151
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Li MC, Wu Q, Song K, De Hoop CF, Lee S, Qing Y, Wu Y. Cellulose Nanocrystals and Polyanionic Cellulose as Additives in Bentonite Water-Based Drilling Fluids: Rheological Modeling and Filtration Mechanisms. Ind Eng Chem Res 2015. [DOI: 10.1021/acs.iecr.5b03510] [Citation(s) in RCA: 123] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Mei-Chun Li
- School
of Renewable Natural Resources, Louisiana State University AgCenter, Baton
Rouge, Louisiana 70803, United States
| | - Qinglin Wu
- School
of Renewable Natural Resources, Louisiana State University AgCenter, Baton
Rouge, Louisiana 70803, United States
| | - Kunlin Song
- School
of Renewable Natural Resources, Louisiana State University AgCenter, Baton
Rouge, Louisiana 70803, United States
| | - Corneils F. De Hoop
- School
of Renewable Natural Resources, Louisiana State University AgCenter, Baton
Rouge, Louisiana 70803, United States
| | - Sunyoung Lee
- Department
of Forest Products, Korea Forest Research Institute, Seoul 130-712, Korea
| | - Yan Qing
- College
of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China
| | - Yiqiang Wu
- College
of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China
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152
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Highly porous, ultra-low refractive index coatings produced through random packing of silicated cellulose nanocrystals. Colloids Surf A Physicochem Eng Asp 2015. [DOI: 10.1016/j.colsurfa.2015.09.041] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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153
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Sinha A, Martin EM, Lim KT, Carrier DJ, Han H, Zharov VP, Kim JW. Cellulose Nanocrystals as Advanced "Green" Materials for Biological and Biomedical Engineering. ACTA ACUST UNITED AC 2015. [DOI: 10.5307/jbe.2015.40.4.373] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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154
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Li B, Xu W, Kronlund D, Määttänen A, Liu J, Smått JH, Peltonen J, Willför S, Mu X, Xu C. Cellulose nanocrystals prepared via formic acid hydrolysis followed by TEMPO-mediated oxidation. Carbohydr Polym 2015; 133:605-12. [DOI: 10.1016/j.carbpol.2015.07.033] [Citation(s) in RCA: 115] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2015] [Revised: 06/30/2015] [Accepted: 07/08/2015] [Indexed: 10/23/2022]
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155
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Nicharat A, Sapkota J, Weder C, Foster EJ. Melt processing of polyamide 12 and cellulose nanocrystals nanocomposites. J Appl Polym Sci 2015. [DOI: 10.1002/app.42752] [Citation(s) in RCA: 48] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Apiradee Nicharat
- Adolphe Merkle Institute; University of Fribourg; Fribourg Switzerland
| | - Janak Sapkota
- Adolphe Merkle Institute; University of Fribourg; Fribourg Switzerland
| | - Christoph Weder
- Adolphe Merkle Institute; University of Fribourg; Fribourg Switzerland
| | - E. Johan Foster
- Adolphe Merkle Institute; University of Fribourg; Fribourg Switzerland
- Department of Materials Science and Engineering; Virginia Tech, Macromolecules and Interfaces Institute; Blacksburg VA
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156
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Kim DH, Song YS. Rheological behavior of cellulose nanowhisker suspension under magnetic field. Carbohydr Polym 2015; 126:240-7. [DOI: 10.1016/j.carbpol.2015.03.026] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2014] [Revised: 03/12/2015] [Accepted: 03/13/2015] [Indexed: 11/17/2022]
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157
