haward S, Sixta H. Monitoring of cellulose depolymerization in 1-ethyl-3-methylimidazolium acetate by shear and elongational rheology. Carbohydr Polym 2014; 117:355-363. [PMID: 25498646 DOI: 10.1016/j.carbpol.2014.09.075] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2014] [Revised: 09/09/2014] [Accepted: 09/21/2014] [Indexed: 10/24/2022]
Abstract
The thermal stability of cellulose in the ionic liquid (IL) 1-ethyl-3-methylimidazolium acetate, [emim]OAc was investigated. For this purpose, Eucalyptus urugrandis prehydrolysis kraft pulp was first dissolved in [emim]OAc by means of a vertical kneader and then stored at three different temperatures to study the time-depended behavior of the cellulose-[emim]OAc system. Cellulose depolymerization was assessed by characterizing the precipitated cellulose and the rheological behavior of the cellulose-[emim]OAc solutions. The results show decreases in the weight average molecular mass and in the shear viscosity at temperatures exceeding 60 °C, which can be related to progressing degradation of cellulose in the IL upon storage at elevated temperature. The changes in behavior of the solutions under extensional stresses also attest the gradual depolymerization of cellulose. The degradation has been analyzed using appropriate kinetic models. Propyl gallate appeared to be an efficient stabilizer of the cellulose-[emim]OAc system during the dissolution step even though the mechanism has not been fully understood yet.
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Affiliation(s)
- Anne Michud
- Department of Forest Products Technology, Aalto University, School of Chemical Technology, Aalto, PO Box 16300, 00076, Espoo, Finland.
| | - Michael Hummel
- Department of Forest Products Technology, Aalto University, School of Chemical Technology, Aalto, PO Box 16300, 00076, Espoo, Finland.
| | - Simon Haward
- Departamento de Engenharia Quımica, CEFT, Faculdade de Engenharia da Universidade do Porto, Rua dr Roberto Frias s/n, 4200-465 Porto, Portugal.
| | - Herbert Sixta
- Department of Forest Products Technology, Aalto University, School of Chemical Technology, Aalto, PO Box 16300, 00076, Espoo, Finland.
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91
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92
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Shear rheology and filament stretching behaviour of xanthan gum and carboxymethyl cellulose solution in presence of saliva. Food Hydrocoll 2014; 40:71-75. [PMID: 25284950 PMCID: PMC4022836 DOI: 10.1016/j.foodhyd.2014.01.029] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2013] [Accepted: 01/29/2014] [Indexed: 11/30/2022]
Abstract
The objective of the work reported in this paper is to determine if saliva addition has an effect on the rheology of xanthan gum solutions. The reasons for the interest was that it has been previously reported that flavour release from high viscosity xanthan thickened foods is not reduced in the same way as foods thickened by other hydrocolloids at comparable viscosities. It was previously postulated that this could be due to an interaction between saliva and xanthan that could change the microstructure and rheology of xanthan solutions. In this work the effect of saliva on the rheology of CMC and xanthan solutions was compared. Solutions of molecularly dissolved xanthan gum and CMC mixed with water or human whole saliva at a ratio of 5:1 showed little impact of the presence of saliva on steady shear or dynamic viscosity for the two hydrocolloids. In filament thinning experiments saliva addition significantly increased filament break-up time for xanthan gum while it had little effect on the break-up time of the CMC filament. Also, filament thinning appeared a lot less even and was not as reproducible in the case of xanthan gum. Addition of CMC and hydroxypropyl methylcellulose (HPMC) to xanthan gum solutions showed a similar increase in break-up time to saliva, but to see this effect the viscosity of the added CMC or HPMC solution had to be very much higher than the viscosity of saliva. The results are discussed in the context of the structure of xanthan gum and the reported extensional rheology of saliva. Shear rheology of xanthan gum and CMC not affected by saliva. Filament break-up time shorter for xanthan than CMC at comparable viscosity. Saliva increases filament break-up time for xanthan but not for CMC. Rigid rod conformation of xanthan promotes interaction with saliva mucin fraction.