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Chau M, Sriskandha SE, Pichugin D, Thérien-Aubin H, Nykypanchuk D, Chauve G, Méthot M, Bouchard J, Gang O, Kumacheva E. Ion-Mediated Gelation of Aqueous Suspensions of Cellulose Nanocrystals. Biomacromolecules 2015; 16:2455-62. [DOI: 10.1021/acs.biomac.5b00701] [Citation(s) in RCA: 132] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Mokit Chau
- Department
of Chemistry, University of Toronto, 80 Saint George Street, Toronto, Ontario M5S 3H6, Canada
| | - Shivanthi E. Sriskandha
- Department
of Chemistry, University of Toronto, 80 Saint George Street, Toronto, Ontario M5S 3H6, Canada
| | - Dmitry Pichugin
- Department
of Chemistry, University of Toronto, 80 Saint George Street, Toronto, Ontario M5S 3H6, Canada
| | - Héloïse Thérien-Aubin
- Department
of Chemistry, University of Toronto, 80 Saint George Street, Toronto, Ontario M5S 3H6, Canada
| | - Dmitro Nykypanchuk
- Center
for Functional Nanomaterials, Brookhaven National Laboratory, Upton, New York 11973, United States
| | - Grégory Chauve
- FPInnovations, 570 St. Jean Boulevard, Pointe-Claire, Québec H9R 3J9, Canada
| | - Myriam Méthot
- FPInnovations, 570 St. Jean Boulevard, Pointe-Claire, Québec H9R 3J9, Canada
| | - Jean Bouchard
- FPInnovations, 570 St. Jean Boulevard, Pointe-Claire, Québec H9R 3J9, Canada
| | - Oleg Gang
- Center
for Functional Nanomaterials, Brookhaven National Laboratory, Upton, New York 11973, United States
| | - Eugenia Kumacheva
- Department
of Chemistry, University of Toronto, 80 Saint George Street, Toronto, Ontario M5S 3H6, Canada
- Department
of Chemical Engineering and Applied Chemistry, University of Toronto, 200 College Street, Toronto, Ontario M5S 3E5, Canada
- The
Institute of Biomaterials and Biomedical Engineering, University of Toronto, 4 Taddle Creek Road, Toronto, Ontario M5S 3G9, Canada
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158
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Jin Y, Hengl N, Baup S, Pignon F, Gondrexon N, Sztucki M, Romdhane A, Guillet A, Aurousseau M. Ultrasonic assisted cross-flow ultrafiltration of starch and cellulose nanocrystals suspensions: Characterization at multi-scales. Carbohydr Polym 2015; 124:66-76. [DOI: 10.1016/j.carbpol.2015.01.073] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2014] [Revised: 01/26/2015] [Accepted: 01/28/2015] [Indexed: 10/24/2022]
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159
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Fine microstructure of processed chitosan nanofibril networks preserving directional packing and high molecular weight. Carbohydr Polym 2015; 131:1-8. [PMID: 26256153 DOI: 10.1016/j.carbpol.2015.05.011] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2014] [Revised: 04/30/2015] [Accepted: 05/04/2015] [Indexed: 11/21/2022]
Abstract
Crystalline chitosan nanofibril networks were prepared, preserving the native structural packing and the polymer high molecular weight. The fine microstructure of the nanomaterial, obtained by mild hydrolysis of chitosan (CHI), was characterized by using synchrotron small- and wide-angle X-ray scattering (SAXS and WAXS), transmission electron microscopy (TEM) and electron diffraction. Hydrolysis of chitosan yielded a network of crystalline nanofibrils, containing both allomorphs of chitosan: hydrated and anhydrous. The comparison of WAXS data in transmission and reflection mode revealed the preferential orientation of the CHI crystals when subjected to mechanical compression constrains. The results are in agreement with the existence of a network nanostructure containing fiber-like crystals with the principal axis parallel to the polymer chain axis. The evolution of the CHI allomorphic composition with temperature was studied to further elucidate the mechanism of structural transitions occurring during CHI nanofibril network processing.
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160
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Bardet R, Belgacem N, Bras J. Flexibility and color monitoring of cellulose nanocrystal iridescent solid films using anionic or neutral polymers. ACS APPLIED MATERIALS & INTERFACES 2015; 7:4010-8. [PMID: 25552332 DOI: 10.1021/am506786t] [Citation(s) in RCA: 131] [Impact Index Per Article: 14.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Abstract
One property of sulfated cellulose nanocrystals (CNCs) is their ability to self-assemble from a concentrated suspension under specific drying conditions into an iridescent film. Such colored films are very brittle, which makes them difficult to handle or integrate within an industrial process. The goal of this study is (i) to produce flexible films using neutral poly(ethylene glycol) (PEG) and (ii) to modulate their coloration using an anionic polyacrylate (PAAS). The first part is dedicated to studying the physicochemical interactions of the two polymers with CNCs using techniques such as zeta potential measurements, dynamic light scattering (DLS), quartz crystal microbalance (QCM), and atomic force microscopy (AFM). Iridescent solid films were then produced and characterized using scanning electron microscopy (SEM) and UV-visible spectroscopy. The mechanical and thermal properties of films incorporating CNC were measured to evaluate improvements in flexibility. The addition of 10 wt % of PEG makes these films much more flexible (with a doubling of the elongation), with the coloration being preserved and the temperature of degradation increasing by almost 35 °C. Up to 160 μmol/gCNC PAAS can be added to tune the coloration of the CNC films by producing a more narrow, stronger coloration in the visible spectrum (higher absorption) with a well-pronounced fingerprint texture.
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161
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Chau M, Sriskandha SE, Thérien-Aubin H, Kumacheva E. Supramolecular Nanofibrillar Polymer Hydrogels. SUPRAMOLECULAR POLYMER NETWORKS AND GELS 2015. [DOI: 10.1007/978-3-319-15404-6_5] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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162
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Mu X, Gray DG. Formation of chiral nematic films from cellulose nanocrystal suspensions is a two-stage process. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:9256-60. [PMID: 25069681 DOI: 10.1021/la501741r] [Citation(s) in RCA: 113] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Abstract
The evaporation of aqueous suspensions of cellulose nanocrystals (CNCs) gives iridescent chiral nematic films with reflection colors at visible wavelengths. A key problem is controlling the chiral nematic pitch, P, and hence the reflection colors of CNC films. By adding D-(+)-glucose to the suspension, we show that the change in P during evaporation occurs in two distinct stages. The first stage is the decrease in P as the concentration of CNC in the chiral nematic suspension increases due to evaporation; the addition of glucose causes a decrease in P at this stage. In a second stage, a concentration of CNC is reached where the formation of ordered gels and glasses prevents further major changes in P. The addition of glucose lowers the CNC concentration at which this occurs, leading to an increase in P and hence an overall shift to the red end of the spectrum in the final film.
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Affiliation(s)
- Xiaoyue Mu
- Department of Chemistry, McGill University , Pulp and Paper Building, 3420 University Street, Montreal, QC, Canada H3A 2A7
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163
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164
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Sautina NV, Sitdikova KI, Galyametdinov YG. Study of phase transitions in lyotropic liquid-crystal emulsion systems tetraethylene glycol monododecyl ether, water, and vaseline oil by the wetting angle method. RUSS J APPL CHEM+ 2014. [DOI: 10.1134/s107042721404003x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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165
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Xu T, Davis VA. Liquid crystalline phase behavior of silica nanorods in dimethyl sulfoxide and water. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:4806-4813. [PMID: 24730665 DOI: 10.1021/la405013h] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
We report lyotropic smectic liquid crystalline phase behavior of silica nanorods dispersed in binary mixtures of dimethyl sulfoxide (DMSO) and water (H2O). The phase behavior is affected by nanorod size polydispersity and DMSO concentration in the binary solvent. The isotropic to biphasic transition is strongly affected by the relative amount of DMSO in the solvent, but the solvent has little effect on the biphasic to liquid crystal transition above 40/60 DMSO/H2O by volume. At less than 40% DMSO, increasing silica nanorod concentration initially results in the formation of liquid crystalline domains, but further increasing silica concentration results in crystal solvate formation. The morphology of the liquid crystalline phase is strongly affected by the size polydispersity, with lower polydispersity leading to a more uniform structure. As in other lyotropic nanocylinder systems, the microstructure of continuous solid films produced from the dispersions was affected by both the initial microstructure and the applied shear.