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93
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Torres MD, Hallmark B, Wilson DI, Hilliou L. Natural Giesekus fluids: Shear and extensional behavior of food gum solutions in the semidilute regime. AIChE J 2014. [DOI: 10.1002/aic.14611] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Maria D. Torres
- Dept. of Chemical Engineering and Biotechnology; New Museums Site, University of Cambridge; Pembroke St Cambridge CB2 3RA U.K
- Dept. of Chemical Engineering; University of Santiago de Compostela, Lope Gómez de Marzoa St, Santiago de Compostela; E-15782 Spain
| | - Bart Hallmark
- Dept. of Chemical Engineering and Biotechnology; New Museums Site, University of Cambridge; Pembroke St Cambridge CB2 3RA U.K
| | - D. Ian Wilson
- Dept. of Chemical Engineering and Biotechnology; New Museums Site, University of Cambridge; Pembroke St Cambridge CB2 3RA U.K
| | - Loic Hilliou
- Dept. of Polymer Engineering; University of Minho, Campus de Azurém; 4800-058 Guimarães Portugal
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94
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De Figueiredo LP, Ferreira FF. The Rietveld Method as a Tool to Quantify the Amorphous Amount of Microcrystalline Cellulose. J Pharm Sci 2014; 103:1394-9. [DOI: 10.1002/jps.23909] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2013] [Revised: 01/14/2014] [Accepted: 01/31/2014] [Indexed: 11/07/2022]
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95
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Le KA, Rudaz C, Budtova T. Phase diagram, solubility limit and hydrodynamic properties of cellulose in binary solvents with ionic liquid. Carbohydr Polym 2014; 105:237-43. [DOI: 10.1016/j.carbpol.2014.01.085] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2013] [Revised: 01/20/2014] [Accepted: 01/24/2014] [Indexed: 10/25/2022]
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96
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Verger L, Corre S, Poirot R, Quintard G, Fleury E, Charlot A. Dual guar/ionic liquid gels and biohybrid material thereof: Rheological investigation. Carbohydr Polym 2014; 102:932-40. [DOI: 10.1016/j.carbpol.2013.10.043] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2013] [Revised: 09/25/2013] [Accepted: 10/12/2013] [Indexed: 11/29/2022]
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97
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Ries ME, Radhi A, Keating AS, Parker O, Budtova T. Diffusion of 1-ethyl-3-methyl-imidazolium acetate in glucose, cellobiose, and cellulose solutions. Biomacromolecules 2014; 15:609-17. [PMID: 24405090 PMCID: PMC3945830 DOI: 10.1021/bm401652c] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022]
Abstract
![]()
Solutions
of glucose, cellobiose and microcrystalline cellulose
in the ionic liquid 1-ethyl-3-methyl-imidazolium ([C2mim][OAc]) have
been examined using pulsed-field gradient 1H NMR. Diffusion
coefficients of the cation and anion across the temperature range
20–70 °C have been determined for a range of concentrations
(0–15% w/w) of each carbohydrate in [C2mim][OAc]. These systems
behave as an “ideal mixture” of free ions and ions that
are associated with the carbohydrate molecules. The molar ratio of
carbohydrate OH groups to ionic liquid molecules, α, is the
key parameter in determining the diffusion coefficients of the ions.
Master curves for the diffusion coefficients of cation, anion and
their activation energies are generated upon which all our data collapses
when plotted against α. Diffusion coefficients are found to
follow an Arrhenius type behavior and the difference in translational
activation energy between free and associated ions is determined to
be 9.3 ± 0.9 kJ/mol.
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Affiliation(s)
- Michael E Ries
- Soft Matter Physics Research Group, School of Physics and Astronomy, University of Leeds , Leeds, LS2 9JT, United Kingdom
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98
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Daniel A, Dhiman A. Aiding-Buoyancy Mixed Convection from a Pair of Side-by-Side Heated Circular Cylinders in Power-Law Fluids. Ind Eng Chem Res 2013. [DOI: 10.1021/ie4027742] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Alex Daniel
- Department
of Chemical Engineering, Indian Institute of Technology Roorkee, Roorkee 247667, India
| | - Amit Dhiman
- Department
of Chemical Engineering, Indian Institute of Technology Roorkee, Roorkee 247667, India
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99
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Maeda A, Inoue T, Sato T. Dynamic Segment Size of the Cellulose Chain in an Ionic Liquid. Macromolecules 2013. [DOI: 10.1021/ma4010764] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Ayaka Maeda
- Department of Macromolecular Science, Graduate
School
of Science, Osaka University, 1-1 Machikaneyama-cho,
Toyonaka, Osaka 560-0043, Japan
| | - Tadashi Inoue
- Department of Macromolecular Science, Graduate
School
of Science, Osaka University, 1-1 Machikaneyama-cho,
Toyonaka, Osaka 560-0043, Japan
| | - Takahiro Sato
- Department of Macromolecular Science, Graduate
School
of Science, Osaka University, 1-1 Machikaneyama-cho,
Toyonaka, Osaka 560-0043, Japan
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100
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Härdelin L, Perzon E, Hagström B, Walkenström P, Gatenholm P. Influence of molecular weight and rheological behavior on electrospinning cellulose nanofibers from ionic liquids. J Appl Polym Sci 2013. [DOI: 10.1002/app.39449] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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