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Affiliation(s)
- Teng Xu
- Department of Chemical Engineering, Auburn University , Auburn, Alabama 36849, United States
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166
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Park JH, Noh J, Schütz C, Salazar-Alvarez G, Scalia G, Bergström L, Lagerwall JPF. Macroscopic control of helix orientation in films dried from cholesteric liquid-crystalline cellulose nanocrystal suspensions. Chemphyschem 2014; 15:1477-84. [PMID: 24677344 DOI: 10.1002/cphc.201400062] [Citation(s) in RCA: 119] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2014] [Indexed: 11/07/2022]
Abstract
The intrinsic ability of cellulose nanocrystals (CNCs) to self-organize into films and bulk materials with helical order in a cholesteric liquid crystal is scientifically intriguing and potentially important for the production of renewable multifunctional materials with attractive optical properties. A major obstacle, however, has been the lack of control of helix direction, which results in a defect-rich, mosaic-like domain structure. Herein, a method for guiding the helix during film formation is introduced, which yields dramatically improved uniformity, as confirmed by using polarizing optical and scanning electron microscopy. By raising the CNC concentration in the initial suspension to the fully liquid crystalline range, a vertical helix orientation is promoted, as directed by the macroscopic phase boundaries. Further control of the helix orientation is achieved by subjecting the suspension to a circular shear flow during drying.
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Affiliation(s)
- Ji Hyun Park
- Graduate School of Convergence Science & Technology, Nano Science & Technology Program, Seoul National University, 864-1 Iui-dong, Yeongtong-gu, Suwon-si, Gyeonggi-do (Korea)
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167
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Hu Z, Cranston ED, Ng R, Pelton R. Tuning cellulose nanocrystal gelation with polysaccharides and surfactants. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:2684-2692. [PMID: 24559239 DOI: 10.1021/la404977t] [Citation(s) in RCA: 77] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Gelation of cellulose nanocrystal (CNC) dispersions was measured as a function of the presence of four nonionic polysaccharides. Addition of hydroxyethyl cellulose (HEC), hydroxypropyl guar (HPG), or locust bean gum (LBG) to CNC dispersions induced the gelation of dilute CNC dispersions, whereas dextran (DEX) did not. These behaviors correlated with adsorption tendencies; HEC, HPG, and LBG adsorbed onto CNC-coated quartz crystal microbalance sensors, whereas DEX did not adsorb. We propose that the adsorbing polysaccharides greatly increased the effective volume fraction of dilute CNC dispersions, driving more of the nanocrystals into anisotropic domains. SDS and Triton X-100 addition disrupted HEC-CNC gels whereas CTAB did not. Surface plasmon resonance measurements with CNC-coated sensors showed that SDS and Triton X-100 partially removed adsorbed HEC, whereas CTAB did not. These behaviors illustrate the complexities associated with including CNC dispersions in formulated products: low CNC contents can induce spectacular changes in rheology; however, surfactants and soluble polymers may promote gel formation or induce CNC coagulation.
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Affiliation(s)
- Zhen Hu
- Department of Chemical Engineering, McMaster University , Hamilton, Canada L8S 4L71
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168
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Wu Q, Meng Y, Wang S, Li Y, Fu S, Ma L, Harper D. Rheological behavior of cellulose nanocrystal suspension: Influence of concentration and aspect ratio. J Appl Polym Sci 2014. [DOI: 10.1002/app.40525] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Qiang Wu
- Department of Wood Science and Technology College of Engineering; Zhejiang Agricultural and Forestry University; Hangzhou 311300 China
- Center for Renewable Carbon; Department of Forestry, Wildlife & Fisheries, University of Tennessee; Knoxville Tennessee 37996
| | - Yujie Meng
- Center for Renewable Carbon; Department of Forestry, Wildlife & Fisheries, University of Tennessee; Knoxville Tennessee 37996
| | - Siqun Wang
- Center for Renewable Carbon; Department of Forestry, Wildlife & Fisheries, University of Tennessee; Knoxville Tennessee 37996
| | - Yanjun Li
- Department of Wood Science and Technology College of Engineering; Zhejiang Agricultural and Forestry University; Hangzhou 311300 China
| | - Shenyun Fu
- Department of Wood Science and Technology College of Engineering; Zhejiang Agricultural and Forestry University; Hangzhou 311300 China
| | - Lingfei Ma
- Department of Wood Science and Technology College of Engineering; Zhejiang Agricultural and Forestry University; Hangzhou 311300 China
| | - David Harper
- Center for Renewable Carbon; Department of Forestry, Wildlife & Fisheries, University of Tennessee; Knoxville Tennessee 37996
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169
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Liu D, Wang S, Ma Z, Tian D, Gu M, Lin F. Structure–color mechanism of iridescent cellulose nanocrystal films. RSC Adv 2014. [DOI: 10.1039/c4ra06268j] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Chirality, hydrogen bond interaction and surface charge repulsion among sulfate CNCs have vital impact on the formation of a cholesteric mesogen in a suspension or solidified film. Therefore, changing surface charge density through mechanical disintegration is an effect way to tune the chiroptical properties of iridescent CNC films.
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Affiliation(s)
- Dagang Liu
- Department of Chemistry
- Nanjing University of Information Science and Technology
- Nanjing, China
| | - Shuo Wang
- Department of Chemistry
- Nanjing University of Information Science and Technology
- Nanjing, China
| | - Zhongshi Ma
- Department of Chemistry
- Nanjing University of Information Science and Technology
- Nanjing, China
| | - Donglin Tian
- Department of Chemistry
- Nanjing University of Information Science and Technology
- Nanjing, China
| | - Mingyue Gu
- Department of Chemistry
- Nanjing University of Information Science and Technology
- Nanjing, China
| | - Fengying Lin
- Department of Chemistry
- Nanjing University of Information Science and Technology
- Nanjing, China
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170
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Jia X, Chen Y, Shi C, Ye Y, Wang P, Zeng X, Wu T. Preparation and characterization of cellulose regenerated from phosphoric acid. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2013; 61:12405-14. [PMID: 24279285 DOI: 10.1021/jf4042358] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Abstract
Native cellulose has a highly crystalline structure stabilized by a strong intra- and intermolecular hydrogen-bond network. It is usually not considered as a good gelling material and emulsion stabilizer due to its insolubility in water. Chemical modification is generally necessary to obtain cellulose derivatives for these applications. In this study, we have shown that, by simply disrupting the hydrogen-bond network of cellulose with phosphoric acid treatment, the regenerated cellulose can be a good gelling material and emulsion stabilizer. Microscopy, X-ray diffraction, and Fourier transform infrared spectroscopy analysis have confirmed that the regenerated cellulose is primarily amorphous with low crystallinity in the structure of cellulose II. Stable aqueous suspensions and opaque gels that resist flowing can be obtained with the regenerated cellulose at concentrations higher than 0.6% and 1.6%, respectively. Moreover, it can effectively stabilize oil-in-water emulsions at concentrations less than 1% by a mechanism that combines network and Pickering stabilization.
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Affiliation(s)
- Xuejuan Jia
- College of Food Science and Technology, Nanjing Agricultural University , Weigang 1, Nanjing 210095, People's Republic of China
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171
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Luo Z, Song H, Feng X, Run M, Cui H, Wu L, Gao J, Wang Z. Liquid crystalline phase behavior and sol-gel transition in aqueous halloysite nanotube dispersions. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2013; 29:12358-12366. [PMID: 24070131 DOI: 10.1021/la402836d] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
The liquid crystalline phase behavior and sol-gel transition in halloysite nanotubes (HNTs) aqueous dispersions have been investigated by applying polarized optical microscopy (POM), macroscopic observation, rheometer, small-angle X-ray scattering, scanning electron microscopy, and transmission electron microscopy. The liquid crystalline phase starts to form at the HNT concentration of 1 wt %, and a full liquid crystalline phase forms at the HNT concentration of 25 wt % as observed by POM and macroscopic observation. Rheological measurements indicate a typical shear flow behavior for the HNT aqueous dispersions with concentrations above 20 wt % and further confirm that the sol-gel transition occurs at the HNT concentration of 37 wt %. Furthermore, the HNT aqueous dispersions exhibit pH-induced gelation with more intense birefringence when hydrochloric acid (HCl) is added. The above findings shed light on the phase behaviors of diversely topological HNTs and lay the foundation for fabrication of the long-range ordered nano-objects.
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Affiliation(s)
- Zhiqiang Luo
- College of Chemistry & Environmental Science, Hebei University , Baoding, Hebei Province 071002, China
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172
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173
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Kelly JA, Shukaliak AM, Cheung CCY, Shopsowitz KE, Hamad WY, MacLachlan MJ. Responsive Photonic Hydrogels Based on Nanocrystalline Cellulose. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201302687] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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174
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Kelly JA, Shukaliak AM, Cheung CCY, Shopsowitz KE, Hamad WY, MacLachlan MJ. Responsive photonic hydrogels based on nanocrystalline cellulose. Angew Chem Int Ed Engl 2013; 52:8912-6. [PMID: 23881841 DOI: 10.1002/anie.201302687] [Citation(s) in RCA: 186] [Impact Index Per Article: 16.9] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2013] [Revised: 05/24/2013] [Indexed: 11/09/2022]
Affiliation(s)
- Joel A Kelly
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC, V6T 1Z1, Canada
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175
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Yang X, Guo C, Ji L, Li Y, Tu Y. Liquid crystalline and shear-induced properties of an aqueous solution of graphene oxide sheets. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2013; 29:8103-7. [PMID: 23755877 DOI: 10.1021/la401038c] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
We demonstrated here the lyotropic liquid crystalline behavior of an aqueous solution of graphene oxide (GO) sheets. Scanning electron microscope experiments revealed GO sheets self-assembled into fiber-like or sheet-like structures at different concentrations under flow conditions. As a result, the solution viscosity decreased dramatically with increasing shear stress.
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Affiliation(s)
- Xiaoming Yang
- Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application, Department of Polymer Science and Engineering, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, PR China
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176
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Wu ZL, Arifuzzaman M, Kurokawa T, Le K, Hu J, Sun TL, Furukawa H, Masunaga H, Gong JP. Supramolecular Assemblies of a Semirigid Polyanion in Aqueous Solutions. Macromolecules 2013. [DOI: 10.1021/ma400428n] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- Zi Liang Wu
- Division of
Biological Sciences, Graduate School of Science, Hokkaido University, Sapporo 060-0810, Japan
| | - Md. Arifuzzaman
- Division of
Biological Sciences, Graduate School of Science, Hokkaido University, Sapporo 060-0810, Japan
| | - Takayuki Kurokawa
- Faculty of Advanced Life Science, Graduate
School of Science, Hokkaido University,
Sapporo 060-0810, Japan
| | - Khoa Le
- Faculty of Advanced Life Science, Graduate
School of Science, Hokkaido University,
Sapporo 060-0810, Japan
| | - Jian Hu
- Division of
Biological Sciences, Graduate School of Science, Hokkaido University, Sapporo 060-0810, Japan
| | - Tao Lin Sun
- Division of
Biological Sciences, Graduate School of Science, Hokkaido University, Sapporo 060-0810, Japan
| | - Hidemitsu Furukawa
- Faculty of Advanced Life Science, Graduate
School of Science, Hokkaido University,
Sapporo 060-0810, Japan
| | - Hiroyasu Masunaga
- Japan Synchrotron Radiation Research Institute (JASRI/SPring-8), Sayo-gun, Hyogo 679-5198 Japan
| | - Jian Ping Gong
- Faculty of Advanced Life Science, Graduate
School of Science, Hokkaido University,
Sapporo 060-0810, Japan
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177
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Shafiei-Sabet S, Hamad WY, Hatzikiriakos SG. Rheology of nanocrystalline cellulose aqueous suspensions. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:17124-33. [PMID: 23146090 DOI: 10.1021/la303380v] [Citation(s) in RCA: 164] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
The rheological properties and microstructure of nanocrystalline cellulose (NCC) aqueous suspensions have been investigated at different concentrations. The suspension is isotropic up to 3 wt %, and phase separates to liquid crystalline and isotropic domains at higher concentrations where the samples exhibit a fingerprint texture and the viscosity profile shows a three-region behavior, typical of liquid crystals. The suspension behaves as a rheological gel at even higher concentrations where the viscosity profile shows a single shear thinning behavior over the whole range of shear rates investigated. The effects of ultrasound energy and temperature on the rheological properties and structure of these suspensions were studied using polarized optical microscopy and rheometry. Our results indicate that the amount of applied ultrasound energy affects the microstructure of the suspensions and the pitch of the chiral nematic domains. The viscosity profile is changed significantly at low shear rates, whereas the viscosity of biphasic suspensions at intermediate and high shear rates decreased with increasing temperature. This suggests that, between 30 and 40 °C, structural rearrangement takes place. At higher concentrations of about 10 wt %, the temperature has no significant effect on viscosity; however, a marked increase in viscosity has been observed at around 50 °C. Finally, the Cox-Merz rule was found to fail after a critical concentration, thereby implying significant structural formation. This critical concentration is much higher for sonicated compared to unsonicated suspensions.
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Affiliation(s)
- Sadaf Shafiei-Sabet
- Chemical & Biological Engineering, The University of British Columbia, Vancouver, British Columbia, V6T 1Z3 Canada
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178
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Tan Y, Song Y, Zheng Q. Hydrogen bonding-driven rheological modulation of chemically reduced graphene oxide/poly(vinyl alcohol) suspensions and its application in electrospinning. NANOSCALE 2012; 4:6997-7005. [PMID: 23037898 DOI: 10.1039/c2nr32160b] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
Rheology of graphene oxide (GO) and chemically reduced graphene oxide (RGO) nanosheets suspended in poly(vinyl alcohol) (PVA) solution were investigated by altering nanosheet loading and reduction time of RGO in a wide range. A small amount (0.5 wt%) of GO and RGO in the dilute regime of filler resulted in a threefold increase and a fourfold decrease in steady viscosity at 0.01 s(-1), respectively; increasing GO and RGO loadings in the semi-dilute regime of filler caused steady viscosity to increase to different degrees. Meanwhile, the steady viscosity of the suspension decreased gradually by more than one order of magnitude with increasing reduction time of RGO. By characterizing the microstructure in suspensions, the style and relative density of H-bonding between PVA chains and nanosheets were confirmed to account for the suspension rheology. Modulation of viscosity in a wide range via simply control of the loading and reduction time of RGO was hydrogen bonding-driven, which was successfully applied to electrospinning to prepare nanocomposite nanofibers. The addition of 1 wt% GO and RGO with respect to the polymer mass significantly improved PVA fibrous uniformity and fineness, and the spinnable concentration range of PVA was greatly broadened from (8.5-11.3 wt%) to (5-18 wt%). Meanwhile, the thermal stability of the nanofibers was also enhanced by GO or RGO addition.
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Affiliation(s)
- Yeqiang Tan
- MOE Key Laboratory of Macromolecule Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, PR China
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179
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Lin N, Huang J, Dufresne A. Preparation, properties and applications of polysaccharide nanocrystals in advanced functional nanomaterials: a review. NANOSCALE 2012; 4:3274-94. [PMID: 22565323 DOI: 10.1039/c2nr30260h] [Citation(s) in RCA: 420] [Impact Index Per Article: 35.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Intensive exploration and research in the past few decades on polysaccharide nanocrystals, the highly crystalline nanoscale materials derived from natural resources, mainly focused originally on their use as a reinforcing nanophase in nanocomposites. However, these investigations have led to the emergence of more diverse potential applications exploiting the functionality of these nanomaterials. Based on the construction strategies of functional nanomaterials, this article critically and comprehensively reviews the emerging polysaccharide nanocrystal-based functional nanomaterials with special applications, such as biomedical materials, biomimetic optical nanomaterials, bio-inspired mechanically adaptive nanomaterials, permselective nanostructured membranes, template for synthesizing inorganic nanoparticles, polymer electrolytes, emulsion nano-stabilizer and decontamination of organic pollutants. We focus on the preparation, unique properties and performances of the different polysaccharide nanocrystal materials. At the same time, the advantages, physicochemical properties and chemical modifications of polysaccharide nanocrystals are also comparatively discussed in view of materials development. Finally, the perspective and current challenges of polysaccharide nanocrystals in future functional nanomaterials are outlined.
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Affiliation(s)
- Ning Lin
- Grenoble Institute of Technology (Grenoble INP) - The International School of Paper, Print Media and Biomaterials (Pagora), BP65, 38402 Saint Martin d'Hères Cedex, Grenoble, France
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